SWAT Model of Runoff Study under Different Land Use and Land Cover Situation in Xihe Basin
PEI Liang;CHEN Chen;College of Surveying,Mapping and Geographical Science,Liaoning Technical University;
Land use and land cover change play an important role in hydrological process of Xihe basin. In order to analyze the hydrology effect caused by land use and land cover change,this paper constructs the SWAT model applied to Xihe basin and calculates the mean monthly runoff,annual mean surface runoff depth,mean annual evaporation and mean annual soil side flow. The results showed: mean monthly runoff increased 8. 40% under the situation of farming and forestry land areas are increasing; Mean monthly runoff decreased 4. 11% under the situation of construction land areas are increasing; Mean monthly runoff decreased 1. 93% under the situation of dry land and other unused land areas are increasing. To sum up,the change of farming and forestry land in Xihe basin provoked the relatively greatest impact on runoff volume,and increase of farming and forestry land areas made the runoff increase; The change of dry land and other unused land provoked the relatively smallest impact on runoff volume,and increase of construction land and dry land and other unused land areas made the runoff decrease.
【CateGory Index】： P333