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首页> 外文期刊>Applied Engineering in Agriculture >Enhancing Groundwater Recharge with Sand Ditches
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Enhancing Groundwater Recharge with Sand Ditches

机译：用沙沟加强地下水充电

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Localized and artificial groundwater recharge is an important water management strategy in arid regions. However, artificial recharge is limited by the hydraulic characteristics of surface soil which control downward water percolation to the aquifers.In heavy soils with low infiltration and hydraulic conductivity rate, water percolation can be enhanced by constructing deep ditches filled with highly permeable materials, such as sand. Laboratory experiments were conducted to examine the effect of constructing a deep sand ditch across the slope of a soil box (50 x 20 x 25 cm3) on runoff and deep percolation to the drainage outlet of the soil box. A sandy loam soil packed in two bulk densities (1200 and 1500 kg/m~3) was used for the experiments. The experiments were carried out using simulated steady runoff of about 300 mL/minfor a duration of 60 min. Experimental results showed that sand ditches greatly enhanced water deep percolation in soils but their relative effect was more profound in compactedhigh-density soil compared to soil having low-density. The drainage water collected from compacted soil boxes in the presence of sand ditches increased by 10 times compared to control soil without sand ditches. In the case of low-density soil, the presence of sand ditches eliminated the runoff but the increase in drainage water was about 18% compared to control. The experimental results clearly revealed that creating high infiltration zones within the soil matrix, such as sand ditches, significantly increased water deep percolation and herewith groundwater recharge in drylands, especially in heavy soils.
机译：本地化和人造地下水补给是干旱地区的重要水管理策略。然而，人工补给受到表面土的液压特性的限制，该表面土壤的液压特性控制向下的水渗透到含水层。在具有低渗透和液压电导率的重物中，通过构造填充具有高渗透材料的深沟，可以提高水渗透，例如沙。进行了实验室实验，以检查在径流箱（50×20×25cm3）的坡度横跨土箱（50×20×25cm3）的坡度和深层渗透到土箱的排水出口的效果。在两个散装密度（1200和1500 kg / m〜3）中填充的砂土土壤用于实验。使用约300ml / min的模拟稳定径流进行实验，持续60分钟。实验结果表明，沙沟大大增强了土壤中的水深渗透，但与具有低密度的土壤相比，它们的相对效果更加深刻。与无砂沟的土壤相比，从压实的土箱中收集的排水水增加了10次。在低密度的土壤的情况下，与对照相比，砂沟的存在消除了径流，但随着对照，引流水的增加约为18％。实验结果清楚地揭示了在土壤中产生高渗透区，例如砂沟，显着增加水深渗透，并且在旱地中的地下水充电，特别是在重症土壤中。

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