نتایج جستجو برای: strong water resources

تعداد نتایج: 1137944  

2016
Ke Chen Shengtian Yang Changsen Zhao Zongli Li Ya Luo Zhiwei Wang Xiaolin Liu Yabing Guan Juan Bai Qiuwen Zhou Xinyi Yu Athanasios Loukas

Vegetation deterioration and soil loss are the main causes of more precipitation leakages and surface water shortages in degraded karst areas. In order to improve the utilization of water resources in such regions, water storage engineering has been considered; however, site selection and cost associated with the special karstic geological structure have made this difficult. According to the pr...

2016
Stephan T. Leu C. Michael Bull Christine Cooper

Pastoralism is a major agricultural activity in drier environments, and can directly and indirectly impact native species in those areas. We investigated how the supply of an artificial watering point to support grazing livestock affected movement and activity patterns of the Australian sleepy lizard (Tiliqua rugosa) during a drought year. We observed 23 adult lizards; six had access to a dam, ...

2005
H Malano

Water allocation models, sometimes referred to as water availability models, are critical tools for effective water resources management. Effective water allocation models allow policy-makers and managers to gain insight into the potential consequences of system changes, be they regulatory changes, infrastructure changes, climatic or other physical changes. Water allocation models are also used...

Journal: :Journal of Contemporary Water Research & Education 2014

2012
Flavio Trojan Danielle Costa Morais

Difficulties related to the group decision-making process in the water supply sector, such as physical and economic losses, irrational use of water and maintenance costs, highlight the need to develop procedures to support decisions, reducing unnecessary water use and wastage. This study focused on the rational use of water resources and reduction of water losses, based on the assumption that i...

2014
Tohid Erfani Olga Binions Julien J Harou

This paper presents an optimization model to simulate short-term pair-wise spot-market trading of surface water abstraction licenses (water rights). The approach uses a node-arc multicommodity formulation that tracks individual supplier-receiver transactions in a water resource network. This enables accounting for transaction costs between individual buyer-seller pairs and abstractor-specific r...

Journal: :Journal of environmental management 2006
Nick Hanley Robert E Wright Begona Alvarez-Farizo

The Water Framework Directive is a major regulatory reform of water resources management within the European Union. Integrated catchment management plans must be prepared for all river basins, in order to achieve 'good ecological status' in all EU waters. Ecological status is a broader measure of water quality than the chemical and biological measures that were previously dominant. The Directiv...

Journal: :Journal of environmental management 2008
Antonio A R Ioris Colin Hunter Susan Walker

This paper reports the formulation and application of a framework of catchment-level water resource management indicators designed to integrate environmental, economic and social aspects of sustainability. The framework of nine indicators was applied to the River Dee and River Sinos catchments in Scotland and Brazil, respectively, following an indicator selection process that involved inputs fr...

Journal: :Ground water 2006
Christopher S Lowry Mary P Anderson

Owing to increased demands on ground water accompanied by increased drawdowns, technologies that use recharge options, such as aquifer storage recovery (ASR), are being used to optimize available water resources and reduce adverse effects of pumping. In this paper, three representative ground water flow models were created to assess the impact of hydrogeologic and operational parameters/factors...

Journal: :Water research 2012
Guo-dong Kang Yi-ming Cao

With the rapidly increasing demands on water resources, fresh water shortage has become an important issue affecting the economic and social development in many countries. As one of the main technologies for producing fresh water from saline water and other wastewater sources, reverse osmosis (RO) has been widely used so far. However, a major challenge facing widespread application of RO techno...

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