한국농림기상학회지, 제 6권 제4호(2004) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 6, No. 4, (2004), pp. 250~255
ⓒ Author(s) 2014. CC Attribution 3.0 License.


수원 및 태안지역 영농기 강우의 화학적 특성

이종식, 정구복, 신중두, 김진호
농업과학기술원 환경생태과

(2004년 11월 15일 접수; 2004년 12월 03일 수락)

Chemical Properties of Rainwater in Suwon and
Taean Area during Farming Season

Jong-Sik Lee, Goo-Bok Jung, Joung-Du Shin, Jin-Ho Kim
National Institute of Agricultural Science and Technology, RDA, Suwon, Korea

(Received November 15, 2004; Accepted December 03, 2004)

ABSTRACT
This study was carried out to investigate the chemical properties of rainwater in the Suwon and Taean areas. Rainwater was collected during the farming seasons of 2002 and 2003. The number of samples collected in Suwon and Taean were 69 and 71, respectively. These were analyzed for chemical composition. The pH of samples collected in April was higher than those collected after June. The most common range of rainwater pH was 5.0-5.6 in Suwon and 4.5-5.0 in Taean during investigation periods. The neutralization capacity of rainwater acidity by Ca2+ and NH4+ was decreased during the rainy season. The EC of rainwater was lower during the rainy season. Cation concentrations in rainwater were N H4+>H+>Ca2+>Mg2+>K+ in Suwon and Ca2+>NH4+>H+>K+>Mg2+ in Taean. In the case of anion, the order was SO42->NO3->Cl- in Suwon and S O42->Cl->NO3- in Taean. The mean values of sulfate in rainwater were 130 μeqL-1 in Suwon and 117 μeqL-1 in Taean. The ratio of non-sea salt sulfate to sulfate (nss-SO42->SO42-) was 89% and 88%. This implies that the major origin of sulfate in rainwater might be anthropogenic.ht be anthropogenic..

Keyword: Rainwater, Acidity, Chemical composition, nss-(non-sea salt sulfate)

MAIN

적요

수원과 태안 지역에서 영농기간 중 강우의 화학적 특성을 알아보기 위하여 2002년 및 2003 년 2년간 각각 69점 및 71점의 빗물을 채수하여 화학적 성분조성과 강우량을 고려한 가중평균(volume-weighted mean) 이온농도 변호를 조사한 결과는 다음과 같다.
조사 기간 중 pH별 강우 분 포는 수원은 pH 5.0~5.6 범위가 가장 많았으며, 태안은 pH 4.5~5.0 범위가 많았다. 연차별로는 수원지역은 2002년도에 비해 2003년도에 pH 5.6 이상의 강우 분포가 크게 줄어든 반면, pH 4.0~5.0 범위의 강우가 증가하는 경향을 보였고, 태안지역은 pH 5.0 이상의 강우가 증가하고 pH 4.0~5.0 범위의 강우 분포가 줄어드는 경향을 나타내었다. 강우의 산성도 중호는 강우량이 많은 시기가 다른 기간에 비해 낮게 나타났다. 빗물의 EC농도는 강우량이 많았던 7윌 이후 낮은 농도를 보이다 강우량이 적었던 10윌 이후 다시 증가하는 경향을 나타내었으며, 평균 농도는 지역별로 큰 차이를 보이지 않았다. 빗물중 양이온은 수원지역이 NH4+>H+>Ca2+>Mg2+>K+의 순이었으며, 태안지역은 Ca2+>NH4+>H+>K+>Mg2+의 순으로 나타났다. 음이온은 수원지역이 SO42->NO3->Cl-, 태안지역은 SO32->Cl->NO3-순이었다. 빗물 중에 용존하는 sulfate의 평균 함량은 수원과 태안지역이 각각 130과 117 μeqL-1이었 으며, 총 sulfate 함량 중 nss-SO42- 함량은 수원과 태안 지역이 각각 89% 및 88% 로 나타나 대부분이 인위적인 발생원에서 기인된 것으로 판단되었다.

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