Abstract:

Groundwater recharge is an important way of water management strategies, including the natural recharge and artificial recharge. The study of groundwater recharge test as Baoshan District of Shanghai for example, with preliminary geological, hydrogeological exploration results, the purpose of filtering out the appropriate level of recharge (the fourth aquifer), establishing of recharge test hydrogeological conceptual model accorded to the aquifer permeability, hydraulic gradient, the main mineral composition and other basic properties. Then take TOUGHREACT for the numerical simulation platform, which software of non-isothermal multiphase flow and transforming simulation, to predict the quality of groundwater after recharging. The results show that chemical composition of groundwater is mainly affected by mixing, cation exchange adsorption and dissolution of aquifer minerals and so on; waterrock interaction process of quartz, dolomite, feldspar, albite Stone and montmorillonite dissolves, calcite precipitation, illite and kaolinite precipitation is first dissolved, but the amount of mineral reaction and weak. Program at different pressure recharge, water level recovery rate with increasing of pressure, but the chemical composition of groundwater trends is almost free from pressure.

Key words: artificial recharge, groundwater, multi-component, TOUGHREACT, water-rock interaction