Your search found 53 records
1 Rebelo, Lisa-Maria; Finlayson, Max; Nagabhatla, Nidhi; Zomer, Robert. 2006. Capacity building for multiple scale wetland inventory, mapping and change analysis. In Proceedings, GlobWetland: Looking at Wetlands from Space, Frascati, Italy, 19-20 October 2006. 6p.
(Location: IWMI-HQ Call no: IWMI 333.918 G000 REB Record No: H039730)
2 Rebelo, Lisa-Maria; McCartney, Matthew; Finlayson, Max. 2007. Characterization of two large inland wetlands in Southern Africa. WARFSA/WaterNet Symposium, Lusaka, Zambia, 31 October - 2 November 2007. 8p.
Wetlands ; Ecosystems ; Vegetation ; Land cover ; Remote sensing ; GIS / Southern Africa / Africa South of Sahara / Malawi / Zambia / Lake Chilwa / Lukanga Swamp
(Location: IWMI HQ Call no: IWMI 333.918 G154 REB Record No: H040789)
As wetlands in sub-Saharan Africa often play a vital role in supporting the livelihood and well-being of rural populations their sustainable management is critical. In many instances however, sustainable management of these ecosystems is hindered by a lack of information. For large, inaccessible wetlands Earth Observation data may provide the only practical means of obtaining this information, especially for mapping and monitoring spatial and temporal characteristics. These issues have been addressed at priority wetland sites, vulnerable to both climatic variability and agricultural activities (both subsistence and commercial) n eight countries in southern Africa; here we report outcomes from two of the larger wetlands where increased population pressure and exploitation of resources within the wetlands and the surrounding catchments are leading to serious degradation and loss of biodiversity and inter-linked ecosystem services. A combination of GPS, GIS, aerial photographs and satellite remote sensing data at multiple scales, as well as ground based information, were used to describe the ecological characteristics of these sites, and to map the spatial distribution of the major land cover types. The maps provide information which can be used to assist managers in making decisions about future land uses in wetlands that are intensively used for agriculture and fisheries. The land cover and land use analyses will also provide the basis for livelihood assessments and management interventions.
3 Rebelo, Lisa-Maria; Finlayson, C. Max; Nagabhatla, Nidhi. 2009. Remote sensing and GIS for wetland inventory, mapping and change analysis. Journal of Environmental Management, 90:2144-2153. [doi: https://doi.org/10.1016/j.jenvman.2007.06.027]
Remote sensing ; GIS ; Wetlands ; Surveys ; Mapping ; Case studies ; Capacity building ; Stakeholders / Sri Lanka / Southern Africa / Malawi / Muthurajawela Marsh / Negombo Lagoon / Lake Chilwa
(Location: IWMI HQ Call no: e-copy only Record No: H042129)
(0.93 MB)
A multiple purpose wetland inventory is being developed and promoted through partnerships and specific analyses at different scales in response to past uncertainties and gaps in inventory coverage. A partnership approach is being promoted through the Ramsar Convention on Wetlands to enable a global inventory database to be compiled from individual projects and analyses using remote sensing and GIS. Individual projects that are currently part of this global effort are described. They include an analysis of the Ramsar sites’ database to map the distribution of Ramsar sites across global ecoregions and to identify regions and wetland types that are under-represented in the database. Given the extent of wetland degradation globally, largely due to agricultural activities, specific attention is directed towards the usefulness of Earth Observation in providing information that can be used to more effectively manage wetlands. As an example, a further project using satellite data and GIS to quantify the condition of wetlands along the western coastline of Sri Lanka is described and trends in land use due to changes in agriculture, sedimentation and settlement patterns are outlined. At a regional scale, a project to map and assess, using remote sensing, individual wetlands used for agriculture in eight countries in southern Africa is also described. Land cover and the extent of inundation at each site is being determined from a multi-temporal data set of images as a base for further assessment of land use change. Integrated fully within these analyses is the development of local capacity to plan and undertake such analyses and in particular to relate the outcomes to wetland management and to compile data on the distribution, extent and condition of wetlands globally.
4 Rebelo, Lisa-Maria; McCartney, Matthew; Finlayson, C. Max. 2009. Wetlands of Sub-Saharan Africa: distribution and contribution of agriculture to livelihoods. Wetlands Ecology and Management, 18(5):557-572. [doi: https://doi.org/10.1007/s11273-009-9142-x]
Wetlands ; Ecosystems ; Cultivation ; Livestock ; Fisheries ; Natural resources ; Households ; Food security ; Sustainability ; Villages ; Governance ; Case studies / Africa / Africa South of Sahara / Tanzania / Zanzibar / Kilombero Valley
(Location: IWMI HQ Call no: e-copy only Record No: H042239)
(0.45 MB)
Wetlands contribute in diverse ways to the livelihoods of millions of people in Sub-Saharan Africa. In many places they are inextricably linked to cropping and livestock management systems. At the same time, increasing population in conjunction with efforts to increase food security is escalating pressure to expand agriculture within wetlands. The environmental impact of wetland agriculture can, however, have profound social and economic repercussions for people dependent on ecosystem services other than those provided directly by agriculture. Currently, the basis for making decisions about the extent to which wetlands can be sustainably used for agriculture is weak. This paper provides an overview of wetland distribution, type and condition across Sub-Saharan Africa. Findings from an investigation of wetland use conducted in Tanzania are presented. These highlight the reliance of communities on both wetland agriculture and natural resources, and show that the nature of household dependence varies significantly from place to place and as socio-economic status changes. Consequently, incentives to manage wetland resources will differ markedly, not only from one location to another, but also across socio-economic groups within the same community. This complexity highlights the need for critical analysis of the social and economic factors that underpin the dynamics of wetland resource use in the development of sustainable management plans.
5 MacKay, H.; Finlayson, Max; Fernandez-Prieto, D.; Davidson, N.; Pritchard, D.; Rebelo, Lisa -Maria. 2009. The role of Earth Observation (EO) technologies in supporting implementation of the Ramsar Convention on Wetlands. Journal of Environmental Management, 90:2234-2242. [doi: https://doi.org/10.1016/j.jenvman.2008.01.019]
(Location: IWMI HQ Call no: e-copy only Record No: H042525)
(0.33 MB)
Over one hundred wetland specialists and Earth Observation experts from around the world gathered at the European Space Agency’s ‘GlobWetland Symposium: Looking at wetlands from space’ in Frascati, Italy, from 19 to 20 October, 2006. The aim of the Symposium was to stimulate discussion between the two communities by reviewing the latest developments in Earth Observation (EO) for the inventory, assessment and monitoring of wetlands and identify key scientific, technical and policy-relevant challenges for the future. The results provide an overview of the key areas of current research in the use of EO for mapping and managing wetlands, while also pointing out gaps that could hinder global inventory, assessment and monitoring of wetlands. This paper provides a summary of the main outputs with a focus on the role of EO technologies in supporting the implementation of the Ramsar Convention on Wetlands. The summary contains a qualitative analysis of the state of the art and considers possible directions and priorities for future research, development and application of EO-based technologies in wetland management. In this context we: 1) highlight those applications where EO technologies are ready for wider uptake by wetland managers, and provide suggestions for supporting such uptake; 2) indicate where EO technologies and applications currently in the research and development stages could potentially be useful in wetland management; and 3) provide recommendations for new research and development of EO technologies, that can be utilized to address aspects of wetland management not covered by the range of current EO applications.
6 Rebelo, Lisa-Maria. 2009. Characterisation of inland wetlands in Africa: Kyoto and Carbon Science Report - Phase 1. Tokyo, Japan: Japan Aerospace Exploration Agency (JAXA) 6p.
Wetlands ; Lakes ; Remote sensing ; Flooding ; Vegetation / Africa / Malawi / Mozambique / Lake Chilwa / Lake Urema
(Location: IWMI HQ Call no: e-copy only Record No: H042527)
http://www.eorc.jaxa.jp/ALOS/en/kyoto/phase_1/KC-Phase1-report_Rebelo.pdf
https://vlibrary.iwmi.org/pdf/H042527.pdf
https://vlibrary.iwmi.org/pdf/H042527.pdf
(1.53 MB) (1.53MB)
Inland wetlands occur extensively across Sub-Saharan Africa. These ecosystems typically play a vital role in supporting rural populations and their sustainable management is thus critical. In order to prevent depletion of resources and ecosystem services provided by these wetlands, a balance is required between ecological and socio-economic factors. The sustainable management of wetlands requires information describing these ecosystems at multiple spatial and temporal scales. However, many southern and eastern African countries lack regional baseline information on the temporal extent, distribution and characteristics of wetlands. PALSAR data provides invaluable information related to the flooding patterns and vegetation characteristics of these wetlands, and is being used to document and characterise specific sites within the region which have been identified due to their vulnerability to both climatic variability and agricultural activities. The information derived from the PALSAR data is needed to assist managers in making decisions about future land uses in wetlands that are intensively used for agriculture and fisheries, and which are an important natural resource for local communities.
7 Rebelo, Lisa-Maria. 2009. Mapping inland wetlands in Africa using long waveband radar: the ALOS Kyoto and Carbon Initiative. Paper presented at the 10th WaterNet/WARFSA/GWP-SA symposium, Entebbe, Uganda, 28-30 October 2009. 8p.
Wetlands ; Flood plains ; River basin management ; Mapping / Africa South of Sahara / Nile River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H042526)
(0.45 MB)
Throughout Sub-Saharan Africa, floodplains and wetlands are extensive. These ecosystems depend on frequent flooding. Many hydrological interventions either already exist within these basins, or are being planned to increase economic benefits and food security. However, these interventions will not be without consequences and both the costs and benefits need to be carefully evaluated. One likely consequence of increased flow regulation is reduced downstream flooding. The wetland ecosystems typically play a vital role in supporting rural populations and their sustainable management is thus critical. In order to prevent depletion of resources and ecosystem services provided by these wetlands, a balance is required between ecological and socio-economic factors. The sustainable management of wetlands requires information describing these ecosystems at multiple spatial and temporal scales. However, many African countries lack regional baseline information on the temporal extent, distribution and characteristics of wetlands. The ALOS Kyoto and Carbon Initiative is an international collaborative project led by the Japanese Aerospace Exploration Agency (JAXA) which has been set up to support the data and information needs posed by international environmental conventions, carbon cycle scientists; and environmental conservation programs. This paper reports on analysis planned under the Wetland Theme of this Initiative, for the Upper Nile Basin.
8 Rebelo, Lisa-Maria; Finlayson, M. 2010. Characterization of inland wetlands in Africa: K&C science report – phase 1. In Japan Aerospace Exploration Agency (JAXA), Earth Observation Research Center (EORC). The ALOS Kyoto & Carbon Initiative Science Team Reports, Phase 1 (2006-2008): wetlands theme reports. Tsukuba-shi, Japan: Japan Aerospace Exploration Agency (JAXA), Earth Observation Research Center (EORC) pp.140-146.
Wetlands ; Mapping ; Ecosystems ; Flooding ; Hydrology ; Vegetation ; Lakes ; Remote sensing / Africa / Malawi / Mozambique / Lake Chilwa / Lake Urema
(Location: IWMI HQ Call no: 333.91 G100 JAP Record No: H042473)
http://www.eorc.jaxa.jp/ALOS/kyoto/ref/KC_Phase-1_ScienceTeamReports_JAXA-EORC_NDX-100003.pdf
https://vlibrary.iwmi.org/pdf/H042473.pdf
https://vlibrary.iwmi.org/pdf/H042473.pdf
(0.67 MB) (34.49 MB)
Inland wetlands occur extensively across Sub-Saharan Africa. These ecosystems typically play a vital role in supporting rural populations and their sustainable management is thus critical. In order to prevent depletion of resources and ecosystem services provided by these wetlands, a balance is required between ecological and socio-economic factors. The sustainable management of wetlands requires information describing these ecosystems at multiple spatial and temporal scales. However, many southern and eastern African countries lack regional baseline information on the temporal extent, distribution and characteristics of wetlands. PALSAR data provides invaluable information related to the flooding patterns and vegetation characteristics of these wetlands, and is being used to document and characterise specific sites within the region which have been identified due to their vulnerability to both climatic variability and agricultural activities. The information derived from the PALSAR data is needed to assist managers in making decisions about future land uses in wetlands that are intensively used for agriculture and fisheries, and which are an important natural resource for local communities.
9 Rebelo, Lisa-Maria. 2010. Mapping of threatened wetlands along the Nile River. In Rosenqvist, A.; Shimada, M. (Eds.). Global environmental monitoring by ALOS PALSAR: science results from the ALOS Kyoto and Carbon Initiative. Tsukuba, Ibaraki, Japan: Japan Aerospace Expoloration Agency. pp.58-59.
Wetlands ; River basins ; Mapping ; Satellite imagery / Africa / Sudan / Nile River / Jonglei Canal / Sudd Wetland
(Location: IWMI HQ Call no: e-copy only Record No: H043188)
http://www.eorc.jaxa.jp/ALOS/en/kyoto/ref/KC-Booklet_2010_comp.pdf
https://vlibrary.iwmi.org/pdf/H043188.pdf
https://vlibrary.iwmi.org/pdf/H043188.pdf
10 Rebelo, Lisa-Maria. 2010. Mapping wetlands in Africa to improve understanding of wetland-livelihood interactions Lake Urema, Mozambique. In Rosenqvist, A.; Shimada, M. (Eds.). Global environmental monitoring by ALOS PALSAR: science results from the ALOS Kyoto and Carbon Initiative. Tsukuba, Ibaraki, Japan: Japan Aerospace Expoloration Agency. pp.60-61.
Wetlands ; Lakes ; Mapping ; Satellite imagery ; Ecosystems ; Floodplains / Africa / Mozambique / Lake Urema
(Location: IWMI HQ Call no: e-copy only Record No: H043189)
http://www.eorc.jaxa.jp/ALOS/en/kyoto/ref/KC-Booklet_2010_comp.pdf
https://vlibrary.iwmi.org/pdf/H043189.pdf
https://vlibrary.iwmi.org/pdf/H043189.pdf
11 Awulachew, Seleshi Bekele; Rebelo, Lisa-Maria; Molden, David. 2010. The Nile Basin: tapping the unmet agricultural potential of Nile waters. Water International, 35(5):623-654. (Special Issue on "Water, Food and Poverty in River Basins, Part 1" with contributions by IWMI authors). [doi: https://doi.org/10.1080/02508060.2010.513091]
River basins ; Water productivity ; Water availability ; Agriculture ; Fisheries ; Livestock ; Poverty / Africa / Nile River Basin / Lake Victoria / Gezira Scheme / Aswan High Dam
(Location: IWMI HQ Call no: PER Record No: H043336)
(1.92 MB)
This paper provides an overview of poverty levels, hydrology, agricultural production systems and water productivity in the Nile Basin. There are opportunities to manage water better in the basin for use in agriculture to improve food security, livelihoods and economic growth by taking into account not only the water in the river, but also by improving management of the rain water. Crops, livestock, fisheries and aquaculture have long been important in the Nile but do not feature in the water discourse.
12 Rebelo, Lisa-Maria. 2010. Eco-hydrological characterization of inland wetlands in Africa using L-Band SAR. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 3(4):554-559. [doi: https://doi.org/10.1109/JSTARS.2010.2070060]
Ecology ; Hydrology ; Wetlands ; Ecosystems ; Remote sensing ; Maps ; Vegetation ; Monitoring / Africa / Africa South of Sahara / Malawi / Mozambique / Lake Chilwa / Lake Urema
(Location: IWMI HQ Record No: H043505)
(1.22 MB)
Maps describing the eco-hydrology of inland wetland systems in Africa are needed to identify and implement appropriate adaptive management plans related to land use and land cover. Many African countries lack regional baseline information on the temporal extent, distribution and characteristics of wetlands. This information is provided here in the form of maps which characterize two wetland sites of international importance in Malawi and Mozambique. Multi-temporal L-band Synthetic Aperture Radar (SAR) datasets are combined with Landsat Thematic Mapper and ASTER images, digital elevation models, and vegetation species data to provide information on wetland ecology and hydrology. These data were used as input to a hybrid, Decision Tree classifier and a Principal Components Analysis classification approach to produce maps depicting the spatial distribution of vegetation species and characterizing the wetland dynamics. The maps exhibit classification accuracies of 89% and 84% for the two sites respectively. The L-band SAR datasets have proved to be an essential information source in the production of these maps due to i) frequent cloud cover/smoke which reduces the temporal coverage of optical data, and ii) a systematic observation strategy and frequent image acquisition which enables characterization of the flood dynamics at a high temporal resolution.
13 Barry, Boubacar; Kortatsi, B.; Forkuor, G.; Gumma, M. K.; Namara, Regassa E.; Rebelo, Lisa-Maria; van den Berg, J.; Laube, W. 2010. Shallow groundwater in the Atankwidi Catchment of the White Volta Basin: current status and future sustainability. Colombo, Sri Lanka: International Water Management Institute (IWMI). 23p. (IWMI Research Report 139) [doi: https://doi.org/10.5337/2010.234]
Groundwater irrigation ; Aquifers ; River basins ; Catchment areas ; Irrigation practices ; Remote sensing ; Mapping / Ghana / Atankwidi Catchment / White Volta River Basin
(Location: IWMI HQ Call no: IWMI 333.9104 G200 BAR Record No: H043521)
(1.39 MB)
The Atankwidi Catchment, which lies in the White Volta Basin in West Africa, is intensively cultivated by locals for economic gains. During dry seasons, farmers irrigate their crops, chiefly tomatoes, using shallow groundwater harvested from shallow ponds they dig using simple tools like an axe, hoe, bucket and bowls. Recent expansion in cultivated areas has brought to the fore the need to estimate the volume of shallow groundwater stored in the catchment’s underlying aquifer and to what extent it can sustain the incremental growth in irrigated areas.
14 McCartney, Matthew; Rebelo, Lisa-Maria; Senaratna Sellamuttu, Sonali; de Silva, Sanjiv. 2010. Wetlands, agriculture and poverty reduction. Colombo, Sri Lanka: International Water Management Institute (IWMI). 31p. (IWMI Research Report 137) [doi: https://doi.org/10.5337/2010.230]
(Location: IWMI HQ Call no: IWMI 333.91 G000 MCC Record No: H043566)
(1.15 MB)
In many places, growing population, in conjunction with efforts to increase food security, is escalating pressure to expand agriculture within wetlands. The environmental impact of wetland agriculture can have profound social and economic repercussions for people dependent on ecosystem services other than those provided directly by agriculture. If wetlands are not used sustainably, the functions which support agriculture, as well as other food security and ecosystem services, are undermined. This report synthesizes findings from multidisciplinary studies conducted into sustainable wetland agriculture by IWMI and partners in Africa and Asia. It highlights the value of wetland agriculture for poverty reduction as well as the need for more systematic planning that takes into account trade-offs in the multiple services that wetlands provide.
15 Rebelo, Lisa-Maria; McCartney, Matthew; Finlayson, M. C. 2011. The application of geospatial analyses to support an integrated study into the ecological character and sustainable use of Lake Chilwa. Journal of Great Lakes Research, 37(Supplement 1):83-92. [doi: https://doi.org/ 10.1016/j.jglr.2010.05.004]
(Location: IWMI HQ Call no: e-copy only Record No: H043687)
(1.76 MB)
Wetlands, which occupy a considerable proportion of Malawi, are an important resource for the rural-poor. In regions of low and erratic rainfall, they provide important opportunities for agriculture and fisheries and are often vital for food security. However, overutilization and some farming practices can result in environmental degradation and the loss of valuable ecosystem services. The Lake Chilwa wetland, a complex aquatic ecosystem comprising a shallow open water lake surrounded by marsh and floodplain grassland, is one of the most important wetlands in Malawi. Most of the 1 million people who live in the vicinity of the lake derive their livelihoods from the wetland. Increases in population in recent decades have increased the pressures on the wetland. In light of continued population growth, it is anticipated that some levels of resource use may be difficult to sustain in the long-term. Consequently, planning the use of wetland resources is a priority if the diverse benefits that local communities presently receive are to be sustained. Baseline wetland information is needed to determine appropriate sustainable management plans, as well as to identify limits to resilience. However, for many wetlands in southern and eastern Africa, these data are lacking, or not available to those who need them. This paper provides an overview of the distribution and characteristics of wetlands in Malawi. Using Lake Chilwa as an example, it illustrates how Earth Observation data, in combination with hydrometric and botanical data, can be used to provide information crucial for sustainable wetland management.
16 Rebelo, Lisa-Maria; McCartney, Matthew. 2011. Situation analysis for Africa. In Darwall, W. R. T.; Smith, K. G.; Allen, D. J.; Holland, R. A.; Harrison, I. J.; Brooks, E. G. E. (Eds.). The diversity of life in African freshwaters: under water, under threat - an analysis of the status and distribution of freshwater species throughout mainland Africa. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources (IUCN). pp.13-26.
Freshwater ; Ecosystems ; Biodiversity ; Water pollution ; Dams ; Rivers ; Water transfer ; Population growth ; Fisheries / Africa
(Location: IWMI HQ Call no: e-copy only Record No: H043825)
(3.63 MB)
17 McCartney, Matthew; Morardet, S.; Rebelo, Lisa-Maria; Finlayson, C. M.; Masiyandima, M. 2011. A study of wetland hydrology and ecosystem service provision: GaMampa wetland, South Africa. Hydrological Sciences Journal, 56(8):1452-1466. [doi: https://doi.org/10.1080/02626667.2011.630319]
Wetlands ; Hydrology ; Ecosystems ; Flow ; Dry season ; Economic aspects ; Economic analysis ; Land cover / South Africa / GaMampa wetland / Mohlapitsi River / Olifants River
(Location: IWMI HQ Call no: e-copy only Record No: H044592)
(3.37 MB)
The GaMampa wetland, a palustrine wetland, comprises less than 1% of the catchment but is widely believed to make a significant contribution to dry-season river flow in the Mohlapitsi River, a tributary of the Olifants River, in South Africa. The contribution of the GaMampa wetland to dry-season flow in the Mohlapitsi River and the impact of increasing agriculture on its hydrological functioning were investigated. Economic analyses showed that the net financial value of the wetland was US$ 83,263 of which agriculture comprises 38%. Hydrological analyses indicated that the Mohlapitsi River contributes, on average, 16% of the dry-season flow in the Olifants River. However, the wetland contributes, at most, 12% to the increase in dry-season flow observed over the reach of the river in which the wetland is located. The remainder of the increase originates from groundwater flowing through the wetland. Furthermore, despite the conversion of 50% of the wetland to agriculture since 2001, there has been no statistically significant reduction in dry-season flow in the Mohlapitsi River. These results highlight the importance of understanding the nature of the full suite of services being provided by a wetland in order to make informed decisions for appropriate management.
18 McCartney, Matthew; Rebelo, Lisa-Maria; Mapedza, Everisto; de Silva, Sanjiv; Finlayson. C. M. 2011. The lukanga swamps: use, conflicts, and management. Journal of International Wildlife Law and Policy, 14(3-4):293-310.
Swamps ; Conflict ; Wetlands ; Ecosystems ; Catchment areas ; Natural resources ; Rivers ; Legal aspects ; Policy ; Wildlife ; Agriculture ; Fishing ; Social aspects / Zambia / Lukanga Swamps
(Location: IWMI HQ Call no: e-copy only Record No: H044595)
(0.43 MB)
19 Rebelo, Lisa-Maria; Senay, G. B.; McCartney, Matthew. 2012. Flood pulsing in the Sudd Wetland: analysis of seasonal variations in inundation and evaporation in South Sudan. Earth Interactions, 16(1):1-19. [doi: https://doi.org/10.1175/2011EI382.1]
Flooding ; Wetlands ; Ecosystems ; Biodiversity ; Seasonal variation ; Evaporation ; Evapotranspiration ; Remote sensing ; Vegetation ; Hydrological factors ; Catchment areas ; Desalinization ; Models / Sudan / Bahr el Jebel / Sudd Region / Lake Victoria / White Nile River / Nile River
(Location: IWMI HQ Call no: e-copy only Record No: H044750)
(1.98 MB)
Located on the Bahr el Jebel in South Sudan, the Sudd is one of the largest floodplain wetlands in the world. Seasonal nundation drives thehydrologic, geomorphological, and ecological processes, and the annual flood pulse is essential to the functioning of the Sudd. Despite the importance of the flood pulse, various hydrological interventions are planned upstream of the Sudd to increase economic benefits and food security. These will not be without consequences, in particular for wetlands where the biological productivity, biodiversity, and human livelihoods are dependent on the flood pulse and both the costs and benefits need to be carefully evaluated. Many African countries still lack regional baseline information on the temporal extent, distribution, and characteristics of wetlands, making it hard to assess the consequences of development interventions. Because of political instability in Sudan and the inaccessible nature of the Sudd, recent measurements of flooding and seasonal dynamics are inadequate. Analyses of multitemporal and multisensor remote sensing datasets are presented in this paper, in order to investigate and characterize flood pulsing within the Sudd wetland over a 12-month period. Wetland area has been mapped along with dominant components of open water and flooded vegetation at five time periods over a single year. The total area of flooding (both rain and river fed) over the 12 months was 41 334 km2, with 9176 km2 of this constituting the permanent wetland. Mean annual total evaporation is shown to be higher and with narrower distribution of values from areas of open water (1718 mm) than from flooded vegetation (1641 mm). Although the exact figures require validation against ground-based measurements, the results highlight the relative differences in inundation patterns and evaporation across the Sudd.
20 Awulachew, Seleshi Bekele; Rebelo, Lisa-Maria; Molden, David. 2012. The Nile Basin: tapping the unmet agricultural potential of Nile waters. In Fisher, M.; Cook, Simon (Eds.). Water, food and poverty in river basins: defining the limits. London, UK: Routledge. pp.160-191.
River basins ; Water management ; Rain water management ; Agricultural production ; Social aspects ; Living conditions ; Poverty ; Water availability ; Water productivity ; Water accounting ; Lakes ; Wetlands ; Food security ; Economic growth ; Crop production ; Livestock ; Fisheries ; Flow discharge ; Highlands ; Ecosystems ; Irrigation / Ethiopia / Sudan / Egypt / Lake Victoria / Sudd Wetland / Gezira Scheme
(Location: IWMI HQ Call no: IWMI Record No: H044843)
(2.42 MB)
This paper provides an overview of poverty levels, hydrology, agricultural production systems and water productivity in the Nile Basin. There are opportunities to manage water better in the basin for use in agriculture to improve food security, livelihoods and economic growth by taking into account not only the water in the river, but also by improving management of the rain water. Crops, livestock, fisheries and aquaculture have long been important in the Nile but do not feature in the water discourse.
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