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长葛市地处豫中平原腹地,地表水和地下水均十分短缺,旱灾是制约农业生产的主要因素,多年来全市平均降雨量675mm,人均水资源占有量仅为209m~3,不足全国人均水资源占有量的1/10。全市水资源总量1.41亿m~3,农业灌溉用水占80%左右,过去由于该市长期沿用大水漫灌的粗放浇水习惯,水的利用率仅有25%～30%,造成水资源的极大浪费。近年来随着干旱持续加剧和工农业用水量的大幅度增加,供需矛盾日益恶化,自80年代以来,全市地下水位平均每年以0.67～1.2m的速度下降,造成全市近2000眼机井不能正常使用。尤其是西部贫水的石固、坡胡、后河等乡镇现有机井近半数干涸。旱魔成为农业的心腹大患。据预测,我市2000年总需水量将达15611万m~3,而供水量只有1.26亿m~3,平均年缺水2972万m~3。水资源短缺的
Changge City is located in the hinterland of Henan-Zhongping Plain, where surface water and groundwater are in short supply. Drought is the main factor restricting agricultural production. Over the years, the average rainfall in the city is 675mm, and the per capita water resource occupies only 209m ~ 3, less than the national per capita water Resource share of 1/10. The city’s total water resources of 141 million m ~ 3, agricultural irrigation water accounted for about 80% in the past due to the city’s long-term use of flood irrigation, extensive watering habits, water utilization rate of only 25% to 30%, resulting in water resources Great waste. In recent years, with the continuous increase of drought and the sharp increase of industrial and agricultural water consumption, the contradiction between supply and demand is deteriorating day by day. Since the 1980s, the average water table of the city has been decreasing by 0.67 ~ 1.2m per year on average, resulting in the inability of nearly 2,000 wells to be used normally . In particular, nearly half of the existing wells in the western part of the country, such as Shi Gu, Bei Hu and Houhe, which are poor in water, have dried up. Dry demons become a big threat to agriculture. It is predicted that the total water demand of our city in 2000 will reach 156.1 million m 3, while the water supply is only 126 million m 3, with an average annual water shortage of 29.72 million m 3. Water shortage