scholarly journals A review of conjunctive GW-SW management by simulation–optimization tools

2021 ◽  
Author(s):  
Shima Soleimani ◽  
Omid Bozorg-Haddad ◽  
Arezoo Boroomandnia ◽  
Hugo A. Loáiciga
Keyword(s):  
Water Resources ◽  
Water Resource Management ◽  
Simulation Optimization ◽  
Management Strategies ◽  
Optimization Methods ◽  
Conjunctive Use ◽  
Optimization Techniques ◽  
Hydrologic Models ◽  
Water Resources Systems ◽  
Simulation And Optimization

Abstract The conjunctive use of groundwater and surface water (GW-SW) resources has grown worldwide. Optimal conjunctive water use can be planned by coupling hydrologic models for the simulation of water systems with optimization techniques for improving management strategies. The coupling of simulation and optimization methods constitutes an effective approach to determine sustainable management strategies for the conjunctive use of these water resources; yet, there are challenges that must be addressed. This paper reviews (1) hydrologic models applied for the simulation of GW-SW interaction in the water resources systems, (2) conventional optimization methods, and (3) published works on optimized conjunctive GW-SW use by coupling simulation and optimization methods. This paper evaluates the pros and cons of GW-SW simulation tools and their applications, thus providing criteria for selecting simulation–optimization methods for GW-SW management. In addition, an assessment of GW-SW simulation–optimization tools applied in various studies over the world creates valuable knowledge for selecting suitable simulation–optimization tools in similar case studies for sustainable water resource management under multiple scenarios.

Optimizing the management of complex water resources systems taking into account the long-term persistence in streamflow

2020 ◽  
Author(s):  
Amaury Tilmant ◽  
Vahid Espanmanesh
Keyword(s):  
Time Series ◽  
Water Resources ◽  
Optimization Techniques ◽  
Irrigated Agriculture ◽  
Water Resources Systems ◽  
Trade Offs ◽  
Conflicting Objectives ◽  
Operating Policies ◽  
Dual Dynamic Programming

<p>The operation of multireservoir systems is a challenging decision-making problem due to (i) multiple, often conflicting, objectives (e.g. hydropower generation versus irrigated agriculture), (ii) stochastic variables (e.g. inflows, water demands, commodity prices), (iii) nonlinear relationships, (e.g. hydropower production function) and (iv) trade-offs between immediate and future consequences. Properly capturing the properties of the hydrologic processes responsible for the inflows is of paramount importance to enhance the performance of water resources systems. This becomes all the more relevant since low-frequency climate signals, which affect the hydrology in numerous regions around the globe, has increased in recent years. If traditional time series models generally fail to reproduce this regime-like behavior, so are the optimization models that are used to support multireservoir operation. Hidden Markov Model (HMM) is a class of hydrological models that can accommodate both overdispersion and serial dependence in historical time series, two essential hydrological properties that must be captured when modeling a system where the climate is switching between different states (e.g., dry, normal, wet). In terms of reservoir operation, Stochastic Dual Dynamic Programming (SDDP) is one of the few optimization techniques that can accomodate both system and hydrologic complexity. In SDDP, the hydrologic uncertainty is often captured by a multi-site periodic autoregressive (MPAR) model. However, MPAR models are unable to represent the long-term persistence of the streamflow process found in some regions, which may lead to suboptimal reservoir operating policies. We present an extension of the SDDP algorithm that can handle the long-term persistence and provide reservoir operating policies that explicitly capture regime shifts. To achieve this, the state-space vector now includes a climate variable whose transition is governed by a HMM. The Senegal River Basin (SRB), whose flow regime is characterized by multiyear dry/wet periods, is used as a case study.</p>

scholarly journals Trading the Economic Value of Unsatisfied Municipal Water Demand

2018 ◽  
Vol 379 ◽  
pp. 343-349
Author(s):  
Dua'a B. Telfah ◽  
Riccardo Minciardi ◽  
Giorgio Roth
Keyword(s):  
Water Resources ◽  
Water Demand ◽  
Water Resource Management ◽  
Economic Value ◽  
Optimization Techniques ◽  
Resources Allocation ◽  
Water Resources Allocation ◽  
Municipal Water ◽  
Study Results ◽  
The City

Abstract. Modelling and optimization techniques for water resources allocation are proposed to identify the economic value of the unsatisfied municipal water demand against demands emerging from other sectors. While this is always an important step in integrated water resource management perspective, it became crucial for water scarce Countries. In fact, since the competition for the resource is high, they are in crucial need to trade values which will help them in satisfying their policies and needs. In this framework, hydro-economic, social equity and environmental constraints need to be satisfied. In the present study, a hydro-economic decision model based on optimization schemes has been developed for water resources allocation, that enable the evaluation of the economic cost of a deficiency in fulfilling the municipal demand. Moreover, the model enables efficient water resources management, satisfying the demand and proposing additional water resources options. The formulated model is designed to maximize the demand satisfaction and minimize water production cost subject to system priorities, preferences and constraints. The demand priorities are defined based on the effect of demand dissatisfaction, while hydrogeological and physical characteristics of the resources are embedded as constraints in the optimization problem. The application to the City of Amman is presented. Amman is the Capital City of the Hashemite Kingdom of Jordan, a Country located in the south-eastern area of the Mediterranean, on the East Bank of the Jordan River. The main challenge for Jordan, that threat the development and prosperity of all sectors, is the extreme water scarcity. In fact, Jordan is classified as semi-arid to arid region with limited financial resources and unprecedented population growth. While the easy solution directly goes to the simple but expensive approach to cover the demand, case study results show that the proposed model plays a major role in providing directions to decision makers to orient their policies and strategies in order to achieve sustainability of scarce water resources, satisfaction of the minimum required demand as well as financial sustainability. In addition, results map out national needs and priorities that are crucial in understanding and controlling the complexity of Jordan's water sector, mainly for the city of Amman.

scholarly journals Water Demand Framework and Water Development: The Case of China

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1860 ◽  
Author(s):  
Yahua Wang ◽  
Tingting Wan ◽  
Cecilia Tortajada
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Water Demand ◽  
Water Resource Management ◽  
Socioeconomic Development ◽  
Management Strategies ◽  
Strategic Choices ◽  
Resources Management ◽  
Water Development ◽  
Development Stages

Water resources management is increasingly important for sustainable economic and social development. A coherent division of the development stages is of primary importance for selecting and implementing related water resource management strategies. Using evolving supply–demand relationships, this paper proposes a framework that considers water development stages to present a series of dynamic relationships between water demand changes and overall economic development. The framework is applied to China to advance the understanding of how demand evolves at different stages of water resources development under specific socioeconomic circumstances, and of strategic choices in general. The case of China explains how water resources management has gradually improved during distinct socioeconomic development stages. It illustrates the varieties and effectiveness of water policies made to adapt to changing demand over the course of socioeconomic development. The framework can be potentially applied to other countries or regions to identify the development stage in order to select proper water management strategies.

Nanotechnology application in water resource management

2021 ◽  
pp. 33-62
Author(s):  
Arezoo Boroomandnia ◽  
Omid Bozorg-Haddad ◽  
Jimmy Yu ◽  
Mariam Darestani
Keyword(s):  
Resource Management ◽  
Water Resources ◽  
Water Supply ◽  
Case Studies ◽  
Water Resource ◽  
Water Demand ◽  
Water Resource Management ◽  
Management Strategies ◽  
Water Supply Systems ◽  
Supply Systems

Abstract Fast-growing water demand, population growth, global climate change, and water quality deterioration all drive scientists to apply novel approaches to water resource management. Nanotechnology is one of the state-of-the-art tools in scientists’ hands which they can use to meet human water needs via reuse of water and utilizing unconventional water resources. Additionally, monitoring water supply systems using new nanomaterials provides more efficient water distribution networks. In this chapter, we consider the generic concepts of nanotechnology and its effects on water resources management strategies. A wide range of nanomaterials and nanotechnologies, including nano-adsorbents, nano-photocatalysts, and nano-membranes, are introduced to explain the role of nanotechnology in providing new water resources to meet growing demand. Also, nanomaterial application as a water alternative in industry, reducing water demand in the industrial sector, is presented. Another revolution made by nanomaterials, also discussed in this chapter, is their use in water supply systems for monitoring probable leakage and leakage reduction. Finally, we present case studies that clarify the influence of nanotechnology on water resources and their management strategies. These case studies prove the importance and inevitable application of nanotechnology to satisfy the rising water demand in the modern world, and show the necessity of nanotechnology awareness for today's water experts.

scholarly journals Models and Methods for Operations in Port Container Terminals

2012 ◽  
Vol 22 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Anita Gudelj ◽  
Maja Krčum ◽  
Elen Twrdy
Keyword(s):  
Simulation Optimization ◽  
Container Terminal ◽  
Optimization Techniques ◽  
Container Terminals ◽  
Container Port ◽  
Spatial Allocation ◽  
Simulation And Optimization ◽  
Port Facilities ◽  
Complex Process ◽  
Different Types

The management of a container terminal is a complex process that involves many decisions. Among the problems to be solved, there are the spatial allocation of containers on the terminal yard, allocation of ships to berths and cranes, scheduling priorities and operations in order to maximize performances based on some economic indicators. Since the container port facilities are very expensive, it is desirable to optimize their performance, making better management decisions. This paper wants to present the contribution of the simulation and optimization techniques with the aim of improving the cooperation between different types of equipments, increasing the productivity of the terminal and helping in minimizing costs. In particular, the Petri net is used to present berth operations, and the genetic algorithm is used for scheduling container loading/unloading operations by cranes in order to minimize the maximum time it takes to serve a given set of vessels. KEYWORDS: transportation, berth management, scheduling, simulation, optimization

scholarly journals Water Security in a Changing Environment: Concept, Challenges and Solutions

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 490
Author(s):  
Binaya Kumar Mishra ◽  
Pankaj Kumar ◽  
Chitresh Saraswat ◽  
Shamik Chakraborty ◽  
Arjun Gautam
Keyword(s):  
Water Resources ◽  
Water Resource Management ◽  
Environmental Changes ◽  
Multiple Scales ◽  
Water Security ◽  
Dissemination And Implementation ◽  
Holistic View ◽  
Water Resources Systems ◽  
Sustainable Solutions ◽  
Wide Range

Water is of vital and critical importance to ecosystems and human societies. The effects of human activities on land and water are now large and extensive. These reflect physical changes to the environment. Global change such as urbanization, population growth, socioeconomic change, evolving energy needs, and climate change have put unprecedented pressure on water resources systems. It is argued that achieving water security throughout the world is the key to sustainable development. Studies on holistic view with persistently changing dimensions is in its infancy. This study focuses on narrative review work for giving a comprehensive insight on the concept of water security, its evolution with recent environmental changes (e.g., urbanization, socioeconomic, etc.) and various implications. Finally, it presents different sustainable solutions to achieve water security. Broadly, water security evolves from ensuring reliable access of enough safe water for every person (at an affordable price where market mechanisms are involved) to lead a healthy and productive life, including that of future generations. The constraints on water availability and water quality threaten secured access to water resources for different uses. Despite recent progress in developing new strategies, practices and technologies for water resource management, their dissemination and implementation has been limited. A comprehensive sustainable approach to address water security challenges requires connecting social, economic, and environmental systems at multiple scales. This paper captures the persistently changing dimensions and new paradigms of water security providing a holistic view including a wide range of sustainable solutions to address the water challenges.

scholarly journals Local water resource management through stakeholder participation: case study, arid region, India

2021 ◽  
Author(s):  
D. Sheth ◽  
M. Iyer
Keyword(s):  
Resource Management ◽  
Water Resources ◽  
Water Resource ◽  
Arid Region ◽  
Water Resource Management ◽  
Stakeholder Participation ◽  
Management Strategies ◽  
Rapid Urbanization ◽  
Local Water Resource ◽  
The City

Abstract Access to clean water is important for socio-economic development worldwide. Bhuj, in an arid region in Gujarat State in India, has an ancient and unique water resource management system. The city's visionary king developed a catchment system of lakes so that, despite minimal rainfall and frequent droughts, sufficient water could be stored to sustain the city for around 300 years. However, over the years, with rapid urbanization and the introduction of a piped water supply, this ancient supply system was abandoned and was not maintained well. As a result, the city's water resources became polluted and defunct, which forced it to depend on distant water sources. This study shows how the city's water management strategies changed before independence (1947), and pre-earthquake (1947–2001) and post-earthquake (2001 to present). The paper mainly documents how the city's own water resources can be managed successfully by following the concepts of IUWM through effective stakeholder participation, to make the city water-secure.

scholarly journals Climate Change: An estimate of risk to Himalayan glaciers and environment

2017 ◽  
Vol 5 (01) ◽  
Author(s):  
Tanuj Shukla ◽  
Sanjay Shukla ◽  
Manish Mehta
Keyword(s):  
Water Resources ◽  
Extreme Events ◽  
Water Resource Management ◽  
Management Strategies ◽  
Variable Response ◽  
Climatic Fluctuations ◽  
North West ◽  
Temperature And Precipitation ◽  
West Himalaya ◽  
History Of

The climatic changes occurring in Himalayan areas are varied as the structures, lithology, geomorphology and evolutionary history of Himalaya. The water resources of India are dependant upon meltwater discharge which is presently the livelihood for 0.8 billion downstream peoples and significantly impacts them by its increased frequency and magnitude of extreme events. Changes in atmospheric parameters like temperature and precipitation play an important role in changing/ modifying the availability of water resources. Present study intends to highlight the changes in patterns of long-term climatic fluctuations by reanalysing the 100 years of IMD (water portal) data of atmospheric variables like temperature and precipitation with the support of extreme events that occurred in the recent past. The trends in precipitation and temperature data show the spatially variable response for Himalaya in last 100 years with decreasing pattern in all stations of Himalaya except north-west Himalaya; the weakening of Indian summer monsoon precipitation patterns also provide an evident to this fact. An attempt is done in this direction to assess and minimise the losses caused by the hazards and also use this baseline data of water resource management strategies to eradicate the threat of water availability for the billions of people.

A Framework for Improving Logistics Operations at Container Terminals

2016 ◽  
pp. 1-23
Author(s):  
Julio Mar-Ortiz ◽  
Maria D. Gracia ◽  
Rosa G. González-Ramírez
Keyword(s):  
Research Agenda ◽  
Simulation Optimization ◽  
Optimization Methods ◽  
Optimal Number ◽  
Optimization Techniques ◽  
Container Terminals ◽  
Methodological Framework ◽  
Lean Logistics ◽  
Increase Productivity ◽  
Integrated Problems

Container terminals as strategic nodes in global supply chains require improving logistics operations in order to compete. This chapter addresses the problem of how to improve logistics operations to increase the container terminal's throughput and capacity by lean logistics principles and simulation optimization methods. Current research in container terminals is focused on solving specific decision problems at container terminals, e.g., determining the optimal number of equipment to increase productivity. However, there is little evidence of studies related to designing operations to increase performance indicators, such as truck turnaround times or crane productivity, through simulation-optimization models and lean logistics principles. Consequently, the aim of this chapter is to describe a methodological framework for improving logistics operations at container terminals using lean logistics principles and simulation-optimization techniques. A research agenda to explore the applicability and usefulness of the proposed approach on a set of integrated problems is finally proposed.

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