本文選題：水平井 + 農(nóng)田排水��； 參考：《中國農(nóng)村水利水電》2017年09期

【摘要】：為了改良鹽漬化土壤,合理開發(fā)淺層咸水資源,以華北濱海鹽漬化土壤及淺層地下水為研究對象,通過建立Hydrus-Modflow耦合模型,利用水平井試驗(yàn)區(qū)實(shí)測土壤、氣象、抽水試驗(yàn)數(shù)據(jù)等資料,探討了水平井不同排水方式下地下水位的動態(tài)變化特征。結(jié)果表明,在天然狀態(tài)下試驗(yàn)區(qū)地下水蒸發(fā)深度在2.5 m左右;以降低潛水位至臨界深度為控制標(biāo)準(zhǔn),單條水平井可以控制土地面積約6.67 hm~2;并且控制范圍隨著年抽水量呈現(xiàn)同步增長;同時,連續(xù)型和間歇型排水均能有效降低地下水位,使得包氣帶水分通量總體向下運(yùn)行,土壤鹽堿化得到有效控制。
[Abstract]:In order to improve the salinized soil and develop the shallow salt water resources reasonably, taking the salinized soil and the shallow groundwater of North China as the research object, by establishing the Hydrus-Modflow coupling model, using the measured soil and meteorology in the horizontal well test area, Based on the data of pumping test, the dynamic characteristics of groundwater table under different drainage modes in horizontal wells are discussed. The results show that the evaporation depth of groundwater in the test area is about 2.5 m under the natural condition, and the control standard is to reduce the groundwater level to the critical depth. A single horizontal well can control the land area of about 6.67 hmm2, and the control range increases synchronously with the annual pumping capacity. At the same time, both continuous and intermittent drainage can effectively reduce the groundwater level and make the water flux of the aeration zone run downward. Soil salinization was effectively controlled.
【作者單位】： 吉林大學(xué)環(huán)境與資源學(xué)院;中國地質(zhì)調(diào)查局水文地質(zhì)環(huán)境地質(zhì)調(diào)查中心;河北地質(zhì)大學(xué)水資源與環(huán)境學(xué)院;
【基金】：中國地質(zhì)調(diào)查局地質(zhì)調(diào)查項(xiàng)目(12120113103300,121201012000150018)
【分類號】：S156.4
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本文編號：2045186