Simulation Study On Runoff In The Middle Reaches Of Tumen River Based On SWAT Model

Water resources are the most basic natural resources that are indispensable for human activities and living activities.Living organisms can live in such an environment and cannot be separated from water resources.They are called the source of life,while water resources are the ecological environment.One of the controlling factors.At this stage,due to the impact of global warming,governments and scholars have increasingly discovered that under the state of climate change,their ecological security of water resources has been seriously threatened.In the distributed hydrological model,the SWAT model is widely used and the simulation results are good,which enables the author to build a basic database to study the regional water resources changes,and also introduce the model into the Northeast,Tumen River Basin.An attempt.By studying the Burhadong River Basin,the author utilizes and constructs the SWAT model,builds the basic database of the region based on the 21-year basic data,and determines the parameters through simulation.The following conclusions are obtained:1.After the SWAT model is transformed by data,It can be used in the middle reaches of the Tumen River.The initial efficiency coefficient of the model calibration period(1995-1996)is 0.98,and the model simulation period(1997-2015)has a relative coefficient of 0.82,which basically meets the model evaluation requirements.2.The model carries out runoff simulation prediction based on 25 different precipitation and temperature conditions,and calculates the corresponding temperature increase by 1 degree Celsius when the precipitation increases by 10%,20%,constant,decreases by 10%,and decreases by 20%.Celsius,constant,reduced runoff conditions corresponding to 1 degree Celsius and 2 degrees Celsius.When the precipitation does not change,the river runoff decreases with the increase of temperature,the highest reduction is 15.48%,and the average runoff is reduced to 10.34.%.When the temperature does not change,river runoff also increases with the increase of precipitation,the highest is 14.31%,and the average increase is 4.09%.The simulation results are credible and can provide the same reference for future changes in temperature and precipitation.