Spatial and temporal variations of some hydrological factors in a climax forest ecosystem in the Dinghushan region;

As to some unpolluted and lightly polluted natural water bodies,such as rivers and reservoirs,the concentration of main ions in water quality items is in good correlation with some hydrological factors,such as water level,water temperature,runoff and so on.

The effect of Yongle water diversion engineering on downstreem watercourse and hydrological factor;

Variation process of hydrologic elements of river-aquifer system;

Some conclusions about Shiyanghe river basin such as unapparent increasing of precipitation,appreciably decreasing of mountain run-off and continually decreased of groundwater are acquired by the research about 45 years historical hydrologic element and water resources distributing characteristics.

We have discussed the hydrology characteristic property from aspect such as precipitation,evaporation,flood and runoff about the river basin,analyzed the variation rule of hydrologic elements,and found that the floodwater flux were 239m3/s,112m3/s for once in 100 years and for once in 50 year respectively.