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Communication incl. Poster: BibTeX citation key:  Mariko
Mariko, A., Bokar, H., Konaré, A., Bamba, F., Diallo, D. & Kamagaté, B. 2009. Flow Simulation and Climate Change Impact on Shallow Groundwater Recharge in Kolondieba catchment Basin, Sudanese climate zone in Mali. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: Devic 2009-09-08 16:26:58
Categories: General
Keywords: Climate
Creators: Bamba, Bokar, Diallo, Kamagaté, Konaré, Mariko
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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The catchment basin of Kolondieba is a subcatchment of the Bani in Sudanese climate zone of Mali with mean rainfall of 1400 mm/year. It covers an area of about 3100 km2.The area is known to grow cotton and recently demand of the cotton in world markets has led to the growing of cultivated and populated areas and thus to the increase of drinking and domestic water supply demand, and probably to the pollution of water resources with the use of pesticide and fertilizers.
Shallow groundwater is mostly used for water supply through poorly dug wells. High evapotranspiration demand and short recharge period has led to groundwater level variability in this area.
Groundwater recharge assured by atmospheric percolation is only available in rainy season from June to October. Groundwater levels decline just after recharge period and cause most of shallow wells to dry.
Steady state groundwater flow model using Visual Modflow showed that the shallow groundwater is discharged in to the river catchment area. Simple downscaling method is used to downscale the precipitation and temperature data from global scale to local scale, which is then used as input in the model to project the change of the recharge in the period of 2020 to 2050. Our study on climate change and their impact on groundwater resources, found that precipitation has strong correlation with groundwater level variability. The tested scenarios show enhancement of the seasonal changes in groundwater Recharge.
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