백두대간 태백산지역의 백천계곡에 대해 삼림군집구조 분석을 실시하기 위해 50개 조사구를 설치하고, 식생조사를 실시하였다. TWINSPAN 기법을 활용하여 군락을 분리한 결과 신갈나무-소나무군락(I), 소나무-신갈나무군락(II), 당단풍-신갈나무군락(III), 박달나무-당단풍군락(IV), 그리고 층층나무군락(V)의 5개 군락으로 최종 분리되었다. 각 군락은 층위별 상대우점치 분석을 통하여 식생구조를 밝혔다. 연륜분석결과 백천계곡의 임령은 소나무림이 50~75년. 신갈나무림이 40년 내외로 밝혀졌다. 단위면적당(100m2) 평균출현종수는 11.1±2.2종, 평균출현개체수는 74.6±28.1주였다. 흉고직경급별 분석을 포함한 이상의 결과로 식생천이를 예측한 결과 백천계곡은 소나무에서 신갈나무를 거쳐 층층나무, 박달나무 등의 활엽수로 전개될 것으로 판단된다

Multifunctional weirs constructed through the Four Major Rivers Restoration Project are operated as management water levels. The purpose of this study was to evaluate the effect of water level in the main stem on the tributary water level according to multifunctional weir operation, because the operation of multifunctional weirs for water level management influences the drainage of tributaries. In this study, water level pressure gauges were installed and spatial and temporal water quality was observed. The LOcally Weighted Scatterplot Smoothing (LOWESS) technique was applied to the Nakdong River and the Baekcheon Junction, both upstream of the Gangjeong-Goryeong weir, in order to analyze water quality trends. When considering the overall analysis and observations, it was found that the water quality forecasting point located at the Baekcheon estuary point should be transferred to the Dosung Bridge, which is located upstream of the Sunwon Bridge.