• Title, Summary, Keyword: STORM 모형

Search Result 315, Processing Time 0.047 seconds

Inundation Numerical Simulation in Masan Coastal Area (마산 연안의 침수 수치모형 실험)

  • Kim, Cha-Kyum;Lee, Jong-Tae;Jang, Ho-Sik
    • Journal of Korea Water Resources Association
    • /
    • v.43 no.11
    • /
    • pp.985-994
    • /
    • 2010
  • Typoon Maemi landed on the southern coast of Korean Peninsula at 21:00, September 12, 2003 with a central pressure of 950 hPa. A three dimensional (3D) inundation model was established to calculate the storm surge and flooded area due to Typoon Maemi. A field survey of storm surge traces in Masan City was carried out to evaluate the inundation water depth. Hydromet-Rankin Vortex model was used to calculate the atmospheric pressure and the surface wind fields. The inundation area, storm surge and typoon-induced current were calculated using the 3D model. The peak of computed storm surge in Masan Port using the 3D model was 238 cm, and the observed peak was 230 cm. The simulated storm surge and the inundation area showed good agreement with field survey data. The comparison of the 3D and the two dimensional (2D) models of storm surge was carried out, and the 3D model was more accurate. The computed typoon-induced currents in the surface layer of Masan Bay went into the inner bay with 30~60 cm/s, while the currents in the bottom layer flowed out with 20~40 cm/s.

Urban Runoff and Water Quality Models (도시유역에서의 유출 및 수질해석 모형)

  • Lee, Jong-Tae
    • Journal of Korea Water Resources Association
    • /
    • v.31 no.6
    • /
    • pp.709-725
    • /
    • 1998
  • The characteristics of storm and water quality are investigated based on the measuring data of the test river, the Hongje. the water quality of the test river is generally good comparing to other urban rivers in Seoul, because of the interception of sewer flow. But this system makes the river dry up for 3-4 months in winter. On the other hand, in rainy period the storm from the combined sewer system causes rapid increasing pollutants loads. In order to simulate the urban storm and water quality of the trest basin, the models such as SWMM, ILLUDAS, STORM, HEC-1 were applied and the results are compared in its applicability and accuracy aspects. All models discussed here have shown good results and it seems that SUMM is the most effective model in simulating both quantity and quality. Also, regression relations between the water quantity and quality were derived and their applicabilities were discussed. This regression model is a simple effective tool for estimating the pollutant loads in the rainy period, but if the amount of discharge is bigger than measuring range of raw data, the accuracy becomes poor. This model could be supplemented by expanding the range of collecting data and introducing the river characteristics. The HEC-1 would be anther effective model to simulate storm runoff of a river basin including urban area.

  • PDF

Urban Inundation Analysis by Applying with GIS (GIS를 이용한 도시지역 침수해석)

  • Lee, Chang-Hee;Han, Kun-Yeun;Kim, Ji-Sung
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.9 no.2
    • /
    • pp.115-126
    • /
    • 2006
  • The purpose of this study is to develop an urban inundation model using GIS(geographic information system). The model is combining a storm sewer system model and a overland-flow model for the estimation inundation depth in urban area caused by the surcharge of storm sewers. SWMM(storm water management model) was employed to resolve the storm sewer flow and to provide the overflow hydrographs caused by the failure of a drainage system due to the shortage of drainage capacity. The level-pool overland-flow model and DEM based overland-flow model were used to calculate the detail inundation zones and depths due to the surcharge on overland surface. The simulation results can help the decision preventing flood damages by redesigning and enlarging the capacities of storm sewer systems in the inundation-prone areas. The model can also be applied to make the potential inundation area map and establish flood-mitigation measures as a part of the decision support system for flood control authority.

  • PDF

Grid-Based KlneMatic Wave STOrm Funoff Yoncheon Dam watershed. (격자기반의 운동파 강우유출모형 개발(II) - 적용 예(연천댐 유역을 대상으로) -)

  • Kim, Seong-Jun;Chae, Hyo-Seok;Sin, Sa-Cheol
    • Journal of Korea Water Resources Association
    • /
    • v.31 no.3
    • /
    • pp.309-315
    • /
    • 1998
  • The grid-based KIneMatic wave STOrm Runoff Model (KIMSTORM) was applied to YoncheonDam watershed (1,875km2) located in the Imjin river basin of the Korea. Six maps which are DEM(Digital Elevation Model), stream, flow path, soil, land use and Thiessen network, were used for input data. The simulated streamflows resulting from two selected storm events agreed well with the observed flows at the watershed outlet. The results of temporal variations and spatial distributions are presented by using GRASS. Keyword : grid-based, storm-runoff model, GRASS-GIS, Yoncheon dam watershed.

  • PDF

Application of Storm Runoff Model on Small Watershed by Finite Element Method (유한요소법에 의한 소유역 유출모형의 적용)

  • 최진규;손재권
    • Water for future
    • /
    • v.25 no.3
    • /
    • pp.97-104
    • /
    • 1992
  • The distributed hydrologic models are widely applied to estimate the storm-runoff with spatial variability in watershed characteristics and rainfall pattern. This study was aimed to introduce the event-oriented storm runoff model using finite element method, and to try it's applicability on small watershed. Yeonwha watershed was selected and 14 storm events in 1991 were used for the finite element model, and the simulation results were compared with hydrologic quantities.

  • PDF

Development of Storm Sewer Numerical Model for Simulation of Coastal Urban Inundation due to Storm Surge and Rainfall (폭풍해일과 강우에 의한 해안 도시 범람 수치모의를 위한 우수관망 수치모형의 개발)

  • Yoon, Sung Bum;Lee, Jaehwang;Kim, Gun Hyeong;Song, Ji Hoon
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.26 no.5
    • /
    • pp.292-299
    • /
    • 2014
  • Since most of the researches on the coastal inundation due to typhoons have considered only storm surges, an additional inundation due to rainfall has been neglected. In general, typhoons are natural disasters being accompanied by the rainfall. Thus, it is essential to consider the effect of rainfall in the numerical simulation of coastal inundation due to storm surges. Because the rainwater is discharged to the sea through the storm sewer system, it should be included in the numerical simulation of storm surges to obtain reasonable results. In this study an algorithm that can deal with the effects of rainfall and sewer system is developed and combined with a conventional storm surge numerical model. To test the present numerical model various numerical simulations are conducted using the simplified topography for the cases including the inundation due to rainfall, the drainage of rainwater, the backflow of sea water, and the increase of sea water level due to drainage of rainwater. As a result, it is confirmed that the basic performance of the present model is satisfactory for various flow situations.

DEM Based Urban Inundation Analysis Model Linked with SWMM (SWMM을 연계한 DEM기반의 도시침수해석 모형)

  • Lee, Chang-Hee;Han, Kun-Yeun;Choi, Kyu-Hyun
    • Journal of Korea Water Resources Association
    • /
    • v.39 no.5
    • /
    • pp.441-452
    • /
    • 2006
  • Recently the natural damage associated with flood disaster has been dramatically increased. Especially, inundation in the urban area causes serious damage to people and assets because of the concentration of infrastructure and population growth. The purpose of this study is to develop a new urban inundation model combining a storm sewer system model and a 2D overland-flow model for the estimation inundation depth In urban area caused by the surcharge of storm sewers. The movement of water in the studied urban watershed is characterized by two components, namely, the storm sewer flow component and the surcharge-induced inundation component. The model was applied to Goonja and Jangan catchments. Inundated depths were presented to demonstrate model simulation results. The simulation results can help the authority decide preventing flood damages by redesigning and enlarging the capacities of storm sewer systems in the inundation-prone areas. The model can also be applied to make the potential inundation area map and establish flood-mitigation measures as a part of the decision support system for flood control authority.

A Study on the Effects of the Type of Rainfall Distribution upon the Variation of the Critical Storm Duration : Sanbon Watershed (강우분포형태에 따른 임계지속기간의 변화 연구: 산본유역을 중심으로)

  • Yun, Yeo-Jin;Jeong, Sun-U;Jeon, Byeong-Ho
    • Journal of Korea Water Resources Association
    • /
    • v.31 no.4
    • /
    • pp.375-384
    • /
    • 1998
  • In determining design runoff for the design of drainage systems, the concept of critical storm duration is applied. However, rainfall distribution is usually determined without well-defined standards. In this paper, through the application of ILLUDAS model to Sanbon basin, which is a small urbanized watershed, effects of various rainfall distributing types upon the determination of critical storm duration are throughly analyzed. As a result, it is revealed that peak discharge rates as well as critical storm duration are greatly influenced by the applied of rainfall distributions such as uniform, triangular, trapezoid, huff, central type using IDF curve. Keywords : critical storm duration, rainfall distribution, urban runoff, design storm, ILLUDAS.

  • PDF

Development of Urban Inundation Analysis Model Using Dual-Drainage Concept (Dual-Drainage 개념에 의한 도시침수해석모형의 개발)

  • Lee, Chang Hee;Han, Kun Yeun;Noh, Joon Woo
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.26 no.4B
    • /
    • pp.379-387
    • /
    • 2006
  • An urban inundation model coupling an one-dimensional stormwater model, SWMM(Storm Water Management Model), and a two-dimensional inundation model was developed to simulate inundation caused by the surcharge of storm sewers in urban areas. The limitation of this model which can not simulate the interaction between drainage systems and surcharged flow was resolved by developing Dual-Drainage inundation analysis model which was based upon hydraulic flow routing procedures for surface flow and pipe flow. The Dual-Drainage inundation analysis model can simulate the effect of complex storm drainage system. The developed model was applied to Dorim, catchment. The computed inundated depth and area have good agreement with the observed data during the flood events. The developed model can help the decision support system of flood control authority for redesigning and constructing flood prevention structures and making the potential inundation zone, and establishing flood-mitigation measures.

  • PDF

Probability of Performance Failure and Change of Roughness Coefficient According to Accumulation of Debris in Storm Sewer (토사적체에 따른 우수관의 조도계수 변화와 성능불능확률)

  • Kwon, Hyuk-Jae
    • Journal of the Korean Society of Hazard Mitigation
    • /
    • v.10 no.5
    • /
    • pp.135-141
    • /
    • 2010
  • Reliability model which can calculate the probability of performance failure of storm sewer was developed considering change of roughness coefficient in this study. Roughness coefficient should be re-evaluated due to accumulations of debris in sewer pipe. Therefore, roughness coefficient according to depth of debris in circular sewer pipe was determined for the present study. Reliability analysis was performed with the new roughness coefficient. After the analysis, it was found that capacity of storm sewer can be significantly decreased and probability of performance failure of storm sewer can be significantly increased by increasing the depth of debris in storm sewer. In this study, reliability model was applied for the Daegu and Jeonju using new roughness coefficient which was determined according to accumulation of debris in circular storm sewer. It was observed that if the depth of debris is increased, roughness coefficient is increased simultaneously and probability of performance failure of storm sewer is significantly increased.