Surface Runoff Characteristics of Yellow Soil Slopping Upland and Utilization of Precipitation in Central Area of Guizhou Province Ⅰ.The effect of cropping on utilization of precipitation

The observation carried out at Xiuwen county,Central Guizhou from June,2001 to July,2003 showed that the surface runoff on yellow soil slopes coincides with the rainfall reception and it takes a considerable proportion,which leads to an inadequate utilization of precipitation and the utilization ratio decreases with the gradient goes up.

Water resources is deficient in China,but rainwater resources is abundant.

The utilization of urban rainwater resources can solve the problem of urban water resources crisis and bring a series of good eco-environmental effects.

In this paper the author introduces the meaning of rainwater resources and holds up the basic way to make rainwater resources,providing the foundation of the efficient use of rainwater in urbanarea.

The main measures of resourcing of rain and flood are to do well in water and soil conservation, extend vegetation of forest and grass, adjust consturction of planting, irrigate cropland with rainwater, make full use of various engineering facilities to store water and so on.

this paper made an elementary estimation and evaluation of rainfall resource availability potential in ecological using land.

Last but not least important,the technology of rainfall resource availability not only increase both production and income,but also has regional predominance clearly,and can\'t solicit the ecological and environmental problem in the large.

Analysis of domestic and foreign utilization of rainwater resources;