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이상구(Lee Sang-Gu),유상호(Yu Sang-Ho),오상용(Oh Sang-Yong),민일규(Min Il-Kyu),민병형(Min Beung-Hyeung) 동아대학교 해양자원연구소 2002 동아대학교 해양자원연구소 연구논문집 Vol.14 No.-
To stand river capital planning, flow situation like low-flow in small rivers used to be calculated as the ratio of area by flow situation in other large rivers. Which is because the small rivers don"t have a survey about the small watershed area water-level and discharge. Therefore, this study has examined the low-flow estimation computerizing the dearth water discharge amount in small rivers.<BR> The low-flow statistics which is calculated by independent variables of the watershed area(A), the average basin slope(S), the void ratio(V), the volume of pores(V<SUB>f</SUB>), the mountain ratio(M) and the year average amount of rainfall(R) is as follows.<BR> Q = 0.00245 A<SUP>0.516</SUP> S<SUP>-0.024</SUP> V<SUB>f</SUB><SUP>0.014</SUP> M<SUP>-0.061</SUP> R<SUP>0.079</SUP>
조성만(Cho Seong-Man),유상호(Yu Sang-Ho),박병선(Park Byung-Sun),민일규(Min Il-Kyu),민병형(Min Byung-Hyung) 동아대학교 해양자원연구소 2002 동아대학교 해양자원연구소 연구논문집 Vol.14 No.-
As the roughness coefficient by existing Manning table is used by technician"s experience and judgement, it isn"t always correct.<BR> This study as a try to make quantitative roughness coefficient is to suggest a new application mode computerizing roughness coefficient by surveying the velocity and hydraulic condition of small rivers.<BR> The bound of roughness coefficient was 0.027~0.180 and its values distribute uniformly. This means that the roughness coefficient adapt value by Manning table cannot fill up the transformed value when the small rivers are low.<BR> The roughness coefficient computation mode in this study with hydraulic radius(R), channel slope(I), average grain diameter(D) as subject factors presents as follows.<BR> n´ = 5.97 R<SUP>0.671</SUP> I<SUP>0.452</SUP> D<SUP>0.059</SUP>
海雲臺 海水浴場에 있어서의 養濱工法에 관한 實驗的 硏究
閔丙亨(Byung-Hyung Min),玉致律(Chi-Yul Ok),劉相昊(Sang-Ho Yu) 한국해양공학회 1987 韓國海洋工學會誌 Vol.1 No.1
A beach nourishment method can be used as one of the beach erosion protection methods which may keep coastal environments whithout constructing coastal structures on the HAE UN DAE beach.<br/> The beach nourishmens is affected by a natural condition and artificial condition; a natural condition includes conditions of bottom slope, diameter of bottom materials and waves, and artificial conditions include deposit position, method, diameter and quantity of the nourishing sand.<br/> It has been accomplished to obtain the deposit position and the best diameter of the nourishing sand from a two-dimensional hydraulic model test, which simulates the erosional HAE UN DAE beach.<br/> In this study, the protection of the beach erosion can be maximized when the nourishing sand of 3.3㎜ in diameter, which is about 5.5 times of the bottom materials in diameter, is deposited layerly in front of the breaker zone which has a water depth of 4.6m.