摘要
青海湖水位的下降 ,湖面积的缩小 ,使生态保护区的水资源发生了动态变化 ,引起了各方面的关注。我们主要应用水量平衡法 ,分析计算了青海湖入湖补给量、耗水量以及盈亏水量。掌握了青海湖水位变化规律 ,并对未来湖水位的变化趋势作了预测。
Located in the northeastern part of Qinghai Province (i.e.,36°15′～38°20′N,97°50′～101°20′E,3194～5174 m a.s.l.),Qinghai Lake watershed has an area of 2.97×10 4km 2.Qinghai Lake has a water area of 4259km 2 and a storage capacity of 725.0×10 8m 3 at present.The lowering of the water level and the reduction of the lake area have brought about a dynamic change of water resources in the nature resreve of ecology,which have been paid a great attention to by all circles.This paper analyzes the inflow volume and evaporation from the water surface as well as the profit loss budget of Qinghai Lake with water budget method.The results show that the average annual inflow volume,evaporation from the water surface,and profit-loss budget volume are 36.96×10 8,40.51×10 8,and -3.55×10 8m 3 respectively.The water level of the lake lowers in an overall trend,its lowering speed,however,has slowed down since recent 10 years. By using the grey model of the lowering trend of water level of the lake over the years,the change trend of water level of Qinghai Lake in future is calculated. The calculated results show that the water level of the lake will continuously lower in an annual speed of 0.04m during the period from 2000 to 2010.
出处
《干旱区研究》
CSCD
2001年第3期58-62,共5页
Arid Zone Research
