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区内属高原亚热带气候。以干湿两季分明为主要特点。常年6～10月份为雨季。占年降水量的80%左右。其余七个月为多风干旱季节。气候与水文分带规律明显:从北向南多年平均降水量由1300递减为800毫米;地表径流深度亦由700依次削为200毫米。因此,地下水的辅给来源及其水资源的丰富程度及南北部及其年分配相差悬殊。按地下水流域系统以“水文地质类型”为单元。是水文地质区划和水资源评价的基础和
Plateau subtropical climate. With wet and dry seasons as the main feature. Perennial 6 to October for the rainy season. Accounting for about 80% of annual precipitation. The remaining seven months are windy and dry seasons. Climate and hydrological zoning obvious: from north to south for many years the average annual precipitation decreased from 1300 to 800 mm; surface runoff depth from 700 to 200 mm in turn. Therefore, the sources of groundwater supplements and the abundance of their water resources, as well as the distribution of groundwater in the South and the North, vary greatly. According to the groundwater drainage system to “” type of hydrogeology "as a unit. It is the basis of hydrogeological division and water resources evaluation