Experiment on the infiltration capacity of Suoluhe River
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Abstract:
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.
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