임도개설(林道開設)이 산지급류소하천(山地急流小河川)의 전기전도도(電氣傳導度)와 이온농도(濃度)에 미치는 영향 - 임도개설지(林道開設地)와 미개설지(未開設地) 비교(比較) -

Effects of Forest Road Construction on Electronic Conductivity and Ion Concentrations of Torrential Stream - Comparison of Forest Road Construction and Control Watersheds -

  • Kim, Min-Sik (Department of Forestry, Graduate School, Kangwon National University) ;
  • Chun, Kun-Woo (Department of Forestry, College of Forest Sciences, Kangwon National University) ;
  • Ezaki, Tsugio (Department of Bioresources, College of Agriculture, Ehime University)
  • 발행 : 1997.06.30

초록

강원대학교(江原大學校) 산림과학대학(山林科學大學) 부속연습림내(附屬演習林內)의 임도밀도가 상이한 세 유역(유역 A: 8.82m/ha, B: 2.32m/ha 및 C: 미개설(未開設))의 산지급류소하천(山地急流小河川)을 대상으로 1995년, 1996년의 강우량(降雨量) 및 유출량(流出量)에 따른 전기전도도와 이온농도를 분석한 결과는 다음과 같다. 1. 전기전도도는 강우량에 따라 크게 변화하지 않았으나 대체로 전강우(前降雨)와 간격이 긴 경우가 높게 나타났으며, 임도개설유역이 미개설유역보다 높게 나타났다. 2. 이온성분별 농도는 음이온이 양이온보다 약 2배이상 유출되었다. 이온별 평균농도는 양이온의 경우 $Na^+$$Ca^{2+}$이 각각 최대 및 최소로 나타났으며, 음이온의 경우는 $SO_4{^{2-}}$$Cl^-$보다 3.7배 이상 높게 나타냈다. 3. 총이온농도는 강우량과 유출량에 민감하게 반응하지는 않았으나 양이온의 경우 임도개설지가 미개설지보다 높게 나타났다.

This study examined the effect of forest road construction on electronic conductivity(EC) and ion concentrations under different precipitation. They were torrential streams within three different watersheds with various forest road densities (watershed A : 8.82m/ha, watershed B: 2.32m/ha, and watershed C: control) in the Experimental Forest of Kangwon National University. The results were as follows: 1. EC of three watersheds did not show on difference in precipitation, but it was high in case of long interval rainfall time period. EC of watershed A and B were higher than that of watershed C. 2. Concentrations of cation was about 2 times higher than those of anion. Average concentrations of $N^+$ and $Ca^{2+}$ showed maximum and minimum respectively, and $SO_4{^{2-}}$ was 3.7 times higher than $Cl^-$. 3. Precipitation and discharge had no effect on ion concentrations, but watershed A and B were higher in concentrations of cation than watershed C.

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