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兴文县位于四川盆地南部,属川南褶皱带,以南为云贵高原,以北为盆南山地,地形呈南高北低,山脉从西南向东北断续延伸。海拔高度最低275米,最高1795.1米,高差达1520.1米。境内地形复杂,有溶蚀冲积槽坝、丘陵、低山和中山等四种地貌,幅员面积1373平方公里。兴文县气候属于大陆与海洋气候的交替地带,由于受地形的抬升作用,其境内降雨时空分布极为不均,年际变化大,全县多年平均降水量为1133毫米,降水总量为16.3亿立方米,多年平均径流801.5毫米。一、水资源状况全县共有大小溪河19条,总长313.98公里,均属长江水系,分别汇集于南广河、长宁河、永宁河流入长江。流域面积在500平方公里以上的有1条:古宋河;100-500平方公里的有4条,分别是:晏江河、建武河、建设河、泥沙河;50-100平方
Xingwen County is located in the south of Sichuan Basin, which belongs to the south Sichuan fold belt, with the Yunnan-Guizhou Plateau to the south and the basin-south mountainous area to the north. Its terrain is high in the south and low in the north. The mountains extend intermittently from southwest to northeast. The lowest altitude of 275 meters, the highest 1795.1 meters, the elevation of 1520.1 meters. The territory of the complex terrain, erosion alluvial trough dam, hills, low mountains and Zhongshan four kinds of landform, covers an area of 1373 square kilometers. Xingwen County climate belongs to the alternation between the mainland and the marine climate. Because of the uplift of the terrain, its spatial and temporal distribution of rainfall in China is extremely uneven with large interannual variations. The average annual precipitation in the county is 1133 millimeters with a total precipitation of 1.63 billion Cubic meter, average annual runoff 801.5 mm. I. Water Resources The county has a total of 19 large and small streams, with a total length of 313.98 kilometers, all belong to the Yangtze River system, respectively, converged in the South Canton River, Changning River, Yongning River into the Yangtze River. Basin area of 500 square kilometers in more than one: the ancient Songhe River; 100-500 square kilometers has four, namely: Yanjiang River, Jianwu River, the construction of the river, Shahe River; 50-100 square feet