在我国北方平原地区,目前较广泛地采用了“以井保丰、以河补源”的井渠结合灌溉方法。它是综合、合理利用地表水和地下水,防止灌区地下水位升高从而产生渍害和土壤次生盐碱化,以及防止过量开采地下水从而产生地下水下降漏斗等公害的有效灌溉 In the northern plains of our country, at present more extensively adopting the method of combining irrigation with wells and drains “Wells are well protected and rivers are recharged”. It is an effective, comprehensive and rational use of surface water and groundwater to prevent irrigation water table elevation resulting in waterlogging and secondary salinization of soil, as well as prevent excessive exploitation of groundwater to produce groundwater funnel and other funnel effective irrigation