Dynamic modelling of integrated water resources quality management

Abstract

Basin-scale water resources decisions need to have a decision support system (DSS) that models all water quantity and quality elements. Common integrated water resources management (IWRM) models such as Weap and Modsim can quantitatively model a water system well. However, although certain insertions to such software have been incorporated to simulate quality parameters in rivers, none of these can model such parameters in reservoirs. To solve this issue, researchers have coupled IWRM models with water quality models of reservoirs (WQMRs). WQMRs such as Cequal-W2 usually require voluminous and various input and output information. They are not user friendly and have a high running time. Because of these shortcomings, coupled IWRM and WQMR models cannot be considered as a DSS to assess a variety of scenarios. This paper represents an attempt to introduce a DSS based on the system dynamics approach to utilise in basin-scale integrated water resources quantitative and qualitative management. The proposed model uses a one-dimensional water quality approach for the reservoir to overcome the quality modelling disadvantages of IWRM models. The final results of the proposed model for different scenarios are compared with Modsim and Cequal-W2. Notation A, Breal positive parameters C in total dissolved solid concentration in inlet stream (t/million m 3 ) C out total dissolved solid concentration in reservoir or outlet stream (t/million m 3 ) C t reservoir total dissolved solid concentration at time t (t/million m 3 ) C 0 reservoir total dissolved solid concentration at time 0 (t/million m 3 ) Q water source discharge rate Q D , Q S amounts of river discharge at control points D and S Q in dam inflow (million m 3 /month) Q K K sub-basin discharge Q out dam outflow (million m 3 /month) t time (months) V reservoir volume (million m 3 ) V 0 reservoir volume at time 0 (million m 3 )

Dynamic water system modeling: a systematic review

“…Researchers such as Mohammad Azmi, Nima Heidarzadeh, Sajjad Ahmad, Ali Mirchi, Kaveh Madani, David Watkins, Sajjad Ahmad, and the renowned Dr Slobodan P. Simonovic all refer to the origin of dynamic systems in their works and recognize Forrester as the first to mention complex dynamic systems in 1958 (Forrester 1968;Ahmad & Simonovic 2004;Mirchi et al 2012;Azmi & Heidarzadeh 2013).…”

Aplicación del modelo CE QUAL-W2 : una aproximación a la estructura térmica en el embalse Miguel Martínez Isaza, Concordia, Antioquia, Colombia

“…El desempeño del modelo para la predicción de la temperatura del embalse se calcula por medio del estadístico error medio absoluto (AME) mostrado en la ecuación (1); este es el mejor indicador de desempeño del modelo, ya que es directamente interpretable y se ha aplicado a múltiples casos de estudio [9], [25]. Utilizando (1):…”

Editorial

“…The model can be applied at different scales and levels of basin complexity and fills an important gap in the accessibility of sophisticated modelling in the practical time-frames of decision-making. It will be interesting to follow potential interaction between a focus on a systems approach to the learning and behavioural aspects of IWRM Pollard and Du Toit, 2011) with the practical, physical systems modelling developed by Azmi and Heidarzadeh (2013).Moving towards the practice of IWRM means taking large-scale contexts into account when making smaller-scale decisions. Raju and Nagesh Kumar (2013) present the challenge of selecting intervention sites to rehabilitate Indian landscapes toward the wise use of water for agricultural production.…”

“…The model can be applied at different scales and levels of basin complexity and fills an important gap in the accessibility of sophisticated modelling in the practical time-frames of decision-making. It will be interesting to follow potential interaction between a focus on a systems approach to the learning and behavioural aspects of IWRM Pollard and Du Toit, 2011) with the practical, physical systems modelling developed by Azmi and Heidarzadeh (2013).…”

“…The issue concludes at an experiment scale, where scale effects of velocity on incipient cavitation are presented. Azmi and Heidarzadeh (2013) use total dissolved solids as a onedimensional surrogate for water quality and provide a basin-scale model that enables managers and decision-makers to take concurrent account of flow and salinity changes through reservoirs and linking river sections. Combining quantitative data and qualitative scenario-building provides a flexible capacity to assess alternative development options effectively.…”