Based on the observation data of seepage quantity obtained from the dam of a annual storage reservoir and that of a pumped storage power station,the regularities and characteristic values are analyzed,the statistical model and regression model are established,and the affecting components are calculated by quantitative analysis.

Application of F test in the annual precipitation calculation;

Preliminary analysis for the regularity of annual precipitation in Shanxi Province;

Analysis for annual precipitation series representation and multi-year change in the downstream of Sanmingshaxi region;

By using the daily precipitation data of 81 stations in Northeast China during 1959—2004,we analyze the spatial and temporal distribution characteristics and variations of annual rainfall,precipitation-concentration degree(PCD) and precipitation-concentration period(PCP).

Based on demonstration of selection of index system and concentration multiplying power, calculation of annual water consumption and repeated use factor the paper indicates that some indexes to be offered for comparison should be set first and investigation and analysis should be according to the practical conditions of individual power plant.

Based on the change of yearly water consumption in some city,the author predicted the water demand in the same city through gray model GM(1,1) and improved model GAM,the latter model is better with a lower average relative error and error at the initial point.