منابع مشابه
Giardia and Cryptosporidium spp. in filtered drinking water supplies.
Giardia and Cryptosporidium levels were determined by using a combined immunofluorescence test for filtered drinking water samples collected from 66 surface water treatment plants in 14 states and 1 Canadian province. Giardia cysts were detected in 17% of the 83 filtered water effluents. Cryptosporidium oocysts, were observed in 27% of the drinking water samples. Overall, cysts or oocysts were ...
متن کاملIsotopic Characterization of River Waters and Water Source Identification in an Inland River, Central Asia
Understanding runoff generation and dynamics is the basis for water resource management, while water isotopic ratios are a potential tool for studying the mechanism on a large scale. In this paper, spatial variations of δ18O and δD of river water and their sources within a large region of the Tarim River were investigated. The results showed obvious spatial variations of both water isotope valu...
متن کامل“unconventional Supplies” and the Water Dispute among the Riparians of the Jordan River Watershed
Proposed resolutions to the Arab-Israeli water conflict that fail to consider the introduction of alternative freshwater sources in the not-too-distant future cannot be taken seriously. Each of three major forms of freshwater supply augmentation (the “unconventional supplies”) is likely to be implemented on a widespread basis in the region, thereby substantially altering the regional water bala...
متن کاملCoastal Upwelling Supplies Oxygen-Depleted Water to the Columbia River Estuary
Low dissolved oxygen (DO) is a common feature of many estuarine and shallow-water environments, and is often attributed to anthropogenic nutrient enrichment from terrestrial-fluvial pathways. However, recent events in the U.S. Pacific Northwest have highlighted that wind-forced upwelling can cause naturally occurring low DO water to move onto the continental shelf, leading to mortalities of ben...
متن کاملChemical contamination of water supplies.
Man-made organic chemicals have been found in drinking water for many years. Their numbers and varieties increase as our analytical capabilities improve. The identified chemicals comprise 10 to 20% of the total organic matter present. These are volatile or low molecular weight compounds which are easily identified. Many of them are carcinogenic or mutagenic. Chlorinated compounds have been foun...
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ژورنال
عنوان ژورنال: Public Health
سال: 1908
ISSN: 0033-3506
DOI: 10.1016/s0033-3506(08)80116-3