Abstract: In order to evaluate the effects of climate change on water resources, an evaluation model for the upper reaches of Shahe River (the central agricultural area of Henan Province) was set up, based on the Soil and Water Assessment Tool (SWAT) model. By using 1∶4000000 digital river data, the error automatically produced by using 1∶250000 DEM was removed. In the meantime, the hydrological and meteorological data in 1999-2002 and 2003-2006 were respectively applied to calibrate and verify the model, based on the sensitivity analysis of parameters. During the calibration period, the E^_ns=0.96 and r²=0.95; and during the verification period, the E^_ns=0.81 and r²=0.87. Both of these indicated that the model could be successfully applied to simulate the monthly runoff. The simulated results from 1966 to 2007 showed that the surface runoff and groundwater had the same changing trend with precipitation. Evapotranspiration was the main output of the water resources in the area, and the surface runoff was about 2 times of the groundwater. The runoff showed a lag behind precipitation, and the precipitation lagged 3 onths to become groundwater.

Key words: Phenanthrene, Degradative bacterium, Enzyme activity, Bioremediation