International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991
3: Catchment and Storage System Designs
Hong-Lo Transbasin Rainwater
Harvesting Works For The Cheng-Kung Reservoir In Penghu
Council of Agriculture, R.O.C.
The Penghu Pescadores located in the west of Taiwan Proper are scarce in' water.
The annual precipitation is only about 1,000 mm which is much less than the measured
evaporation of 1,800 mm. The water supply there entirely relies on the surface
runoff and groundwater. In the dry year, the domestic water supply entirely depends
on the groundwater even up to 100% as most of the reservoirs dry up.
Due to lack of geological and meteorological data, hydrologic analysis was
extremely; difficult for planning reservoirs especially in the early stage of
development. At present, there are five surface-water reservoirs and one underground
reservoir with a total effective capacity of 3.9 million cubic meters, of which
the Chengkung Reservoir with a capacity of 1.04 million cubic meters, is selected
This paper is to review the hydrologic analysis of the Chengkung Reservoir
and to illustrate its transbasin rainwater harvesting system which was completed
in the recent year. It is emphasized that continued efforts on collection of geological
and hydrological data are to be made for application of the improved methodology
in hydrological analysis for planning cisterns on the water-scarcity off-shore
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