Based on the historically meteorological data from 11 stations in Shanghai,the temporal variation and spatial difference of surface humidity and their causes were analyzed with the humid index in Shanghai from 1960 to 2008.

Characteristics of temporal and spatial variation of surface humid index in East Gansu;

Using the monthly precipitation and the monthly mean temperature data in 1961-2004 from 20 meteorological stations,we calculated the surface humid indexes throughout Ningxia province.

The surface humid index is the ratio of rainfall to maximum potential evapotranspiration(ET0).

Desertification means land degradation in arid, semiarid and dry subhumid areas resulting from various factors, including climatic variations and human activities.

Surface water resources assessment in southern moist area——Take the case as Zhanghe Reservoir basin;

The technological pattern of harnessing humid sandlot in Tongren city,which belonged to Guizhou privince,chiese southern privince in China is exploited,and some suggestion that the main body should be popularized in southern shale corrosed humid sand district in this paper.