Study of the runoff characteristics based on a scenario analysis

Change in the runoff is controlled by two vectors of natural change and human activity.The paper studies the runoff characteristics of the Weihe River basin in Shaanxi based on a distributed hydrological model and scenario analysis method.The runoff change of the Weihe River basin in Shaanxi is simulated through selecting rainfall and land use as the main factors and sets the different scene.The results show that the annual rainfall significantly affects annual runoff,the appearance time of peak monthly runoff appears clear random;runoff is not affected by land-use significantly due to less rainfall and large evaporation in the basin.