금강수계 백곡천 상류에 서식하는 미호종개(국가 천연 기념물)를 대상으로 형광물질 주입에 의한 다중표지-재포 획법(졸리-시바모델적용)으로 개체군 크기를 추정하였다. 총 어류조사지점은 335개였고, 그 중 미호종개가 출현 지 점은 217개 였다. 본 연구에서 추정한 미호종개 평균 개 체군 크기는 6,143개체였다. 이는 2009년 환경부에서 수행한 미호종개 개체군 규모와 비교 했을때보다 41% 감 소된 것이다. 백곡천에서 본 종의 감소는 미소서식지 훼 손, 퇴적물, 서식환경의 악화 등의 영향으로 판단된다. 따 라서 백곡천 본 종의 개체군 회복 미소서식지 보호를 위 해 서식지복원 프로그램이 요구된다.

The objective of study was to analyze seasonal and inter-annual patterns of water chemistry of Miho Stream watershed during 2004 - 2007 along with some influences of tributaries and summer monsoon on the stream water quality. For the study, eight physico-chemical parameters such as nitrogen, phosphorus, BOD, COD and chlorophyll-a (CHL) etc. were analyzed in relation to spatial and temporal variability of seven sampling sites of the mainstream and some tributaries in the watershed. In the upstream reach, Mean of BOD, COD and TP averaged 3.2 mg/L, 6.5 mg/L and 186 μg/L, respectively, indicating an eutrophic conditions as a III-rank in the stream water quality criteria from the Ministry of Environment, Korea(MEK). The eutrophic water was due to a combined effect of Chiljang tributary with high nutrients (TP=844 μg/L, TN=8.087 mg/L) and the point sources from some wastewater treatment plants. In the meantime, BOD, TN, and TP in the downstream reach were about > 1.2-1.5 folds than the values of the midstream reaches. This was mainly attributed to effluents of nutrient rich-water (mean TN: 11.980 mg/L) from two tributaries of Musim Stream and Suknam Stream, which is directly influenced by nearby wastewater disposal plants. Seasonal analysis of water chemistry showed that summer monsoon rainfall was one of the important factors influencing the water quality, and water quality had a large spatial heterogeneity during the rainfall period. In the premonsoon, BOD in the downstream averaged 6.0±2.47 mg/L, which was 1.4-fold greater than the mean of upstream reach. Mean of CHL-a as an indicator of primary productivity in the water body, was > 2.2 - 2.9 fold in the downstream than in the upstream, and this was a result of the high phosphorus loading from the watershed. Overall, our data suggest that some nutrient controls in point-source tributary streams are required for efficient water quality management of Miho Stream.

This study was analyzed and investigated to evaluate ecological distribution of medicinal plants in Miho Stream of Korea. Totality 463 taxa of vascular plants were appeared in lower part of Miho Stream. Medicinal plants were distributed 253 taxa, which were 54.6% of the total vascular plants appeared. Medicinal plants of official drug compendium(Korean pharmacopoeia) were 85 taxa. Medicinal plants were distributed most of the forest area, and followed field surrounding, stream surrounding and paddy surrounding respectively. The distribution of life form hemicryptophyte was the most frequent. Plant community of appearing area of medicinal plants was classified into Salix koreensis, Phragmites japonica, Echinochloa crusgalli, Artemisia selengensis, Miscanthus sacchariflorus, Setaria faberii, Panicum dichotomiflorum, Bidens frondosa, Humulus japonicus, Monochoria vaginalis var. plantaginea, Eleocharis kuroguwai, Erigeron acris, Pinus densiflora, Pinus rigida, Quercus acutissima, Quercus serrata, Robinia pseudoacacia and Castanea crenata community. Medicinal plants in plant communities that occur frequently were Humulus japonicus, Corylus heterophylla and Liriope spicata.

본 연구에서는 금강홍수통제소의 홍수조절 주요지점인 금강수계의 미호천 유역(석화 수위관측소)을 대상유역으로 선정하였다. GIS와 결합된 홍수유출모형인 WMS를 이용하여 수문학적 지형특성인자를 추출하였으며, 유출해석은 WMS에 내재된 HEC-1을 이용하였다. 유효강우량의 산정을 위해 SCS의 CN 값을 사용하였으며, 합성단위도법으로는 Clark, Snyder 및 SCS 무차원 단위도법을 사용하였다. 본 연구에서는 실측 수문곡선과의 검증을 통해 미계측 유역에