본 연구는 소규모 충적하천의 안정 하폭 및 수심의 결정기법인 Cheema 등의 방법을 개선한 것으로, 이 기법은 기존 방법과는 달리 제방의 일체 파괴와 전단 파괴에 대한 안정성을 고려할 수 있는 효과적인 방법이다. 실제 하천의 관측 자료에 적용시켜 본 결과, Cheema등의 방법은 50m이하의 하폭을 가진 충적하천일 경우에만 적용이 가능했으나, 본 연구에서 제시한 개선된 방법은 하폭 200m이내의 충적하천의 안정하폭 및 수심을 양호하게 산정하였다. 따라

본 연구는 하천제방의 마루폭, 비탈 경사가 월류에 의한 제방의 붕괴에 미치는 영향을 분석하기 위한 수리모형 실험으로부터 하천수의 제방월류에 따른 붕괴과정을 4단계로 구분하여 제시하였으며, 마루폭 및 비탈경사의 변화에 따른 붕괴폭, 깊이, 붕괴지속시간, 월류량 및 붕괴부 바닥세굴형태 등을 분석하였다. 전반적으로 제방마루폭이 넓고 비탈경사가 완만할수록 첨두월류량을 감소시키며, 붕괴 지속시간이 길어지는 결과를 보였다. 또한 마루폭이 넓거나 비탈경사가 급한경우

The purpose of this study was to propose section designs for the ecological improvement of streams in rural villages in Korea. According to the survey about ecological conditions of rural streams of 10 selected rural villages (sep., 1996), the streams could be classified into three divisions(upstream, inner village, downstream), and the average width of streams was 9m, and the height of banks 3.1m. The slopes of basin were 7.33%, 2.67%, 1.39% at upstream, inner village, downstream respectively. The survey about the residents' usage of stream and the preferred activities(jun., 1997) showed that the streams were most frequently used for the supply of agricultural water use(39%), for the washing(15%) and for the recreation and rippling(10%), etc.. Three standard designs were presented for upstream, inner village, and downstream, and three standard sections were made by each designs. For the upstream division, it was designed to be used for the recreational activities in summer and the major stream bank materials were base rock and existing boulders with least artificiality. As the streams in the residential area were expected to be frequent access and used by the residents, most facilities for the streamside activity such as waterfront, water holes, shallows, walk were concentrated in this part with some artificiality. The downstream was designed for the agricultural activities such as water supply, space for the preparation of work and some break during the work.