SWMM Modeling of a Rural Watershed in the Lower Coastal Plains of the United States

Moynihan, Kyle; Vasconcelos, José G.

doi:10.14796/jwmm.c372

Cited by 13 publications

(5 citation statements)

References 12 publications

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“…However, ref. [10,45] also practice SWMM for hydrological modeling of rural watersheds and found it a suitable package for implementation over other rural watersheds. The model works on different blocks among which runoff block generates surface runoff governed by the equation of continuity.…”

Section: Models Descriptionmentioning

confidence: 99%

“…The accurate discharge measurement for such catchment remains a challenge due to the in-depth calculation of physical parameters. However, improvements and advancement in studies, on water balance and natural environment change, have propelled hydrological-as well as hydraulic-studies in past decades [10]. Different strategies have been developed by researchers [11][12][13][14][15] to integrate the effects of physical and human-induced factors on runoff for storm events.…”

Section: Introductionmentioning

confidence: 99%

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Integrated Hazard Modeling for Simulating Torrential Stream Response to Flash Flood Events

Munir

Ahmad

Hafeez

2019

IJGI

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This study aims to monitor the flash flood response of Vidor/Wadore hill torrent in Pakistan by the integration of Personal Computer Storm Water Management Model PCSWMM (hydrologic) and HEC-RAS 5.x (hydraulic) models. The method leverages remote sensing and GIS derive estimates of measured and inferred parameters of Vidor rural catchment to quantify the flash flood events of the last four years: 2014–2017. The calibration of the PCSWMM is performed using the sensitivity-based radio tuning calibration (SRTC) tool. The Nash–Sutcliffe efficiency (NSE), coefficient of determination (R2), and relative error (RE) values were found between 0.75–0.97, 0.94–0.98, and −0.22–−0.09 respectively. The statistical indicators prove the accuracy of PCSWMM for rural catchments. The runoff response of Vidor torrent is also analyzed for 0.5/12.7, 1.5/38.1, and 2.0/50.8-inch/mm rainfall hyetographs. The generated hydrographs are used to simulate 2D-module in HEC-RAS 5.x for floodplain demarcation in the piedmont area. The accuracy of the flood extent is analyzed using spatial overlay analogy in the ArcGIS environment by comparing simulated and historically available flood extents. The simulated flood extent shows 76% accuracy with historic flood extent. The impact of flash flood events shows wheat, maize, and fruit orchards are the most effected agriculture in piedmont area. The results revealed that the integration of hydrological, hydraulic, and geospatial modeling approaches can be used to model a full picture of catchment response during flash flood events.

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Section: Models Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated Hazard Modeling for Simulating Torrential Stream Response to Flash Flood Events

Munir

Ahmad

Hafeez

2019

IJGI

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“…SWMM is a dynamic hydrologic-hydraulic water quality simulation model that is primarily used for urban areas; however, it also has applications for drainage systems in non-urban areas [12,13]. The model conceptualizes a drainage system as a series of water and material flows between several environmental compartments.…”

Section: Swmmmentioning

confidence: 99%

Using the HSPF and SWMM Models in a High Pervious Watershed and Estimating Their Parameter Sensitivity

Tsai

Chen

Fan

et al. 2017

Water

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Models are necessary tools for watershed management. However, applying watershed models is time consuming and requires technical knowledge, including model selection and validation. The objective of this study is to assess two commonly used watershed models and their parameter sensitivity to reduce model loadings and to gain a better understanding of the model performances. The Hydrological Simulation Program-Fortran (HSPF) model and Storm Water Management Model (SWMM) were applied to a mostly forested Taiwanese reservoir watershed with pollution from tea plantations. Statistical analysis showed that both models are suitable for the studied watershed, but the performances of the flow and water quality simulations are different. The mean flow simulated by SWMM was lower than the experimental observations. The HSPF model performed better, possibly because the soil in the study area is highly permeable and the HSPF model has more precise soil layer calculations. SWMM may underestimate the total phosphorous (TP) and suspended solid (SS) loads following small storm events in highly permeable watersheds. The Latin Hypercube-One factor At a Time (LH-OAT) method was used to determine the parameter sensitivity of the HSPF model and SWMM. In both of the models, the parameters related to infiltration and soil characteristics strongly affected the flow simulation, except when using the Horton infiltration method in the SWMM. Manning's roughness coefficient for pervious areas was more sensitive in SWMM than in the HSPF model because SWMM has fewer parameters.

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“…The SWMM is able to assess runoff, and several studies have used this model for watershed runoff quantity and quality simulations. For example, Temprano et al [6] applied SWMM to a mixed land use watershed in Spain, Modugno et al [7] used SWMM for urban areas in southern Italy, Pretorius et al [8] applied SWMM to an undeveloped watershed in the US, Moynihan and Vasconcelos [9] also applied SWMM to a nonurban watershed in the lower coastal plains of the US, and Talbot et al [10] used SWMM to optimize a management plan for an agricultural land-based watershed in Ontario, Canada. In Taiwan, the SWMM has been used as a reservoir management plan tool [11,12].…”

Section: Introductionmentioning

confidence: 99%

Applying a Watershed and Reservoir Model in an Off-Site Reservoir to Establish an Effective Watershed Management Plan

Chen

Lin

2019

Processes

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Off-site reservoirs use water from other watersheds to supplement their water quantity. Water quality is usually better in off-site reservoirs than in onsite reservoirs, because in comparison to onsite reservoirs, watershed areas are smaller and fewer pollutants are collected; moreover, cleaner water is introduced. However, in Taiwan, the water quality of some off-site reservoirs can gradually worsen, and this factor needs to be addressed. In this study, the Liyutan reservoir in central Taiwan was used as an example to demonstrate the process of evaluating pollution in an off-site reservoir. Pollution loads from point sources (PSs) and nonpoint sources (NPSs) were carefully estimated. Domestic sewage and tourist wastewater were considered the major PS loads in this study. The NPS load evaluation was dependent on the results of a verified watershed model, the stormwater management model (SWMM). The observed data in 2015 and 2016 and supplementary total phosphorous (TP) samplings in upstream rivers in 2018 were used to validate the model results. Model calibration and verification were implemented during dry weather and wet weather to ensure the accuracy of the PS and NPS simulations. The results of this study showed that the average total phosphorous (TP) load generated from within the watershed was 9013 kg/y, and that the TP load from outside the watershed was 4545 kg/y. The percentages of TP loads from NPSs and PSs in the watershed were 83% and 17%, respectively. Finally, we used a verified Vollenweider model to convert the TP loads to the TP concentration in the reservoir. The pollution reduction measures and the associated predicted water quality values were assessed using the verified models.

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SWMM Modeling of a Rural Watershed in the Lower Coastal Plains of the United States

Cited by 13 publications

References 12 publications

Integrated Hazard Modeling for Simulating Torrential Stream Response to Flash Flood Events

Integrated Hazard Modeling for Simulating Torrential Stream Response to Flash Flood Events

Using the HSPF and SWMM Models in a High Pervious Watershed and Estimating Their Parameter Sensitivity

Applying a Watershed and Reservoir Model in an Off-Site Reservoir to Establish an Effective Watershed Management Plan

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