A general water supply planning model: Evaluation of decentralized treatment

Chung, Gunhui; Lansey, Kevin; Blowers, Paul; Brooks, P. D.; Ela, Wendell P.; Stewart, Steve; Wilson, Paul N.

doi:10.1016/j.envsoft.2007.10.002

Cited by 66 publications

(24 citation statements)

References 21 publications

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“…There is therefore a need to understand the spatial and temporal water availability and to formulate a tool for planning and decision making in prioritisation of water allocation in the basin. However, given the complexity of the system and the interactions between water supply and demand, a large-scale water supply management tool would be useful for decision makers when formulating water management strategies for coping with future changes in water demands (Chung et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Water Allocation as a Planning Tool to Minimise Water Use Conflicts in the Upper Ewaso Ng’iro North Basin, Kenya

Mutiga

Mavengano

et al. 2010

Water Resour Manage

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Inadequate water resources management and a general decline in rainfall have aggravated water scarcity problems in the Upper Ewaso Ng'iro North Basin in Kenya. Furthermore, water use conflicts in the basin have escalated in recent decades due to increased competition for available water resources. Excessive abstraction of the declining river water mainly for irrigation in the Mount Kenya and Nyandarua foot zones often leads to reduced water flow during the dry seasons, greatly affecting downstream water users. Increased water use in the basin coupled with deterioration of the vegetative cover has resulted in reduced water flows in the Ewaso Ng'iro river and its major tributaries. In addition, lack of sufficient knowledge about available water resources and current lack of coordination in water resources management in the basin often result in water deficits which have hampered development in the downstream catchment. The goal of this study was to match the water requirements of various competing sectors in the basin with the available water resources in order to attain both economic and ecological sustainability. To achieve this, GIS techniques were used to quantify the spatial and temporal stream flow. The Water Evaluation and Planning (WEAP) model was applied to evaluate water resources development based on an equilibrium scenario of the current water demand. Water use was simulated for five different sectors (domestic, livestock, wildlife, irrigation and reserve). The analyses revealed that high water demand for irrigation was the main cause of excessive water abstraction particularly in the upstream catchments, giving rise to water shortages and consequently, water use conflicts downstream. The study, therefore, recommends that rainwater harvesting be promoted in the basin in order to improve water availability for productive use.

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Section: Introductionmentioning

confidence: 99%

Water Allocation as a Planning Tool to Minimise Water Use Conflicts in the Upper Ewaso Ng’iro North Basin, Kenya

Mutiga

Mavengano

et al. 2010

Water Resour Manage

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“…Ahmad and Simonovic (2006) used SD to develop a decision support system for management of floods. Chung et al (2008) presented a SD based water supply planning model for urban settings.…”

Section: System Dynamicsmentioning

confidence: 99%

Evaluating Municipal Water Conservation Policies Using a Dynamic Simulation Model

Ahmad

Prashar

2010

Water Resour Manage

125

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A dynamic simulation model is developed for South Florida to capture the interrelationships between water availability and competing municipal, agricultural, and environmental water demands. This paper presents the model structure and findings related to municipal water demand and potential for water conservation. The policies of introducing low flow appliances, xeriscaping, and pricing are tested for their effectiveness in reducing municipal water demand. Performance criteria of reliability, resilience, and vulnerability are used to measure the success of policies. Policies are also evaluated for their impact on environmental flow requirements. The model is calibrated using data from 1975 to 2005 for population growth, municipal water demand, and water levels in Lake Okeechobee; and simulations are carried out from 2005 to 2030 on a monthly time step. Sensitivity analysis is performed and extreme condition tests are conducted to evaluate the robustness of the model. The status-quo (defined as no changes in the current water use patterns) simulations show a reduction in environmental flows after 2010 leading to an increase in the number of minimum flow level violations. Policies tested show potential for a reduction in municipal demand and for improvement in environmental flows.

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“…For example, the interactions between population and water supplies can directly cause complex water utilization among various end users. This makes it critical to clarify the interactions among system factors and those intimately involved in the planning process (Chung et al, 2008).…”

Section: Overview Of Water and Farmland Use Management System With Nomentioning

confidence: 99%

A dual-inexact fuzzy stochastic model for water resources management and non-point source pollution mitigation under multiple uncertainties

Dong

Tan

Huang

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. In this research, a dual-inexact fuzzy stochastic programming (DIFSP) method was developed for supporting the planning of water and farmland use management system considering the non-point source pollution mitigation under uncertainty. The random boundary interval (RBI) was incorporated into DIFSP through integrating fuzzy linear programming (FLP) and chance-constrained programming (CCP) approaches within an interval linear programming (ILP) framework. This developed method could effectively tackle the uncertainties expressed as intervals and fuzzy sets. Moreover, the lower and upper bounds of RBI are continuous random variables, and the correlation existing between the lower and upper bounds can be tackled in RBI through the joint probability distribution function. And thus the subjectivity of decision making is greatly reduced, enhancing the stability and robustness of obtained solutions. The proposed method was then applied to solve a water and farmland use planning model (WFUPM) with non-point source pollution mitigation. The generated results could provide decision makers with detailed water supply-demand schemes involving diversified water-related activities under preferred satisfaction degrees. These useful solutions could allow more in-depth analyses of the trade-offs between humans and environment, as well as those between system optimality and reliability. In addition, comparative analyses on the solutions obtained from ICCP (Interval chance-constraints programming) and DIFSP demonstrated the higher application of this developed approach for supporting the water and farmland use system planning.

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A general water supply planning model: Evaluation of decentralized treatment

Cited by 66 publications

References 21 publications

Water Allocation as a Planning Tool to Minimise Water Use Conflicts in the Upper Ewaso Ng’iro North Basin, Kenya

Water Allocation as a Planning Tool to Minimise Water Use Conflicts in the Upper Ewaso Ng’iro North Basin, Kenya

Evaluating Municipal Water Conservation Policies Using a Dynamic Simulation Model

A dual-inexact fuzzy stochastic model for water resources management and non-point source pollution mitigation under multiple uncertainties

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