The Study Of The Interaction Rule Between Surfacewater And Groundwater In The Upstream Of Zhanghe River

In the hydrologic cycle, the surface water and groundwater were considered as aunified whole. They had the closly hydraulic connection. The interaction rule betweenthem could affect the distribution rule of water yield in water cycle.With the rapid growth of the population, social economy, industry andagriculture, the demand of water resources of people was increased. The ZhangheRiver was the important water resource of drinking, industrial and agriculturalproduction for Shanxi, Hebei and Henan provinces. The water and soil resources werescarce. That resulted this region had serious imbalance between supply and demand.This paper was used the surface water and groundwater in the upstream of ZhangheRiver as the object. it was used the laboratory test and numerical simulationtechnology to study the interaction rule between surface water and groundwater.Compared the measured and theoretical data, the measured data was closer withthe theoretical data. This equation could reflect the interaction rule at water level andwater yield. It also could offer the theoretical basis for numerical simulation. At thecondition of groundwater recharging river, there were two concave value on theinfiltration characteristics. That showed that there had two fissures.The lationship between excretion and water level was shown. The porousmedium (pore water) and the triple medium(pore-karst-fissure water) had the sameregular. Under the same water level of river, the excretion was decreased with theincrease of groundwater level, and increased with the decrease of groundwater level.Under the same groundwater level, the excretion was increased with the increase ofthe level of river, and decreased with the decrease of the level of rivre. The excretionwas linear with the water level approximately.The coupling numerical model of surface water and groundwater was established.The boundary conditions, initial conditions, model parameters were selected.MODFLOW was used as the numerical model. By discriminated the modelparameters and verificated the model, Xin’an Spring had the characteristics of thetypical karst groundwater in northern China. It satisfied the characteristics of the karstgroundwater in northern China. The outcomes of model fitting between groundwaterlevel and the discharge of spring were good. The peak excretions of spring lagged behind the peak of rainfall5-6months.83%of groundwater recharge was fromrainfall infiltration.15%of groundwater recharge was from river leakage.2%ofgroundwater recharge was from lateral reservor.76%of groundwater excretion wasout of surface as spring. The other24%of groundwater excretion was used for humanactivities. That indicated the groundwater numerical model could be used to simulateand predict the groundwater level and the flow of spring area.