地理科学 ›› 1995, Vol. 15 ›› Issue (1): 55-62,100.doi: 10.13249/j.cnki.sgs.1995.01.55

• 论文 • 上一篇    下一篇

西藏羊卓雍错水位动态研究

刘天仇   

  1. 西藏水文水资源勘测局, 拉萨850000
  • 收稿日期:1994-02-01 出版日期:1995-01-20 发布日期:1995-01-20

CHANGES OF YAMZHO LAKE WATER STAGE IN XIZANG

Liu Tianchou   

  1. Tibetan Bureau of Water Resources and Hydrological Survey, Lhasa 850000
  • Received:1994-02-01 Online:1995-01-20 Published:1995-01-20

摘要: 羊卓雍错位于青藏高原南部.是较大的内陆湖泊,储水量的160亿m3,降水是湖泊的主要补给水源,融水补给量占16%,湖水位年平均变幅0.6m,年最高水位出现在9月或10月,正常年份湖水位呈周期变化,干早年全年呈下落趋势.

Abstract: The Yamzho Lake is the largest closed inland lake at the north foot of Mt.Himalayas,with a drainage area of 6100 km2.The lake covers an area of 621 km2 with an altitude of 4440 meters and a storage capacity of 16 billion m3.Precipitation is the main recharge source of the lake.Melt water makes up only 16 percent of the total recharge.Yearly lake level variation is within 0.6 meter.Due to self-regulation the highest water level of the lake does not appear in July or August when the rainfall is plentiful but in September or October.In a rainy year the lake level exhibits periodic variations and in a dry year the lake level has a fall tendency.The lake water level variation was influenced by temperature in the past 30 years.The analysis of the data for the last one hundred years shows that there is a tendency of lake level fall, the fall rate is 0.6meter/100 year.