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1 水资源现状根据1956～1998年系列资料进行计算和评价,安阳市多年平均降水量为573.5mm;多年平均水面蒸发量为1075mm;多年平均水资源总量为16.4亿m~3,全市人均322m~3/人,是河南省人均的69%,是全国人均的14%。安阳市近20年来水资源量总体上呈现出逐渐减少的趋势;90年代降水量是长系列(1956～1998年)降水量均值的90%;三大调水工程(红旗渠、跃进渠、漳南干渠)近几年平均每年的总引调量不足2亿m~3,尚不到多年(近40年)平均引水量的一半。全市水质较好的Ⅱ类和Ⅲ类河段长度仅占总河段长度的7%;而完全丧失使用功能的超Ⅴ类(严重污染)河段长度占77%。辖区洹河、汤河、卫河、金堤河、洪水河等均属超Ⅴ类水质。境内的主要水库也遭受到不同程度的污染。随着地表水水
1 Current Situation of Water Resources According to the data from 1956 to 1998, the average annual precipitation in Anyang City is 573.5mm; the average water surface evaporation in many years is 1075mm; the average water resource in many years is 1.64 billion m 3, and the average per capita 322m ~ 3 / person, which is 69% of the average per capita in Henan Province and 14% of the national per capita. In the past 20 years, the water resources in Anyang City showed a decreasing trend as a whole. Precipitation in the 1990s was 90% of the average precipitation in the long series (1956-1998). The three major water diversion projects (Hongqi Canal, Yuejin Canal and Zhangzhang South trunk channel) In recent years, the average annual total quota of less than 200 million m 3, less than a few years (nearly 40 years) half of the average water diversion. The length of Type II and Type III river sections with good water quality in the whole city only accounts for 7% of the total length of the river reach, while the length of the river exceeding Grade V (severe pollution) completely losing the use function accounts for 77%. Bahe River, Tanghe River, Weihe River, Jindi River, flood river and so on all belong to ultra-V water quality. The major reservoirs in the country are also subject to varying degrees of pollution. With surface water