Survey on the Rain Components in Kyungbuk Province

경상북도(慶尙北道) 지역(地域)의 강수성분(降水成分) 조사(調査)

This study was carried out to investigate the chemical characteristics of the rain water in rural, urban and industrial areas which are located in Kyongbuk province, namely. Songju, Kumi, Kimchon, Yongdok and Teagu. The experiments were sampled the rain by amount of rain water from July to August in 1989, and analyzed the pH. EC, $SO_4\;^{2-}$, $NO_3^-$ and $Cl^-$ contents in the rain water. The results are summarized as follows : 1. The acid rain showed at the begining rain water of all surveyed sites, but there were difference by sites, and particulary severe in Kumi. 2. The content of $SO_4\;^{2-}$ in rain water was high in urban and industrial area, such as Teagu, Kumi and Kimchon. 3. According to the increasing rain water amount, the pH in rain water was high, and the contents of other components were low. This phenomenon remarkably presented at higher concentration of components and earlier rain water. 4. The electric conductivity was high significantly positive correlation with contents of $SO_4\;^{2-}$, $NO_3\;^-$ and $Cl^-$ in rain water, and pH was high significantly negative correlation with contents of $SO_4^{2-}$ and $NO_3\;^-$ in rain water, respectively.

경북도내(慶北道內)에 위치한 성주, 구미, 김천, 영덕, 대구 등(等) 5개(個) 지역(地域)을 대상(對象)으로 1989년(年), 7월(月)${\sim}$8월(月) 사이에 강우량별(降雨量別)로 강우중(降雨中) pH. EC, $SO_4^{2-}$, $NO_3^-$, $Cl^-$ 등(等)의 함량(含量)을 분석조사(分析調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 조사지역(調査地域)에서 모두 초기강우(初期降雨)에는 산성우(酸性雨)로 나타났으며, 그 정도(程度)는 지역(地域)에 따라 차이(差異)가 있었지만 구미지역에서 가장 심(甚)하였다. 2. 강우중(降雨中) $SO_4^{2-}$함량(含量)은 도시(都市) 및 공업지역(工業地域)인 대구, 구미, 김천지역에서 높았다. 3. 강우량(降雨量)이 증가(增加)할수록 pH는 높아지고, 기외성분(其外成分)은 감소(減少)되었는데, 이러한 증감(增減)의 정도(程度)는 강우량(降雨量) 초기(初期)(2∼4 mm)와 함량(含量)이 높은 성분(成分)일술록 현저하였다. 4. 전기전도도(電氣傳導度)는 강우중(降雨中) $SO_4^{2-}$, $NO_3^-,\Cl^-$ 함량(含量)이 높을수록 높아졌으며, pH는 강우중(降雨中) $SO_4^{2-}$ 및 $NO_3^-$함량(含量)이 높을수록 낮아졌다.