Survey on the Precipitation Component in Iri Area of Chonbuk Province

전북(全北) 이리지역(裡里地域)의 강수성분(降水成分) 조사(調査)

  • Kang, Jong-Gook (National Honam Agricultural Experiment Station, RDA) ;
  • Shim, Hyeong-Kwon (National Honam Agricultural Experiment Station, RDA) ;
  • Lee, Jong-Sik (Agricultural Science and Technology Institute, RDA) ;
  • Kim, Jong-Gu (National Honam Agricultural Experiment Station, RDA) ;
  • Lee, Jae-Kil (National Honam Agricultural Experiment Station, RDA) ;
  • So, Jea-Don (National Honam Agricultural Experiment Station, RDA)
  • Published : 1995.04.30

Abstract

This study was carried out to investigate the deposition aspect of acid precipitation in rural area of Chonbuk province by analysis of the chemical components in the precipitation at National Honam Agricultural Experiment Station, RDA in the suburbs of Iri from Jan. to Dec. in 1992. The results are summarized as follows: 1. The frequency of acid precipitation was 82.5% in 1992 and the month of the lowest frequency of 17% was June. 2. The pH range of the most precipitation amount was pH $4.5{\sim}5.0$ of 54.0% and the amount and ratio of the precipitation below pH 4.0 were 9.6 mm and 1.1%, respectively. 3. The seasonal acidity of precipitation was Summer(4.78)>Fall(4.59)>Spring(4.52)>Winter(4.16). 4. The components showed significant correlation with pH value were $SO_4^{2-}$ and $NO_3$ and the equivalence ratio between two components was 2.85 : 1. 5. The order of the major ion concentration in the precipitation was $SO_4^{2-}$>$NH_4^+$>$Cl^-$>$Ca^{2+}$>$NO_3^-$>$Na^+$>$H^+$>$K^+$>$Mg^{2+}$ and the equivalence ratio of total anion to cation was 1.20. 6. Deposition amount of nitrogen ($NO_3-N$ + $NH_4-N$) and potassium ($K_2O$) were 1.19 and 0.53 kg/l0a/year, respectively.

전북 평야지역의 산성(酸性)비 강수양상(降水樣相)을 파악하기 위하여 이리시(裡里市) 교외에 위치한 호남농업시험장 내에서 1992년 1월부터 12월까지 강수(降水)의 화학적(化學的) 조성(組成)을 분석 조사한 결과를 요약하면 다음과 같다. 1. '92년 산성비 출현율(出現率)은 연평균(年平均) 82.5%이었으며 6월이 17%로 가장 낮았다. 2. pH 수준별 강수량 분포(分布)는 pH $4.5{\sim}5.0$의 범위가 54.0%로 가장 많았으며 pH 4.0 이하의 강수(降水)는 9.6 mm로 연강수량(年降水量)의 1.1%이었다. 3. 강수(降水) PH를 계절별로 보면 여름(4.78)>가을(4.59)>봄(4.52)>겨울(4.16)의 순(順)으로 높은 경향이었다. 4. 강수(降水)의 pH 감소(減少)와 상관(相關)이 높은 성분은 $SO_4^{2-}$$NO_3^-$이었으며 두 성분(成分)의 당량비(當量比)는 2.85:1 이었다. 5. 강수성분조성(降水成分組成)은 $SO_4^{2-}$>$NH_4^+$>$Cl^-$>$Ca^{2+}$>$NO_3^-$>$Na^+$>$H^+$>$K^+$>$Mg^{2+}$의 순(順)으로 함량이 높았으며 음이온의 양이온에 대한 당량비(當量比)는 1.20이었다. 6. 질소($NO_3-N$ + $NH_4-N$)와 칼리($K_2O$)의 연강하량(年降下量)은 각각 1.19, 0.53 kg/10a ${\cdot}$ year이었다.

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