Your search found 5 records
1 Elsheikh, A. E. M.; Zeinelabdein, K. A. E.; Elobeid, S. A. 2011. Groundwater budget for the upper and middle parts of the River Gash Basin Eastern Sudan. Arabian Journal of Geosciences, 4(3-4):567-574. [doi: https://doi.org/10.1007/s12517-010-0184-4]
Groundwater ; River basins ; Alluvial aquifers ; Water resources ; Meteorological data ; Surface water ; Water levels / Eastern Sudan / Gash River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H044942)
(0.33 MB)
The River Gash Basin is filled by the Quaternary alluvial deposits, unconformably overlying the basement rocks. The alluvial deposits are composed mainly of unconsolidated layers of gravel, sand, silt, and clays. The aquifer is unconfined and is laterally bounded by the impermeable Neogene clays. The methods used in this study include the carry out of pumping tests and the analysis of well inventory data in addition to the river discharge rates and other meteorological data. The average annual discharge of the River Gash is estimated to be 1,056 × 106 m3 at El Gera gage station (upstream) and 587 × 106 m3 at Salam-Alikum gage station (downstream). The annual loss mounts up to 40% of the total discharge. The water loss is attributed to infiltration and evapotranspiration. The present study proofs that the hydraulic conductivity ranges from 36 to 105 m/day, whereas the transmissivity ranges from 328 to 1,677 m2/day. The monitoring of groundwater level measurements indicates that the water table rises during the rainy season by 9 m in the upstream and 6 m in the midstream areas. The storage capacity of the upper and middle parts of the River Gash Basin is calculated as 502 × 106 m3. The groundwater input reach 386.11 × 106 m3/year, while the groundwater output is calculated as 365.98 × 106 m3/year. The estimated difference between the input and output water quantities in the upper and middle parts of the River Gash Basin demonstrates a positive groundwater budget by about 20 × 106 m3/year
2 Japan International Cooperation Agency (JICA).; Nippon Koei Co. Ltd.; Nikko Exploration and Development Co. Ltd. 2002. The study on groundwater development in the rural provinces of the central highlands. [Vietnam]. Vol. 3/1, Dac Lac Province. Final report - supporting report. Tokyo, Japan: Japan International Cooperation Agency (JICA); Tokyo, Japan: Nippon Koei Co. Ltd.; Tokyo, Japan: Nikko Exploration and Development Co. Ltd. 346p.
Groundwater development ; Highlands ; Rural areas ; Hydrogeology ; Surveys ; Water use ; Water balance ; Water quality ; Water supply ; Wells ; Drilling ; Groundwater potential ; Groundwater level ; Monitoring ; Models ; River basins ; Meteorological data ; Maps ; Socioeconomic environment ; Households ; Costs ; Electrical conductivity / Vietnam / Central Highlands / Dac Lac Province
(Location: IWMI HQ Call no: e-copy only Record No: H045162)
http://libopac.jica.go.jp/images/report/11702560_01.pdf
http://libopac.jica.go.jp/images/report/11702560_02.pdf
http://libopac.jica.go.jp/images/report/11702560_03.pdf
http://libopac.jica.go.jp/images/report/11702560_04.pdf
http://libopac.jica.go.jp/images/report/11702560_05.pdf
http://libopac.jica.go.jp/images/report/11702560_06.pdf
http://libopac.jica.go.jp/images/report/11702560_07.pdf
https://vlibrary.iwmi.org/pdf/H045162.pdf
http://libopac.jica.go.jp/images/report/11702560_02.pdf
http://libopac.jica.go.jp/images/report/11702560_03.pdf
http://libopac.jica.go.jp/images/report/11702560_04.pdf
http://libopac.jica.go.jp/images/report/11702560_05.pdf
http://libopac.jica.go.jp/images/report/11702560_06.pdf
http://libopac.jica.go.jp/images/report/11702560_07.pdf
https://vlibrary.iwmi.org/pdf/H045162.pdf
(5.05 MB)
3 Japan International Cooperation Agency (JICA).; Nippon Koei Co. Ltd.; Nikko Exploration and Development Co. Ltd. 2002. The study on groundwater development in the rural provinces of the central highlands. [Vietnam]. Vol. 3/3, Gia Lai Province. Final report - supporting report. Tokyo, Japan: Japan International Cooperation Agency (JICA); Tokyo, Japan: Nippon Koei Co. Ltd.; Tokyo, Japan: Nikko Exploration and Development Co. Ltd. 358p.
Groundwater development ; Highlands ; Rural areas ; Hydrogeology ; Surveys ; Water resources ; Water use ; Water balance ; Water quality ; Water demand ; Water supply ; Wells ; Drilling ; Groundwater Potential ; Maps ; Groundwater Level ; Monitoring ; Models ; River basins ; Meteorological data ; Electrical conductivity ; Socioeconomic environment ; Households ; Living conditions ; Costs ; Investment ; Social aspects / Vietnam / Central Highlands / Gia Lai Province
(Location: IWMI HQ Call no: e-copy only Record No: H045163)
http://libopac.jica.go.jp/images/report/11702578_01.pdf
http://libopac.jica.go.jp/images/report/11702578_02.pdf
http://libopac.jica.go.jp/images/report/11702578_03.pdf
http://libopac.jica.go.jp/images/report/11702578_04.pdf
http://libopac.jica.go.jp/images/report/11702578_05.pdf
http://libopac.jica.go.jp/images/report/11702578_06.pdf
https://vlibrary.iwmi.org/pdf/H045163.pdf
http://libopac.jica.go.jp/images/report/11702578_02.pdf
http://libopac.jica.go.jp/images/report/11702578_03.pdf
http://libopac.jica.go.jp/images/report/11702578_04.pdf
http://libopac.jica.go.jp/images/report/11702578_05.pdf
http://libopac.jica.go.jp/images/report/11702578_06.pdf
https://vlibrary.iwmi.org/pdf/H045163.pdf
(5.63 MB)
4 Japan International Cooperation Agency (JICA).; Nippon Koei Co. Ltd.; Nikko Exploration and Development Co. Ltd. 2002. The study on groundwater development in the rural provinces of the central highlands. [Vietnam]. Vol. 3/3, Kon Tum Province. Final report - supporting report. Tokyo, Japan: Japan International Cooperation Agency (JICA); Tokyo, Japan: Nippon Koei Co. Ltd.; Tokyo, Japan: Nikko Exploration and Development Co. Ltd. 351p.
Groundwater development ; Highlands ; Rural areas ; Hydrogeology ; Water use ; Surveys ; Wells ; Drilling ; Water balance ; Water quality ; Water demand ; Water supply ; Groundwater development ; Groundwater Potential ; Maps ; Groundwater Level ; Monitoring ; Models ; River basins ; Meteorological Data ; Socioeconomic environment ; Households ; Living conditions ; Costs / Vietnam / Central Highlands / Kon Tum Province
(Location: IWMI HQ Call no: e-copy only Record No: H045164)
http://libopac.jica.go.jp/images/report/11702586_01.pdf
http://libopac.jica.go.jp/images/report/11702586_02.pdf
http://libopac.jica.go.jp/images/report/11702586_03.pdf
http://libopac.jica.go.jp/images/report/11702586_04.pdf
http://libopac.jica.go.jp/images/report/11702586_05.pdf
https://vlibrary.iwmi.org/pdf/H045164.pdf
http://libopac.jica.go.jp/images/report/11702586_02.pdf
http://libopac.jica.go.jp/images/report/11702586_03.pdf
http://libopac.jica.go.jp/images/report/11702586_04.pdf
http://libopac.jica.go.jp/images/report/11702586_05.pdf
https://vlibrary.iwmi.org/pdf/H045164.pdf
(5.58 MB)
5 Teso, E.; Alamirew, T.; Olumana, M. 2014. Predicting runoff yield using SWAT model and evaluation of Boru Dodota Spate Irrigation Scheme, Arsi Zone, southeastern Ethiopia. In Erkossa, Teklu; Hagos, Fitsum; Lefore, Nicole. (Eds.). Proceedings of the Workshop on Flood-based Farming for Food Security and Adaption to Climate Change in Ethiopia: Potential and Challenges, Adama, Ethiopia, 30-31 October 2013. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.95-113.
Irrigation schemes ; Spate irrigation ; Runoff ; Catchment areas ; Water yield ; Runoff ; Forecasting ; Hydrology ; Models ; Soils ; Meteorological data ; Watersheds ; Water balance ; Rain ; Land use ; Rivers ; Flow discharge / Southeastern Ethiopia / Arsi Zone / Boru Dodota Spate Irrigation Scheme / Boru River / Keleta River
(Location: IWMI HQ Call no: IWMI Record No: H046942)
(304 KB)
For strategic planning and decision making on water-related development projects systematic assessment of the availability of water resources is imperative. Nevertheless, such information is rarely available for many of the subbasins in Ethiopia. Hence, ungauged catchments need to be modeled using hydrologic models. This study was initiated with the objective of calibrating and validating SWAT model on Keleta River gauged watershed (about 761.89 km2 ) so that it can be used to predict runoff on a monthly, seasonal and annual basis, and evaluate the Boru Dodota spate irrigation scheme that has a similar hydrometeorological condition with the Keleta Watershed. Keleta River’s observed flow data were used for sensitivity analysis, model calibration and validation. The result of model performance analysis demonstrated a good agreement between the average monthly simulated and measured values: Nash-Sutcliffe model efficiencies (NSE) of 0.71 for calibration and 0.73 for validation periods. Moreover, the coefficients of determination (R2 ), 0.73 and 0.76, were obtained during the same period. The calibrated parameter on the gauged catchment was in turn used to estimate runoff yield of the ungauged catchment. The simulated mean monthly and average annual water yields of the Boru River Watershed were found to be 0.53 and 6.4 m3 s-1, respectively. The 70% dependable wet season water yield of the catchment was 3.41 m3 s-1, and crop water requirement of the command area was 1.2 ls-1ha-1. The water yield from the catchment can irrigate only 2,842 ha of land out of the pre-designed 5,000 ha of land of the Boru Dodota spate irrigation scheme. In conclusion the SWAT model can be used to analyze ungauged watershed runoff yield in areas that have similar hydrometeorological characteristics as those of the Keleta Watershed in the region. The information obtained can then be used to redesign the spate system or a conventional irrigation system.
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