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          <td width="396" valign="middle" bgcolor="#829db6"><font size="1" face="Arial, Helvetica, sans-serif"><strong> 
            <font color="#FFFFFF" size="4">&nbsp;&nbsp;&nbsp;Sahel Workshop Abstracts</font></strong></font></td>
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          <td width="800" height="1493" bgcolor="#829db6"> <blockquote> 
              <p>&nbsp;</p>
              <p><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="hutchinson"></a>Evolving 
                Contexts of the Desertification Debate &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">A 
                great many debates have grown up around the notion of desertification 
                as a process of degradation that affects the arid, semiarid and 
                subhumid zones of the globe. A fundamental and continuing debate 
                has been over whether desertification actually exists and, if 
                so, how it might be defined, measured and assessed. Rather than 
                simply review the evolution of these debates we examine the contexts 
                in which they take place and how those contexts have contributed 
                to the evolution of our understanding of the intertwined processes 
                that contribute to desertification. The fact that these &#8220;contexts&#8221; 
                have changed over time, and that some of these contexts are often 
                ignored have helped sustain debate. We consider four &#8220;contexts&#8221; 
                that frame much of the debate and consider what impact each has 
                had: (1) changes in our understanding of climate variability; 
                (2) changes in our understanding of vegetation responses to perturbation; 
                (3) changes in our understanding of social processes, including 
                household responses to economic perturbation; and (4) changes 
                in our understanding of desertification as a political process 
                or artifact. </font> </p>
              <hr>
              <p><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="warren"></a>Policy 
                implications of the Sahelian recovery &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The Sahelian greening is 
                one phase in a continuous sequence of wet and dry periods. This 
                paper examines policies in the light of these changes. It looks 
                both at policies involved both in other greenings and in the Sahel 
                itself. The others include Sinai, southern Russia, Arizona and 
                the Loess Plateau in northern China. In Sinai, the policies that 
                brought about greening include exclusion, emigration and nature 
                conservation. In Russia, the policy that had impact was the collapse 
                of the Soviet collective farm system. In Arizona, it came after 
                the Taylor Grazing Act of 1934 which allowed the US Forest Service 
                to manage grazing. On the Loess Plateau, it has been the result 
                of irrigation, tree-planting, the extension of responsibility 
                of land users and perhaps aerial seeding and fencing. Most of 
                these policies are inapplicable to the Sahel, with the possible 
                exception of some of the Chinese measures. <br>
                In the Sahel, some policies in Burkina Faso, and elsewhere did 
                enable soil and water conservation projects, but the success of 
                these projects is more due to the harnessing of local skills. 
                More generally, policy has had little to do with the greening 
                (as with the earlier browning), even though the Sahel has been 
                a seething cauldron of policy debate for three decades. <br>
                Sahelian environmental policies face two main challenges: fast 
                and occasionally extreme fluctuations in rainfall; and changes 
                in the scientific dialectic. There should be less emphasis on 
                the negative policy of controlling land degradation, and more 
                on positive policies that encourage adaptation and allow for rapid 
                deployment to make use of good years and insurance policies against 
                bad ones.</font></p>
              <hr>
              <p><font face="Arial, Helvetica, sans-serif"><strong><font color="#FFFFFF"><a name="olsson"></a>Greening 
                of the Sahel &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></font></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">For 
                the last four decades there has been sustained scientific interest 
                in contemporary environmental change in the Sahel. It suffered 
                several devastating droughts and famines between the late 1960s 
                and early 1990s. Speculation about the climatology of these droughts 
                is unresolved, as is speculation about the effects of land clearance 
                on rainfall and about land degradation in this zone. However, 
                recent findings suggest a consistent trend of increasing vegetation 
                greenness in much of the region. It is not possible to explain 
                the vegetation trend by rainfall only. The paper presents empirical 
                data and discusses possible other causes of this trend such as 
                land use change, migration and armed conflicts. The policy implications 
                of a positive trend in biophysical conditions are also discussed. 
                One conclusion of the findings is that more site-specific information 
                on the interaction of biophysical dynamics (climate, soils, vegetation) 
                and farming systems (farming practices and risk management strategies) 
                is needed in order to better understand and ultimately support 
                the development challenge in the Sahel.</font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="reij"></a>The 
                impact of soil and water conservation on agriculture and environment 
                on the northern part of the Central Plateau of Burkina Faso between 
                1980 and 2001 &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">In 
                the beginning of the 1980s the situation on the northern part 
                of the densely populated Central Plateau was dramatic: drought 
                years succeeded each other, food shortages at household level 
                were endemic and the environment had become degraded. The commonly 
                held view is that the process of environmental degradation continued 
                in the second half of the 1980s as well as in the 1990s. </font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">A 
                study was recently undertaken by a multidisciplinary team of national 
                researchers, who looked at long-term changes in agriculture and 
                environment in this region. Most of their research findings show 
                positive trends. Cereal yields have increased by about 50% since 
                1984-88; in two of the three provinces studied the cultivated 
                area remained stable during the last 15 years; tree density and 
                species diversity are higher on fields treated with soil and water 
                conservation than on untreated fields; livestock numbers have 
                increased and livestock management is evolving from extensive 
                to semi-intensive and a survey in 59 villages shows that, according 
                to the villagers, local groundwater levels have improved substantially 
                since the start of soil and water conservation. Based on criteria 
                used by villagers, which are mainly related to levels of household 
                food security, rural poverty seems to have decreased significantly 
                (up to 50%) in villages with soil and water conservation. </font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">Much 
                has been achieved, but much more remains to be done. It is urgent 
                to improve soil fertility on cultivated land and to fight against 
                land degradation on uncultivated land, which continues unabated. 
                </font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="anyamba"></a>23 
                years of Sahelian vegetation dynamics from NOAA-AVHRR &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">Satellite 
                measurements of the global biosphere in the form of the normalized 
                difference vegetation index (NDVI) have generated a 23 year time 
                series appropriate for the studies seasonal to interannual vegetation 
                dynamics of the Sahel region. The close coupling between Sahelian 
                rainfall and the green-up of vegetation has made it possible to 
                utilize this vegetation index data set as a proxy for the land 
                surface response to climate variability. Examination of the this 
                time series principally reveals two major periods: (a) 1982-1993 
                marked by below average vegetation and persistence of drought 
                with a signature large scale drought during the 1983-1985 period; 
                and (2) 1994-2003, marked by a trend towards &#8220;greener&#8221; 
                conditions with region-wide above normal vegetation conditions 
                in 1994. Spatial patterns enable us to conclude that is not a 
                footprint of desertification, rather they indicated the variability 
                of green vegetation biomass over the region in response to interannual 
                variations in rainfall. Systematic studies of changes on the landscape 
                at local scales using high spatial resolution satellite data sets 
                such as those from LANDSAT, SPOT and MODIS will allow for an improved 
                documentation of degradation of Sahelian land resources that could 
                lead to desertification.</font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif"><strong><a name="Mortimore"></a>Using 
                farmers&#8217; responses to change as a guide to policy at the 
                country level&nbsp;&nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">The 
                dominant narrative influencing Sahelian environmental policy during 
                the past 30 years has been that of &#8216;desertification&#8217;. 
                This narrative is disaggregated into (a) the sub-themes of &#8216;deforestation&#8217;, 
                &#8216;overstocking&#8217;, &#8216;overcultivation&#8217; and 
                over-use of water, (b) sub-hypotheses, which create expectations 
                about farmers&#8217; NRM as an agent of degradation, and (c) biophysical 
                outcomes which have been measured, mapped or assessed. The expectations 
                created by the sub-hypotheses are compared with evidence from 
                selected districts in three countries (Diourbel Region in Senegal, 
                Maradi Department in Niger, and the Kano region of northern Nigeria). 
                Long-term data sets (1960-2000) collected at district level and 
                ground-truthed with village level investigations (1999) are used. 
                The performance of the production systems in these districts departs 
                in significant ways from hypothetical expectations, giving grounds 
                to query their validity, and to construct a counter-narrative. 
                <br>
                The findings of these studies (carried out in collaboration with 
                30 scientists in the countries concerned) have been synthesised 
                with a view to deriving policy lessons for dryland development. 
                A simple narrative of &#8216;desertification&#8217; is inadequate 
                for understanding the flexibility, adaptability and diversity 
                of farmers&#8217; responses to change, and fails to identify the 
                potential for productivity increases, income and welfare improvements. 
                NRM as a whole should be understood within a context of livelihood 
                management, and is therefore strongly influenced by macro-economic 
                policy. Generalised properties of a new dryland development policy 
                approach are outlined. Using the lessons learnt from the research 
                and in subsequent dissemination activities, burning issues that 
                have specific application to Sahelian drylands are identified 
                for policy formation at the country level.</font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><a name="unccd"></a><strong>UNCCD 
                perspectives on the changes in the Sahel<font size="3"> &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></font></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The 
                plight of the Sahel was brought squarely on the international 
                arena by the reports on the debilitating drought of the early 
                seventies, after massive loss of life and property. The international 
                community made attempts to address the issues of drought and desertification 
                by the establishment by UNCOD in 1977, of the well-known Plan 
                of Action, but the efforts fell way short of expectation.</font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The 
                UNCED process and the resultant Chapter 12 of Agenda 21 led to 
                further reflection, but there was felt a strong need for a legally 
                binding instrument. The birth of the UNCCD, the Convention to 
                address the fight against drought and desertification the world 
                over, was the way out. This was a call for paradigm shift, a different 
                way of dealing with the twin problems of drought and desertification.</font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The 
                &#8220;United Nations Convention to Combat Desertification in 
                Those Countries Experiencing Drought and/or Desertification, Particularly 
                in Africa&#8221;, with its entry into force in December of 1996, 
                to date has 190 signatories. The thrust of the UNCCD is for concerted 
                local level action, but with international level support and partnership. 
                </font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The 
                objective of the UNCCD is &#8220;to combat desertification and 
                mitigate the effects of drought&#8230;..through effective action 
                at all levels, supported by international co-operation and partnership 
                arrangements, in the framework of an integrated approach which 
                is consistent with Agenda 21, with a view to contributing to the 
                achievement of sustainable development in affected areas.<br>
                The UNCCD recognizes that achieving this objective will involve 
                long-term integrated strategies that focus simultaneously, in 
                affected areas, on improved productivity of the land and the rehabilitation, 
                conservation, and sustainable management of land and water resources, 
                leading to improved living conditions, in particular at the community 
                level.<br>
                The Sahel is a major entry point in understanding and eventually 
                addressing the seemingly complex problems of recurrent droughts 
                and the ever-present desertification and land degradation. The 
                particular attention given to Africa by the UNCCD includes the 
                Sahel, as testimony to the dire need to take concrete action in 
                that region.</font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">Various 
                interacting forces come into the picture, in influencing not only 
                the natural processes, but also the possible remedial measures. 
                Traditional knowledge and coping strategies of the affected peoples, 
                early warning systems, the role of the prescribed tools - the 
                Convention implementation frameworks, climatic factors, ecological 
                factors, anthropogenic factors, are all important components to 
                be taken into consideration when looking at the &#8220;Changes 
                in the Sahel&#8221;. The combined action of these at local level, 
                national level as well as appropriate international interventions 
                in one way or another hold the key. </font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="toure"></a>Monitoring 
                vegetation growth and mapping changes in landscape : Senegal case 
                study <a href="sahel_abstracts.html">&nbsp;&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">A 
                lack of early warning system in the early 1970s prevented governments 
                and even researchers of having a good appreciation of the droughts 
                occurred, in particular in 1972, in semi-arid zones.<br>
                Since this period, developing tools to monitoring vegetation growth 
                and to estimate available feeding for cattle has been a strong 
                concern for decision makers. The Centre de Suivi Ecologique (CSE) 
                has experienced, in such a context, the development of various 
                products. Decadal NDVI information and annual biomass maps using 
                NOAA/AVHRR and Spot/Vegetation data are some of the products successfully 
                elaborated and regularly published since 1987.<br>
                More recently, some other indicators like VCI and SPI have been 
                successfully applied to drought monitoring in Senegal. <br>
                The process has allowed to set up a NOAA database of well calibrated 
                images. These data have been used to look at the tendency of the 
                vegetation growth at national level. <br>
                At a more localized level, several studies based on satellite 
                images and aerial photos from 1960&#8217;s until 2000 have been 
                conducted to map changes occurred in landuse and land cover. CSE 
                is still continuing to work on this kind of studies with FAO in 
                the framework of the Land degradation assessment project. It is 
                aiming to identify hot and brigth spots and to document their 
                causes using mapping and and censuses. <br>
                Early warning systems are now used in some Sahelian countries 
                on a more operational basis and can be expanded to all Sahelian 
                countries. Detection of changes in Sahel landscape is doable at 
                large and localized areas (access to high resolution data still 
                needs to be improved). Generalization on very large areas should 
                be done carefully. </font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="nicholson"></a>Long-term 
                precipitation variability in the Sahel &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">The 
                Sahel has undergone tremendous fluctuations of rainfall throughout 
                historical times. Extreme and prolonged droughts are an inherent 
                feature of the environment. The fluctuations have been particularly 
                extreme during the last half of the 20th century. The mean rainfall 
                for 30-year periods, the traditional time period for a climatic 
                &#8220;normal&#8221;, decreased 25% to 40% in the Sahel between 
                1931 &#8211; 1960 and 1968 &#8211; 1997. the contrast is even 
                greater when the wettest and driest decades, the 1950s and 1980s, 
                are compared. During those decades, the entire continent was affected. 
                That clearly demonstrates that the main causes of rainfall variability 
                are to be found in the large-scale general atmospheric circulation. 
                These in turn are at least partially driven by sea-surface temperature 
                variability, however El Nino/La Nina does not play a large role.<br>
                Most of the change takes place in August. Wet/dry conditions in 
                the Sahel tend to be associated with a northward/southward displacement 
                of the rainbelt over West Africa. In some cases, however, the 
                reduction in rainfall is associated with an overall weakening 
                of the tropical rainbelt. There is little relationship between 
                the amount of rainfall during the season and length of the season 
                or its onset date. These facts have strong implications for both 
                adaptive strategies and predictability.<br>
                The persistent dry conditions prevailed from the late 1960s through 
                the mid-1990s. TRMM satellite data that was validated with a dense 
                gauge network showed that the region became markedly wetter in 
                1998. Relatively good rainfall continued through the next year. 
                As a whole rainfall of the last 6 years has been better than average, 
                but the &#8220;wet&#8221; conditions of the 1950s were not matched.</font><font color="#FFFFFF"><br>
                </font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="dherbes"></a>Regional 
                variability, local relative degradation; how to manage the scales 
                &nbsp;<a href="sahel_abstracts.html">&lt;back&gt; </a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">&laquo; 
                Desertification &raquo; has to be clearly distinguished from &laquo; 
                desert encroachment &raquo;, which is linked with the romantic 
                idea of a desert (erg and reg) encroaching irreversibly upon green 
                areas. Different thresholds of land and soils degradation have 
                been used to assess the lost of natural resources, and differ 
                considerably according to the idea of &laquo; irreversibility 
                &raquo; of the ultimate stage of degradation (which is the &laquo; 
                desertification &raquo; on a 25 years basis). We have no evidence 
                to say that the drought period has ended, neither we can say that 
                there is a global trend towards a drier climate since the last 
                century. So that the &laquo; greening Sahel &raquo;, following 
                the &laquo; yellowing Sahel &raquo; of the 70&#8217;s is just 
                an expression of this climate variability : the desert did not 
                (already) encroached upon the arid Sub-Saharian regions.<br>
                Are land use changes (towards less range pastures, more fields 
                and fallow fields, less time of fallowing, etc) responsible or 
                not for soil and land degradation cannot be assessed just through 
                a global survey at regional scale: the degradation (loss of soil 
                material, decreasing in production) depends notably upon the way 
                populations are using their space and resources (human density, 
                technology, etc.).<br>
                Examples from North Saharian countries, where animal pressure 
                increased during the drought period, due sometimes to national 
                actions taken to mitigate the effect of the drought, show that 
                we have to differentiate between &laquo; land degradation and/or 
                desertification &raquo; (which correspond to the loss of production 
                capability) and &laquo; resources degradation &raquo;, which express 
                a decreasing in man-useful resources.<br>
                Combining bio-physical and socio-economical assessment and monitoring, 
                combining functional models at local scale and structural monitoring 
                at national or regional scale, could help understanding the trends 
                in desertification. These are the objectives of the ROSELT/OSS 
                programme.</font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><strong><a name="sadio"></a>Environmental 
                and land cover changes in the Sahel region: lessons learned, Challenges 
                and</strong> <strong>priority actions <a href="sahel_abstracts.html">&nbsp;&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">During 
                the last three decades the Sahel region has been confronted with 
                various forms of environmental and ecological degradation due 
                to climate change and anthropogenic factors. These changes have 
                been described as the most important that the region had ever 
                faced. Recent studies and analysis show spatial and temporal patterns 
                changes and variability in the landscape features, tree-crop patterns 
                and forest cover, with severe degradation of soils and fragile 
                ecosystems.<br>
                However, their impacts could have been mitigated or even reversed 
                through conducive policies and concerted and collaborative efforts 
                with focus on priority areas where the conservation and rehabilitation 
                of fragile lands could be the most cost effective.<br>
                The FAO LADA team is carrying out, since 2002, studies focused 
                on the assessment of the status and trends of these changes, including 
                their impacts on livelihoods and identification of hotspots. LADA 
                work aims to generate up-to-date information related to ecological 
                and environmental changes, including economical, social and technical 
                aspects, traditional knowledge and practices on land management 
                which have occurred in drylands during these last decades.<br>
                The principle objective of the LADA project is to develop methods 
                and tools to assess and quantify the nature, extent, severity 
                and impacts of land degradation on ecosystems, watersheds and 
                river basins, carbon storage and biological diversity in drylands 
                at a range of spatial and temporal scales. <br>
                The project will also build national, regional and global assessment 
                capacities to enable the design and planning of interventions 
                to mitigate land degradation and establish sustainable land use 
                and management practices. </font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif"><strong><a name="kignaman"></a>Mitigation 
                of Impacts of Changes in Sahel &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">In 
                the frame of the partnership of weather, climate and environment 
                for development, meteorological applications usefully contribute 
                to mitigate the impacts of climate variability and changes in 
                Sahel.</font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">For 
                this purpose, the products of seasonal and intra-seasonal climate 
                forecast disseminated to end-users (rural communities and others) 
                by RANET multi-media system are currently usefully used in Niger 
                and Mali.</font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">By 
                seasonal and intra-seasonal climate prediction process forecasts, 
                outlooks and climate summary are produced to predict and monitor 
                early or late onset or withdrawal of rainfall, the dry or set 
                spells and outlook of the rainy season. This information is disseminated 
                in due time to end-users to enable them to better manage their 
                socio-economic activities.</font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">These 
                tailored products are carried out through two specific programs 
                on these matters by ACMAD in collaboration with its partners (National 
                Meteorological Services, sub-regional and international specialized 
                center). The interdisciplinary teams use them on the ground.</font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">So 
                for the benefit of Sahelian population the program on seasonal 
                and intra-seasonal climate prediction and the program on dissemination 
                of the products of meteorological application to rural communities 
                in their mother tongue are providing useful tools. These programs 
                should be strengthened and generalized in the Sahel.</font></p>
              <hr>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif"><a name="gregorio"></a><strong>A 
                new land cover classification system for desertification assessment, 
                mapping and monitoring &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" face="Arial, Helvetica, sans-serif">To 
                date there is no consensus concerning the definition of desertification 
                and as such there is no agreement regarding the current status 
                of desertification in the world as a whole or in its various areas. 
                Lack of consensus is mainly due to the fact that the proposed 
                definitions have no measurable parameters for desertification 
                assessment and mapping. In spite of lack of consensus on the definition 
                of desertification, it is generally recognized that desertification 
                is a marked decline or total loss of the potential ability of 
                the ecosystem in dry lands to sustain the biological productivity 
                of land. According to the World Bank definition, desertification 
                is a process of sustained land (soil and vegetation) degradation 
                in arid, semi-arid and dry sub-humid areas, caused at least partly 
                by man. It reduces production potential to an extent that can 
                neither be readily reversed by removing the cause, nor easily 
                reclaimed without substantial investment (World Bank, 1988). Many 
                studies have shown that changes in vegetation/land cover and land 
                use patterns form important criteria in land degradation/desertification 
                assessment, mapping and monitoring. It has further been demonstrated 
                that changes in land cover over time can be monitored effectively 
                using remotely sensed satellite data. However, due to the existence 
                of numerous and inconsistent land cover classification systems, 
                it is not possible to optimally use new or existing land cover 
                data in land degradation/desertification assessment and monitoring 
                and in planning of sustainable land use systems. To address this 
                problem, there is a need to come up with an internationally accepted 
                land cover classification system. This is particularly important 
                due to increasing availability of vast amount of remotely sensed 
                land cover data that is collected from earth observation satellites 
                on a regular basis. The Food and Agriculture Organisation of the 
                United Nations (FAO)/United Nations Environmental Program (UNEP) 
                Land Cover Classification System (LCCS), which attempts to address 
                this problem, is briefly discussed in this paper as well as its 
                possible use in land degradation/desertification assessment, mapping 
                and monitoring.</font></p>
              <hr>
              <p><font color="#FFFFFF" face="Arial, Helvetica, sans-serif"><a name="ahmed"></a><strong>The 
                utilization of geoinformation technology for agroenvironmental 
                applications in Egypt &nbsp;<a href="sahel_abstracts.html">&lt;back&gt;</a></strong></font></p>
              <p align="justify"><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif">Remote 
                sensing can provide valuable and timely information about natural 
                resources and environment which are very important for sustainable 
                development. However, in developing countries, the utilization 
                of such advanced technologies differs from one country to another. 
                Egypt, as a developing country, has experience in the utilization 
                of earth observation satellites and aircraft remote sensing data 
                in soil mapping as well as assessment of land degradation.<br>
                Agriculture in Egypt depends mainly on artificial irrigation, 
                which has long been practiced since the pre- historic times by 
                the Egyptians, and still used today in nearly the same manner. 
                The main source of irrigation water in Egypt is the Nile water. 
                Despite a number of projects to regulate the Nile having been 
                implemented, much of the Nile water is still in use in a non- 
                scientific way with an efficiency of irrigation of less than 50% 
                and salinization as a consequence. The change from the unwise 
                use of irrigation water to the exactly calculated amounts of different 
                crops requirement of water will save a great amount of water besides 
                conserving soils from rendering saline. <br>
                In all the cultivated areas the natural vegetation has been degraded 
                as a result of man&#8217;s activities or has been completely removed. 
                Agriculture has long been practiced in the Nile Delta by the ancient 
                Egyptians, and so natural vegetation can only be found in the 
                northern part of the Delta and the desert. The rest of the Delta 
                and Wadies are grown with different economic crops in a recurrent 
                succession (grain crops, fiber crops, legumes, sugar cane ... 
                etc.). </font><font color="#FFFFFF" size="3" face="Arial, Helvetica, sans-serif"><br>
                <br>
                </font> </p>
            </blockquote></td>
        </tr>
        <tr> 
          <td width="396" height="4" bgcolor="#FFFFFF"><img src="images/spacer.gif" width="396" height="4"></td>
        </tr>
      </table></td>
  </tr>
  <tr valign="top"> 
    <td width="800" bgcolor="#507799"> <div align="center"></div>
      <p align="center"><font color="#FFFFFF" size="2" face="Arial, Helvetica, sans-serif"><strong><br>
        Sahel Workshop Contact:</strong> <br>
  Stefanie Herrmann, ICRSE Workshop Secretariat<br>
        <a href="mailto:[email protected]">[email protected]</a> -- (520) 626-8064 Voice -- (520) 621-3816 FAX</font><br>
        <br>
      </p></td>
  </tr>
</table>
<table width="800" border="0" cellpadding="0" cellspacing="0">
  <tr bgcolor="#FFFFFF"> 
    <td colspan="5" height="4"><img src="images/spacer.gif" width="800" height="1"></td>
  </tr>
  <tr> 
    <td width="264" bgcolor="#829db6"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"><strong>Food
            &amp; Agriculture Organization<br>
            of the United Nations<br>
    </strong></font></div></td>
    <td width="4" bgcolor="#829db6">&nbsp;</td>
    <td width="264" bgcolor="#829db6"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"><strong>United
            Nations Convention <br>
        to Combat Desertification
    </strong></font></div></td>
    <td width="4" bgcolor="#829db6">&nbsp;</td>
    <td width="264" bgcolor="#829db6"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"><strong>United
            Nations <br>
        Environment Programme</strong></font></div></td>
  </tr>
  <tr> 
    <td colspan="5"><img src="images/spacer.gif" width="800" height="4"></td>
  </tr>
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    <td width="264" height="120"><div align="center"><a href="http://www.fao.org"><img src="images/fao_logo.jpg" alt="FAO" width="121" height="117" border="0"></a></div></td>
    <td height="120"><img src="images/spacer.gif" width="4" height="100"></td>
    <td height="120"><div align="center"><a href="http://www.unccd.int"><img src="images/unccd_logo.gif" alt="UNCCD" width="139" height="111" border="0"></a></div></td>
    <td height="120"><img src="images/spacer.gif" width="4" height="100"></td>
    <td height="120"><div align="center"><a href="http://www.unep.org"><img src="images/unep-logo-bl.gif" alt="UNEP" width="90" height="107" border="0"></a></div></td>
  </tr>
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