对汉江上游的生态环境需水量进行了初步探讨。根 据汉江流域的特点和实际条件，初步确定选用Tennant法、Q90法和湿周法3种方法计算生态 环境需水量，并通过比较综合确定最终的生态环境需水量。 

In this paper, the environmental water demand in the upstream of Hanjiang River is studied. Three methods,namely,Q90 method, tennant method and wet perimeter method are used to calculate the environmental water demand, and then the recommended environmental water demands obtained from the results of the above three methods are given.