Operational hydrology with forecasting for a multireservoir water resources system

1979 ◽  
Vol 6 (3) ◽  
pp. 355-364
Author(s):  
Robert M. Thompstone
Keyword(s):  
Parameter Estimation ◽  
Water Resources ◽  
River Flow ◽  
Synthetic Data ◽  
Stochastic Modelling ◽  
Water Resources System ◽  
Water Resources Systems ◽  
Operating Strategies

One of the tools used by the water resources engineer in developing operating strategies for water resources systems is operational hydrology—the stochastic modelling of a hydrologic phenomenon such as river flow in order to generate a large number of possible future occurrences of the phenomenon. This paper describes the selection and parameter estimation of a multisite multiseason model for application to five sites of a hydroelectric system operated by Alcan Smelters and Chemicals Limited in the Saguenay – Lac St-Jean region of Quebec. The model is used to generate synthetic inflow data and compute corresponding forecasts. The model is evaluated with respect to its ability to both generate realistic synthetic data and produce meaningful forecasts.

scholarly journals Water resources data, models and decisions: international expert opinion on knowledge management for an uncertain but resilient future

2018 ◽  
Vol 21 (1) ◽  
pp. 32-44 ◽  
Author(s):  
Sarah Ward ◽  
D. Scott Borden ◽  
Amos Kabo-bah ◽  
Abdul Nasirudeen Fatawu ◽  
Xavier Francis Mwinkom
Keyword(s):  
Decision Making ◽  
Knowledge Management ◽  
Water Resources ◽  
Capacity Planning ◽  
River Flow ◽  
Data Models ◽  
Data Availability ◽  
Planning Under Uncertainty ◽  
Water Resources Systems ◽  
Wide Range

Abstract Assessing the resilience of water resources systems requires knowledge of properties and performance, which depends on data availability and use within models and decision making. Connections between data, models and decision making are crucial to plan for uncertainty and invest in interventions. To explore international perceptions of these connections, we conducted a three-round Delphi survey with an expert panel (see Supplementary material, available with the online version of this paper). Consensus and divergence existed within and between countries on ability to manage data, modelling and decision making, with the most consensus seen on use of hydrometric databases. There was a wide range of models and tools utilised by participants and a shift occurred between first and second rounds to a preference for trying new modelling. There was consensus between and within all countries that every data type was important. River flow data consistently scored highest. Access to data and models primarily impacted evaluating future capacity, planning under uncertainty, policy implementation and conflict resolution. The panel called for reviewing existing and developing new policy, collaborative research and available funding all focusing on water resources data-model-decision integration. Findings offer a strategic view on knowledge management regarding connections between data, models and decision making through identification of consensus areas for future focus and dissensus areas for reprioritisation.

scholarly journals Decentralized calibration process for distributed water resources systems using the self-adaptive multi-memory melody search algorithm

2021 ◽  
Author(s):  
Seyed Mohammad Ashrafi ◽  
Maral Mahmoudi
Keyword(s):  
Water Resources ◽  
Search Algorithm ◽  
System Modeling ◽  
Computation Time ◽  
Computational Accuracy ◽  
Water Resources System ◽  
Water Resources Systems ◽  
Simulation And Optimization ◽  
Definition Of ◽  
Self Adaptive

Abstract Having systematic simulation and optimization models with high computational accuracy is one of the most important problems in developing decision support systems. In the present research, a specific methodology was proposed for decentralized calibration of complex water resources system models by using the structural capabilities of the melody search algorithm. This methodology was implemented in the framework of a self-adaptive simulation–optimization model that helps fine-tune complex water resources models by introducing a new definition of the way sub-memories are related to each. The introduced structure aims to achieve the highest possible level of consistency, which is estimated by using different criteria, between model results and observed data at several control points of surface flows. The introduced strategy was put to the test in developing a water resources model for the Great Karun Watershed, Iran, and was found to produce accurate results compared to some other well-known optimization algorithms such as GA, HS, PSO, SGHS, EMPSO, and SaMeS. In an attempt to determine the effect of calibration on water resources system modeling, 16 calibration models of different dimensions are developed and their computational costs are compared in terms of their computation time and effects on the accuracy of the results.

scholarly journals WRSS: An Object-Oriented R Package for Large-Scale Water Resources Operation

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3037
Author(s):  
Rezgar Arabzadeh ◽  
Parisa Aberi ◽  
Sina Hesarkazzazi ◽  
Mohsen Hajibabaei ◽  
Wolfgang Rauch ◽  
...  
Keyword(s):  
Water Resources ◽  
Single Unit ◽  
Large Scale ◽  
Object Oriented ◽  
R Package ◽  
Planning System ◽  
Return Flow ◽  
Coding System ◽  
Water Resources System ◽  
Water Resources Systems

Water resources systems, as facilities for storing water and supplying demands, have been critically important due to their operational requirements. This paper presents the applications of an R package in a large-scale water resources operation. The WRSS (Water Resources System Simulator) is an object-oriented open-source package for the modeling and simulation of water resources systems based on Standard Operation Policy (SOP). The package provides R users several functions and methods to build water supply and energy models, manipulate their components, create scenarios, and publish and visualize the results. WRSS is capable of incorporating various components of a complex supply–demand system, including numerous reservoirs, aquifers, diversions, rivers, junctions, and demand nodes, as well as hydropower analysis, which have not been presented in any other R packages. For the WRSS’s development, a novel coding system was devised, allowing the water resources components to interact with one another by transferring the mass in terms of seepage, leakage, spillage, and return-flow. With regard to the running time, as a key factor in complex models, WRSS outshone the existing commercial tools such as the Water Evaluation and Planning System (WEAP) significantly by reducing the processing time by 50 times for a single unit reservoir. Additionally, the WRSS was successfully applied to a large-scale water resources system comprising of 5 medium- to large-size dams with 11 demand nodes. The results suggested dams with larger capacity sizes may meet agriculture sector demand but smaller capacities to fulfill environmental water requirement. Additionally, large-scale approach modeling in the operation of one of the studied dams indicated its implication on the reservoirs supply resiliency by increasing 10 percent of inflow compared with single unit operation.

ECOLOGY AND SUSTAINABLE DEVELOPMENT IN LOCAL BUSINESS:SIMULATION OF LOW IMPACT DEVELOPMENT IN SURAKARTA REGENCY

2018 ◽  
Vol 4 (1) ◽  
pp. 32-38
Author(s):  
Bhimo Rizky Samudro ◽  
Yogi Pasca Pratama
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
River Flow ◽  
Low Impact Development ◽  
Development Model ◽  
Business Activity ◽  
Resources Management ◽  
Central Java ◽  
Specific Culture ◽  
Central Java Province

This paper will describe the function of water resources to support business activities in Surakarta regency, Central Java province. Surakarta is a business city in Central Java province with small business enterprises and specific culture. This city has a famous river with the name is Bengawan Solo. Bengawan Solo is a River Flow Regional (RFR) to support business activities in Surakarta regency. Concious with the function, societies and local government in Surakarta must to manage the sustainability of River Flow Regional (RFR) Bengawan Solo. It is important to manage the sustainability of business activity in Surakarta regency.   According to the condition in Surakarta regency, this paper will explain how the simulation of Low Impact Development Model in Surakarta regency. Low Impact Development is a model that can manage and evaluate sustainability of water resources in River Flow Regional (RFR). Low Impact Development can analys goals, structures, and process water resources management. The system can also evaluate results and impacts of water resources management. From this study, we hope that Low Impact Development can manage water resources in River Flow Regional (RFR) Bengawan Solo.  

Sewage Treatment Challenges and Opportunities in the Nottawasaga River Watershed

1997 ◽  
Vol 32 (4) ◽  
pp. 733-750
Author(s):  
R. Mark Palmer
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Management Strategy ◽  
River Flow ◽  
Computer Modelling ◽  
Treatment Plan ◽  
Sewage Treatment ◽  
Nutrient Inputs ◽  
River Watershed ◽  
Resources Management

Abstract Sewage treatment studies at the watershed scale, compared to case-by-case community projects, ensures the most cost-efficient investment of funds commensurate with environmental requirements to sustain growth. A three-year environmental assessment study for the town of New Tecumseth, Ontario, examined all nutrient inputs to the Nottawasaga River watershed. Other challenging watershed constraints were investigated, such as stream and river flow takings for irrigation and sediment transport, prior to the selection of the master sewage treatment plan. The findings from the field research and computer modelling were used to (1) place a realistic perspective on nutrient impacts, present and future, attributable to treated sewage effluent; (2) design a master plan that could be used as an opportunity in terms of reusing the effluent locally for agricultural irrigation; (3) provide a real-time assurance of the plan’s performance/compliance, based on the actual carrying capacity of the aquatic ecosystem; (4) stage the construction of the plan in a cost-effective and environmentally sound manner; and (5) recommend a water resources management strategy to control other nutrient and sediment load sources within the watershed. The recommended master sewage treatment plan and water resources management strategy can restore the Ministry of Environment and Energy provincial water quality objective concentration for total phosphorus within the river during 7Q20 flow conditions.

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