关键词: 黄淮海

Abstract: A great deal of depression is distributed over The Huang Huai Hai alluvial plain, based on watersoil condition, they are divided into three types-Sand depression, Salinezedmarshed depression and Salinizated depression. The Bei QiuWa belong the last one.A common characteristic in these depress ions is that drainage of ground water isn't unimpeded.Because there is difference in water Soil conditions, used transform way is different too.The paper Shows that full irrigation for flushing salt play the great role in Salinen-alkali soil transform in Bei QiuWa. Velocity of flushing Salinen is rapid, effect is extremely marked.Flushed salinen content in the lowest part can't be drained a way through ground water.Based on the Situation, the paper poses model about harnessing depression Salined-alkali soil, Which dig a lot of non-complete phreatic water wells to pump salt ground-water to reduce groundwater table to empty out ground starage capaity, then, diverting lower minelization surface water flush salinity in soil.The paper calulated affective radius on single well, quantity of pourings out water, adjustable reserves of ground water and adjustable salinity reserve of ground water.

Key words: Huang-Huai-Hai