Impact assessment of negative environmental effects on groundwater in the Haidong diversion tunnel on the east side of the Erhai Sea,Yunnan Province,China
Negative effects on the groundwater environment due to tunnel construction have occurred from time to time,seriously affecting tunnel construction safety and the quality of the surrounding groundwater environment. Based on AHP hierarchical analysis method and fuzzy comprehensive evaluation method,this paper combines the geological and environmental background characteristics of the southwest region to select the weights of the indicators in the negative environmental effect evaluation system,and evaluates the negative environmental effect of groundwater in a diversion tunnel on the east side of the Erhai Sea in Yunnan. The evaluation showed:The negative environmental effects of a diversion tunnel on the east side of Erhai Lake in Yunnan Province are mainly Ⅲ level( medium),the main negative environmental effects of the diversion tunnel during and after construction are obvious water gushing disaster( flow rate<8 000 m3/d),at the same time,the groundwater level in some areas near the diversion tunnel decreases,the surface water flow around the tunnel decreases and the spring flow near Fengweiqing-Dacheng Village decreases.
万方数据
维普
