Your search found 9 records
1 de Condappa, D.; Chaponniere, Anne; Andah, W.; Lemoalle, J. 2008. Application of WEAP in the Volta Basin to model water allocation to the Akosombo Hydropower Scheme under different scenarios. In Humphreys, E.; Bayot, R. S.; van Brakel, M.; Gichuki, F.; Svendsen, M.; Wester, P.; Huber-Lee, A.; Cook, S. Douthwaite, B.; Hoanh, Chu Thai; Johnson, N.; Nguyen-Khoa, Sophie; Vidal, A.; MacIntyre, I.; MacIntyre, R. (Eds.). Fighting poverty through sustainable water use: proceedings of the CGIAR Challenge Program on Water and Food, 2nd International Forum on Water and Food, Addis Ababa, Ethiopia, 10-14 November 2008. Vol.3. Water benefits sharing for poverty alleviation and conflict management; Drivers and processes of change. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food. pp.11-14.
River basin management ; Hydrology ; Simulation models ; Water allocation ; Water power ; Irrigation water ; Dams ; Reservoirs / Ghana / Burkina Faso / Benin / Ivory Coast / Mali / Volta River Basin
(Location: IWMI HQ Call no: IWMI 333.91 G000 HUM Record No: H041846)
http://cgspace.cgiar.org/bitstream/handle/10568/3708/IFWF2_proceedings_Volume%20III.pdf?sequence=1
https://vlibrary.iwmi.org/pdf/H041846.pdf
https://vlibrary.iwmi.org/pdf/H041846.pdf
(0.32 MB)
2 Kirby, M.; de Condappa, D.; Mainuddin, M.; Eastham, J.; Thomas, M. 2010. Water-use accounts in CPWF basins: simple water-use accounting of the Volta Basin. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food (CPWF). 27p. (CPWF Working Paper: Basin Focal Project Series BFP004)
River basins ; Water use ; Land use ; Simulation models ; Hydrology / West Africa / Volta River Basin / Oti Sub Basin
(Location: IWMI HQ Call no: e-copy only Record No: H042842)
https://cgspace.cgiar.org/bitstream/handle/10568/10192/CPWF_BFP_WP_04.pdf?sequence=3
https://vlibrary.iwmi.org/pdf/H042842.pdf
https://vlibrary.iwmi.org/pdf/H042842.pdf
(1.02 MB) (1.02 MB)
This paper applies the principals of water-use accounts developed in the first of the series, to the Volta River Basin in West Africa. The Volta Basin covers six countries, with 85% of its area in Ghana and Burkina Faso. The three main tributaries, the Black Volta, the White Volta, and the Oti Rivers, all rise in Burkina Faso. The major feature of the Basin is the Akosombo Dam, which creates the world's largest man made lake. Precipitation increases strongly from the dry upper reaches in the north of the Basin towards the south, where the river discharges into the Gulf of Benin.
Runoff in three tributaries increases from 2-7% in the drier north to 12-26% in the higher-rainfall south. Grassland is the dominant land use throughout Basin ranging from 76% of the Delta catchment in the south to 98% of the Arly catchment with corresponding water use of 55% and 92% of the water used in each. Water used by rainfed agriculture ranges from 1 to 18% of the water available. Water used by irrigated agriculture is negligible.
Climate change, if it is assumed to increase annual precipitation by 7.5% will increase the frequency of spill from the Akosombo Dam and make more water available for hydropower generation. Increasing irrigation in the basins of all three tributaries to about one-third of the land identified by FAO as potentially irrigable gives lower flows and storage in the Dam.
Runoff in three tributaries increases from 2-7% in the drier north to 12-26% in the higher-rainfall south. Grassland is the dominant land use throughout Basin ranging from 76% of the Delta catchment in the south to 98% of the Arly catchment with corresponding water use of 55% and 92% of the water used in each. Water used by rainfed agriculture ranges from 1 to 18% of the water available. Water used by irrigated agriculture is negligible.
Climate change, if it is assumed to increase annual precipitation by 7.5% will increase the frequency of spill from the Akosombo Dam and make more water available for hydropower generation. Increasing irrigation in the basins of all three tributaries to about one-third of the land identified by FAO as potentially irrigable gives lower flows and storage in the Dam.
3 Sharma, Bharat R.; Amarasinghe, Upali; Cai, Xueliang; de Condappa, D.; Shah, Tushaar; Mukherji, Aditi; Bharati, Luna; Ambili, G.; Qureshi, Asad Sarwar; Pant, Dhruba; Xenarios, Stefanos; Singh, R.; Smakhtin, Vladimir. 2010. The Indus and the Ganges: river basins under extreme pressure. Water International, 35(5):493-521. (Special Issue on "Water, Food and Poverty in River Basins, Part 1" with contributions by IWMI authors). [doi: https://doi.org/10.1080/02508060.2010.512996]
River basins ; Groundwater management ; Electrical energy ; Water productivity ; Irrigation water ; Rice ; Wheat ; Evapotranspiration ; Cropping systems ; Water governance ; Watercourses ; Water conservation ; Water costs ; Water policy ; Multiple use ; Rural poverty / India / Pakistan / Nepal / Bangladesh / Indus River Basin / Ganges River Basin / Bhakra Irrigation System
(Location: IWMI HQ Call no: PER Record No: H043246)
http://www.tandfonline.com/doi/pdf/10.1080/02508060.2010.512996
https://vlibrary.iwmi.org/pdf/H043246.pdf
https://vlibrary.iwmi.org/pdf/H043246.pdf
(8.90 MB) (1.77MB)
The basins of the Indus and Ganges rivers cover 2.20 million km2 and are inhabited by more than a billion people. The region is under extreme pressures of population and poverty, unregulated utilization of the resources and low levels of productivity. The needs are: (1) development policies that are regionally differentiated to ensure resource sustainability and high productivity; (2) immediate development and implementation of policies for sound groundwater management and energy use; (3) improvement of the fragile food security and to broaden its base; and (4) policy changes to address land fragmentation and improved infrastructure. Meeting these needs will help to improve productivity, reduce rural poverty and improve overall human development.
4 Sharma, Bharat; de Condappa, D.; Bharati, Luna. 2011. Opportunities for harnessing the increased contribution of glacier and snowmelt flows in the Ganges Basin. Keynote speech presented at the International Conference on Cooperation on the Ganges: Barriers, Myths, and Opportunities, Institute of Water Policy, LKY School, National University of Singapore, Singapore, 13-14 November 2010. 16p.
River basins ; Climate change ; Glaciers ; Snowmelt ; Environmental temperature ; Upstream ; Downstream ; Mountains / South Asia / India / Nepal / Bangladesh / Ganges River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H044143)
(0.71 MB)
The topography of Ganges basin (GB) is much contrasted with upstream steep mountainous region of the Himalayas and downstream large fertile plains in eastern India and Bangladesh. The Himalays are partly covered by snow and glaciers that seasonally release water to the river network of GB and provide cushion against the annual fluctuations. The contribution from the glaciers to the streamflows is supposed to be significant although spatilly distributed quantification is unavailable. Moreover, there is uncertainity on the impact of climate change on glaciers and the resultant streamflows. We set up an application of the Water Evaluation and Planning (WEAP)model which contained an experimental glaciers module that accounts for snow and glaciers processes in the GB. The model also examined the possible impacts of an increase in temperature of +1, +2 or +3 degree Celsius over 20 years of the simulation period (1982-2002). The average annual stream flows in the GB that comes from melting of snow and ice in glaciated areas is significant (60-75%) in the Upper Ganga and in the Nepalese sub-basins. The share, however, reduces significantly further downstream, falling to about 19% at Farakka as flows from glaciated areas are diluted by streamflows generated by rainfall/ runoff processes. Climate change-induced rise in temperature logically increases the quantity of snow and ice that melts in glaciated areas , causing an augmentation of streamflows. However, this impact decreases from upstream ( +8% to +26% at Tehri Dam in Uttaranchal in India) to downstream (+1% to +4% at Farakka in West Bengal). Such increases in streamflows may create flood events more frequently or of higher magnitude in the Upper Ganga or in the mountainous sub-basins. In terms of water use, most of the extra water from glaciated areas do not flow when water is most required i.e. during the lean flow winter and early summer season. Potential strategy to exploit this additional water may include construction of new dams/ reservoir storages that could be used locally or within the transboundary agreements or to capture this extra water just at the end of the dry season (April-June) when flows from glaciated areas become noticeable. Enhancing the development of groundwater in the basin (from the present low level of ~ 30 per cent) through managed aquifer recharge and other suitable options shall be an equally viable option. The riparian states within India and India-Nepal- Bangladesh may harness this opportunity to alleviate physical water scarcity and transboundary water conflicts.
5 Sharma, Bharat R.; Cai, Xueliang; De Condappa, D.. 2011. Impact of climate change on water resources and agricultural production in the Indus basin, South Asia. [Abstract only]. In International Water Resources Association (IWRA). Book of abstracts: 14th World Water Congress, Porto de Galinhas, Pernambuco, Brazil, 25-29 September 2011. Urbana, IL, USA: International Water Resources Association (IWRA). pp.100.
Climate change ; Water resources ; Agricultural products ; River basins ; Simulation models ; Water conservation / South Asia / Pakistan / Indus Basin / Sukkur Barrage / Tarbela Dam
(Location: IWMI HQ Call no: e-copy only Record No: H044550)
(0.31 MB)
6 Sharma, Bharat; Amarasinghe, Upali; Cai, Xueliang; de Condappa, D.; Shah, Tushaar; Mukherji, Aditi; Bharati, Luna; Ambili, G. K.; Qureshi, Asad Sarwar; Pant, Dhruba; Xenarios, Stefanos; Singh, R.; Smakhtin, Vladimir. 2012. The Indus and the Ganges: river basins under extreme pressure. In Fisher, M.; Cook, Simon (Eds.). Water, food and poverty in river basins: defining the limits. London, UK: Routledge. pp.30-58.
River basins ; Water resources ; Population growth ; Poverty ; Social aspects ; Living conditions ; Water demand ; Water use ; Water productivity ; Water conservation ; Groundwater management ; Irrigation water ; Energy consumption ; Electricity ; Policy ; Water law ; Water governance ; Land use ; Land tenure ; Crop production ; Rice ; Wheat ; Economic aspects ; Case studies ; Farmers / India / Pakistan / Nepal / Indus River Basin / Ganges River Basin
(Location: IWMI HQ Call no: IWMI Record No: H044838)
(2.27 MB)
7 Lemoalle, J.; de Condappa, D.. 2012. Farming systems and food production in the Volta Basin. In Fisher, M.; Cook, Simon (Eds.). Water, food and poverty in river basins: defining the limits. London, UK: Routledge. pp.192-217.
River basins ; Farming systems ; Rainfed farming ; Population growth ; Food production ; Water management ; Water availability ; Rain ; Water use ; Crop yield ; Livestock ; Fisheries ; Poverty / West Africa / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H044844)
(1.84 MB)
8 Lemoalle, J.; de Condappa, D.. 2009. Water atlas of the Volta Basin. In English and French. [Atlas de l’eau du bassin de la Volta]. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food (CPWF); Marseille, France: Institut de Recherche pour le Developpement (IRD). 96p.
Water resources ; Groundwater ; Water budget ; Waterborne diseases ; Water availability ; Drinking water ; Water productivity ; Maps ; River basins ; Rain ; Flow discharge ; Wetlands ; Irrigation schemes ; Reservoirs ; Rainfed farming ; Cropping systems ; Fisheries ; Water power / Mali / Volta Basin
(Location: IWMI HQ Call no: 333.91 G000 LEM Record No: H046001)
(0.40 MB)
9 Sharma, Bharat R.; de Condappa, D.. 2013. Opportunities for harnessing the increased contribution of glacier and snowmelt flows in the Ganges basin. Water Policy, 15(S1):9-25. [doi: https://doi.org/10.2166/wp.2013.008]
Climate change ; Temperature ; Glaciers ; Snowmelt ; River basins ; Aquifers ; Dams ; Models ; Water scarcity ; Water resources ; Stream flow ; Upstream ; Downstream / India / Bangladesh / Ganges Basin
(Location: IWMI HQ Call no: PER Record No: H046155)
(0.51 MB)
The topography of the Ganges basin is highly variable, with the steep mountainous region of the Himalaya upstream and the large fertile plains in eastern India and Bangladesh downstream. The contribution from the glaciers to streamflows is supposed to be significant but there is uncertainty surrounding the impact of climate change on glaciers. An application of the Water Evaluation and Planning model was set up which contained an experimental glaciers module. The model also examined the possible impacts of an increase in temperature. The contribution from glaciated areas is significant (60–75%) in the Upper Ganges but reduces downstream, falling to about 19% at Farakka. Climate change-induced rise in temperature logically increases the quantity of snow and ice that melts in glaciated areas. However, this impact decreases from upstream (þ8% to þ26% at Tehri dam) to downstream (þ1% to þ4% at Farakka). Such increases in streamflows may create flood events more frequently, or of higher magnitude, in the upper reaches. Potential strategies to exploit this additional water may include the construction of new dams/reservoir storage and the development of groundwater in the basin through managed aquifer recharge. The riparian states of India, Nepal and Bangladesh could harness this opportunity to alleviate physical water scarcity and improve productivity.
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