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工程治沙技术的应用日益广泛,机械沙障是最早应用于防治风沙危害的工程措施之一,然而对于机械沙障如何影响沙土物理性质的研究较少。利用中子水分仪和温度计,对宁夏沙坡头地区两种机械沙障组合(直立式沙障+平铺式沙障)下不同土层的土壤含水量和温度进行测定分析,以未铺设沙障的裸沙为对照,为揭示工程固沙措施间接防风固沙机理提供科学依据。结果表明:机械沙障布设初期,直立式沙障加平铺式双层网明显提高了土壤温度,但随着布设时间的推移逐渐趋于稳定;机械沙障直接影响着土壤水分的再分配,不同机械沙障组合对土壤水分的再分配有着不同的影响,且有一定的蓄水保水作用。
The application of engineering sand control technology is increasingly widespread. Mechanical sand barrier is one of the earliest applied engineering measures to prevent and control wind and sand hazards. However, there is less research on how mechanical barrier affects the physical properties of sand. Using neutron moisture meter and thermometer, the soil water content and temperature in different soil layers of two mechanical sand barrier combinations (upright sand barrier + tiled sand barrier) in Shapotou area of Ningxia were measured and analyzed. Barrier bare sand as a control, in order to reveal the project of sand fixation and indirect windbreak mechanism to provide a scientific basis. The results show that the vertical sand barrier and tiled double-layer net increased the soil temperature obviously at the initial stage of mechanical sand barrier laying, but gradually stabilized with the laying time; the mechanical sand barrier directly affected the redistribution of soil moisture, Mechanical sand barrier combinations have different effects on the redistribution of soil moisture and have a certain water and water retention effect.