ASSESSMENT THE IMPACTS OF LAND SURFACE CHANGE ON THE HYDROLOGICAL PROCESS BASED ON SIMILAR HYDRO-METEOROLOGICAL CONDITIONS WITH SWAT.

The impacts of land surface changes on the hydrological responses for Dongwan Basin, China, have been examined with the soil and water assessment tool (SWAT), which is calibrated and validated for the pre-change period 1961-1985, and then used to reconstruct the runoff without considering land surface changes from 1986-2011. The results indicate that both land surface change and climate decrease runoff 45.08% and 54.92% respectively. Modeling results improve the understanding the similar hydro-meteorological condition method. We found seven pair period for 1-year interval and six set of paired period for an interval of 3-years. The impacts of land surface changes varied in paired years, matched the results of the pre-change period and post-change period, and land use change analysis. The similar hydrometeorological conditions could be applied combining with traditional methods in hydrological research at different time scale. [ABSTRACT FROM AUTHOR]