| Distribution and circular process of water resources in the arid area of Hexi Corridor |
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| DOI：10.7606/j.issn.1000-7601.2011.06.30 |
| Key Words: water resources ice-snow water surface water ground water water resources circulation Hexi Corri-dor |
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| Abstract: |
| The runoff , glacier, hydrological geology and climatological observed data of three inland rivers (Shule
River，Hei River and Shiyang River ) basins in Hexi corridor from 1955~ 2006 were used to analyse systematicaly the law of distribution and its cyclic transformation relations of water resources in these basins. The results indicated that water resources of Hexi Corridor mainly exist with ice rsnow，suface and groundwater resources，distributed around the three relatively independent river basins. All together 57 rivers develop in southern Qilian Mountains，and the average anmual runoff from the mountain areas totals 72.4×108 m3. On the whole, the runoff from the mountain areas is very stable in recent 56 years. Hexi corridor is mainly composed of egiht basins in structural landform，and the ground water of these basins mainly receive river water from mountain areas and the vertical ground water recharge in the area, these are the re-peated manifestation of earth s suface water resources . The average annual recharge of ground water is 42.5×108 m3. In the years of 1950s~1990s, the ground water recharge in the area reduces by 30%，about 3.5×108 m3 every 10 years. Subject to the structural landform， from southern mountain to norther basin, groundwater and river water form a complete and unified circulatory system of water resources as“qround water in the mountain suface water
ground water of southern basin- suface water-ground water of northren basin'”after underyoing regular and repeated conver sion process in 5 different zones. |
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