نتایج جستجو برای: underground water
تعداد نتایج: 562771 فیلتر نتایج به سال:
Acidity of water from abandoned underground mines decreases over time, and the rate of decrease can help formulate remediation approaches and treatment system designs. The objective of this study was to determine an overall acidity decay rate for above-drainage underground mines in northern West Virginia from a large data set of mines that were closed 50 to 70 yr ago. Water quality data were ob...
The main objectives of waters and aquatic environmental protection aim preventing the damage of all surface waters and progressive reduction of pollution, gradual cessation or elimination of evacuation and loss of pollutants in the surface waters, as preventing or eliminating the contribution of pollutants in underground waters and preventing the damage of their.Gratifying water requests, prote...
Groundwater resources as one of the most important sources of water needed for agriculture, industry and drinking is important, that are encountered With different risks such as level fall, reduced feed rate due to lack of rainfall and contaminants normal and abnormal. This study was conducted in Garmsar alluvial plain in Semnan province. According to the research purposes, process and effect o...
Saline waters from underground coal mines in Poland often contain natural radioactive isotopes, mainly 226Ra from the uranium decay series and 228Ra from the thorium series. More than 70% of the total amount of radium remains underground as radioactive deposits due to spontaneous co-precipitation or water treatment technologies, but several tens of MBq of 226Ra and even higher activity of 228Ra...
[1] Using an estimated bicarbonate concentration ([HCO3 ]) in water and discharge rates of surface water and underground water from the Houzhai Basin, southwest China, from 1986 to 2007, we estimate that the mean carbon uptake rate was 20.7 g C m yr. The surface water and underground water contribute about equally to the total carbon uptake from 1986 to 2007. About 97% of the interannual variat...
Management of underground resources has a special priority in arid and semi-arid in Iran. Increasing underground resources is one of the useful ways for providing water requirements during the drought years. The main objective of this study was for mapping underground dam in the arid and semi-arid area in western Iran. The first and important stage of underground dam construction is recogn...
The Daya Bay experiment consists of functionally identical antineutrino detectors immersed in pools of ultrapure water in three well-separated underground experimental halls near two nuclear reactor complexes. These pools serve both as shields against natural, low-energy radiation, and as water Cherenkov detectors that efficiently detect cosmic muons using arrays of photomultiplier tubes. Each ...
We investigated the existence and characteristics of ammonia oxidizers in Permian water from Midland Basin. Molecular surveys targeting the amoA gene showed that only ammonia-oxidizing archaea (AOA) exist and have potential activity in this special environment. In contrast, no ammonia-oxidizing bacteria (AOB) were detected in the water. Phylogenetic analysis indicated that 72-89% of the total s...
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