Numerical simulation of wetland hydrodynamics

Somes, Nick L; Bishop, Warwick; Wong, Tony Hoong Fatt

doi:10.1016/s0160-4120(99)00058-6

Cited by 37 publications

(19 citation statements)

References 3 publications

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“…Factors that in¯uence the hydraulic performance in ponds are mainly related to shape, including baes (Mangelson & Watters, 1972;Thackston et al, 1987); topography (Somes, Bishop, & Wong, 1997;Knight & Iverson, 1990); vegetation (Moshiri, 1993;Somes et al, 1997;Kadlec, 1990);¯ow (Mangelson & Watters, 1972;Adamsson, Persson, & Lyngfelt, 1999); location of inand outlets (Mangelson & Watters, 1972, Ta & Brignal, 1998; wind (Shaw, Watt, Marsalek, & Anderson, 1997;Kadlec & Knight, 1996); and temperature (Marecos de Monte & Mara, 1987;Torres, Soler, Saez, & Ortuno, 1997). Other research eorts have focussed on de®ning hydraulic eciency (Persson, Somes, & Wong, 1999).…”

Section: Research On Pond Hydraulicsmentioning

confidence: 99%

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The hydraulic performance of ponds of various layouts

2000

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This study analyses how the hydraulic performance diers between 13 ponds with hypothetically dierent layouts. The paper also includes a discussion of short-circuiting, hydraulic eciency and suitable parameters for measuring hydraulic performance. The ponds were studied by using a 2-D vertically integrated numerical model. Tracer studies were simulated and then evaluated and compared. The results con®rm that length-to-width ratio, location of in-and outlets, and subsurface berm have a large impact on pond hydraulic performance. There is also an indication that an island placed in front of the inlet improves the hydraulic performance, and that a curved pond or an island placed near the side does not decrease the performance. Ó

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Section: Research On Pond Hydraulicsmentioning

confidence: 99%

“…But numerical simulations have also been used to test possible hydraulic improvements by adding design elements such as baes or changing vegetation and outlet con®guration. Some examples are given in Wood, Green®eld, Howes, Johns, and Keller (1995), Somes et al (1997) and Ta and Brignal (1998).…”

Section: Model Setup and Simulationsmentioning

confidence: 99%

The hydraulic performance of ponds of various layouts

2000

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“…Current hydrodynamic modeling of wetlands and shallow reservoirs is normally taken into account using 2D depth averaged models based on either wastewater treatment or overseas experience [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Envisat/ASAR Images for the Calibration of Wind Drag Action in the Doñana Wetlands 2D Hydrodynamic Model

et al. 2013

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Doñana National Park wetlands are located in southwest Spain, on the right bank of the Guadalquivir River, near the Atlantic Ocean coast. The wetlands dry out completely every summer and progressively flood again throughout the fall and winter seasons. Given the flatness of Doñana's topography, the wind drag action can induce the flooding or emergence of extensive areas, detectable in remote sensing images. Envisat/ASAR scenes acquired before and during strong and persistent wind episodes enabled the spatial delineation of the wind-induced water displacement. A two-dimensional hydrodynamic model of Doñana wetlands was built in 2006 with the aim to predict the effect of proposed hydrologic restoration actions within Doñana's basin. In this work, on-site wind records and concurrent ASAR scenes are used for the calibration of the wind-drag modeling by assessing different formulations. Results show a good adjustment between the modeled and observed wind drag effect. Displacements of up to 2 km in the wind direction are satisfactorily reproduced by the hydrodynamic model, while including an atmospheric stability parameter led to no significant improvement of the results. Such evidence will contribute to a more accurate simulation of hypothetic or design scenarios, when no information is available for the atmospheric stability assessment.

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“…Simulation on the Monash University Research Wetland was conducted by Somes et al (1999) using MIKE 21, a two-dimensional model developed by Somes et al at the Danish Hydraulic Institute. Hydraulic roughness, water depth and vegetation contents were found to be the factors that controlled flow within the wetland.…”

Section: Introductionmentioning

confidence: 99%

Numerical and multivariate stochastic approaches to characterize flow in a constructed wetland basin

Wei

Plappally

Soboyejo

et al. 2011

Stoch Environ Res Risk Assess

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Reduction in specific and viscous dissipation rate in surface waters by flow control and contaminant removal are the goals of constructed wetlands. A twodimensional simulation study on surface flow through a constructed wetland in Guilin, China is performed. The flow through the wetland is modeled and dynamically simulated by distinct case studies by varying both inlet width and inflow rate. Nonlinear increase in peak dynamic pressure and specific dissipation rates as a function of increasing inflow rate is reported for the different cases studied. The results of the numerical models confirm an increase in viscous dissipation, shear stress and dynamic pressure within the wetland with increase in inflow rate. These modeling results are used as inputs for performing a statistical data analysis. Further, a multivariate stochastic statistical framework has been proposed for the prediction of dissipation as a function of variables including inflow rate, inlet geometry and wall shear stress. Multivariate and variance analysis is performed to validate the appropriateness of the theoretical models proposed. Results provide simplified meaningful suggestions to constructed wetland design and related applications.

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Numerical simulation of wetland hydrodynamics

Cited by 37 publications

References 3 publications

The hydraulic performance of ponds of various layouts

The hydraulic performance of ponds of various layouts

Envisat/ASAR Images for the Calibration of Wind Drag Action in the Doñana Wetlands 2D Hydrodynamic Model

Numerical and multivariate stochastic approaches to characterize flow in a constructed wetland basin

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