نتایج جستجو برای: strong water resources

تعداد نتایج: 1137944  

2015
Charles E. Tilburg Linda M. Jordan Amy E. Carlson Stephan I. Zeeman Philip O. Yund

Faecal pollution in stormwater, wastewater and direct run-off can carry zoonotic pathogens to streams, rivers and the ocean, reduce water quality, and affect both recreational and commercial fishing areas of the coastal ocean. Typically, the closure of beaches and commercial fishing areas is governed by the testing for the presence of faecal bacteria, which requires an 18-24 h period for sample...

2001
Thomas E. Lisle Sue Hilton

During waning flood flows in gravel-bed streams, finegrained bedload sediment (sand and fine gravel) is commonly winnowed from zones of high shear stress, such as riffles, and deposited in pools, where it mantles an underlying coarse layer. As sediment load increases, more fine sediment becomes available to fill pools. The volume of fine sediment in pools can be measured by probing with a metal...

2005
Rakesh Kumar R. D. Singh K. D. Sharma

Water resources of a country constitute one of its vital assets. India receives annual precipitation of about 4000 km. The rainfall in India shows very high spatial and temporal variability and paradox of the situation is that Mousinram near Cherrapunji, which receives the highest rainfall in the world, also suffers from a shortage of water during the non-rainy season, almost every year. The to...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2006
P Jeffrey M Gearey

The recognition that water plays a central role in industrial, agricultural, economic, social and cultural development has, over the past half century, led to the development of strategic management approaches based on the concept of integrated water resources management (IWRM). This paper assesses the extent to which IWRM theory has been converted into practice and identifies existing "researc...

2013
Jian-Fei Leng Yi-Ran Ding

The aim of this paper is to research the establishment of Chinese rural drinking water market. On the basis of prior research on rural drinking water and water market, we study the market establishment and analyze trading elements, procedure and modes of Chinese rural drinking water market. Then we explore the operating mechanism of the market, such as the supply and demand mechanism, the price...

2017
Hengchun Ye Eric J Fetzer Sun Wong Bjorn H Lambrigtsen

Convective precipitation-localized, short-lived, intense, and sometimes violent-is at the root of challenges associated with observation, simulation, and prediction of precipitation. The understanding of long-term changes in convective precipitation characteristics and their role in precipitation extremes and intensity over extratropical regions are imperative to future water resource managemen...

2005
D. Bixio C. Thoeye J. De Koning D. Joksimovic D. Savic T. Wintgens T. Melin

In Europe the last two decades has witnessed growing water stress, both in terms of water scarcity and quality deterioration, which has prompted many municipalities to look for a more efficient use of water resources, including a more widespread acceptance of water reuse practices. This paper reviews European water reuse practices and sets out the map of the water reclamation technologies and r...

Journal: :Current Biology 2007
Nigel Williams

Kenya over the last few decades, and the change from a nomadic lifestyle to communally owned ranches, wildlife in the Samburu District is under threat from deforestation, land degradation, overgrazing by livestock, and unsustainable water use. Alexander Njue, who is also involved in a separate Earthwatchsponsored project studying the wildlife habitats in this area, hopes that wildlife can also ...

2013
Chiara M. Fontanazza Gabriele Freni Goffredo La Loggia Vincenza Notaro Valeria Puleo

In systems experiencing water scarcity and consequent intermittent supply, users often adopt private tanks that collect water during service periods and supply users when the service is not available. The tank may be fed by gravity or by private pumping stations depending on the network pressure level. Once water resources are collected, the tank can supply users by gravity if it is located on ...

Journal: :Journal of environmental quality 2010
Donald W Meals Steven A Dressing Thomas E Davenport

Nonpoint source (NPS) watershed projects often fail to meet expectations for water quality improvement because of lag time, the time elapsed between adoption of management changes and the detection of measurable improvement in water quality in the target water body. Even when management changes are well-designed and fully implemented, water quality monitoring efforts may not show definitive res...

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