H 연구지역의 수리지질-수리분산특성과 지하수 오염가능성 평가 연구

• 발행기관: 대한자원환경지질학회
• 저자명: 한정상
• 간행물 정보: 『자원환경지질』27권 3호, 295~311쪽, 전체 17쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1994.06.30

영문 초록

A comprehensive in-situ tests are performed to define the hydrogeologic and hydrodispersive characteristics such as hydraulic conductivities, and average linear velocities as well as conducting flow-net analysis at the study area. The results show that the study area is very heterogeneous so that hydraulic conductivities range from 6.45×10-7 to 1.15×10-5 m/s with average linear velocities of 0.34∼0.62m/day. Whole groundwater in upper-most aquifer is discharging into the sea with specific discharge rate of 7.2×10-3 to 1.3×10-2m/day. The longitudinal dispersivity of the aquifer is estimated about 4.8m through In-situ injection phase test. The area is highly vulnerable to potential contaminant sources due to it s high value of DRASTIC index ranging from 139 to 155 and also under water table condition with very shallow groundwater level. To delineate contaminant plumes of toxic NaOH and carcinogenic benzene when these substances are assumed to be leaked through existing TSDF at the study area by unexpected accidents or spill, Aquifer Simulation Model (ASM) including Flow and Transport Model is used. Te simulated results reveal that the size of NaOH plume after 5 years continuous leak is about 250×100m and benzene after 10 years, 490×100m. When the groundwater is abstracted about 50 days, which is maximum continuously sustained no-precipitation period during 30 years, with pumping rate of 100m3/day, THWELL program shows that the groundwater is adversly affected by sea water intrusion.

키워드

수리지질 수리분산 지하수 오염