Regulation of Ecological Water Volume under High-or Low-flow in the Mainstream Area of the Tarim River
In this paper,we studied the water loss,available ecological water volume and ecological water supply under different inflow conditions in the upper stream of the Tarim River with the methods of monitoring,GIS and hydrological model.We formulated the ecological water regulation according to the distribution of natural vegetation and the characteristics of water demand supply.The results were as follows:① Under the inflow frequencies of 10％,25％,50％,75％ and 90％,the available ecological water volumes were 48.39 × 108 m3,38.05 × 108 m3,27.20 × 108 m3,17.41 × 108 m3 and 11.93 × 108 m3,which would meet the vegetation water demands of 217％,171％,122％,78％ and 53％,respectively;② In high-flow year (below 25％),normal year (25％-75％) and low-flow year (above 75 ％),the designed ecological goals were the ‘ regeneration’,‘ basic conservation’ and ‘ key conservation’.An ecological water regulation program with 3-5-year period,rotation flow from July to September and 15-20-day duration was made.The rotational overflow should be implemented 2 or 3 times in the whole area in high-flow year,1 or 2 times in ecological sensitive zone and ecological-fragile area in normal year,and ecological water supply only in the key conservation area by water loss.The study results could provide the scientific foundations and technical guidance for the optimal redistribution of ecological water and the conservation and regeneration of natural vegetation in the mainstream area of the Tarim River.
riverwaywater lossecological water supplywater balancehigh-or low-flow changeecological water regulationTairm River
国家科技期刊平台
NSTL
万方数据
维普
