为了改良盐渍化土壤，合理开发浅层咸水资源。以华北滨海盐渍化土壤及浅层地下水为研究对象，通过建立HYDRUS-MODFLOW耦合模型，利用水平井试验区实测土壤、气象、抽水试验数据等资料，探讨了水平井不同排水方式下地下水位的动态变化特征。结果发现，试验区地下水蒸发深度在2.5m左右；以降低潜水位至临界深度为控制标准，单条水平井可以控制土地面积约为100亩；并且控制范围随着年抽水量呈现同步增长；同时，连续型和间歇型排水均能有效降低地下水位，使得包气带水分通量总体向下运行，土壤盐碱化得到有效控制。

To improve saline soil and exploit shallow salt groundwater reasonably，this paper selects the saline soil and shallow groundwater in coastal plains of North China Plains as major research objects． The dynamic characteristics of groundwater level in different drainage methods of the horizontal wells are discussed． Based on the coupling model of the Hydrus －Modflow，the measured data of soil，meteorology are combined with the pumping test in the horizontal well test area． Under natural conditions，the limit-evaporable depth is about 2．5 meters in experiment areas． Single horizontal wells can reduce the groundwater level of 6．67 hm2 arable land over critical water level． And the control range is growing in step with annual pumping capacity by reducing groundwater level to critical groundwater level． Meanwhile，continuous and intermittent drainage measures can reduce the phreatic water level effectively and run the water flux of aeration zone down integrally． As a result，the soil salinization can be controlled validly．