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도시 소유역 내 내수침수 위험도 평가 : 강우 시간분포 및 이중배수체계 모형을 중심으로
대한상하수도학회 대한상하수도학회 2021 상하수도학회지 Vol.35 No.6
In this study, dual drainage system based runoff model was established for W-drainage area in G-si, and considering the various rainfall characteristics determined using Huff and Mononobe methods, the degree of flooding in the target area was analyzed and the risk was compared and analyzed through the risk matrix method. As a result, the Monobe method compared to the Huff method was analyzed to be suitable analysis for flooding of recent heavy rain, and the validity of the dynamic risk assessment considering the weight of the occurrence probability as the return period was verified through the risk matrix-based analysis. However, since the definition and estimating criteria of the flood risk matrix proposed in this study are based on the return period for extreme rainfall and the depth of flooding according to the results of applying the dual drainage model, there is a limitation in that it is difficult to consider the main factors which are direct impact on inland flooding such as city maintenance and life protection functions. In the future, if various factors affecting inland flood damage are reflected in addition to the amount of flood damage, the flood risk matrix concept proposed in this study can be used as basic information for preparation and prevention of inland flooding, as well as it is judged that it can be considered as a major evaluation item in the selection of the priority management area for sewage maintenance for countermeasures against inland flooding.
2 차원 수리 수질모델(CE - QUAL - W2)을 이용한 소양호 수온 성층현상과 홍수기 밀도류 이동 현상의 모델링
김윤희,김범철,서동일,최광순 대한상하수도학회 2001 상하수도학회지 Vol.15 No.1
The temporal and spatial distribution of water temperature was surveyed and simulated in a deep warm monomocitic Soyang Reservoir. The great depth (maxium depth of 100m) and wind-sheltered dendritic shape caused strong summer stratification. Turbid storm runoff during the summer monsoon formed a metalimnion of 20-40m thickness which was distinct from the clearer epilimnion and hypolimnion. The temperature distribution and the movement of density current were simulated by using the 2-dimensional hydrologic model CE-QUAL-W2. Model was calibrated with 1996 data and verified with data from 1995-1999 by applying the same set of parameters and constants as in calibration. The model could simulated temperature profiles with excellent agreement. Simulation results of movement of the intemediate density current also satisfactory. It can be concluded that the CE-QUAL-W2 model is useful in the prediction of the temperature distribution and movement of density current in reservoirs, which impiles merits for further employment in water quality simulation.
박용균,정성균,권혁재 대한상하수도학회 2015 상하수도학회지 Vol.29 No.6
In this study, determination methods of monitoring location in water distribution system were suggested and applied to real test bed. Small block of Gwangtan water distribution system is consisted of 582 pipes, 564 junctions, 1 reservoir, and 1 pump station. Small block of Ho Chi Minh water distribution system is consisted of 162 pipes, 148 junctions, and 1 reservoir. Two small block water distribution systems were analyzed by pressure contribution analysis method to determine the optimum monitoring locations. The pressure change was estimated at each junctions by the additional demand at a junction. From the results, the optimum monitoring location can be determined by rank of pressure contribution index at each junctions due to demand change at a junction.
비소와 철 동시제거를 위한 Fe-GAC와 GAC로 충진된 컬럼
이용수,도시현,홍성호 대한상하수도학회 2016 상하수도학회지 Vol.30 No.1
First of all, Fe or/and Mn immobilized granular activated carbons (Fe-GAC, Mn-GAC, (Fe, Mn)-GAC) were synthesized and tested to remove arsenate (As(V)). The results in batch test indicated that Fe-GAC removed As(V) effectively, even though the surface area of Fe-GAC was reduced largely. Moreover, adsorption isotherm test indicated that the experimental data fit well with Langmuir model and the maximum adsorption capacity (qmax) of Fe-GAC for As(V) was 3.49 mg g-1, which was higher than GAC (2.24 mg g-1). In column test, the simulated water, which consisted of As(V), Fe(III), Mn(II) and Ca(II) in tap water, was used. Fe-GAC column with 1 hr of pre-washing time treated As(V) effectively while GAC column removed Fe(III) better than Fe-GAC column. Moreover, the increasing pre-washing time from 1 to 9 hour in Fe-GAC column enhanced Fe(III) removal with little negative impact of As(V) removal. Mostly, the column filled with Fe-GAC and GAC (i.e. the mass ratio of Fe-GAC:GAC = 2:8) showed the higher treatability of both As(V) and Fe(III), even it operated with 1 hr pre-washing time.