塔里木河河道自净需水量

Water requirement for the self purification of the Tarim River

在一维水质模型基础上,根据河道断面流速与流量的关系,建立了计算河道自净需水量的试算模型,分析了塔里木河各河段的水质控制目标.根据不同历史时期监测的塔里木河西大桥、阿拉尔、新渠满水文站、新和和沙雅干排的水质资料,计算了塔里木河河道新渠满水文站断面的自净需水量.结果表明:新渠满水文断面年自净需水量6.39×10~8 m^3,3,4,11,12月自净缺水0.97×10~8 m^3.

With the 1-D water quality model, a trial calculating model of water requirement of a stream＇s self purification was established based on the relationship between flow velocity and discharge of stream section. The target of water quality control was analyzed. On the basis of water quality data of Xidaqiao, Alar, Xinquman hydrological stations along the Tarim River and the main drainage channel of Shaya-Xinhe County, water requirement for the self purification of Tarim River was calculated and the results show that the water requirement of the stream＇s self purification of Xinquman hydrological station of Tarim River is 6.39×10^8 m^3/a, and the water shortage is 0.97×10^8 m^3/a, which appears in March, April, November and December.