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5th International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991

Section 7: Agricultural Uses of Cistern Water

Page 371

Hung-Lou Trans-Basin Diversion Project In Penghu Area

Chun-Yen 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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