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1 新乡市缺水形势严峻发展节水灌溉迫在眉睫新乡市多年水资源可供总量为27亿m~3,而需水量为34亿m~3,缺水7亿m~3,缺水率21%。该市每年农业灌溉用水量约22亿m~3,占全市总用量的75%以上,农业作为用水大户,一方面缺水,另一方面又浪费严重。采取粗放的土渠输水、大水漫灌的传统浇灌方式,造成无效渗漏多,水资源的利用系数仅为0.3～0.4,即每年供给的22亿m~3的农业灌溉
1 Xinxiang City, the water shortage situation is grim development imminent water-saving irrigation Xinxiang City for many years for a total of 2.7 billion m 3 water resources, and water demand of 3.4 billion m 3, water 700 million m 3, water scarcity 21 %. The city’s annual agricultural irrigation water consumption of about 2.2 billion m ~ 3, accounting for more than 75% of the total amount of the city, agriculture as a large water user, on the one hand, lack of water, on the other hand wasted. Take the extensive drainage of soil and water, flood irrigation of the traditional way of irrigation, resulting in ineffective leakage of water resources utilization coefficient of only 0.3 to 0.4, that is, annual supply of 2.2 billion m ~ 3 of agricultural irrigation