THE PROPERTIES OF WATER CYCLE IN SOIL AND THEIR EFFECT ON WATER CYCLE FOR LAND IN THE LOESS REGION
黄土区土壤水分循环特征及其对陆地水分循环的影响

The loess region lies in the middle reaches of Huung He River. The water-holding capacity, evapotranspiration, water deficit in soil, infiltration of rainfill into soil and the dry layer for soils in the loess region are investigated in this paper and their effect on ecological environment is also discussed.The soils in most of the loess region have a waterholding capacity of 250mm per metre of soil layer. The annual evapotranspiration corresponds approximately to annual average precipitation for the fields...