Simulation Model for Optimal Operation of Dokan Dam Reservoir Northern of Iraq

Due to the limitation of water renewable resources on one hand and increasing growth in consuming water in different parts such as agriculture, industry, urban, and the environment in other hand, face management of these valuable resources to many challenges. Present study attempts to clarify recent condition of the problem and introduce effective management tools in water supply sector. In order to achieve this purpose, simulating model HEC-Res Sim was used for Dokan Dam to study the operational behavior of the reservoir and to investigate the model capability in representing and simulating the real system. The study based on monthly discharge data for the period from 1986 to 2016 measured at the inlet of Dokan Dam reservoir. The results of the current study were compared and evaluated against those counterparts observed data using two statistical metrics, correlation coefficient and Nash- Sutcliff coefficient efficiency. Moreover, an empirical formula was found linking the amount of inflow to the reservoir with the amount of outflow. The results showed that the HEC-ResSim 3.0 performed well in simulating the monthly discharges. Therefore, HEC-ResSim 3.0 could be used for better water system analysis in this study area.

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Long-term Monthly Discharge Prediction for Cimanuk Watershed

Agromet ◽

10.29244/j.agromet.33.2.96-104 ◽

2019 ◽

Vol 33 (2) ◽

pp. 96-104

Author(s):

Marliana Tri Widyastuti ◽

Muh Taufik

Keyword(s):

Resource Planning ◽

Assessment Tools ◽

Climate Data ◽

Discharge Data ◽

Hydrological Response Unit ◽

Streamflow Data ◽

Monthly Discharge ◽

Influential Parameters ◽

Statistical Metrics

Although streamflow data is important for water resource planning, it’s long-term availability for Indonesian rivers is limited. One factor could be identified for example lack of observation. Here, we presented observation-based modeling to predict long-term discharge data for Cimanuk watershed in Indonesia. The watershed is categorized as one of the critical watersheds, meanwhile it supports to more than one million people. A well-known hydrological model called Soil and Water Assessment Tools (SWAT) was used to predict monthly discharge. The model was fed with monthly climate data, topography, land use and soil characteristics. We calibrated the model with the observed data from 1974 to 1994 (20 years). Our results showed that the model was a good performance in estimating monthly discharge as indicated by three statistical metrics used. Based on statistical evaluation, the calibration resulted a low percent bias (3.20%), strong correlation (0.73), and high Kling-Gupta Efficiency (0.78). Further, we did a sensitivity analysis for the model, and we found that hydrological response unit was the most influential parameters for the Cimanuk watershed. A long-term discharge data indicated a monsoonal pattern for this watershed.

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Iterative LP water system optimal operation including headloss, leakage, total head and source cost

Journal of Hydroinformatics ◽

10.2166/hydro.2013.124 ◽

2013 ◽

Vol 15 (4) ◽

pp. 1203-1223 ◽

Cited By ~ 3

Author(s):

Eyal Price ◽

Avi Ostfeld

Keyword(s):

Energy Consumption ◽

Water System ◽

Pump Energy ◽

Optimal Operation ◽

Water Levels ◽

Water Leakage ◽

Pump Operation ◽

Total Head ◽

System Optimal ◽

Water Tanks

Linear water balance optimal operation models are common with relative short solution times but suffer from a lack of certainty whether the given solution is at all hydraulically feasible. Introducing hydraulic headloss, water leakage and changing pump energy consumption, effect the resulting system optimal operation but also create a non-linear problem due to the convex relation between flow, headloss, water leakage and total head. This study utilizes a methodology published by the authors for linearization of convex or concave equations. An iterative linear programming (LP) minimal cost optimal operation supply model is solved including the Hazen–Williams headloss equation, pressure related water leakage equation, changing pump energy consumption and source cost. The model is demonstrated using an example application. ‘Greater than’ or ‘less than’ water head constraints at nodes may force the system to maintain certain water levels in water tanks reducing the available operating volume forcing pumping stations to operate in peak tariff periods as less storage is available in low tariff periods. Operationally, reducing water leakage may be achieved by reducing water heads along the system by means of shifting pump operation periods and maintaining low water levels in water tanks. Source costs may serve as penalties or rewards discouraging or encouraging the use of certain water sources.

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Storm Water System Analysis Integrating MMS, GIS and Cad Mapping for Decision Support

Proceedings of the Water Environment Federation ◽

10.2175/193864704784136333 ◽

2004 ◽

Vol 2004 (11) ◽

pp. 345-356

Author(s):

Amanda McInnis ◽

David Keil ◽

Michael Kasch ◽

John Rundquist

Keyword(s):

Decision Support ◽

System Analysis ◽

Water System ◽

Storm Water

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Optimal operation strategy for subway HVAC system in transition seasons

E3S Web of Conferences ◽

10.1051/e3sconf/201911103006 ◽

2019 ◽

Vol 111 ◽

pp. 03006

Author(s):

Yue Zhang ◽

Xiaofeng Li ◽

Bin Wang ◽

Zheren Song

Keyword(s):

Energy Saving ◽

Calculation Method ◽

Operation Mode ◽

Water System ◽

Optimal Operation ◽

Operation Strategy ◽

Ventilation Mode ◽

Switching Condition ◽

System Temperature ◽

Switching Temperature

This paper mainly studied the operation strategy for subway VAC system during transition seasons. Two modes including WF-AC (Whole Fresh air- Air Conditioning) mode and B/E-V (Back/Exhausted fan-Ventilation) mode were selected based on energy saving principle. In order to decide the optimal operation mode, the calculation method of “switching temperature” was proposed. The main influencing factors of the switching condition include indoor cooling load, COP of the chilled-water-system, temperature difference of the supply air, efficiency of fan and the resistance of air duct. Also, the transfer temperature diagram is provided based on proposed calculation method, which is suitable for engineering use. The aim of this study is to regulate the operation mode and to promote energy saving in subway station.

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Chilled Water System Analysis Tool (CWSAT) and Application to Manufacturing Plants

10.4271/2013-01-0832 ◽

2013 ◽

Author(s):

Alex R. Quintal ◽

Ghanshym Gaudani ◽

Dragoljub Kosanovic

Keyword(s):

System Analysis ◽

Water System ◽

Analysis Tool ◽

Manufacturing Plants ◽

Chilled Water ◽

Chilled Water System

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A Computer-Assisted Water System Analysis and Design for Charleston, S.C.

American Water Works Association ◽

10.1002/j.1551-8833.1984.tb05371.x ◽

1984 ◽

Vol 76 (7) ◽

pp. 82-89

Author(s):

Raymond E. Topping ◽

Robert J. Puccia

Keyword(s):

System Analysis ◽

Water System ◽

Computer Assisted ◽

System Analysis And Design ◽

Analysis And Design

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Optimal Operation of Multireservoir Systems by Enhanced Water Cycle Algorithm

International Journal of Software Innovation ◽

10.4018/ijsi.2019010102 ◽

2019 ◽

Vol 7 (1) ◽

pp. 27-43

Author(s):

Yanjun Kong ◽

Yadong Mei ◽

Weinan Li ◽

Ben Yue ◽

Xianxun Wang

Keyword(s):

Water Cycle ◽

Water System ◽

System Size ◽

Optimal Operation ◽

Test Functions ◽

Water Cycle Algorithm ◽

Adaptive Parameter ◽

Fitness Value ◽

Better Than

In this article, an enhanced water cycle algorithm (EWCA) is proposed and applied to optimize the operation of multireservoir systems. Three improvements have been made to the water cycle algorithm (WCA). They refer to high-quality initial solutions obtained by the chaos-based method, balancing of exploration of streams using a dynamic adaptive parameter, and dynamic variation of sub-water system size using the fitness value of rivers. For the purpose of verifying the improvements, three typical benchmark functions were selected as test functions. It has shown that EWCA performs better than WCA and water cycle algorithm with evaporation rate (ER-WCA). And then these three algorithms were also applied to optimize the operation of a multireservoir system with complex constrains as the case study. By comparing the results, it is found that the EWCA has higher ability to find a feasible solution in a narrow searching space. The effectiveness of the improvements is confirmed.

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