强人类活动影响下缺资料平原区内陆湖泊的水量平衡研究一直是个难题。以平原区内陆湖泊卧龙湖为研究区，构建了分布式水文模型并分析水量平衡关系。模型模拟结果纳什系数大于0.75，径流相对误差均小于3%，模拟效果良好。通过对丰、平、枯、特枯等典型年的水量平衡进行分析，结果表明：在天然情况下，卧龙湖丰水年、平水年、枯水年以及特枯水年湖泊蓄变量分别为2044197万m3、791109万m3、165498万m3、68705万m3。考虑上游截留后，丰水年湖泊蓄变量为1542478万m3，平水年湖泊蓄变量为19434万m3，枯水年和特枯年东西马莲河出现断流情况，导致湖泊在枯水年、特枯年极度缺水。

The water balance of lakes in the plain areas is difficult to estimate due to the influences of human activities.In the paper,a distributed hydrological model was constructed and the water balance was calculated for the Wolong Lake,an inland lake in the plain area.The model simulation results had a Nash coefficient being greater than 0.75 and a relative runoff error of being less than 3%. The water balance was further investigated for typical years,such as,wet year,normal year,dry year and extreme dry year.The results showed that under natural conditions,the lake storage were 20442 million m3、7911 million m3、1655 million m3、 6.87 million m3,respectively.If water was interrupted in the upstream section,the lake storage would reduce to 15424 million m3 for wet year,and to 1943 million m3 for the normal year.Under the dry year and the extreme dry year,there was no flow in the East and West Malian River,causing the lake to be extremely drought.

国家重点研发计划（ 2017YFC0404504）