共查询到20条相似文献，搜索用时 109 毫秒
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The Value of Ground Water Monitoring 总被引：1，自引：0，他引：1
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A. Roger Anzzolin Mary Siedlecki Jennifer Lloyd 《Ground Water Monitoring & Remediation》1999,19(2):57-59
"Valuable information pertaining to contaminant sources, contaminants, and ground water quality was derived using the state-supplied data." 相似文献
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Louise V. Parker 《Ground Water Monitoring & Remediation》1994,14(2):130-141
This paper reviews both field and laboratory studies that tested or compared the ability of various types of sampling devices to deliver representative ground water samples. Several types of grab samplers, positive displacement devices, and suction-lift devices were evaluated, Gas-lift and inertial-lift pumps were also evaluated. This study found that most of these devices can. under certain circumstances, alter the chemistry of ground water samples, das-lift pumps, older types of submersible centrifugal pumps, and suction-lift devices are not recommended when sampling for sensitive constituents such as volatile organics and inorganics, or inorganics that are subject to oxidation/precipitation reactions. In general, of the devices reviewed in this paper, bladder pumps gave the best recovery of sensitive constituents. However, better performance could be achieved for several devices if improved operational guidelines were developed by additional testing, especially at lower flow rates. Clearly, further research is warranted. Future studies should focus on pumping rate, flow control mechanisms, and dedication or decontamination of sampling devices. 相似文献
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Ralph Desmarais 《Ground Water Monitoring & Remediation》1987,7(3):69-73
Monitoring ground water quality on a statewide basis is a challenge being faced by a number of state and federal agencies involved with water quality. Many of these agencies have come forth with publications that are of some use to those who are engaged in developing monitoring networks. A review of this literature could save those involved much time and money by providing insight into what can be accomplished and/or avoided. Ultimately, each monitoring system has to be designed to meet the purposes and conditions for which it is created, no two situations ever being exactly alike. However, there are approaches and methods that can be borrowed and profitably utilized where both the problems confronted and the geology in which they are found are similar. It was the attempt to resolve these two conflicting tenets, situational uniqueness and methodological transferability, that impelled the state of Arkansas to develop the prototype approach that is to be described, along with some of the more important documents that were of use in the development of that approach.
Figure I highlights the main tenets of the prototype approach and Figure II locates each prototype within the state of Arkansas. 相似文献
Figure I highlights the main tenets of the prototype approach and Figure II locates each prototype within the state of Arkansas. 相似文献
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Although water resources managers speak of a water crisis in Africa, the management of ground water has to date not featured strongly in national and regional African water agendas. Examination of the physical environment of the continent and, in particular, the water resources in relation to the socioeconomic landscape and regional development challenges makes it clear that widely occurring, albeit largely low-yielding, ground water resources will be crucial in the achievement of water security and development. Ground water is important primarily in domestic water and sanitation services, but also for other local productive needs like community gardens, stock watering, and brick-making, all essential to secure a basic livelihood and thus to alleviate poverty. Despite the importance of small-scale farming in Africa, there is little information on the present and potential role of ground water in agriculture. In contrast to its socioeconomic and ecological importance, ground water has remained a poorly understood and managed resource. Widespread contamination of ground water resources is occurring, and the important environmental services of ground water are neglected. There appear to be critical shortcomings in the organizational framework and the building of institutional capacity for ground water. Addressing this challenge will require a much clearer understanding and articulation of ground water's role and contribution to national and regional development objectives and an integrated management framework, with top-down facilitation of local actions. 相似文献
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Dzhamalov R. G. Vlasov K. G. Myagkova K. G. Reshetnyak O. S. Safronova T. I. 《Water Resources》2019,46(1):S74-S84
Water Resources - The space–time variations in the Oka basin water chemistry have been considered. The specific features in the river water and groundwater pollution along the Oka channel and... 相似文献
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Water Resources - The density of particles in the bottom deposits of water bodies is an important characteristic, which determines the rate of interaction between bottom water layers with the... 相似文献
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本文在综合实际资料的基础上,扼要地描述了松潘地震前后地下水异常在时间和空间上的动态特征。並根据岩石力学的基本原理,对这些特征进行了初步探讨。 相似文献
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The Efficiency of Water Resources Management in Volga Basin 总被引：1，自引：0，他引：1
A. P. Demin 《Water Resources》2005,32(6):594-604
The main characteristics of the socioeconomic development of Volga basin are given. Data on the use of water resources and the development of economic branches in the basin in 1980–2002 are analyzed. The dynamics of variations in the efficiency indices of water use in industry, agriculture and municipal economy in the upper, middle, and lower Volga. 相似文献
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Lake Taihu, the third largest fresh water lake in China, with a surface area of 2 338 km2, is located in the Changjiang River Delta, the most advanced economic zone in China. During the last two decades, the rapid economic development of local agriculture and industry both in the urban and rural areas of the region has made great advances. Great quantieis of pollutants have been discharged into the lake, its nutrient content has increased continuously, and phytoplankton blooms have occurred in some areas. Water quality protection in Lake Taihu is very important because of its close relation with economical development and people''s daily life. It is urgent to have comprehensive pollution control in Lake Taihu. Based on water quality monitoring data in Lake Taihu from 1987 to 1994, the dynamic variations of water quality and eutrophication trends have been analyzed, showing obvious spatial and temporal variations. The main water quality factors were compared with the standard for drinking water and indicate considerable change with the seasons. Some basic strategies to protect water quality and prevent eutrophication are discussed. 相似文献