Increasing groundwater portion of ditchdrainage water is an important way to speed up desalination and salted soil improvement in irrigation areas.
而提高沟排水中地下水排泄量的比例是加快灌区脱盐和盐渍土改良的重要途径。
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Every schoolchild here learns the legend of "the great Yu," whose prodigious feats of canal building and drainageditch digging 4,000 years ago put an end to killer floods on the Yellow River.
Every schoolchild here learns the legend of "the great Yu," whose prodigious feats of canal building and drainageditch digging 4, 000 years ago put an end to killer floods on the Yellow River.