Study on the Ecological Water Requirement of Qilihai Wetland in Tianjin

Based on the structural characteristics and ecological functions of Qilihai Wetland in Tianjin,its ecological water requirement was divided into five parts including water requirement of water surface evaporation,water requirement of wetland plant,water requirement of infiltration,water requirement of wetland soil and water requirement of biological habitat.According to the calculation results of each part,the most proper ecological water requirement of wetland was 3.272 365×107 m3.