基于地下水动力学模型的河流廊道潜水埋深研究

A Study of Depth of Unconfined Groundwater of River Corridor Based on Groundwater Dynamical Model

荒漠绿洲实质就是河流廊道及其影响区,其水分主要来源于河流径流补给,河流下泄水量的多少直接影响到河流廊道的安全与否。建立了适合干旱区河流廊道的地下水动力学模型,并提出了生态保护距离和潜水埋深参数的设定方法。研究认为,在生态保护目标确定后,通过分析河道渗漏补给的有效影响范围、植被生存所需的潜水埋深与河岸处潜水埋深的相关关系,确定河岸处潜水埋深,进而为制定河流下泄流量,保护干旱区河流廊道的生态输水提供技术支撑。

The desert oasis is actually the river corridor and its area affected, whose water is mostly from the supply of river flow, and the amount of the water released directly influences the safety of river corridor. This paper sets up a groundwater dynamical model appropriated to river corridor in arid area, and puts forward to an approach to set the distance for ecosystem protect and the parameter of depth of unconfined groundwater. The research considered that after the determination of ecosystem protect objective, we can decide the riverine depth of unconfined groundwater through analyzing the effective area affected by river seepage discharge and the mutual relation between depth of unconfined groundwater for vegetation survival and the riverine depth of unconfined groundwater, then provide the technical support for setting the discharge amount for river releasing and protecting the ecological intake of river corridor in arid area.