NDLI: Hydrological study of hydropower and downstream water release.

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Hydrological study of hydropower and downstream water release.

Content Provider	CiteSeerX
Author	Birhanu, B. Z. Mkh, S. Mtalo, F. W. Kachroo, R. K.
Abstract	Kihansi hydropower plant is located in south central Tanzania deriving its water from a catchment that has an approximate drainage area of 584km2. The availability of high head in a short stretch of the river and the reasonably favorable hydrology with a reliability of flows exceeding 7cumecs (95 % of the time) makes the catchment an ideal source of water for the hydropower plant and the livelihoods of the species in the lower Kihansi gorge. A hydropower plant has been designed as a 180MW run-of-the-river type with provision for expansion to 300MW in the future making it a significant power source for the energy-strapped country. This research focuses on the hydrology of Kihansi river catchment and estimates the actual water release downstream for environmental mitigation purpose. The study finds out that the catchment hydrological regime is characterized by a constant and reliable base flow and the percentage of time the average flow is equaled or exceeded ranges from 31 % to42%. Long term hydrologic data analysis indicated that water loss is high in the western and northern parts of the catchment. The landuse change such as the deforestation in the catchment is a potential threat for the availability of enough water to run the hydropower plant and sustain the downstream release required for endemic species, already in danger.
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Subject Keyword	Hydrological Study Hydropower Plant Downstream Water Release Northern Part Kihansi Gorge Average Flow Approximate Drainage Area Downstream Release High Head Kihansi River Catchment Environmental Mitigation Purpose Water Loss Reliable Base Flow Favorable Hydrology Landuse Change Enough Water Long Term Hydrologic Data Analysis Ideal Source Potential Threat Catchment Hydrological Regime Kihansi Hydropower Plant Significant Power Source Run-of-the-river Type Energy-strapped Country South Central Tanzania Endemic Specie Short Stretch Actual Water Release Downstream
Content Type	Text

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