The features of soil

water and nutrient loss in Wangjiagou watershed

a typical hilly and gully Loess Area were analyzed based on the measured results of runoff amount

sediment concentration and nutrient concentration in surface runoff through the artificial stimulating rainfall in slope farming land and setting up the hydrological station in the outlet of the small watershed.The quantitative relationship between sediment amounts and the rainfall

antecedent soil moisture

soil texture

topography and vegetation covering were also established.The research results also indicate that the lost soil nutrient in slope farmland is 80 percent of the input amount of soil nutrient

and the fine soil particles are the main carrier of the soil nutrient transferring into surface runoff.In addition

the comprehensive controlling methods may effectively reduces the soil

water and nutrient loss of the farmland in the hilly and gully loess area.