关中盆地洪积扇区地下水位与河道生态流量相关性研究

Study on the correlation between groundwater level and river ecological discharge in the alluvial fan area of Guanzhong Basin

通过平均河流计算模型和水位流量关系曲线,得到各水文站断面生态水位,考虑最不利情形,利用河流比降和地形条件折算出洪积扇扇边生态水位,建立关中盆地洪积扇区地下水位与河道生态流量的相关性。结果表明:目前关中盆地洪积扇区地下水位较地下生态水位均有不同程度的富余,其中渭河北岸北山山前洪积扇区富余量显著多于渭河南岸秦岭与华山山前洪积扇区,地下水位均满足持续补给河道生态流量条件。

Based on the average River calculation model and water level-discharge curve,the ecological water level of each hydrological station section is obtained.Taking into account the most disadvantageous situation,the ecological water level at the edge of the alluvial fan is calculated by using the river gradient and topographic conditions,and the correlation between the groundwater level and the ecological flow of the river channel in the alluvial fan area of Guanzhong Basin is established.The results show that the groundwater level in the alluvial fan area of Guanzhong Basin is more abundant than that in the underground ecological water level.The abundant amount in the piedmont alluvial fan area of Beishan on the Northern Bank of Weihe River is significantly more than that in the piedmont alluvial fan areas of Qinling and Huashan Mountains on the southern bank of Weihe River.The groundwater level satisfies the conditions of River ecological discharge continuous recharge.