International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991
7: Agricultural Uses of Cistern Water
Diversion Project In Penghu Area
Chien, Cheng-Nan Tsay, J a -Chyun Wang
Water Conservancy Bureau (TPWCB, Taiwan, R.O.C.
Penghu Archipelago is located in southeast part of Taiwan Strait. The average
annual rainfall is 1,'013 mm which is no more than one half of that in Taiwan
Area. In addition, evaporation is as high as nearly 1.8 times of its average ,annual
rainfall. Since there are no high mountain and forestry in the area, most of the
rainfall either infiltrates or runs off to the sea immediately. The supply of
fresh water is in great shortage all year round for Penghu area. To solve the
problem, the utilization efficiency of rainfall should be promoted. Cheng-Kung
reservoir has usually failed to' be filled up owing to insufficient inflow. In
order to increase the inflow, an interception wall and conveying channel were
built near Hung-Lou village to divert the runoff from adjacent watershed to the
reservoir. As a result, the annual water supply has increased 20 %.
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