Salinity intrusion characteristics analysis using EFDC model in the downstream of Geum River

Jeong, Sangman; Yeon, Kyu-Sung; Hur, Young-Teck; Oh, Kukryul

doi:10.1016/s1001-0742(09)60201-1

Cited by 75 publications

(28 citation statements)

References 5 publications

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“…At present, with the development of advanced computer techniques, two-dimensional and/or threedimensional coastal ocean models have been widely used to better understand and analyze the hydrodynamics, sea water intrusion, and coastal inundation of different estuaries all over the world (Zahed et al, 2008;An et al, 2009;Zhao et al, 2009;Jeong et al, 2010;Yang et al, 2010;Yoon and Shim, 2013;Bhaskaran et al, 2014), with satisfactory results.…”

Section: Discussionmentioning

confidence: 99%

Vulnerability of the Indus River Delta of the North Arabian Sea, Pakistan

2016

Global NEST Journal

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Seawater intrusion has been a serious problem in the Indus River Estuary (IRE) for decades. The literature reviews, hydrological and meteorological observations were analyzed to examine and discuss the causes and consequences of seawater intrusion in the IRE. Both sea water intrusion and coastal erosion are having a devastating environmental and social impact and the whole ecosystem of the Indus Delta is facing serious threat. The Indus deltaic region is not only threatened by continuing activities upstream but also by the neighboring sea in the south, due to the impacts of local weather conditions. Observational results suggest that seawater intrusion reaches 84 km upstream in the IRE during the dry season. Extensive field investigations and a high resolution coastal ocean model are urgently needed for future study.

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Section: Discussionmentioning

confidence: 99%

Vulnerability of the Indus River Delta of the North Arabian Sea, Pakistan

2016

Global NEST Journal

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“…Two kinds of models are typically used: numerical models and analytical models. Presently, numerical models are more popular especially two-dimensional (2-D) and 3-D models (Kärnä et al, 2015;Elias et al, 2012;Zhao et al, 2012;Li et al, 2012;Jeong et al, 2010;Wu and Zhu, 2010;Xue et al, 2009;An et al, 2009, etc. ) because they can provide more spatial and temporal detail.…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical study of the salinity intrusion in the Sebou river estuary (Morocco) – effect of the “Super Blood Moon” (total lunar eclipse) of 2015

Haddout

Igouzal

Maslouhi

2016

Hydrol. Earth Syst. Sci.

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Abstract. The longitudinal variation of salinity and the maximum salinity intrusion length in an alluvial estuary are important environmental concerns for policy makers and managers since they influence water quality, water utilization and agricultural development in estuarine environments and the potential use of water resources in general. The supermoon total lunar eclipse is a rare event. According to NASA, they have only occurred 5 times in the 1900s – in 1910, 1928, 1946, 1964 and 1982. After the 28 September 2015 total lunar eclipse, a Super Blood Moon eclipse will not recur before 8 October 2033. In this paper, for the first time, the impact of the combination of a supermoon and a total lunar eclipse on the salinity intrusion along an estuary is studied. The 28 September 2015 supermoon total lunar eclipse is the focus of this study and the Sebou river estuary (Morocco) is used as an application area. The Sebou estuary is an area with high agricultural potential, is becoming one of the most important industrial zones in Morocco and it is experiencing a salt intrusion problem. Hydrodynamic equations for tidal wave propagation coupled with the Savenije theory and a numerical salinity transport model (HEC-RAS software "Hydrologic Engineering Center River Analysis System") are applied to study the impact of the supermoon total lunar eclipse on the salinity intrusion. Intensive salinity measurements during this extreme event were recorded along the Sebou estuary. Measurements showed a modification of the shape of axial salinity profiles and a notable water elevation rise, compared with normal situations. The two optimization parameters (Van der Burgh's and dispersion coefficients) of the analytical model are estimated based on the Levenberg–Marquardt's algorithm (i.e., solving nonlinear least-squares problems). The salinity transport model was calibrated and validated using field data. The results show that the two models described very well the salt intrusion during the supermoon total lunar eclipse day. A good fit between computed salinity and measurements is obtained, as verified by statistical performance tests. These two models can give a rapid assessment of salinity distribution and consequently help to ensure the safety of the water supply, even during such infrequent astronomical phenomenon.

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“…This study mainly focuses on the EFDC simulations and result analysis from SDT to GOUS, the upstream portion of BRRS, under different large releases from Smith Dam. The EFDC model is a general-purpose modeling package that can be configured to simulate 1D, 2D and 3D flow, transport, and biogeochemical processes in various surface water systems including rivers, lakes, estuaries, reservoirs, wetlands, and coastal regions [45][46][47][48][49][50]. The Mellor-Yamada level 2.5 turbulence closure scheme [51] is used in EFDC to calculate vertical turbulent diffusion coefficients of momentum and mass, which are linked to vertical turbulent intensity, turbulent length scale, and the Richardson number.…”

Section: Model Application Boundary Conditions and Calibration Resultsmentioning

confidence: 99%

Sensitivity Analysis of Flow and Temperature Distributions of Density Currents in a River-Reservoir System under Upstream Releases with Different Durations

Chen

Fang

2015

Water

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Abstract:A calibrated three-dimensional Environmental Fluid Dynamics Code model was applied to simulate unsteady flow patterns and temperature distributions in the Bankhead river-reservoir system in Alabama, USA. A series of sensitivity model runs were performed under daily repeated large releases (DRLRs) with different durations (2, 4 and 6 h) from Smith Dam Tailrace (SDT) when other model input variables were kept unchanged. The density currents in the river-reservoir system form at different reaches, are destroyed at upstream locations due to the flow momentum of the releases, and form again due to solar heating. DRLRs (140 m 3 /s) with longer durations push the bottom cold water further downstream and maintain a cooler bottom water temperature. For the 6-h DRLR, the momentum effect definitely reaches Cordova (~43.7 km from SDT). Positive bottom velocity (density currents moving downstream) is achieved 48.4%, 69.0% and 91.1% of the time with an average velocity of 0.017, 0.042 and 0.053 m/s at Cordova for the 2-h, 4-h and 6-h DRLR, respectively. Results show that DRLRs lasting for at least 4 h maintain lower water temperatures at Cordova. When the 4-h and 6-h DRLRs repeat for more than 6 and 10 days, respectively, bottom temperatures at Cordova become lower than those for the constant small release (2.83 m 3 /s). These large releases overwhelm the mixing effects due to inflow momentum and maintain temperature stratification at Cordova.

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Salinity intrusion characteristics analysis using EFDC model in the downstream of Geum River

Cited by 75 publications

References 5 publications

Vulnerability of the Indus River Delta of the North Arabian Sea, Pakistan

Vulnerability of the Indus River Delta of the North Arabian Sea, Pakistan

Analytical and numerical study of the salinity intrusion in the Sebou river estuary (Morocco) – effect of the “Super Blood Moon” (total lunar eclipse) of 2015

Sensitivity Analysis of Flow and Temperature Distributions of Density Currents in a River-Reservoir System under Upstream Releases with Different Durations

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