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북한강 수계 충적평야 지역 토지이용과 지하수 수질간의 관계
최중대,류순호,Choi Joong-dae,Ryu Soon-ho 한국관개배수위원회 2000 한국관개배수논문집 Vol.7 No.2
The effect of land use of an alluvial watershed in the upper North Han river basin on groundwater quality were investigated. Existing 20 farm wells were selected as monitoring wells representing different land uses of residential, arable(paddy and field),
최중대(Joong Dee Choi),장석오(Seok Oh Jang),최병용(Byung Yong Choi),류순호(Soon Ho Ryu) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.3
The effects of land use in a small agricultural alluvial watershed on groundwater quality were investigated. Existing 20 farm wells were selected as monitoring wells representing different land uses. EC, T-N, NO₃-N, NH₄-N, Org-N, T-P and Cl^- concentrations were monitored every 2 weeks or 1 month for 1 to 2 years. EC was low at the upper watershed and increased towards the lower watershed. Average EC of natural water quality area of the upper most watershed was 0.077 dS/m and was 14∼38% of the ECs of the other land uses. Average NO₃-N concentrations of greenhouse, livestock and residential land uses exceeded the 10 ㎎/1 limit for drinking water. Org-N and NH₄-N concentrations were relatively small compared to NO₃-N concentration and T-N concentration was mostly affected by NO₃-N concentration. NO₃-N concentration occupied more than 90% of T-N concentration of paddy and upland areas. T-N concentration was higher after growing season than during growing season. T-P concentrations did not show any trend with respect to time and land use. Correlations between EC and T-N and EC and Cl^- were analyzed and the R² were 0.7706 and 0.6567, respectively. Monthly amount of rainfall appeared to be influential to groundwater quality and long-term monitoring studies were suggested to consider the effect of rainfall on groundwater quality.