TROPICAL GEOGRAPHY ›› 1993, Vol. 13 ›› Issue (4): 327-334.

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Li Zhi-bin   

  1. Hengyang Teachers College, Hunan, 421008
  • Received:1992-04-01 Online:1993-10-30 Published:1993-10-30


The annual total amount of water resources in Hunan is estimated about 20.85×1010m3,the total amount of water power resources is 15.33×10kW,both have great potentialities for exploitation.Ground water resources are characterized by their varied types and good quality,and are easy to be exploited.But annual precipitation and runoff are distiibnted unevenly. There are 4 high value areas and 3 low value areas.In high value areas the annual precipitation is 1600-2000 mm and runoff depth 800-1400 mm,while in low value areas they are 1100-1300 and 900-700 mm,respectively.Seasonal pricipitation and runoff differ greatly,of which over 70 percent are concentrated in the period from April to September.Calamities of drought and waterlogging occur frequently. The average silt content of the rivers ranges from 0.127 to 0.416kg/m3,and about 17.14×107t/a of silt is deposited in Dongting Lake.The lake's capacity of regulating and storing water from rivers reduces gradually.Some measures for protecting and utilizing water resources rationally are put forward: 1) increasing comprehensive benefits of the utilization of water resources; 2) strengthening the management of water conservancy facilities; 3) exploiting ground water resources;4)harnessing river basins in comprehonsive way and protecting water sources; 5) adjusting agricultural structure and distribution,developing advanced technology of irrigation.

Key words: Water resources, Characteristic, Exploitation and utilization, Hunan Province