In hilly areas, water pumping irrigationlift is high, and the irrigation water fee is high because of the high pumping cost, so the burdens on farmers are very heavy.
丘陵地区提水灌溉需要的扬程高,水费占灌溉成本的比重大,农民的负担很重。
2
Because of these low-lying areas water lift is not high but the irrigation or drainage water a considerable loser should adopt a "low-head large flow" performance characteristics of axial flow pump.