溹泸河河道入渗能力试验

Experiment on the infiltration capacity of Suoluhe River

"引黄入冀"工程冬四月引水存在与当地灌溉时间严重不匹配的问题,如何科学储存和利用宝贵的引黄河水资源,是急需研究和解决的问题,而地下水库则是科学合理储存水资源的有效途径之一。选择南宫市溹泸河河道,进行河道入渗能力大型试验研究,利用水均衡法计算溹泸河河道入渗能力,分析入渗能力的大小对地下水位变化幅度的影响,计算溹泸河北段河道入渗场适宜的引水流量。结果表明:动水条件稳定的入渗能力为0.13 m/d,静水条件稳定的入渗能力为0.11 m/d;溹泸河北段的合理引水流量为0.48 m^(3)/s;入渗初期地下水位响应滞后时间较长,随着入渗时间的延长,地下水位响应滞后时间缩短,且地下水位增速变缓。通过试验研究,获取了南宫市规划地下水库建设论证需要的重要水文地质参数,为南宫市规划地下水库的科学建设提供技术理论支撑,为古河道带区地下水库河道入渗方式的研究提供理论基础。

In recent years, many scholars worked on river leakage calculation methods.However, the large-scale infiltration test for the pre-construction of underground reservoirs in the ancient river area of China is still lacking.The Suoluhe River is taken as an example for large-scale river infiltration test, and the water balance method is applied to calculate the infiltration capacity to study the mechanism of the response of groundwater level to infiltration capacity to provide a certain scientific basis and reference for the construction of underground reservoirs in ancient river areas.The water balance method was adopted for calculating the river water storage by taking the total recharge water minus the total discharge.Evaluation of river infiltration capacity: Initial stage of infiltration under unstable moving water conditions, the stable infiltration capacity is 0.06 m/d;Infiltration stage under still water condition Ⅰ,the stable infiltration capacity is 0.11 m/d;Infiltration stage under stable moving water conditions, the stable infiltration capacity is 0.13 m/d;Infiltration stage under still water condition Ⅱ,the stable infiltration capacity is 0.08 m/d.Lag mechanism of groundwater level′s response time: Initial stage of infiltration under unstable moving water conditions, the response time of the water level is two days behind;Infiltration stage under still water condition Ⅰ,the response time of the water level is one day behind;Infiltration stage under stable moving water condition, the response time of the water level is one day behind;Infiltration stage under still water condition Ⅱ,the response time of the water level is one day behind;Response mechanism of groundwater level: Initial stage of infiltration under unstable moving water conditions, the stable infiltration capacity is 0.06 m/d, the average daily variation of groundwater level is 0.41 m;Infiltration stage under still water condition Ⅰ,the stable infiltration capacity is 0.11 m/d;the average daily variation of groundwater level is 0.19 m;Infiltration stage under stable moving water conditions, the stable infiltration capacity is 0.13 m/d, the average daily variation of groundwater level is 0.09 m;Infiltration stage under still water condition Ⅱ,the stable infiltration capacity is 0.08 m/d, the average daily variation of groundwater level is 0.02 m.With the extension of infiltration time, the response lag time of groundwater level is shortened, and the increased speed of groundwater level is slowed down.A series of important hydrogeological parameters for the preliminary construction of underground water reservoir are obtained in Suoluhe River.Enriching the research theory of underground reservoirs, and promoting the construction of underground reservoirs in ancient river areas, it has important reference significance for other similar ancient river areas to regulate, store and utilize external water transfer.The deficiency of this study is that the study on the dispersion and diffusion of the groundwater mound is not enough.