Water-Resources and Water-Use Survey
نویسندگان
چکیده
منابع مشابه
Maize response to water, salinity and nitrogen levels: yield-water relation, water-use efficiency and water uptake reduction function
Water, salinity and nitrogen are the major factors affecting maize production in arid and semi-arid areas. The objectives of this study were to investigate the effects of different water, salinity and nitrogen levels on yield-water relationships, water use, water productivity (WP), water use efficiency (WUE) and water uptake reduction function by maize hybrid SC-704 in a semi-arid area and ...
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Land use and climate change can accelerate the depletion of freshwater resources that support humans and ecosystem services on a global scale. Here, we briefly review studies from around the world, and highlight those in this special issue. We identify stages that characterize increasing interaction between land use and climate change. During the first stage, hydrologic modifications and the bu...
متن کاملGreen Electricity Products and the Sustainable Use of Water Resources
The non-sustainable use of water creates major environmental problems on a world wide scale. It is even an issue in regions with a relative abundance of this resources, like the Alps. Here, major problems are associated with the construction of dams and the operation of hydropower plants. The environmental impact of hydropower has been subjected to a fierce political debate in the eighties, esp...
متن کاملImpact of Climate Change on Water Resources in Agriculture 7 Forests , Land Use Change , and Water
A forest is a biotic community predominated by trees and woody vegetation that are signifi cantly taller, greater, thicker, and deeper than other vegetation types and generally covers a large area (Chang, 2003). Forests cover approximately 26.2% of the world, with 45.7% of Latin America and the Caribbean being covered, 35% of East Asia and the Pacifi c, and 35% of the European Union. Canada and...
متن کاملWater Resources Bulletin
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...
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ژورنال
عنوان ژورنال: Nature
سال: 1959
ISSN: 0028-0836,1476-4687
DOI: 10.1038/184096b0