Study on Salinization of Reservoir under the Influence of Saline Groundwater
Salinization of reservoir will affect domestic water,agricultural irrigation and sustainable utilization of water.Previous research focused on the salt release of sediment.There are few researches on the influence of groundwater on sa-linization of reservoir.This study took Beidagang Reservoir in Tianjin as the research area and conducted the indoor col-umn experiment using reservoir water at different sampling points.This study analyzed the vertical dynamic change law of TDS,Cl-and hydrogeochemical changes to reveal the mechanism of salinization of reservoir.The results show that TDS and Cl-went through three periods:the resting periods,the rising periods and the dynamic equilibrium periods.In the first week after the injection of groundwater,there are no signifiicant changes in TDS and Cl-concentration.After one week,it went through the rapid rising period about 30 days and reached the dynamic equilibrium period at a later stage.There was a concentration gradient in the vertical direction with the highest concentration of TDS and Cl-in the bottom layer.There was a diffusion boundary layer and the concentration in the boundary layer changes more than that outside the boundary layer.The TDS concentrations at 10cm depth are 13.59 ρ0 and 4.52 ρ0,and those at 30cm depth are 6.82 ρ0 and 1.97 ρ0.The release fluxes of TDS and Cl-went through three stages:fluctuation stage(1～14 d),rising stage(15～44 d)and descent stage(45～106 d).The ions ratio indicated that hydrochemical component derived from evaporite,carbonate rock and sulfate minerals.
Beidagang Reservoirsalinization of reservoirsaline groundwatercolumn experimentrelease fluxion sources
万方数据
维普
