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1 水资源基本状况偃师市水资源量主要来源于大气降水,全市多年平均降雨量524.1mm。由于受地形地貌和气候的影响,降雨年内分布集中,汛期降雨量(6～9月份)占多年平均降雨量的63.2%。枯水期的1～3月份和年末11～12月份降水量较少,尤其年初1月份和年末12月份降雨量更少,多年平均不足10mm。地表水资源量1.37亿m~3,地下水资源量3.756亿m~3。扣除重复计算量0.41亿m~3,全市多年平均水资源量为4.71亿m~3。人均占有水资源量602.1m~3,亩均占有水资源量669m~3,分别为全国平均水
1 The basic situation of water resources Yanshi City, mainly from the amount of water resources, precipitation, the city’s average annual rainfall of 524.1mm. Due to the influence of topography and climate, the distribution of rainfall concentrated during the year, rainfall in flood season (June-September) accounted for 63.2% of the average annual rainfall. In January and March in the dry season and precipitation in November and December in the year-end, there was less rainfall, especially in the beginning of January and the end of December. The average annual rainfall was less than 10 mm for many years. The amount of surface water resources is 137 million m ~ 3, and the groundwater resources is 375.6 million m ~ 3. Deducting the amount of repeated calculation of 41 million m ~ 3, the city’s average water resources for many years was 471 million m ~ 3. The per capita amount of water resources is 602.1m ~ 3, and the average amount of water resources occupied by each mu is 669m ~ 3, which is respectively the national average water