نتایج جستجو برای: water supply networks

تعداد نتایج: 1102651  

Water requirements in many large water supply systems are provided by mixing water withdrawal from surface and underground resources with different quantity and quality.Water supply from underground sources requires energy consumption and surface water resources are limited and unstable.The aim of this research is managing optimal supply of required water of system with minimum energy cost and ...

2014
JIA WANG JIAOJU GE QIANG LU

An essential challenge for many developing countries is improvement of water supply system to ensure urban water supply safety and reliability. Penalty, subsidy and water price increase are often considered as the main incentive measures for improving urban water supply system. However, the implementation of these policies is confronting some uncertainties because of the conflicts of involved a...

2008
Ge Sun Steven G. McNulty Jennifer A. Moore Erika C. Cohen

Assessment of long-term impacts of projected changes in climate, population, and land use and land cover on regional water resource is critical to the sustainable development of the southeastern United States. The objective of this study was to fully budget annual water availability for water supply (precipitation ) evapotranspiration + groundwater supply + return flow) and demand from commerci...

Journal: :Environmental Modelling and Software 2013
Evangelos Rozos Christos Makropoulos

The continuous expansion of urban areas is associated with increased water demand, both for domestic and non-domestic uses. To cover this additional demand, centralised infrastructure, such as water supply and distribution networks tend to become more and more complicated and are eventually over-extended with adverse effects on their reliability. To address this, there exist two main strategies...

2017
Megan French Natalie Alem Stephen J Edwards Efraín Blanco Coariti Helga Cauthin Karen A Hudson-Edwards Karen Luyckx Jorge Quintanilla Oscar Sánchez Miranda

Assessing water sources for drinking and irrigation along with community vulnerability, especially in developing and rural regions, is important for reducing risk posed by poor water quality and limited water availability and accessibility. We present a case study of rural mining-agricultural communities in the Lake Poopó Basin, one of the poorest regions on the Bolivian Altiplano. Here, relati...

Aliasghar Montazar Mahmoud Mashaal Mina Sadat Seyedjavad

Measuring sensitivity of hydraulic structures is considered as an approach for evaluation of water projects performance, due to lower distribution efficiency in Irrigation and Drainage project schemes. Sensitivity analysis approach for irrigation structures is one of flow analysis methods which are developed in recent years in order to measure the behavior of flow in hydraulic structures in an ...

Journal: :پژوهش آب در کشاورزی 0
پوریا عطائی دانشجوی دکتری ترویج کشاورزی دانشگاه تربیت مدرس. نسیم ایزدی دانشجوی دکتری ترویج و آموزش کشاورزی دانشگاه بوعلی سینا.

irrigation management transfer to farmers is one of the important and necessary issues for irrigation planners globally. irrigation management transfer or participatory irrigation management by water users’ associations (wua) is a widespread strategy in the world and a good way to remove the country's irrigation and drainage systems problems. the main objective of this research was respons...

Journal: :Journal of environmental sciences 2002
Shao Liu

The role of water pricing for managing water resources is widely recognized in many areas of the world because of the increasing scarcity of water resources, a high competition between water uses and environmental degradation. Based on the analysis of cost of water, this paper explores which types of cost should be reflected in the water pricing enhancing the sustainability of water resources. ...

Performance and control are two important components in any executive activity and their purposes are to correct and improve the functions and reduce wasting resources for better productivity and adoption of appropriate techniques that ultimately lead to the development of programs. Therefore, the present study aimed to simulate underground water flow and investigate the effects of artificial ...

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