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在GIS技术支持下结合气候条件的变化,对黑河调水以来额济纳盆地的湖泊面积变化和蒸发量变化进行分析。结果表明:额济纳盆地湖泊主要包括东、西居延海和进素土海子,各湖泊在2002年7月后陆续恢复,其中东居延海2004年后常年蓄水,进素土海子在2008年后常年蓄水,西居延海为季节性湖泊。盆地内湖泊总面积最大达到103.85km2,年蒸发量最大达到1.79×108 m3。湖泊除受地表调水补给外,还受地下径流补给,2005年后东居延海每年接受地下径流净补给量约2 500×104~3 000×104 m3。
With the support of GIS technology, the change of lake area and the change of evaporation in the Ejina Basin since the water transfer were analyzed based on the change of climatic conditions. The results show that the lakes in the Ejina Basin mainly include the east and west coasts of Yanhai and Jinsuotuhaizi, and the lakes have been resumed after July 2002, of which the East Juyanhai has been in permanent storage for water since 2004, After perennial water, the West Juyan seasonal lake. The total area of lakes in the basin reaches a maximum of 103.85km2, and the annual evaporation reaches the maximum of 1.79 × 108 m3. In addition to being recharged by surface water, lakes are replenished by underground runoff. After 2005, the annual net recharge of underground runoff by the East Juyan Sea is about 2 500 × 104 ~ 3 000 × 104 m3.