Your search found 109 records
1 El-Assiouti, I. M.; Abou-Seida, M.; Dorrah, H. T. Present and future operation of the high Aswan dam and barrages in Egypt. Unknown. 14p.+ annex.
(Location: IWMI-HQ Call no: P 1533 Record No: H07033)
2 Miwa, H. 1993. Sand deposition near diversion dams in Indonesia. Journal of Irrigation Engineering and Rural Planning, 24:44-53.
(Location: IWMI-HQ Call no: PER Record No: H013189)
3 Esen, I. I.; Alhumoud, J. M.; Hannan, K. A. 2004. Energy loss at a drop structure with a step at the base. Water International, 29(4):523-529.
(Location: IWMI-HQ Call no: PER Record No: H036721)
4 McCartney, Matthew P.; Shiferaw, A.; Seleshi, Y. 2008. Estimating environmental flow requirements downstream of the Chara Chara weir on the Blue Nile River. In Abtew, W.; Melesse, A. M. (Eds.). Proceedings of the Workshop on Hydrology and Ecology of the Nile River Basin under Extreme Conditions, Addis Ababa, Ethiopia, 16-19 June 2008. Sandy, UT, USA: Aardvark Global Publishing. pp.57-75.
Water management ; River basin management ; Ecology ; Rivers ; Environmental flows ; Environmental effects ; Downstream ; Weirs ; Hydrology ; Models ; Ecosystems ; Water power / Africa / Ethiopia / Sudan / Blue Nile River / Abay River / Chara Chara Weir / Lake Tana
(Location: IWMI HQ Call no: IWMI 577.64 G100 MCC Record No: H041346)
(1.27 MB)
Over the last decade flow in the Abay River (i.e., the Blue Nile) has been modified by operation of the Chara Chara weir and diversions to the Tis Abay hydropower stations, located downstream of the rivers source, Lake Tana. The most conspicuous impact of these human interventions has been significantly reduced flows over the Tis Issat Falls. This paper presents the findings of a hydrological study conducted to estimate environmental flow requirements downstream of the weir. The South African desktop reserve model was used to determine both high and low flow requirements in the reach containing the Falls. The results indicate that to maintain the basic ecological functioning in this reach requires an average annual allocation of 862 Mm3 (i.e. equivalent to 22% of the mean annual flow). Under natural conditions there was considerable seasonal variation, but the absolute minimum mean monthly allocation, even in dry years, should not be less than approximately 10 Mm3 (i.e. 3.7 m3s-1). These estimates make no allowance for maintaining the aesthetic quality of the Falls, which are popular with tourists. The study demonstrated that, in the absence of ecological information, hydrological indices can be used to provide a first estimate of environmental water requirements. However, to ensure proper management, much greater understanding of the relationships between flow and the ecological condition of the riverine ecosystem is needed.
5 Molle, Francois; Foran, T.; Kakonen, M. (Eds.) 2009. Contested waterscapes in the Mekong Region: hydropower, livelihoods and governance. London, UK: Earthscan. 426p.
Water resources development ; Hydroelectric schemes ; Dams ; River basins ; History ; Wetlands ; Models ; Fisheries ; Case studies ; Economic aspects ; Political aspects ; Decision making ; Environmental effects ; Downstream ; Irrigation programs ; Irrigation schemes ; Flood control ; Water governance / Southeast Asia / Cambodia / China / Laos / Burma / Myanmar / Thailand / Vietnam / Mekong Region / Kamchay Dam / Pak Mun Dam / Nam Theun Project / Salween River / Nam Songkhram Basin
(Location: IWMI HQ Call no: 333.91 G800 MOL Record No: H042351)
(0.00 MB)
6 Bantero, B.; Ayana, M.; Awulachew, Seleshi Bekele. 2010. Assessment of irrigation performance along the canal reach of community managed scheme in southern Ethiopia. Ethiopian Journal of Development Research, 32(1):81-106 (Special issue with contributions by IWMI authors).
Irrigation schemes ; Communal irrigation systems ; Irrigation canals ; Flow measurement ; Water distribution ; Performance evaluation ; Performance indexes ; Downstream ; Upstream ; Productivity / Ethiopia / Hare Irrigation Scheme / Chano Dorga / Chano Chalba / Kola Shara
(Location: IWMI HQ Call no: PER Record No: H043250)
(0.13 MB)
This paper presents the results of irrigation performance assessment made along the canal reaches of community-managed Hare irrigation scheme in Southern Ethiopia. Field measurement, interview, group discussion and measurement of water supply were undertaken, and output performance indicators were assessed. Measurements of cropping intensity, irrigation interval and productivity show that there is a distinct difference in performance along the main canal. Upstream water users always have easy access to water, higher annual income and resource base than those in midstream and downstream. Disparity among users occurs due to lack of functional institutions and poor conditions of water distribution systems.
7 Karimov, Akmal; Smakhtin, Vladimir; Aulchaev, T.; Borisov, V. 2010. Transformation of a negative impact of upstream irrigation and the benefits for downstream water users: an example of Ferghana Valley. In Russian. In Proceedings of the Republican Scientific Practical Conference on Efficient Agricultural Water Use and Tropical Issues in Land Reclamation, Tashkent, Uzbekistan, 10-11 November 2010. Tashkent, Uzbekistan: Ministry of Agriculture and Water Resources; Tashkent, Uzbekistan: International Water Management Institute; Tashkent, Uzbekistan: Scientific Information Center of Interstate Commission for Water Coordination (SANIIRI). pp.129-138.
(Location: IWMI HQ Call no: e-copy only Record No: H043571)
(2.80 MB)
8 Narain, S.; Babu, S. S. V.; Seth, B. L.; Chak, A.; Dixit, V. K. 2007. Sewage canal: how to clean The Yamuna. New Delhi, India: Centre for Science and Environment (CSE). 180p.
Waste management ; Sewage ; Rivers ; Pollution ; Action plans ; Upstream ; Downstream ; Wastewater ; Waste treatment ; Water quality ; Coliform bacteria / India / Yamuna River / New Delhi
(Location: IWMI HQ Call no: 628.3 G635 NAR Record No: H043793)
(0.54 MB)
9 Water Channel. 2011. Water management in motion: six thematic DVDs including 60 videos, tutorials and key references. Wageningen, Netherlands: Water Channel. 6 DVDs.
Water management ; Groundwater management ; Upstream ; Downstream ; Conflict ; Rain ; Water harvesting ; Drinking water ; Aquifers ; Wells ; Groundwater recharge ; Greenhouse effect ; Climate change ; Adaptation ; Towns ; Erosion ; Health hazards ; Sanitation ; Malaria ; Deserts ; Mangroves ; Crops ; Lakes ; Rivers ; Water pollution ; Water quality ; Wastewater treatment / India / Kenya / Nepal / Uganda / Bangladesh / New Zealand / Vietnam / USA / South Africa / Palestine / China / Philippines / Indus River / Mekong River / Karnataka Pradesh / Bangalore / Carteret Islands / Lake Tahoe / Niger Delta / Yamuna River / Green Lake / Lake Victoria
(Location: IWMI HQ Call no: DVD col Record No: H044070)
10 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.
11 Xenarios, Stefanos; Asante, F.; McCartney, Matthew. 2011. Economic efficiency of water storage options: an application of the approach to Ghana. Paper presented at the Third Ghana Water Forum (GWF-3) on Water and Sanitation Services Delivery in a Rapidly Changing Urban Environment, Accra, Ghana, 5-7 September 2011. 6p.
Water storage ; Economic aspects ; Climate change ; Cost benefit analysis ; Upstream ; Downstream ; Reservoirs ; Models ; Economic thresholds ; Case studies / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H044292)
(0.18 MB)
Water storage is widely promoted as an effective method for mitigating some of the adverse impacts of climate change. Cost benefit analysis is one approach to evaluate which is the most appropriate water storage type under any specific biophysical and socio-economic conditions. However, this often result in loss of significant information for those characteristics which cannot be easily assessed using monetary values. Against this background, the study reported in this paper developed an outranking-based methodology, designed with threshold systems and weighting values, in order to overcome some of the constraints of traditional cost-benefit analysis. The method has been applied in three representative catchments in central and northern Ghana. The results present a preponderance of upstream areas linked with small reservoirs because of the considerably high income, the sufficient water supply, the low costs given for water related illnesses and the low costs for domestic water use.
12 Abtew, W.; Melesse, A. M. (Eds.) 2008. Proceedings of the workshop on Hydrology and Ecology of the Nile River Basin under Extreme Conditions, Addis Ababa, Ethiopia, 16-19 June 2008. Sandy, UT, USA: Aardvark Global Publishing. 368p. + 1CD.
Water resources ; Water management ; Hydrology ; Ecology ; River basin management ; Lakes ; Climate change ; International waters ; Water security ; Land use ; Environmental flows ; Downstream ; Weirs ; Simulation models ; Water balance ; Water use ; Water availability ; Watersheds ; Water productivity ; Water policy ; Erosion ; Sedimentation ; Rain ; GIS ; Remote sensing ; Evaporation ; Water power ; Investment ; Irrigation schemes ; Flooding ; Risks / Africa / Ethiopia / Kenya / Tanzania / Nile River Basin / Mara River / Lake Victoria Catchment / Gilgel Abbay Catchment / Lake Tana Basin / Chara Chara Weir / Rift Valley Lakes / Fogera Woreda / Geray Irrigation scheme / West Gojjam Zone / Amhara Region
(Location: IWMI HQ Call no: 551.48 G136 ABT Record No: H044302)
(0.46 MB)
13 Abtew, W.; Melesse, A. M. (Eds.) 2008. Proceedings of the workshop on Hydrology and Ecology of the Nile River Basin under Extreme Conditions, Addis Ababa, Ethiopia, 16-19 June 2008. Sandy, UT, USA: Aardvark Global Publishing. 368p. + 1CD.
Water resources ; Water management ; Hydrology ; Ecology ; River basin management ; Lakes ; Climate change ; International waters ; Water security ; Land use ; Environmental flows ; Downstream ; Weirs ; Simulation models ; Water balance ; Water use ; Water availability ; Watersheds ; Water productivity ; Water policy ; Erosion ; Sedimentation ; Rain ; GIS ; Remote sensing ; Evaporation ; Water power ; Investment ; Irrigation schemes ; Flooding ; Risks / Africa / Ethiopia / Kenya / Tanzania / Nile River Basin / Mara River / Lake Victoria Catchment / Gilgel Abbay Catchment / Lake Tana Basin / Chara Chara Weir / Rift Valley Lakes / Fogera Woreda / Geray Irrigation scheme / West Gojjam Zone / Amhara Region
(Location: IWMI HQ Call no: 551.48 G136 ABT c2 Record No: H044337)
14 Reis, J.; Culver, T. B.; McCartney, Matthew; Lautze, Jonathan; Kibret, S. 2011. Water resources implications of integrating malaria control into the operation of an Ethiopian dam. Water Resources Research, 47(W09530):10p. [doi: https://doi.org/10.1029/2010WR01016]
Water resources ; Waterborne diseases ; Malaria ; Dams ; Reservoirs ; Simulation models ; Water power ; Energy generation ; Electricity generation ; Environmental flows ; Downstream ; Flooding ; Flood control ; Irrigation / Ethiopia / Awash River Basin / Koka Reservoir
(Location: IWMI HQ Call no: e-copy only Record No: H044345)
(0.70 MB)
This paper investigates the water resources implications of using a method of hydrological control to reduce malaria around the Koka reservoir in central Ethiopia. This method is based on recent ndings that malaria is transmitted from the shoreline of the Koka reservoir, and on a similar method that was used to control malaria some 80 yr ago in the United States. To assess the feasibility of implementing hydrological control at Koka, we considered the potential impact of the modi ed management regime on the bene ts derived from current uses of the reservoir water (i.e., hydropower, irrigation, ood control, water supply, and downstream environmental ows). We used the HEC-ResSim model to simulate lowering the reservoir by a rate designed to disrupt larval development, which is expected to reduce the abundance of adult mosquito vectors and therefore reduce malaria transmission during the season in which transmission of the disease peaks. A comparison was made of major reservoir uses with and without the malaria control measure. In the 26-yr simulation, application of the malaria control measure increased total average annual electricity generation from 87.6 GWh x y -1 to 92.2 GWh x y -1 (i.e., a 5.3% increase) but resulted in a small decline in rm power generation (i.e., guaranteed at 99.5% reliability) from 4.16 MW to 4.15 MW (i.e., a 0.2% decrease). Application of the malaria control measure did not impact the ability of the reservoir to meet downstream irrigation demand and reduced the number of days of downstream ooding from 28 to 24 d. These results indicate that targeted use of hydrological control for malaria vector management could be undertaken without sacri cing the key bene ts of reservoir operation.
15 Sally, Hilmy; Levite, Herve; Cour, J. 2011. Local water management of small reservoirs: lessons from two case studies in Burkina Faso. Water Alternatives, 4(3):365-382.
Water management ; Water resources ; Reservoirs ; Water user associations ; Water allocation ; Water storage ; Water use ; Conflicts ; Case studies ; River basins ; Rice ; Downstream ; Irrigation schemes / Burkina Faso / Comoe River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H044385)
http://www.water-alternatives.org/index.php?option=com_docman&task=doc_download&gid=146
https://vlibrary.iwmi.org/pdf/H044385.pdf
https://vlibrary.iwmi.org/pdf/H044385.pdf
(1.23 MB) (1.25MB)
Burkina Faso is actively pursuing the implementation of Integrated Water Resources Management (IWRM) in its development plans. Several policy and institutional mechanisms have been put in place, including the adoption of a national IWRM action plan (PAGIRE) and the establishment so far of 30 local water management committees (Comités Locaux de l’Eau, or CLE). The stated purpose of the CLE is to take responsibility for managing water at sub-basin level. The two case studies discussed in this paper illustrate gaps between the policy objective of promoting IWRM on the one hand, and the realities associated with its practical on-the-ground implementation on the other. A significant adjustment that occurred in practice is the fact that the two CLE studied have been set up as entities focused on reservoir management, whereas it is envisioned that a CLE would constitute a platform for sub-basin management. This reflects a concern to minimise conflict and optimally manage the country’s primary water resource and illustrates the type of pragmatic actions that have to be taken to make IWRM a reality. It is also observed that the local water management committees have not been able to satisfactorily address questions regarding access to, and allocation of, water, which are crucial for the satisfactory functioning of the reservoirs. Water resources in the reservoirs appear to be controlled by the dominant user. In order to correct this trend, measures to build mutual trust and confidence among water users 'condemned' to work together to manage their common resource are suggested, foremost of which is the need to collect and share reliable data. Awareness of power relationships among water user groups and building on functioning, already existing formal or informal arrangements for water sharing are key determinants for successful implementation of the water reform process underway.
16 Karimov, Akmal; Molden, David; Platonov, Alexander; Khamzina, A. 2011. From improved water accounting to increased water productivity in the Fergana Valley. In ICID. 21st Congress on Irrigation and Drainage: Water Productivity towards Food Security, Tehran, Iran, 15-23 October 2011. New Delhi, India: ICID. pp.141-153. (ICID Transaction No. 30-A)
Water resources ; Water accounting ; Water productivity ; River basins ; Upstream ; Downstream ; Water depletion ; Water conservation ; Water use ; Evaporation / Central Asia / Uzbekistan / Fergana valley / Syrdarya River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H044425)
http://www.irncid.org/GetFileArticles.aspx?FilePrm=8327_12461.pdf
https://vlibrary.iwmi.org/pdf/H044425.pdf
https://vlibrary.iwmi.org/pdf/H044425.pdf
(1.06 MB) (1.07MB)
Facing competition for limited water resources with domestic, industrial, hydropower and environmental uses, agriculture has to adapt to produce more food with less water. This paper proposes to apply water accounting procedure to identify the scope for water productivity improvement. The Fergana Valley, a highly productive area within the upstream of the Syrdarya River Basin, was selected to examine the proposed procedure. Significant non-productive depletions of water as evaporation at 31-34% of the available water were identified in the Fergana Valley. There is also flow to sinks and pollution in the downstream at 1-5% of the gross inflow due to the changes of the river flow regime, its quantity and quality, caused by the return flow from the irrigated land and the winter hydropower releases from the upstream. Total non-productive depletions of water at 4,200-5,200 million m3 (Mm3) were identified in the form of evaporation, flows to sinks, and pollution. Proper water saving technologies to reduce non-productive depletions will improve water productivity in the Fergana Valley and increase water availability for the downstream water uses.
17 Johnson, J. H. 1983. Preliminary appraisal of the hydrogeology of the Lower Mekong Basin: a study supported by UNESCO. Draft report prepared for the Interim Committee for Coordination of Investigations of the Lower Mekong Basin, Lao PDR, Thailand and Vietnam. 101p. + annexes.
River basins ; Hydrogeology ; Projects ; Geology ; Topography ; Catchment areas ; Valleys ; Water supply ; Water quality ; Downstream ; Aquifers ; Drainage ; Deltas / Laos / Thailand / Vietnam / Lower Mekong Basin
(Location: IWMI HQ Call no: e copy SF Record No: H044479)
18 Gurung, Pabitra; Bharati, Luna. 2011. Downstream hydrological impacts of the Melamchi inter-basin water transfer plan. In Nepal. Department of Irrigation. Proceedings of National Irrigation Seminar Micro to Mega: Irrigation for Prosperous Nepal, Kathmandu, Nepal, 13-14 July 2011. Lalitpur, Nepal: Department of Irrigation. pp.161-168.
Downstream ; Hydrological factors ; River basins ; Water availability ; Water transfer ; Water supply ; Drinking water ; Water balance ; Models ; Dry season ; Wet season / Nepal / Melamchi / Kathmandu Valley / Indrawati River
(Location: IWMI HQ Call no: e-copy only Record No: H044590)
(1.33 MB)
19 Yilmaz, K. K.; Yucel, I.; Gupta, H.V.; Wagener, T.; Yang, D.; Savenjie, H.; Neale, C.; Kunstmann, H.; Pomeroy, J. (Eds.) 2009. New approaches to hydrological prediction in data-sparse regions: proceedings of symposium HS.2 at the Joint Convention of the International Association of Hydrological Sciences (IAHS) and the International Association of Hydrogeologists (IAH), Hyderabad, India, 6-12 September 2009. Wallingford, UK: International Association of Hydrological Sciences (IAHS). 342p. (IAHS Publication 333)
Hydrological factors ; Simulation models ; River basins ; Calibration ; Remote sensing ; Hydrometeorology ; Climate change ; Forecasting ; Rainfall-runoff relationships ; Flooding ; Drought ; Water balance ; Precipitation ; Case studies ; Evapotranspiration ; Satellite surveys ; Satellite imagery ; Catchment areas ; Groundwater ; Data ; Monitoring ; Macropores ; Vegetation ; Downstream ; Watersheds ; Analytical methods / Iran / West Africa / South Africa / China / India / Peru / USA / Brazil / Botswana / Karkheh River Basin / River Bani / Yellow River / Hanjiang Basin / Sahel / Kaidu River Basin / Laohahe River Basin / Peruvian Amazon-Andes Basin / Arizona / San Francisco River Basin / Brahmaputra River Basin / Limpopo River Basin
(Location: IWMI HQ Call no: 551.48 G000 YIL Record No: H044653)
(0.44 MB)
20 Wegerich, Kai. 2011. Politics of water in post-Soviet Central Asia. In Heaney, D. (Ed). Eastern Europe, Russia and Central Asia 2012. 12th ed. London, UK: Routledge. pp.48-52.
International waters ; International relations ; Political aspects ; River basins ; Canals ; Reservoirs ; Surveys ; Upstream ; Downstream ; USSR ; Irrigation ; Water power / Central Asia / Kyrgyzstan / Tajikistan / Uzbekistan / Kazakhstan / Turkmenistan / Syr Darya / Amu Darya / Aral Sea
(Location: IWMI HQ Call no: e-copy only Record No: H044665)
(0.83 MB)
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