艾比湖近期入湖水量及其变化

RECENT WATER VOLUME FLOWING INTO EBINUR LAKE AND ITS CHANGE

1988年对文比湖进行环湖考察，结果表明艾比湖入湖地表径流来自博尔塔拉河和精河．从1988年6月～1993年12月设站观测两河入湖水量，1989～1993年平均入湖水量4．64×108m3，其中博尔塔拉河入湖水量3．31×108m3，占71．3％；精河为1．33×108m3，占28．7％．在观测的五年中，水量多年变化不大，总入湖水量最大水年与最小水年信比为1．6．两河入湖水量的年内分配不同，博尔塔拉河入湖水量集中在冬季，其原因是博尔塔拉各地有三个断陷盆地，形成三个地下水库，对径流进行调节，使下游丰水期滞后半年．精河入湖水量集中在夏季．两河入湖水量丰、枯水期相互错开，使总太湖水量年内分配均匀．

The result of the investigation surrounding Ebinur Lake in 1988 shows that the surface runoff flowing into Ebinur Lake comes from Bortala River and Jinghe River. According to the data collected by the hydrometric stations from June of 1988 to December of 1993, the mean annual water vo1ume flowing into thc lake was 4.64 ×108m3,and 71 .3 % (3.31 ×108m3) of which came from Bortala River and 28.7% (1 .33 × 108m3) from Jinghe River. The change of water volume was not so large in the past 5 years. The ratio of maximum and minimum annual volume is 1.6. The distribution of the watcr volume flowing into the lake from the tWo rivers is different, that is the water from Bortala River concentrates mainly in winter due to the regulation of three fault basins in Bortala valley as three reservoirs of ground-water, which make the watererich period at the lower reaches delay for 6 months;the water from Jinghe River concentrates mainly in summer. This situaton makes the water flowing into the lake well-distributed in a year.