Climatic characteristics of precipitation and exploitation and utilization of rainwater resource from 1961 to 2005 in Hebei province

The climatic conditions result in the lack of water resources in Hebei province.Precipitation is one of the main sources of water resources,and rain amount often corresponds to the high flow or the low flow changes of water resources.Based on precipitation data from 1961 to 2005 in Hebei province,the temporal and spatial distributions,annual and multiple annual variations of rainwater resources were analyzed.The results indicate that precipitation is a decreasing tendency yearly by yearly in Hebei province,and the speed of precipitation decrease in plain is larger than that in mountain land.According to rainwater resource conditions,it suggests that lack of precipitation leads to the supply shortage of water resource to some extent,and it accelerates the shortage of water resource.The traditional exploitation and utilization method of water resource is already not appropriate.In order to settle the supply and demand contradiction,exploitation and utilization of rainwater resource is the effective method.