Estimation of the Hydraulic Width of the Subcatchment Depending on the Degree of Detail of the Drainage System Model

Nowogoński, Ireneusz; Ogiołda, Ewa; Musielak, Marcin

doi:10.2478/ceer-2019-0049

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…In the case of catchments which are non-symmetrical in relation to the pipe, the catchment skewness coefficient also has to be taken into account. Some authors suggest accounting only for the impervious surface area of the partial catchments, rather than the total partial catchment surface area [166].…”

Section: Subcatchment Areamentioning

confidence: 99%

Development of Rainfall-Runoff Models for Sustainable Stormwater Management in Urbanized Catchments

Szeląg

Łagód

Musz-Pomorska

et al. 2022

Water

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Modelling of stormwater networks and the related object (combined sewer overflows, diversion chambers, retention tanks) is a complex task requiring colleting of data with appropriate time and spatial resolution as well as application of adequate models. Often there is a need to find balance between the costs of conducting measurement (period, resolution) and the uncertainty of the model results. This paper presents an overview of simulation tools for sewerage networks modelling, related objects, as well as low-impact development (LID) systems in relation to the hydrodynamic and statistical models. Consecutive stages of data collection, sources of data uncertainty, limitations resulting from the adopted measurement methodology, as well as their influence on the simulation results and possible decision-making using the developed hydrodynamic or statistical model, are discussed. Attention is drawn to the optimization methods enabling reduction in the uncertainty of statistical models. The methods enabling the analysis of model uncertainty, as well as evaluation of its influence on the calculation results pertaining to stormwater hydrographs, retention tank capacity and combined sewers overflows, are also discussed. This is a very important aspect in terms of optimizing construction works in the sewerage network and designing their appropriate dimensions to achieve the assumed hydraulic effects.

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Section: Subcatchment Areamentioning

confidence: 99%

Development of Rainfall-Runoff Models for Sustainable Stormwater Management in Urbanized Catchments

Szeląg

Łagód

Musz-Pomorska

et al. 2022

Water

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“…The width parameter in this study was used to determine the hydrological response of a watershed and compare it with another known model, but sometimes there is no information available to validate and calibrate the models. According to Nowogoński et al (2019), the width value is a calibration parameter with a significant impact on the ability to obtain the correct adjustment of the simulation model to real conditions. When working with scarce information and in the absence of known hydrographs, the width parameter requires a stricter estimation to obtain results that are representative of the drainage area under study.…”

Section: Modeling For Width Parameter Evaluationmentioning

confidence: 99%

A Width Parameter Estimation Through Equivalent Rectangle Methodology for Hydraulic Modeling Applications

Brenes¹,

Vega²,

Hack³

2022

JWMM

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EPA SWMM hydraulic modeling requires the estimation of different parameters allowing the determination of the basin's response upon a given precipitation event. Some physical parameters, such as area or perimeter, are measurable and can be accurately determined; however, other parameter estimation presents greater uncertainty, such as the width parameter. For regular and uniform drainage areas, width parameter estimation is relatively simple; however, when a complete irregular basin analysis is required, width determination presents greater uncertainty, and its representativeness becomes complicated to define. Width determination is idealized with the representation of a rectangle, where, for an equal area, a higher width will result in a faster response of the basin, while a lower width will result in a slower response of the basin. This paper attempts to estimate a representative value of width for a realistic, irregularly shaped basin by defining the equivalent rectangle, which takes into account the area, perimeter, and compactness index of the basin. The compactness index can be used to classify the basin by its shape. The shape of the basin is an indicator of how the precipitation histograms are temporally distributed and how the water flows through the basin, i.e., it defines the response speed of the basin, as the width parameter does in modeling. The width parameter has a high sensitivity in the EPA SWMM modeling results; therefore, an inaccurate estimation of the parameter leads to unrepresentative results. For this reason, this study seeks to find an optimal methodology to reduce modeling uncertainty and achieve more accurate simulations of an irregular watershed's hydrological response.

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Estimation of the Hydraulic Width of the Subcatchment Depending on the Degree of Detail of the Drainage System Model

Cited by 2 publications

References 6 publications

Development of Rainfall-Runoff Models for Sustainable Stormwater Management in Urbanized Catchments

Development of Rainfall-Runoff Models for Sustainable Stormwater Management in Urbanized Catchments

A Width Parameter Estimation Through Equivalent Rectangle Methodology for Hydraulic Modeling Applications

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