نتایج جستجو برای: sediment conveyance
تعداد نتایج: 37854 فیلتر نتایج به سال:
To study the changes of water and vegetation coverage, groundwater level plant diversity lakes at end Tarim River in Northwest China, various indicators more than 20 years (2000–2019) were analyzed through field investigation indoor remote sensing methods. The results showed that (1): with initiation development ecological conveyance project, areas increased significantly, especially trend beco...
BACKGROUND Achieving knowledge translation in healthcare is growing in importance but methods to capture impact of research are not well developed. We present an attempt to capture impact of a programme of research in prehospital emergency care, aiming to inform the development of EMS models of care that avoid, when appropriate, conveyance of patients to hospital for immediate care. METHODS W...
A vortex-based model of velocity and shear stress in a partially vegetated shallow channel. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] This paper presents...
Concentrated seabed deposits of polymetallic nodules, which are rich in economically valuable metals (e.g., copper, nickel, cobalt, manganese), occur over vast areas of the abyssal Pacific Ocean floor. Little is currently known about the diversity of microorganisms inhabiting abyssal habitats. In this study, sediment, nodule, and water column samples were collected from the Clarion-Clipperton Z...
Phytoremediation encompasses an array of plant-associated processes known to mitigate contaminants from soil, sediment, and water. Modification of pesticides associated with agricultural runoff includes processes directly associated with aquatic macrophytes in addition to changes in soil geochemistry and associated rhizospheric degradation. Remediation attributes of two vegetative species commo...
We found that the most suitable flooding disturbance model for regenerating Populus euphratica forest was two to three times per year with a duration of 15-20 days and an intensity of 25-30 m(3)/s. The flooding should take place during the seed emergence to young tree growth stages, and should be based on flooding experiments and data from vegetation quadrats and ecological water conveyance. Fu...
One widely accepted theory on media use is media richness theory. However, media richness theory was developed without consideration of new electronic media and the many social factors that can influence media selection, communication processes, and outcomes. Recent empirical investigations have raised questions about media richness theory's applicability to these new media. Therefore, this pap...
Both the economics and the engineering of irrigation design are typically based on the assumption of a single source. The more general economic problem is to determine which sources should be developed and how water should be allocated and delivered to various receptor-farmers. This is a problem in network economics. We begin our exploration with the problem of allocating irrigation water from ...
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