Financially sustainable management strategies for urban wastewater collection infrastructure – development of a system dynamics model

Rehan, Rashid; Unger, André; Knight, Mark; Haas, Carl T.

doi:10.1016/j.tust.2012.12.003

Cited by 60 publications

(53 citation statements)

References 32 publications

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“…The I/I was related to inflow of relatively cold stormwater at that location in a cold night (3 • C) from the misconnected roof and yard drains. With using upstream and downstream temperatures recorded by the DTS (Figure 10b), and assuming the stormwater temperature to be equal to the air temperature, the relative contribution of inflow with respect to upstream volume was derived according to Equation (2) (Figure 10c). The dominated temperature of wastewater before inflow was around 8.2 • C and stormwater inflow with a temperature equal to the surrounding temperature (around 3.1-3.7 • C) decreased the temperature of the wastewater significantly.…”

Section: Rainfall-derived I/i Assessmentmentioning

confidence: 99%

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Quantification Assessment of Extraneous Water Infiltration and Inflow by Analysis of the Thermal Behavior of the Sewer Network

Beheshti

Sægrov

2018

Water

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Infiltration and inflow (I/I) of unwanted water in separate urban sewer networks are critical issues for sustainable urban water management. Accurate quantification of unwanted water I/I from individual sources into a sewer system is an essential task for assessing the status of the sewer network and conducting rehabilitation measures. The study aim was to quantify extraneous water I/I into a sanitary sewer network by a temperature-based method, i.e., fiber-optic distributed temperature sensing (DTS), which was applied for the first time in a separate sewer network of a catchment in Trondheim, Norway. The DTS technology is a relatively new technology for sewer monitoring, developed over the past decade. It is based on continual temperature measurement along a fiber-optic cable installed in the sewer network. The feasibility of this method has been tested in both experimental discharges and for the rainfall-derived I/I. The results achieved from the monitoring campaign established the promising applicability of the DTS technique in the quantification analysis. Furthermore, the application of this method in quantifying real-life, rainfall-derived I/I into the sewer system was demonstrated and verified during wet weather conditions. Keywords: distributed temperature sensing (DTS); extraneous water infiltration and inflow (I/I); rainfall-derived infiltration and inflow; sewer system; stormwater management; sustainable urban water management

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Section: Rainfall-derived I/i Assessmentmentioning

confidence: 99%

“…Representing a high asset value [1], urban sewer systems in most cities all over the world are undergoing deterioration due to aging [2]. Thus, accurate monitoring, maintenance and rehabilitation are necessary for their preservation.…”

Section: Introductionmentioning

confidence: 99%

Quantification Assessment of Extraneous Water Infiltration and Inflow by Analysis of the Thermal Behavior of the Sewer Network

Beheshti

Sægrov

2018

Water

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“…The work of Jin et al [35] incorporates the system dynamics approach into the ecological footprint for forecasting the ecological footprint. In Rehan et al [36], the authors developed causal loop diagrams and a system dynamics model to support the financially sustainable management of urban water distribution networks. A different approach to waterrelated issues is the one shown by [34].…”

Section: System Dynamics Modeling For the Water Footprint In The Biofmentioning

confidence: 99%

A system dynamics approach for estimating the water footprint of the bioethanol supply chain in the region of Orizaba in the State of Veracruz, Mexico

Trujillo-Mata

Cortés-Robles

Sánchez-Ramírez

et al. 2016

WIT Transactions on Ecology and the Environment

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The global pressure to reduce emissions combined with the negative tendency in the world oil reserves is impelling the improvement and development of renewable sources of energy. The bioethanol industry is one of the most active sectors. Under this environment, the market is facing a conflict: to increase productivity (more resources consumed), without compromising the future natural resources. In emergent countries as Mexico, there is not yet a well-developed biofuels supply chain. However, it is growing at a regular pace. As the bioethanol industry accelerates its productivity and market share, another renewable resource suffers for this expansion: the water reserves. This work proposes to integrate the Bioethanol Supply Chain Analysis with the Water Footprint Assessment. Nevertheless, water changes in time under the influence of several factors, producing a complex and dynamic behavior. Therefore, a system dynamics model to evaluate the water footprint of the bioethanol supply chain enables the capacity to simulate the impact of bioethanol production on water resources over time in the city of Orizaba in the State of Veracruz, Mexico.

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“…A dynamic flow diagram is used to depict the logical relationship between system factors with symbols [35]. This study uses a dynamic flow diagram to clear the feedback form and control the law of the system.…”

Section: Model Designmentioning

confidence: 99%

Impact Analysis of Air Pollutant Emission Policies on Thermal Coal Supply Chain Enterprises in China

Guo

Yuan

2014

Sustainability

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Spurred by the increasingly serious air pollution problem, the Chinese government has launched a series of policies to put forward specific measures of power structure adjustment and the control objectives of air pollution and coal consumption. Other policies pointed out that the coal resources regional blockades will be broken by improving transportation networks and constructing new logistics nodes. Thermal power takes the largest part of China's total installed power generation capacity, so these policies will undoubtedly impact thermal coal supply chain member enterprises. Based on the actual situation in China, this paper figures out how the member enterprises adjust their business decisions to satisfy the requirements of air pollution prevention and control policies by establishing system dynamic models of policy impact transfer. These dynamic analyses can help coal enterprises and thermal power enterprises do strategic environmental assessments and find directions of sustainable development. Furthermore, the policy simulated results of this paper provide the Chinese government with suggestions for policy-making to make sure that the energy conservation and emission reduction policies and sustainable energy policies can work more efficiently.

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Financially sustainable management strategies for urban wastewater collection infrastructure – development of a system dynamics model

Cited by 60 publications

References 32 publications

Quantification Assessment of Extraneous Water Infiltration and Inflow by Analysis of the Thermal Behavior of the Sewer Network

Quantification Assessment of Extraneous Water Infiltration and Inflow by Analysis of the Thermal Behavior of the Sewer Network

A system dynamics approach for estimating the water footprint of the bioethanol supply chain in the region of Orizaba in the State of Veracruz, Mexico

Impact Analysis of Air Pollutant Emission Policies on Thermal Coal Supply Chain Enterprises in China

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