نتایج جستجو برای: surface water quality

تعداد نتایج: 1798552  

2002
Colin Neal Paul Shand

A survey of surface, spring and borehole waters associated with the ophiolite rocks of Cyprus shows five broad water types (1) Mg-HCO3, (2) Na-SO4-Cl-HCO3, (3) Na-Ca-Cl-SO4-OH-CO3, (4) Na-Cl-SO4 and (5) Ca-SO4. The waters represent a progression in chemical reactivity from surface waters that evolve within a groundwater setting due to hydrolysis of the basic/ultrabasic rock as modified by CO2-w...

2004
Neil McIntyre

Water quality Risk Analysis Tool (WaterRAT) is recently developed software for supporting surface water quality management. The software contains a library of river and lake quality models, aiming to give flexibility over specification of model scope, complexity and scale. Various sources of uncertainty can be included in the analysis, including uncertainty in boundary conditions, initial condi...

2014
P. Simeonova P. Papazova V. Lovchinov

Two multivariate statistical methods (Cluster analysis /CA/ and Principal components analysis /PCA/) were applied for model assessment of the water quality of Maritsa River and Tundja River on Bulgarian territory. The study used long-term monitoring data from many sampling sites characterized by various surface water quality indicators. The application of CA to the indicators results in formati...

2014
Sara Moore Brajesh Kumar Dubey

Surface coal mining has become the ideal method for extracting coal from the Appalachia Mountains. However, surface coal mining generates large amounts of waste which may decrease the water quality in central Appalachia. This research is an attempt to determine whether surface coal mining negatively impacts water quality. This research consists of a literature review in addition to an analysis ...

Journal: :Journal of water and health 2014
H de Man E J T M Leenen F van Knapen A M de Roda Husman

Splash parks have been associated with infectious disease outbreaks as a result of exposure to poor water quality. To be able to protect public health, risk factors were identified that determine poor water quality. Samples were taken at seven splash parks where operators were willing to participate in the study. Higher concentrations of Escherichia coli were measured in water of splash parks f...

Journal: :اکو هیدرولوژی 0
یونس نوراللهی دانشکدة علوم و فنون نوین دانشگاه تهران حسین یوسفی دانشکدة علوم و فنون نوین دانشگاه تهران سعیده صادقی دانشکدة علوم و فنون نوین دانشگاه تهران سعید محمد زاده بینا دانشکدة انرژی و محیط زیست، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران سارا صادقی دانشکدة علوم و فنون دریایی، دانشگاه آزاد اسلامی واحد تهران شمال

in this paper, the results of surface and ground water quality monitoring during drilling of three deep exploratory wells in geothermal project in north west of sabalan in meshkinshahr are analyzed. the region has been investigated by various researchers to generate electricity using geothermal energy. drilling in deep geothermal projects, a variety of materials such as cement, bentonite, barit...

ژورنال: Hormozgan Medical Journal 2006
Alipour, V. , Dindarloo, K. , Farshidfar, GH.R. ,

Introduction: Natural water normally consists of mineral compounds, suspended solids and dissolved gases. Some of these components are necessary for human health, but if more than allowable limits, they will endanger the human health. In this research, important clinical parameters in drinking water of Bandar Abbas were evaluated to compare with the national standards. Methods: In this descrip...

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 ...

Journal: :آب و خاک 0
معصومه صالحی محمد کافی علیرضا کیانی

abstract in order to optimize the water management in agriculture in semi arid and arid conditions water-salinity function should be evaluated. in order to evaluate salinity and deficit irrigation two experiments were conducted in 2008 and 2009. kochia was grown with six levels of saline water (1.5, 7, 14, 21, 28, and 35 ds/m) and three levels of applied water (25, 75, and 125 percent of the wa...

2001

The U.S. Geological Survey (USGS) began an extensive groundand surfacewater quality study in July 1989 to define the baseline water quality within a southeastern Florida drainage district and to develop a data base for future waterresource planning and management. Results were published in a USGS report (Litzetz 1996), comparing groundand surface-water quality data (1989-94) to the Florida Depa...

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