Soil Water Environment near Shinaihai in the West of Qinghai Lake

According to drilling through soil sampling,particle analysis and determination of water content,we study the changes of soil moisture,soil dry layer and soil reservoirs and other issues at Shinaihai in the west of Qinghai Lake.The results indicate that soil moisture distribution is special and water content varies greatly.The precipitation increases greatly in this area in 2009,so 0.6 m depth of water is rich within the upper part and there is more gravity water.Because of the lower water content of soil below the depth of 0.6 m,there is often the development of mild and moderate dry layer in some sections.This represents the normal water content in soil characteristics.The soil is predominantly silty sand in the west of Qinghai Lake.Because the thickness of soil is thinner and less soil water storage,the soil reservoir capacity is less soil moisture.Therefore,it is easy to emerge soil water deficit in dry years.The results show that this area is suitable for developing grassland vegetation and crops which consume less water,not suitable for the development of plantations.The upper soil moisture has not yet reached saturation in the wet years in the west of Qinghai Lake.In addition,the precipitation is less in normal year and heavy rain and storm is rare in the area,so it is impossible of precipitation to supply lake through soil and surface runoff.