短时强降雨下平原区域浅层地下水入渗补给规律研究

以豫东平原惠北试验区为研究区域,根据研究区域包气带土壤蓄水库容、土壤前期含水量、地表径流、潜水蒸发量等资料数据计算地下水入渗补给规律,确定降雨对地下水的补给系数.研究结果显示:单次短时强降雨条件下,降雨强度与研究区域浅层地下水入渗补给系数呈反比例关系;当降雨强度一致时降雨量与研究区域浅层地下水入渗补给系数呈正比例关系,在降雨强度低于15 mm/h的条件下,降雨量主要用于补充包气带缺失的水分和土壤、作物、植物等的蒸发蒸腾消耗,无法对研究区域浅层地下水进行有效补给.

Study on Recharge Low of Shallow Groundwater Infiltration in Plain Area under Short-term Heavy Rainfall

Taking Huibei experimental area of East Henan Plain as the research area, the recharge law of groundwater infiltration was calculated according to the data of soil moisture storage capacity in the aeration zone, antecedent soil moisture content, surface runoff and phreatic evaporation, and the recharge coefficient of rainfall to groundwater was determined. The results showed that under the condition of single short term heavy rainfall, the rainfall intensity was inversely proportional to the recharge coefficient of shallow groundwater in the study area. When the rainfall intensity was consistent, the rainfall intensity was positively proportional to the recharge coefficient of shallow groundwater in the study area. When the rainfall intensity was below 15 mm/h, the rainfall mainly supplemented the water lost in the aeration zone and the evapotranspiration of soil, crops and plants, which could not effectively recharge the shallow groundwater inflow in the study area.