نتایج جستجو برای: scarcity of sources

تعداد نتایج: 21176033  

Journal: :Eos, Transactions American Geophysical Union 2009

Journal: :Environmental Research Letters 2022

Abstract The increasing water use for human activities is threatening the health of ecosystems. Most previous studies on scarcity mainly centered society. In this study, we developed a new indicator, ecological (WS eco ), that considers quantity, quality, and environmental flow requirements. WS was assessed at provincial level in China. results show northern China suffered more severe than sout...

2013
Simon N. Gosling Nigel W. Arnell

This paper presents a global scale assessment of the impact of climate change on water scarcity. Patterns of climate change from 21 Global Climate Models (GCMs) under four SRES scenarios are applied to a global hydrological model to estimate water resources across 1339 watersheds. The Water Crowding Index (WCI) and the Water Stress Index (WSI) are used to calculate exposure to increases and dec...

Journal: :Environmental science & technology 2014
Kuishuang Feng Klaus Hubacek Stephan Pfister Yang Yu Laixiang Sun

Water footprints and virtual water flows have been promoted as important indicators to characterize human-induced water consumption. However, environmental impacts associated with water consumption are largely neglected in these analyses. Incorporating water scarcity into water consumption allows better understanding of what is causing water scarcity and which regions are suffering from it. In ...

2002
DAN MAHONEY

Acentral theme of all schools of economics is the notion that goods are scarce. The extent of human wants and needs is sufficiently great that the means man would apply to those ends are limited, requiring that he choose among alternative actions. The purpose of this article is to call attention to a facet of scarcity that stems from this fundamental notion and that is of relevance to economic ...

Journal: :Environmental management 2010
Pierre Mukheibir

This article investigates the approaches of the various discourses operating in the water sector and how they address the issues of scarcity and equitable access under projected climate change impacts. Little synergy exists between the different approaches dealing with these issues. Whilst being a sustainable development and water resources management issue, a holistic view of access, scarcity ...

Journal: :CoRR 2016
Omar Gustavo Zabaleta Juan Pablo Barrangú Constancio M. Arizmendi

Recent spectrum-sharing research has produced a strategy to address spectrum scarcity problems. This novel idea, named cognitive radio, considers that secondary users can opportunistically exploit spectrum holes left temporarily unused by primary users. This presents a competitive scenario among cognitive users, making it suitable for game theory treatment. In this work, we show that the spectr...

Journal: :The Journal of Environment & Development 2022

Water scarcity in Narok county, Kenya may be attributed to demographic pressures, land-use changes, environmental degradation and the effects of climate change. This article combines methodologies from history political science investigate how local communities cope with water scarcity. In so doing, we consider institutions, both indigenous modern, mitigate conflict over access control sources....

2015
Michael Lynn

According to psychological research, scarcity increases an object's desirability. Although inconsistent with the assumptions of formal economic theory, this effect of scarcity may be attributable to people's naive (or informal) economic theories. More specifically, scarcity's enhancement of desirability may be mediated by the belief that scarce things are more expensive than available ones. Exi...

Journal: :Journal of Nutrition & Food Sciences 2016

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