Application of GMS in numerical simulation of valley flood storage capacity

The ecological base flow can maintain basic ecological environment function of rivers and lakes. In order to safeguard the ecological base flow, with regard to the geological and hydraulic conditions of JinLing River valley, the paper systematically analyzed the strata, storage space, water source and advantageous areas for adjusting groundwater storage. Aimed at the adjustment of groundwater reservoir, the project was set up and taken by using local flood to supply the groundwater storage. In the paper, the great contribution effect of local flood adjustment to river base flow was comprehensively studied by use of the groundwater model established by Ground water modeling system (GMS) software in the studying area. As the flood duration is approximately 1.5 days in the study area, the base flow of river increases by 78.3 percentages. To a large extent, the flood lasts 200 days in the groundwater storage. The study shows that the groundwater storage dramatically improve the base flow of river and supply the river´s base flow during the period of dry seasons. Valley flood storage model will provide the powerful technical support for ecological base flow of the river.