吐鲁番盆地典型剖面的地下水径流特征

Groundwater Runoff Characteristics of Typical Profile in Turpan Basin

为研究吐鲁番盆地南北断面方向上地下水的流动规律,沿吐鲁番盆地中部南北剖面建立了二维地下水流动模型,采用二维地下水流数值模拟方法对剖面模型进行识别,在此基础上分析了吐鲁番盆地第四系地下水流动系统在剖面上的循环特征、流速分布特征、剖面上地下水的平均滞留时间和径流强度。模拟结果表明,吐鲁番盆地地下水流动系统存在局部流动系统、中间流动系统和区域流动系统,局部流动系统循环深度北盆地为600 m,南盆地为300 m,中间流动系统循环深度达1 000 m,区域流动系统循环深度达1 200 m。

To study the groundwater flow law which in the north and south section of Turpan basin,two-dimensional groundwater flow model is established.It is along north and south section of the central Turpan basin.Using two-dimen- sional groundwater flow numerical simulation method to identify the profile model.Based on the model, this paper ana- lyzes many Quaternary groundwater flow system characteristics in Turpan basin,such as circulation characteristics in pro- file, velocity distribution characteristics, average residence timeand groundwater runoff intensity in profile.Simulation re- suits show that groundwater flow system in Turpan basin have three types,including local flow system, intermediate flow system and regional flow system.Local flow system circulation depth is 600 m in the north basin and 300 m in the south basin,the circulation depth of intermediate flow system and regional flow system is 1000 m and 1200 m respectively.