The determination of relief amplitude´s best window and its application in soil and water conservation

According to the real need, we used GIS technology through the window analysis method and find the most suitable window. In the window under extraction relief amplitude, and the analysis of the Chinese and the distribution of relief amplitude and its regional soil and water conservation in the application. Research shows that: The majority of the relief in China has a low altitude without much fluctuation, with western areas higher than the east, and northern areas lower than the south. Best window of relief amplitude in Dongbei is 5×5; Best window of relief amplitude in Hengduanshan is 9×9; Best window of relief amplitude in Jiangxi is 7×7; Best window of relief amplitude in Sichuan is 5×5; Best window of relief amplitude in Shandong is 7×7; Best window of relief amplitude in Shanxi is 11×11, The best window of relief amplitude with universality throughout the nation is 5×5, Relief amplitude is a more appropriate regional soil and water loss evaluation index of the terrain.