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... Attempts to establish a regional water convention covering shared water resources in the Arab world have been ongoing for more than a decade. During this time, a Draft Arab Water Convention has been proposed, and the content of this has been subject to a debate that did not gain much attention at the international level. This article seeks to examine this topic to determine whether such an instrum ...
waterresources, etc ; collective action; journals; resource management; solutions; wills; Show all 6 Subjects
Abstract:
... We summarize the key contributions to a special issue on water justice. We contend that there is no inevitable arc of history that bends towards justice. Water justice will only be achieved by the collective actions of individuals, institutions and communities working together with a commitment to common goals and the means to effect change. We urge all who ponder on the issues of water justice, a ...
... The time step of an explicit time integration scheme for solving time-dependent hyperbolic partial differential equations in a finite volume method (FVM) framework is restricted by the Courant–Friedrichs–Lewy (CFL) criterion. Conventional time stepping integrates all grid cells with the same time step. This causes unnecessary computational costs when wave speeds and/or grid spacing vary considerab ...
Johan Enqvist; Gina Ziervogel; Luke Metelerkamp; John van Breda; Ntombikayise Dondi; Thabo Lusithi; Apiwe Mdunyelwa; Zinzi Mgwigwi; Mpumelelo Mhlalisi; Siya Myeza; Gciniwe Nomela; Ann October; Welekazi Rangana; Maggie Yalabi
waterresources, etc ; journals; low-income neighborhoods; low-income population; pipes; resource management; sanitation; social problems; towns; Show all 9 Subjects
Abstract:
... Cape Town’s water injustices are entrenched by the mismatch between government interventions and the lived realities in many informal settlements and other low-income areas. This transdisciplinary study draws on over 300 stories from such communities, showing overwhelming frustration with the municipality’s inability to address leaking pipes, faulty bills and poor sanitation. Cape Town’s intervent ...
waterresources, etc ; Zea mays; aboveground biomass; arid zones; corn; evapotranspiration; fertilizers; grain yield; irrigation scheduling; microirrigation; nitrogen; nutrient use efficiency; temperature; China; Show all 14 Subjects
Abstract:
... Drip irrigation combined with film mulching significantly improved water saving and agricultural efficiency in arid and semi-arid regions. However, the impact of various irrigation technical parameters under plastic film-mulched (PM) drip irrigation on water consumption and maize yield (Zea mays L.) for seed production is still unclear. Field experiments were conducted between 2016 and 2018 in Nor ...
waterresources, etc ; laboratory experimentation; solids; theoretical models; topography; Show all 5 Subjects
Abstract:
... The first, theoretical part of the study presents a mathematical formulation of the problem of background flow over a two-stage elevation and the derivation of a criterion of bifurcation of a topographic vortex generated by this elevation. The spectral problem of the search for bifurcation points is solved numerically by the inverse iteration method. The second part presents the results of laborat ...
Inga Berre; Wietse M. Boon; Bernd Flemisch; Alessio Fumagalli; Dennis Gläser; Eirik Keilegavlen; Anna Scotti; Ivar Stefansson; Alexandru Tatomir; Konstantin Brenner; Samuel Burbulla; Philippe Devloo; Omar Duran; Marco Favino; Julian Hennicker; I-Hsien Lee; Konstantin Lipnikov; Roland Masson; Klaus Mosthaf; Maria Giuseppina Chiara Nestola; Chuen-Fa Ni; Kirill Nikitin; Philipp Schädle; Daniil Svyatskiy; Ruslan Yanbarisov; Patrick Zulian
waterresources, etc ; design; mathematical models; porous media; tissues; Show all 5 Subjects
Abstract:
... Flow in fractured porous media occurs in the earth’s subsurface, in biological tissues, and in man-made materials. Fractures have a dominating influence on flow processes, and the last decade has seen an extensive development of models and numerical methods that explicitly account for their presence. To support these developments, four benchmark cases for single-phase flow in three-dimensional fra ...
... Surveys were performed to prove the probability of using the scaling techniques in modeling the key hydro-mechanical characteristics based on the granulometric structure of soils and the subsequent optimization processes for amelioration. The spatial soil heterogeneity significantly complicates modeling the moisture transfer, which depends on the hydrophysical moisture-transport properties in medi ...
waterresources, etc ; chemical reactions; methodology; models; porosity; rocks; walking; Show all 7 Subjects
Abstract:
... Random walk methods are particularly well suited for modeling (anomalous) transport processes in complex systems, from heterogeneous porous domains to fractured rocks. Taking full advantage of their multi-scale attributes, these methods can be integrated into multi-scale modeling strategies where they are used for (i) performing small-scale simulations with a high level of description of the heter ...
waterresources, etc ; correlation; energy; measurement; models; recycling; spatial variation; water; China; Show all 9 Subjects
Abstract:
... Herein, we investigated the relationship between water, food, and energy (W–E–F) in different regions of China to provide suggestions for sustainable and stable regional development of these resources. Based on the system theory, we constructed three relevant subsystems and analyzed the action mechanism between them. Furthermore, we constructed a network based on the super-efficiency data envelopm ...
waterresources, etc ; center pivot irrigation; extracts; image analysis; monitoring; neural networks; remote sensing; Brazil; Show all 8 Subjects
Abstract:
... Irrigation is indispensable in agriculture. Center pivot irrigation systems are popular means of irrigation since they are water-efficient and labor-saving. Monitoring center pivot irrigation systems provides important information for the understanding of agricultural production, water resources consumption and environmental change. Deep learning has become an effective approach for object detecti ...
waterresources, etc ; chemical elements; cities; environment; face; humans; hybrids; industry; paper; pollution; population; technology; China; Show all 13 Subjects
Abstract:
... Cities are faced with booming populations, limited resources, and intensified pollution. To remain its sustainability and resilience against the varying environment, a city has to tackle the challenges from both the nature and human ourselves. This paper aims at evaluating the sustainability and resilience of cities in terms of their capabilities for maintaining, in face of potential threats in th ...
... The short lifetimes of multibranch delta systems are proved based on the theory of dynamic stability of delta branches and causes of its violation. Typical cases of such brevity and natural causes of the decay of some branches and the activation of others are considered. Examples of such processes in different deltas are given. ...
... The efficiency of several first-order numerical schemes for two-layer shallow water equations (SWE) are evaluated here by considering different eigenvalue solutions. This study is a continuation of our previous work (Krvavica et al., 2018) in which we have proposed an efficient implementation of a Roe solver for two-layer SWE based on analytical expressions for eigenvalues and eigenvectors. In thi ...
waterresources, etc ; case studies; dry climates; ecosystems; functional properties; hydrologic cycle; models; oases; trophic relationships; China; Show all 10 Subjects
Abstract:
... The sustainable use of increasingly strained water resources is a critical challenge for oases with dry climates, fragile ecosystems, and developing economies. Knowledge of how best to manage these resources should be pursued from a holistic perspective considering the multidimensionality of human-nature water cycles. Thus, we built an integrated evaluation framework of oasis water metabolism (OWM ...
waterresources, etc ; case studies; chlorides; cost benefit analysis; objectives; paper; subsidies; sustainable development; water; water conservation; Show all 10 Subjects
Abstract:
... Sustainable water management is key to achieving sustainable development goals. Increasing water consumption prompts industrial plants to implement water conservation projects (WCPs) and improve the utilization efficiency of water resources. In this paper, we develop an integrated graphical method for the implementation of water conservation projects by considering both water-saving targets and in ...
waterresources, etc ; brackish water; desalination; reverse osmosis; specific energy; wages and remuneration; water flow; South Korea; Show all 8 Subjects
Abstract:
... Based on the operational data from the Korea Water Resources Corporation (K-water), this study aimed to reduce the operation and maintenance (O&M) costs for 20 brackish water desalination plants in the island regions of South Korea. In addition, brackish water reverse osmosis (BWRO) and low-pressure reverse osmosis (LPRO) membranes were compared and evaluated in terms of reduction in specific ener ...
Anamika Barua; Rozemarijn ter Horst; Jenniver Sehring; Christian Bréthaut; Lena Salamé; Aaron Wolf; Barbara Janusz Pawletta; Emmanuel Manzungu; Alan Nicol
waterresources, etc ; attitudes and opinions; experts; fields; journals; research institutions; resource management; universities; water utilities; Switzerland; Show all 10 Subjects
Abstract:
... Water cooperation and diplomacy processes often rely on the tools and capacities that academic and research institutions can offer. However, groups of scientific experts in the field of water cooperation and diplomacy are often small and relatively discrete, suggesting that greater sharing of knowledge and interconnection of expertise could generate further impetus for development of this importan ...
... To tackle fundamental scientific questions regarding health, resilience and sustainability of water resources which encompass multiple disciplines, researchers need to be able to easily access diverse data sources and to also effectively incorporate these data into heterogeneous models. To address these cyberinfrastructure challenges, a new sustainable and easy-to-use Open Data and Open Modeling f ...
... Continuous-time random walk (CTRW) models of non-Fickian solute transport are defined by a temporal pdf and three parameters: a velocity-like constant, a dispersion-like constant and a “time constant”. Presently, to identify a model, all are jointly calibrated against solute breakthrough data. We show that without loss of generality the time constant can be set to unity and velocity-like and dispe ...