Total Maximum Daily Load Analysis and Modeling: Assessment and Advancement

Borah, Deva K.; Padmanabhan, G.; Kumar, Saurav

doi:10.1061/(asce)he.1943-5584.0001853

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Long‐term water quality monitoring is important for assessing nutrient and sediment concentrations entering lakes and reservoirs. Monitoring data allows for constituent load estimations (Malago et al., 2019), total maximum daily load (TMDL) development (Borah et al., 2019), and trend analyses (Shoda et al., 2019), which help analyze impacts of conservation activities and watershed management. In particular, trend analyses of water quality seek to determine whether concentrations or loads of constituents have increased or decreased over time, which can show the effectiveness of management practices or the need for pollutant reduction (e.g., see Haggard, 2010; Scott et al., 2011).…”

Section: Introductionmentioning

confidence: 99%

Water quality concentration trends and loads identify management needs in the Lake Wister watershed

Lasater

Haggard

2022

Agrosystems Geosci & Env

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Trend analyses of water quality seek to determine whether concentrations of constituents have increased or decreased over time, which can show the effectiveness of management practices or the need for pollutant reduction. The Poteau River watershed (PRW) is a transboundary watershed across Arkansas and Oklahoma and, in Arkansas, has been listed as a priority watershed within the Arkansas Nonpoint Source Pollution Plan since 1998. The Poteau River, Black Fork, and Fourche Maline within the PRW flow into Lake Wister, which is an important reservoir for recreation, fishing, and waterfowl hunting for residents and tourists around eastern Oklahoma. The purpose of this study was to analyze long‐term concentration trends and loads on the major tributaries entering Lake Wister using the Weighted Regression on Time, Discharge, and Season (WRTDS). The largest magnitude of loads came from the Poteau River, but flow normalized (FN) P and sediments have decreased over time, which is a positive impact of watershed management and must be maintained. However, FN N on the Poteau River has increased over time and should be the focus of future management on the Poteau River. Although the magnitude of constituent loads from the Fourche Maline is less than from the Poteau River, increasing FN P is a concern and should be prioritized for management in Oklahoma. The relatively undisturbed Black Fork watershed contributes the smallest loads to Lake Wister, and FN concentrations are decreasing or not changing over time, suggesting a low priority for the Black Fork watershed.

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Section: Introductionmentioning

confidence: 99%

Water quality concentration trends and loads identify management needs in the Lake Wister watershed

Lasater

Haggard

2022

Agrosystems Geosci & Env

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“…We do not enumerate a comprehensive list of models useful for determining, allocating and implementation planning of TMDLs in this paper. The TMDL Analysis and Modeling Task Committee of the Environmental and Water Resources Institute of ASCE (ASCE TMDL Analysis and Modeling Task Committee 2017; Borah et al 2019b; ASCE TMDL Analysis and Modeling Task Committee, forthcoming) has compiled a list of models that have been used to determine TMDLs. The ASCE TMDL Analysis and Modeling Task Committee has also covered other vital steps in the TMDL determination process including model calibration, validation (also known as confirmation), uncertainty analysis, and determination of the margin of safety; described data sources used in TMDL modeling including in situ data, geographical information systems (GIS), and remote sensing; and the state-of-the-practice in modeling for TMDL determination, allocation and implementation planning (ASCE TMDL Analysis and Modeling Task Committee 2017, forthcoming).…”

Section: Introductionmentioning

confidence: 99%

“…The ASCE TMDL Analysis and Modeling Task Committee has also covered other vital steps in the TMDL determination process including model calibration, validation (also known as confirmation), uncertainty analysis, and determination of the margin of safety; described data sources used in TMDL modeling including in situ data, geographical information systems (GIS), and remote sensing; and the state-of-the-practice in modeling for TMDL determination, allocation and implementation planning (ASCE TMDL Analysis and Modeling Task Committee 2017, forthcoming). Additionally, the ASCE TMDL Analysis and Modeling Task Committee has also published a collection of 15 research articles on the state-of-the-art in these topics in the Journal of Hydrologic Engineering (Borah et al 2019b).…”

Section: Introductionmentioning

confidence: 99%

Selecting Reliable Models for Total Maximum Daily Load Development: Holistic Protocol

Sridharan

Quinn

Kumar³

et al. 2021

J. Hydrol. Eng.

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Computer models and simpler methods must be used to reliably determine total maximum daily loads (TMDLs) for impaired waters of the US. Models are also useful to develop implementation plans that allocate load reductions to meet water quality standards. During model selection, practical considerations sometimes override the fundamental requirements of parsimony and defensibility. For the first time, a rationale for efficiently selecting reliable models for TMDL determinations is presented in this paper, based on deliberations of the TMDL Analysis and Modeling Task Committee of the Environmental and Water Resources Institute of ASCE. This protocol is based on technical criteria (waterbody, water quality, and data requirements) and management constraints (state plans and priorities, stakeholder and expert engagement, and state authority to manage pollution sources and state allocation priorities). Uncertainties due to changes in economic activity, population, land use, climate, sea level, and policies are also included. To reduce wasteful trial-and-error iterations during model selection, an optimal conceptual modeling framework is identified and subsequently refined in a flowchart based on practical considerations. The proposed protocol holistically defines the state of the science in model selection and is anticipated to soon define the state of the practice for TMDL determination.

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Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

Wang,

Guan,

et al. 2025

Environmental Research

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Total Maximum Daily Load Analysis and Modeling: Assessment and Advancement

Cited by 5 publications

References 16 publications

Water quality concentration trends and loads identify management needs in the Lake Wister watershed

Water quality concentration trends and loads identify management needs in the Lake Wister watershed

Selecting Reliable Models for Total Maximum Daily Load Development: Holistic Protocol

Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

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