assimilative capacity analysis and total maximum daily load strategy for smart water management

2020 ◽  
Author(s):  
Chia-Ling Chang
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Water Systems ◽  
Total Maximum Daily Load ◽  
Assimilative Capacity ◽  
Smart Water ◽  
Environmental Development ◽  
The Impact ◽  
Total Maximum ◽  
Daily Load

<p>Due to steep terrain, uneven rainfall, and high-speed streams, Taiwan's water environmental vulnerability is relatively high. Under the impact of climate change and environmental variation, Taiwan faces more and more challenges in water environmental management. Although environmental development can bring economic benefit, it can also impact the environment. Therefore, it is important to consider environmental assimilative capacity for maintaining a balance condition between environmental development and environmental protection. This study assesses the environmental assimilative capacity of several water systems in Taiwan. The total maximum daily load (TMDL) strategy considers water quality management from effluent-based control to ambient-based management to protect waterbodies based on their assimilative capacity. It is determined by a target water quality concentration and the assimilative capacity of the receiving waterbody. The concept of TMDL is similar in flood management and control. The purpose of this study is to discuss the total maximum environmental assimilative capacity of these water systems and to propose smart water management strategies for decreasing the water environmental risk and impact. Highly flexible and intelligent water management is essential for sustainable environmental development.</p>

Water quality improvement by implementation of Proposition O in the Los Angeles river watershed, California

2008 ◽  
Vol 58 (12) ◽  
pp. 2271-2278 ◽  
Author(s):  
Mi-Hyun Park ◽  
Stephanie Pincetl ◽  
Michael K. Stenstrom
Keyword(s):  
Water Quality ◽  
Los Angeles ◽  
Total Maximum Daily Load ◽  
Water Quality Standards ◽  
River Watershed ◽  
Los Angeles River ◽  
The City ◽  
Total Maximum ◽  
Daily Load

Proposition O was created to help the City of Los Angeles comply with the Total Maximum Daily Load (TMDL) requirements under the Clean Water Act. In this study, the effectiveness of the Proposition O projects in Los Angeles River watershed was examined to show whether it achieves the goal of meeting water quality standards. Our analysis shows the most effective single project will remove at most 2% of pollutant loads from Los Angeles River Watershed and will not achieve TMDL compliance, although several projects can make important contributions to achieve compliance. The ranking results show that the projects that treat the runoff from the largest drainage area have the greatest impact on the water quality of Los Angeles river.

scholarly journals Total maximum daily loads of beton reservoir, Gunungkidul Regency, Indonesia during the rainy season

2020 ◽  
Vol 200 ◽  
pp. 01006
Author(s):  
Febby Firizqi ◽  
Margaretha Widyastuti
Keyword(s):  
Water Quality ◽  
Rainy Season ◽  
Water Discharge ◽  
Total Maximum Daily Load ◽  
Water Quality Standards ◽  
Hydrological Characteristics ◽  
Maximum Daily Loads ◽  
Total Maximum ◽  
Daily Load ◽  
Special Region

A total maximum daily load (TMDL) is an integrated mechanism to maintain water body to meet the water quality standards of its designated uses. This research was intended to determine the TMDL of Beton Reservoir, a structure built to regulate the water discharge of Beton karst spring in Gunungkidul, Indonesia, especially during the rainy season. The TMDL calculation referred to the Regulation of the Minister of State for Environment No. 28 of 2009 on TMDLs of Lakes and/or Reservoirs that required a calculation of morphological and hydrological characteristics, and water quality to meet Class II standard issued in the Regulation of the Governor of the Special Region of Yogyakarta No. 20 of 2008. The results showed that Beton Reservoir had a total volume of 22 586.83 m3, a surface area of 18 673.12 m2, and a depth of averagely 1.21 m and released water at a rate of 0.48 m3 s–1. From the perspective of quality, the TSS and DO of its water had exceeded the standards, whereas the other parameters: temperature, TDS, pH, BOD, COD, total PO4, and NO3 were within their allowable presence in the water. Based on TMDLs for TSS, DO, BOD, COD, total PO4, and NO3, the Beton Reservoir can no longer accommodate TSS and NO3 while continuing to meet the standards for these pollutants. High levels of TSS and NO3 are attributable to the agricultural activities taking place on the catchment and the flow concentration typical of karst regions.

Investigation of river eutrophication as part of a low dissolved oxygen total maximum daily load implementation

2009 ◽  
Vol 59 (1) ◽  
pp. 9-14 ◽  
Author(s):  
William Stringfellow ◽  
Joel Herr ◽  
Gary Litton ◽  
Mark Brunell ◽  
Sharon Borglin ◽  
...  
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Mass Balance ◽  
The United States ◽  
Total Maximum Daily Load ◽  
Phytoplankton Growth ◽  
Balance Model ◽  
Nutrient Inputs ◽  
Total Maximum ◽  
Daily Load

In the United States, environmentally impaired rivers are subject to regulation under total maximum daily load (TMDL) regulations that specify watershed wide water quality standards. In California, the setting of TMDL standards is accompanied by the development of scientific and management plans directed at achieving specific water quality objectives. The San Joaquin River (SJR) in the Central Valley of California now has a TMDL for dissolved oxygen (DO). Low DO conditions in the SJR are caused in part by excessive phytoplankton growth (eutrophication) in the shallow, upstream portion of the river that create oxygen demand in the deeper estuary. This paper reports on scientific studies that were conducted to develop a mass balance on nutrients and phytoplankton in the SJR. A mass balance model was developed using WARMF, a model specifically designed for use in TMDL management applications. It was demonstrated that phytoplankton biomass accumulates rapidly in a 88 km reach where plankton from small, slow moving tributaries are diluted and combined with fresh nutrient inputs in faster moving water. The SJR-WARMF model was demonstrated to accurately predict phytoplankton growth in the SJR. Model results suggest that modest reductions in nutrients alone will not limit algal biomass accumulation, but that combined strategies of nutrient reduction and algal control in tributaries may have benefit. The SJR-WARMF model provides stakeholders a practical, scientific tool for setting remediation priorities on a watershed scale.

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