A random utility model for total maximum daily loads: Estimating the benefits of watershed-based ambient water quality improvements

2002 ◽  
Vol 38 (11) ◽  
pp. 36-1-36-11 ◽  
Author(s):  
Daniel J. Phaneuf
Keyword(s):  
Water Quality ◽  
Random Utility Model ◽  
Random Utility ◽  
Ambient Water ◽  
Utility Model ◽  
Quality Improvements ◽  
Total Maximum Daily Loads ◽  
Maximum Daily Loads ◽  
Total Maximum

Spatial and temporal pollutant budget analyses toward the total maximum daily loads management for the Yeongsan watershed in Korea

2007 ◽  
Vol 55 (1-2) ◽  
pp. 367-374 ◽  
Author(s):  
S.J. Ki ◽  
Y.G. Lee ◽  
S.-W. Kim ◽  
Y.-J. Lee ◽  
J.H. Kim
Keyword(s):  
Water Quality ◽  
Oxygen Demand ◽  
Volumetric Flow Rate ◽  
Control Approach ◽  
Total Maximum Daily Loads ◽  
Wide Range ◽  
Management Plans ◽  
Maximum Daily Loads ◽  
The City ◽  
Total Maximum

This paper delivers two issues: water quality in the Yeongsan (YS) watershed which is one of the major watersheds in Korea and new watershed management plans with respect to the total maximum daily loads (TMDL) management. Field studies were conducted to estimate the pollutant loads according to the spatial and temporal distribution based on the biochemical oxygen demand (BOD) concentration and the volumetric flow rate (VFR) data from YS watershed. The results of both spatial and temporal analyses show the main pollutant source was originated from the city of Gwangju and the pollutant load from the city to YS watershed was the most out of five cities during this study period. Concerning YS reservoir located downstream of YS watershed, it also shows the worst water quality in the entire watershed during the study period. These results collectively demonstrate that the city of Gwangju is a main region which generates numerous point and non-point pollutant sources and eventually the pollutants are accumulated in YS reservoir. Based on the results, we suggest two different management plans for YS watershed. One is the flow-control approach that is to increase the amount of dam discharge in order to guarantee the river management flow for the midstream region. The other is the mass-control approach that is to dredge the contaminated sediments in YS reservoir for removing pollutants chronically accumulated in the sediment. Simulations for the former and the latter provide the pollution mitigation rate in the watershed up to 6 and 8% for BOD5, respectively. The methodology proposed here for TMDL management can be applied to a wide range of watersheds in Korea.

Determination of target water quality indicators and values on total maximum daily loads management system in Korea

2009 ◽  
Vol 6 (1-3) ◽  
pp. 12-17 ◽  
Author(s):  
Bae Kyung Park ◽  
Jae Hong Park ◽  
Seung Young Oh ◽  
Dong Soo Kong ◽  
Doug Hee Rhew ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Indicators ◽  
Management System ◽  
Water Quality Indicators ◽  
Total Maximum Daily Loads ◽  
Maximum Daily Loads ◽  
Total Maximum

scholarly journals Deterministic and probabilistic approaches to the development of pH total maximum daily loads: a comparative analysis

2007 ◽  
Vol 9 (3) ◽  
pp. 203-213
Author(s):  
A. Elshorbagy ◽  
K. Parasuraman ◽  
G. Putz ◽  
L. Ormsbee
Keyword(s):  
Water Quality ◽  
Probabilistic Approach ◽  
Quality Standards ◽  
Deterministic Approach ◽  
Water Quality Standards ◽  
Total Maximum Daily Loads ◽  
Creek Watershed ◽  
Margin Of Safety ◽  
Maximum Daily Loads ◽  
Total Maximum

The most commonly used deterministic approach to the development of total maximum daily loads (TMDLs) fails to explicitly address issues related to a margin of safety and inherent variability of streamflows in the process of TMDL development. In this paper, the deterministic approach to pH TMDL development for Beech Creek watershed, Muhlenberg County, Kentucky, proposed by Ormsbee, Elshorbagy and Zechman is discussed. The shortcomings and the limitations of the assumptions associated with the deterministic approach are highlighted. An alternative probabilistic approach, to cope with the percentile-based water quality standards based on Monte Carlo simulation, is presented and compared to the deterministic approach. The proposed probabilistic approach provides a deeper insight into the issue of uncertainty and emphasizes the importance of handling the water quality standards and TMDLs in terms of magnitude and frequency rather than a single-valued approach. Expected exceedances and the confidence of compliance with percentile-based standards are estimated. Accordingly, an objective method of estimating the margin of safety for pH TMDLs is proposed.

Characterizing Carbonaceous Biochemical Oxygen Demand Load Reductions from Pulp and Paper Mills for Activities Related to Total Maximum Daily Loads

TAPPI Journal ◽  
2010 ◽  
Vol 9 (1) ◽  
pp. 20-26
Author(s):  
James E. Palumbo ◽  
Linfield C. Brown
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Water Quality Assessment ◽  
Pulp And Paper ◽  
Rate Coefficients ◽  
Total Maximum Daily Loads ◽  
Maximum Daily Loads ◽  
Total Maximum

Characterizing the effect of organic materials on receiving water-dissolved oxygen levels is important in water quality assessment studies involving pulp and paper facilities. Long-term biochemical oxygen demand (LTBODBODBOD) tests of pulp and paper effluents can be used to estimate many important characteristics such as ultimate BODBODBOD, rate coefficients, ultimate to 5-day BODBODBOD ratios (f-ratios), and reactivity. However, many of these characteristics are difficult to forecast as a function of future efforts to improve wastewater treatment, which is precisely what is needed for typical water quality assessments such as total maximum daily loads (TMDLMDLMDL). We provide a conceptual framework using simulation to predict effluent BODBODBOD characteristics as a function of improved wastewater treatment. The simulations use equations that describe BODBODBOD kinetics and are able to reproduce trends in f-ratio observed at various pulp and paper facilities and predict BODBODBOD reactivity as a function of treatment.

scholarly journals Harmful Cyanobacteria in Three Oregon Lakes: Comments on Hall et al. Beyond Water Quality Advisories and Total Maximum Daily Loads (TMDLs). Water 2019, 11, 1125

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2482
Author(s):  
Joseph Eilers
Keyword(s):  
Water Quality ◽  
Current System ◽  
Timber Harvest ◽  
The State ◽  
Cyanobacterial Blooms ◽  
Septic Systems ◽  
Total Maximum Daily Loads ◽  
Harmful Cyanobacteria ◽  
Maximum Daily Loads ◽  
Total Maximum

The article “An Ecological Function Approach to Managing Harmful Cyanobacteria in Three Oregon Lakes: Beyond Water Quality Advisories and Total Maximum Daily Loads (TMDLs), Water 11:1125” by Hall et al. critiques the current approach used by the state of Oregon with regard to managing cyanobacterial blooms and offers the proper functioning condition (PVC) as a superior method of managing cyanobacterial blooms in lakes derived from nonpoint sources of pollution. They evaluated three lakes in Oregon as examples of how this approach could be applied to support water quality improvement. Two of the three lakes, Lemolo and Diamond, experienced cyanobacterial blooms, not as a function of nonpoint source loadings from the watershed, but rather because of internal nutrient cycling associated with high fish biomass. The third lake, Tenmile Lakes, in additional to having a greatly altered fish community, also experiences cyanobacterial blooms (CyanoHABs) issues because of timber harvest on steep slopes, loss of wetlands, altered watershed hydrology and nutrient input from septic systems. The authors’ attempts to use satellite images and PVC methodology on the stream networks is incomplete with respect to Tenmile Lakes and is totally misdirected regarding Lemolo and Diamond Lakes. Although I don’t support the current system employed by the state of Oregon to manage lakes experiencing CyanoHABs issues, the proposed approach offered by staff with the U.S. Environmental Protection Agency will yield little water quality benefit for the lakes in question.

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