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산림소유역 유출수의 비강우일 비점오염물질 농도 변화 및 유출 특성 분석
유현주 ( Yoo Hyeon-ju ),최형태 ( Choi Hyung-tae ),김재훈 ( Kim Jae-hoon ),임홍근 ( Lim Hong-geun ),양현제 ( Yang Hyun-je ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2020 한국환경복원기술학회지 Vol.23 No.6
This study was carried out to analyze the monthly runoff concentration on non rainfall days in order to prepare basic data to compare the runoff concentration on rainfall days in 7 forest watersheds in the Republic of Korea. Forest stream water has been collected through 15 times of sampling in each watershed and analyzed based on the changes in concentration of Biochemical Oxygen Demand(BOD), Chemical Oxygen Demand(COD), Total Organic Carbon(TOC), Total Nitrogen(TN), and Total Phosphorus(TP). The average concentration was 0.8 mg/L for BOD, 1.4 mg/L for COD, 0.8 mg/L for TOC, 1.85 mg/L for TN and 0.002 mg/L for TP during non rainfall days. Coniferous forested watersheds showed higher value of TN and TP concentration. Concentrations of BOD and TP in early March (p<0.01) were affected by melt water flow input in spring season. Significant differences (p<0.01) in concentrations were observed in BOD and TOC, indicating seasonal rainfall and vegetation growth impacts on forest stream quality. Concentration of TN and TP showed significant positive correlation, and weak negative correlation was found in the concentration of BOD and TOC. It is expected that result of forest stream water on non rainfall days could be basic information in managing non-point source from forest watersheds.
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이기문 ( Qi Wen Li ),임상준 ( Sang Jun Im ),김동엽 ( Dong Yeob Kim ),이은재 ( Eun Jai Lee ),양현제 ( Hyun Je Yang ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 강우 발생 시 수관 및 임상에 의한 차단 손실량을 분석하여 잣나무림의 수문학적특성을 구명하는데 그 목적이 있다. 수관에 의한 차단 손실량을 측정하기 위하여 1.5m × 1.5m 크기의 인공강우기를 이용한 현장실험을 실시하였으며, 인공강우 중 시간에 따른 수관 내 수분 저류량을 Load cell을 이용하여 측정하였다. 실험 결과, 잣나무의 엽면적 당 최대 저류량과 차단 저류량은 각각 127.0g/m2과 38.7g/m2으로 조사되었고, 차단 저류능은 0.14mm∼0.22mm의 범위로 나타났다. 잣나무의 잎과 가지를 순차적으로 제거한 탈엽 실험의 결과, 차단 저류능은 수관 투영면적이 작아짐에 따라 감소하는 경향을 나타났다. 또한, 차단 저류능은 엽면적과도 강한 정의 상관관계를 가진 것으로 판단되었다. 한편, 임상에 의한 차단 손실량은 0.25m × 0.25m 크기의 소형 인공강우기를 이용한 실내실험을 통하여 측정하였다. 실험 결과, 잣나무 낙엽의 최대 저류량은 2.20g/g이고, 차단 저류량은 1.15g/g으로 나타났다. 최종적으로 실험에 이용된 잣나무 잎의 단위면적당 차단 저류량은 88.1g/m2으로 추정되었다. This study was conducted to analyse hydrological characteristics of Pinus Koraiensis forest on calculating interception of canopy and forest floor. For estimating canopy interception loss, a rainfall simulator that could cover 1.5m × 1.5m area was used and a load cell was used for measuring temporal differency of holden water weight on canopy. As a controlled experiment, sample trees were defoliated 2 times. Without defoliation, the result of interception experiment indicates that maximum water detention and interception loss per leaf surface area were 127.0g/m2 and 38.7g/m2 respectively. Furthermore, interception storage capacity of sample was supposed as 0.14∼0.22mm. In addition, defoliated experiment showed relationship between canopy interception and projected area, however, the correlation of interception with leaf surface area was higher. On the other hand, to estimate forest floor interception loss, a smaller rainfall simulator beyond an area of 0.25m × 0.25m was used indoors and an electronic scale recorded temporal differency of water on litter layer. The maximum water detention and interception loss of litter layer are 2.20g/g and 1.15g/g respectively. The result of interception loss per litter surface area was 88.1g/m2.
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