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Littérature scientifique sur le sujet « Water quality statu »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Water quality statu"

Vishnoi, Unnati, Jagjeet Kaur et S. K. Pathak. « Water quality of River Ganga in respect of physico-chemical characteristics at Shyampur, District Haridwar ». Environment Conservation Journal 8, n^o 3 (24 décembre 2007) : 23–26. http://dx.doi.org/10.36953/ecj.2007.080307.

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The water qu ali ty statu s of River Gan ga at Sh yampur was stu di ed with re spec t to physi co–c he mi cal characteristics. Parameters studied were pH, total solids, total dissolved solid, T.S.S., conductivity, alkalinity, hardness, D.O., B.O.D. and C.O.D. The nature of water quality of Ganga with respect to pH is alkaline.

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Shukla, Dr Suresh, et Prof Dr M. A. Singaracharya. « Assessment of Water Quality Status of Godavari river around process industries at Manuguru, Telangana State ». International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (30 avril 2018) : 159–65. http://dx.doi.org/10.31142/ijtsrd10880.

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Prof. A.B. More, Prof A. B. More, Prof C. S. Chavan Prof. C.S. Chavan, Ajoy Gurung, Pramod Sarwade, Shashikant Chaudhari et Rohit Vyas. « Water Quality Status of Mula-Mutha River ». Global Journal For Research Analysis 3, n^o 4 (15 juin 2012) : 75–77. http://dx.doi.org/10.15373/22778160/apr2014/24.

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Tamayo, Paul Angelo A. « Water Safety in Schools : Assessment on Water Quality of Water Pipe System at Isabela State University Cauayan City, Isabela, Philippines ». Journal of Advanced Research in Dynamical and Control Systems 12, SP8 (30 juillet 2020) : 789–94. http://dx.doi.org/10.5373/jardcs/v12sp8/20202582.

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Olubanjo, O. O., et E. B. Adeleke. « Assessment of Physico-chemical Properties and Water Quality of River Osse, Kogi State ». Applied Research Journal of Environmental Engineering 3, n^o 1 (30 avril 2020) : 21–30. http://dx.doi.org/10.47721/arjee20200301030.

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Water is the basis of life and means must be put in place to check its quality for domestic purposes. The river Osse is one of the rivers located in Kabba, Kogi state, and it serves various purposes for the residents of its community. Water samples were collected from 3 stations of Osse river namely; Okoro, Odolu and ABU. These samples were accessed to determine if the water is suitable for domestic purposes. The results of the analyses of the water samples showed that the river had relatively good quality as the dissolved oxygen (DO2) was within the international and local standards i.e. world health organization (WHO) and Nigeria industrial standards (NIS) respectively. The highest value recorded was 0.60 mg/l at station 1 in August and the lowest value was 0.18 mg/l at the same station in May. The highest mean value for the Nitrate concentration of the river was 36.47 mg/l at station 3 and the lowest was 26.12 mg/l at station 2 and this still falls within the standards laid down. TDS, chloride, alkalinity were in the range of 29-70 mg/l, 3.15-30 mg/l and 16-20 m /l respectively and none was above the limit set down by WHO and NIS. The pH level of all the stations throughout the study ranged from 7.4-7.9 meaning they were also within standards. The BOD highest value was 3 and was also within the tolerance range for pure water. The result shows that the River Osse was within the WHO international standard and not above the standards of the local set limits by NIS. Thus, making the river fit and good for domestic purposes. Keywords: Water quality, Physico-chemical property, River Osse, Biological Oxygen Demand, Dissolved Oxygen.

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Goncharuk, V. V. « State-of-the-Art Technologies and Equipment for Obtaining High-Quality Drinking Water ». Science and innovation 11, n^o 1 (30 janvier 2015) : 80–84. http://dx.doi.org/10.15407/scine11.01.080.

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Osuch, Andrzej, Piotr Rybacki, Ewa Osuch, Mariusz Adamski Mariusz Adamski, Tatiana Buchwald et Żaneta Staszak. « ASSESSMENT OF WATER QUALITY OF LAKE ŁOMNO ». Inżynieria Ekologiczna, n^o 46 (2016) : 24–30. http://dx.doi.org/10.12912/23920629/61446.

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Zhartybaeva, Meruert, Symbat Tulegenova, Nurlan Muntaev et Zhanar Oralbekova. « Water quality of aquatic ecosystems of Akmola region ». Bulletin of the Karaganda University. “Biology, medicine, geography Series” 108, n^o 4 (30 décembre 2022) : 34–48. http://dx.doi.org/10.31489/2022bmg4/34-38.

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Currently, the issue of protecting natural resources from polluting and preventing pollution requires worldwide attention. In general, water resources are becoming an invaluable resource that explains the sustainable development of any state. Rational use and protection of water sources is becoming one of the most pressing issues in our country. Pollution of water sources, in turn, affects the deterioration of water quality, living organisms that live in water sources (algae, fish, etc.), and the health of consumers. Since water is the most important resource in the world, it is a task to protect and prevent environmental risk. Therefore, to monitor the aquatic ecosystems of Akmola region, the research team conducted research in laboratory conditions, taking water samples from water bodies (Nura, Ishim Riversand Taldykol, Maybalyk, and Zhaltyrkol Lakes) from a practical trip organized by the research group. Research studies on water samples taken from water bodies showed that the water was polluted, and in some indicators the maximum rural concentration was exceeded. It is clear that pollutants affect water biota, although in most cases they are not the cause. According to water samples, the level of pollution of water sources was assessed. Protection of Water Resources in general from pollutants is one of the strategic tasks of the country.

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Díaz-Casallas, Daissy Milena, Mario Fernando Castro-Fernández, Elvira Bocos, Carlos Enrique Montenegro-Marin et Rubén González Crespo. « 2008–2017 Bogota River Water Quality Assessment based on the Water Quality Index ». Sustainability 11, n^o 6 (19 mars 2019) : 1668. http://dx.doi.org/10.3390/su11061668.

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This article provides a deep analysis of the water quality at the upper basin of the Bogota River (Colombia) between 2008 and 2017. The Water Quality Index has been the indicator employed to determine the ecological status of the river. This index was chosen in order to normalize the analysis, given that it is commonly used by the Institute of Hydrology, Meteorology and Environmental Studies, a government agency of the Ministry of Environment and Sustainable Development of Colombia, to determine the state of surface effluents. The results obtained were organized in a double-entry matrix in order to relate the variables of the sample period and the sampling station. The research revealed an insufficient quality of water, demonstrating that the high stretch of the Bogota River basin has, in general, regular or acceptable water quality, while only five stations showed an acceptable status. Surprisingly, the stations located close to the wastewater treatment plants of the municipalities of Choconta, Suesca, Gachancipa, and Tocancipa, as well as Rio Negro, have a poor water quality, discharging a high load of contaminants into the river. Although great efforts have been made by Colombian authorities to restore the critical state of the majority of their aquatic ecosystems, recent implementation of policies and instruments have not shown significant achievements yet. For this reason, this study aims to present a powerful decision-tool for the monitoring and evaluation of correction measures implemented on this river basin. The data used in this research were provided by the Regional Autonomous Corporation of Cundinamarca.

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M. M Vaishnav, M. M. Vaishnav, et Milan Hait. « Ground Water Quality Status of Northern and Eastern Zone of Bilaspur Urban Areas, Bilaspur Distt., C.G. (India) ». Indian Journal of Applied Research 3, n^o 11 (1 octobre 2011) : 49–53. http://dx.doi.org/10.15373/2249555x/nov2013/15.

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Thèses sur le sujet "Water quality statu"

KIES, FATIMA. « Contribution to the study of the ecological status of the West Algerian coastal waters within the Water Framework Directive (WFD) ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2018. http://hdl.handle.net/10281/207337.

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Le aree costiere sono sottoposte a pressioni antropogeniche e ai cambiamenti climatici. Negli ultimi venti anni, il concetto di gestione integrata della zona costiera ben presente nelle diverse azioni politiche, manca degli strumenti a supporto degli sforzi di pianificazione e gestione, specialmente nelle aree di estuario dove gli effetti dei bacini fluviali sulle zone costiere sono poco evidenziati nella maggior parte delle implementazioni. Gli ambienti costieri costituiscono un ambiente dinamico influenzato da input continentali sia naturali che antropogenici e controllato da fattori idrodinamici e climatici. Alcune zone costiere sono, con la loro geografia e geomorfologia, un recettore in cui sono presenti corpi idrici carichi di minerali esogeni e / o di materia organica derivanti dall'attività antropica. Il tempo di permanenza di questi corpi idrici è legato all'intensità delle correnti marine che controlla la distribuzione e la diluizione delle sostanze disciolte che possono influenzare l'ecosistema. Al fine di valutare lo stato trofico delle acque marine costiere del Mediterraneo, la Direttiva Quadro sulle Acque (DQA) richiedeva il monitoraggio della concentrazione di Clorofilla-a (Simboura et al., 2005) e l'indice trofico TRIX proposto da Vollenweider et al. (1998), che tiene conto delle sostanze nutritive complessive, della clorofilla e dell'ossigeno disciolto nell'ambiente. I nostri risultati hanno fornito la classificazione dello stato di qualità ecologica (EQS) dei tre siti Sonactere, Cheliff e Sokhra rispettivamente come stato Scadente, in base alla concentrazione di clorofilla, e come Cattivo, secondo l'indice trofico (TRIX). Le acque costiere di Mostaganem nell'Algeria occidentale mostrano una situazione di grave eutrofizzazione. Tuttavia, per capire meglio lo stato dell'ecosistema, è essenziale esplorare l'intera area costiera di Mostaganem per un lungo periodo. Gli indici Chl-a e TRIX sono stati sviluppati per le regioni del Mediterraneo, ma dovrebbero essere adattati alle condizioni locali in modo che siano pertinenti e più affidabili e rappresentativi, dato l'aspetto eterogeneo delle zone costiere del Mediterraneo.
Coastal areas are under anthropogenic and climate change pressures. During the last twenty years, the concept of Integrated Coastal Zone Management, as provides the overall policy frames, but tools supporting the planning and management efforts are almost lacking, especially in the estuary areas where the effects of river basins on coastal zones are nearly absent in most implementations. Coastal environments constitute a dynamic environment influenced by both natural and anthropogenic continental inputs and controlled by hydrodynamic and climatic factors. Some coastal zones are, by their geography and geomorphology, a receptor where are trapped water bodies loaded with exogenous mineral and /or organic matter resulting from the anthropic activity. The residence time of these water bodies is related to the sea currents intensity which controls the distribution and dilution of dissolved substances that can unbalance the ecosystem. In order to assess the trophic status of coastal Mediterranean marine waters, the Water Framework Directive (WFD) required the monitoring of the Chlorophyll-a concentration (Simboura et al., 2005) and the trophic index TRIX proposed by Vollenweider et al. (1998), which takes into account the overall nutrients, chlorophyll-a, and dissolved oxygen in the environment. Our results highlighted the ranking of the ecological quality status (EQS) of the three sites Sonactere, Cheliff, and Sokhra as bad according to the Chlorophyll concentration and as Poor status according to trophic index (TRIX). The coastal waters of Mostaganem in western Algeria have proved to be in a situation of severe eutrophication. However, to better understand the state of the ecosystem, it is essential to explore the entire coastal area of Mostaganem over a long period. The Chl-a and TRIX index were developed for Mediterranean regions but it should be adapted to local conditions so that it is relevant and more reliable and representative, given the heterogeneous aspect of the Mediterranean coastal zones.

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Hamza, Sarah. « State of water quality management in Egypt ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0008/MQ42329.pdf.

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Vaschenko, Nataliya. « Quality and ecological state of ground water ». Thesis, Видавництво СумДУ, 2005. http://essuir.sumdu.edu.ua/handle/123456789/13585.

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Frederick, Brent Ray. « Magnesium supplementation through drinking water to improve pork quality ». NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-05162003-134628/.

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Four experiments were conducted to investigate the effect of short term magnesium supplementation through drinking water prior to harvest on pork quality of pigs. Two days of magnesium supplementation (experiment 1) appeared optimal to improved pork quality. Older, slower growing pigs produced higher pork quality than younger faster growing pigs; however, magnesium supplementation had no effect (experiment 2). The presence of the Halothane and to a greater extent the Rendement Napole mutation reduced the quality of pork (experiment 3). Furthermore, pigs with both mutations had poorer pork quality than pigs with one mutation. Magnesium supplementation reduced pork quality when supplemented to pigs with the Halothane mutation. Pork quality was not affected when dose of magnesium supplemented in the water was altered (experiment 4). Although plasma magnesium was increased by magnesium supplementation, muscle magnesium was not affected. Overall, magnesium supplementation through drinking water for 2 days prior to harvest does not appear to be a method to consistently improve pork quality.

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Mosoa, Moleboheng Wilhelmina. « Assessment of approaches to determine the water quality status of South African catchments ». Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/33159.

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The paradigm shift in water quality management of South African water resources was based on current international trends. This significant move was from a previous emphasis on source management to a focus on finding a balance between water resource protection and water use. The current approach requires that water quality and quantity should be maintained for sustainable functioning of both the natural aquatic environment and socioeconomic development. This approach has placed the assessment of water quality status as a key decision tool in water quality management. Various assessment tools have been utilized to quantify the quality of South African water resources. In this study we assessed the compatibility of some of the methodologies that have been used in the Department of Water Affairs to determine and report on the water quality status of the resource. During the assessment the context and manner in which these methodologies can be utilized in water quality management were also addressed The Compliance Evaluation and Fitness for use categorization methodologies are both used to describe the water quality threshold of potential concern when dealing with the resource. Compliance Evaluation methodology uses a pass or fail assessment, while the Fitness for use categorization methodology uses a scaled approach allowing for the assessment of gradual change in the system. The out puts of these two methodologies, the Resource Water Quality Objectives and Fitness for use categories/ classes have both been used in the department as benchmarks to describe the current water quality status The assessment of the two methodologies indicated that there are similarities in the approaches and the principles behind the two processes. The observation of the results, however, indicated differences in the manner of presentation of the results, the interpretation of the outcome and in how water quality management measures that needs to be implemented are linked. Both methodologies are easy to apply when conducting water quality status assessments. However, the two methodologies are not sufficient on their own when making decisions on water quality management. It was concluded that although the compliance evaluation methodology can play a pivotal role when setting end of pipe standards, the process needs to consider the gradual changes of water quality in the river system in order to enable instigation of different water quality management measures at appropriate levels. Further it was recommended that with some modification the two approaches can be applied to assess water quality to support adequate water quality management decisions at various levels.
Dissertation (MSc)--University of Pretoria, 2013.
gm2014
Animal and Wildlife Sciences
Unrestricted

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Muller, Mike, et Mike Muller. « Water quality of open pit Lake Cospuden status and modeling approaches ». Thesis, The University of Arizona, 1997. http://hdl.handle.net/10150/626776.

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Lake Cospuden is an open pit lake in the mining region of Middle Germany south of the city of Leipzig. The lake which will be used for recreation is filling with recovering groundwater, surface water, and groundwater pumped form the neighboring Zwenkau mine, and is projected to reach its final water level by 2000. The physical limnology of Lake Cospuden is changing during the filling period from an unstratified to a stratified lake with a hypolimnion that is approximately twice as large as the epilimnion. The water quality is typical for a mining lake with low pH and high metal concentration. Due to the filling with neutral surface water, recovery of the initially low pH lake water can be observed. The microbiological environment is attenuated by relatively high phosphorus and nitrogen concentrations, but low chlorophyll-a concentrations, which might be attributed to carbon limitation of photosynthesis due to the low pH. After a rev1ew of general lake models, two models COLQUAL and AQUAMODl, were chosen to simulated the eutrophication process. COLQUAL indicated phosphorus and light as the limiting factors. AQUAMODl, which was modified to incorporate carbon limited photosynthesis, indicated that the eutrophication process is governed by carbon limitation and a mechanism that keeps the soluble reactive phosphorus concentration low, despite of high total phosphorus concentrations. This mechanism was assumed to be related to binding of phosphorus by suspended matter (e.g. clays) which creates turbidity observed in the lake. This study has a preliminary character and identifies future research. Because of its mining history, Lake Cospuden is a unique system and will require alternative approaches in order to evaluate and predict the water quality. Some first steps were attempted in this study.

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Schwartz, Jonathan Aaron. « Compliance with environmental policies in China the role of state capacity / ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ59065.pdf.

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Schneider, Seth J. « Hydrothermal and water quality modelng for evaluation of Ashumet Pond trophic state ». Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42637.

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Filho, Aldeney Andrade Soares. « Phytoplankton Community and Water Quality, Aquatic Ecosystems in the State of CearÃ ». Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7761.

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RESUMO A Ãgua constitui o recurso de maior importÃncia para o homem, no entanto parece nÃo existir nenhuma preocupaÃÃo do ser humano em preservÃ-la, uma vez que as atividades diÃrias estÃo prejudicando cada vez mais, a qualidade deste recurso. Este trabalho teve por objetivo analisar a estrutura da comunidade fitoplanctÃnica e a qualidade da Ãgua de ecossistemas aquÃticos do Estado do CearÃ (Brasil). Foram realizadas coletas mensais nas estaÃÃes chuvosa e seca, entre 2004 e 2007, nos seguintes ecossistemas: estuÃrios dos rios CauÃpe, MundaÃ, CearÃ e Malcozinhado; lagoas de Jijoca, PecÃm, UruaÃ e Maraponga; bicas do Ipu e das AndrÃas e aÃudes Favelas, da Corte e Campus do Itaperi. Os resultados mostraram mudanÃa significativa na estrutura da comunidade fitoplanctÃnica, influenciada principalmente pelos nÃveis de precipitaÃÃes pluviomÃtricas. As Bacillariophyceae foram predominantes nos ecossistemas analisados, exceto nos aÃudes Favelas, da Corte e do Campus do Itaperi, que apresentaram elevados nÃveis de eutrofizaÃÃo, com dominÃncia de Cyanophyceae, Zygnematophyceae e Chlorophyceae, respectivamente. As espÃcies raras, a grande maioria, formaram um grupo totalmente isolado daquelas consideradas dominantes, abundantes e pouco abundantes, constituÃdas por um nÃmero reduzido de espÃcies, confirmando a grande influÃncia sazonal da regiÃo, sobre a comunidade fitoplanctÃnica. Os ecossistemas apresentaram grande variaÃÃo na diversidade, riqueza e equitabilidade das espÃcies, no entanto a diversidade foi maior durante a estaÃÃo chuvosa. Com base nos teores de O2 e CO2 dissolvidos, amÃnia total, nitrito, fosfato, bem como, nos Ãndices do estado trÃfico do fosfato e/ou da transparÃncia da Ãgua e na presenÃa de bioindicadores, os estuÃrios dos rios MundaÃ, CauÃpe e CearÃ, a lagoa da Maraponga e os aÃudes Favelas, da Corte e Campus do Itaperi foram classificados como ambientes eutrÃficos; o estuÃrio do Rio Malcozinhado e as lagoas do PecÃm e de UruaÃ como mesotrÃficos; e a lagoa de Jijoca e as bicas do Ipu e das AndrÃas como oligotrÃficos. Foram registrados diversos bioindicadores de Ãguas eutrofizadas e/ou poluÃdas, destacando-se a presenÃa de Cyanophyceae potencialmente tÃxicas nos diversos ecossistemas, com blooms no estuÃrio do Rio CearÃ e no aÃude Favelas, nÃo sendo registrada uma biomassa significativa nos outros ambientes, mesmo naqueles que apresentaram elevado estado trÃfico, como o aÃude do Campus do Itaperi, com ocorrÃncia de bloom de Chlorophyceae e, no aÃude da Corte, cujo bloom foi de Zygnematophyceae, mostrando que na anÃlise de sanidade dos ecossistemas aquÃticos, a anÃlise conjunta dos parÃmetros biolÃgicos e fÃsico-quÃmicos do ecossistema Ã de suma importÃncia para um parecer ambiental adequado.
Water is the most important resource for humans, though it s eems there is no concern of human beings in preserving it, because daily activities increasingly under mine the quality of this resource. This study aimed to analyze the phytoplankton community structure and water quality in aquatic ecosystems of CearÃ State (Brazil). Monthly collections were made during the rainy and dry seasons between 2004 and 2007 in the following ecosystems: the CauÃpe, MundaÃ, CearÃ and Malcozinhado river estuarie s; the Jijoca, PecÃm, UruaÃ and Maraponga lakes; the Ipu and Andreas waterspouts and the Favelas, Corte and Campus do Itaperi dams. The results showed significant changes in phytoplankton community structure, mainly influenced by levels of rainfall. The Bacillariophyceae were predominant in the ecosystems studied, except in the Favelas, Corte and Campus do Itaperi dams, which showed high levels of eutrophication, with dominance of Cyanophyceae, Zygnematophyceae and Chlorophyceae, respectively. Rare species, the great majorit y, formed a group totally isolated from those considered dominant, abundant and little abundant, consisting of a small number of species, confirming the major seasonal influence of the region's on the phytoplankton community. Ecosystems showed great variation in diversity, richness and evenness of species, however, diversity was highest during the rainy season. The following environments were classified according to the concentration of dissolved O 2 and CO2, total ammonia, nitrite, phosphate, as well as on trophic status indices of phosphate and/or water transparency and on the presence of bioindicators: the MundaÃ, CauÃpe and CearÃ river estuaries, Maraponga lake and the Favelas, Corte and Campus do Itaperi dams as eutrophic environments; the Malcozinhado river estuary and PecÃm and UruaÃ lakes as mesotrophic environments; and Jijoca lake and the Ipu and AndrÃas waterspouts as oligotrophic environment. Several bioindicators of eutrophic and/or polluted waters were recorded, in partic ular the presence of potentially toxic cyanobacteria in various ecosystems, with blooms in the CearÃ river estuary and Favelas dam, while significant biomass was not recorded in other environments, even those showing a high trophic status, such as the Campus do Itaperi dam, with a Chlorophyceae bloom, and the Corte dam, with a Zygnematophyceae bloom, showing that the joint analysis of biological and physicochemical parameters of the ecosystem is of paramount importance for an appropriate environmental assessment of the health of aquatic cosystems.

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Liu, Zhijun. « Effective modeling of agricultural practices within large-scale hydrologic and water quality simulations ». Diss., Mississippi State : Mississippi State University, 2006. http://library.msstate.edu/etd/show.asp?etd=etd-11082006-162139.

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Livres sur le sujet "Water quality statu"

North Dakota. Division of Water Supply and Pollution Control., dir. The Status of water quality in the state of North Dakota, 1984-1985. [Bismarck, N.D.] : North Dakota State Dept. of Health, Division of Water Supply & Pollution Control, 1986.

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Geological Survey (U.S.), dir. Federal-state cooperative water resources program : Ground-water activities. [Denver, Colo.?] : U.S. Geological Survey, Dept. of the Interior : [Books and Open-File Reports Section, distributor], 1988.

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Service, United States Extension. State extension water quality coordinators. [Washington, D.C.?] : U.S. Dept. of Agriculture, Extension Service, 1992.

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Washington (State). Dept. of Ecology., dir. Washington State water quality indicators. [Olympia, WA.] : Washington State Dept. of Ecology, 1999.

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Section, California Dept of Water Resources Water Quality. State Water Project : Water quality : 1992 and 1993. Sacramento, CA : California Dept. of Water Resources, Division of Operations and Maintenance, Water Quality Section, 1995.

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Commission, Texas Water, dir. The State of Texas water quality inventory. 9^e éd. Austin, Tex. (P.O. Box 13087, Austin 78711) : Texas Water Commission, 1988.

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Montoya, Barry L. Water quality in the State Water Project, 2000 and 2001. [Sacramento, Calif.] : State of California, the Resources Agency, Dept. of Water Resources, Division of Operations and Maintenance, Environmental Assessment Branch, 2004.

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Ritchie, Jerry C. Water quality research : Status report, 1991. Beltsville, Md.] : U.S. Dept. of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, 1992.

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Chapitres de livres sur le sujet "Water quality statu"

Rai, Raveendra Kumar, Alka Upadhyay, C. Shekhar P. Ojha et Vijay P. Singh. « Water Quality Index and Status ». Dans Water Science and Technology Library, 307–56. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2001-5_11.

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Tadić, Lidija, Marija Šperac, Barbara Karleuša et Josip Rubinić. « Water Quality Status of Croatian Surface Water Resources ». Dans Springer Water, 133–58. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22468-4_6.

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Benedini, Marcello, et George Tsakiris. « The Steady-State Case ». Dans Water Quality Modelling for Rivers and Streams, 103–7. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5509-3_10.

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Singh, Rajesh, Daniel Kanbienaa et Ashish Pandey. « Water Quality Status of Upper Ganga Canal ». Dans Climate Impacts on Water Resources in India, 21–34. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51427-3_3.

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Kubiak-Wójcicka, Katarzyna, et Monika Kielik. « The State of Water and Sewage Management in Poland ». Dans Quality of Water Resources in Poland, 375–97. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64892-3_16.

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Łabędzki, Leszek, Edmund Kaca et Andrzej Brandyk. « Irrigation and Drainage in Polish Agriculture : State, Problems and Needs ». Dans Quality of Water Resources in Poland, 91–118. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64892-3_5.

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Goncharuk, Vladyslav V. « SOS : Drinking Water. New State Standard “Drinking Water. Requirements and Methods of Quality Control” ». Dans Drinking Water, 403–16. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04334-0_7.

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Samsunlu, A., B. Beler Baykal et G. Ubay. « Water Quality Risks in Istanbul, Past and Present Status ». Dans Water Resources Engineering Risk Assessment, 483–502. Berlin, Heidelberg : Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76971-9_25.

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Dimitrovska, Olgica, Ivan Radevski et Svemir Gorin. « Water Quality and Pollution Status of the Main Rivers in the Republic of North Macedonia ». Dans Springer Water, 389–418. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22468-4_15.

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Singh, K. P. « Water Quality and Health Issues in South-West Parts of Punjab State, India ». Dans Water and Health, 385–97. New Delhi : Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1029-0_23.

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Actes de conférences sur le sujet "Water quality statu"

Omer, H. M. A. M. « Evaluation of groundwater quality in Dongula basin : the Northern state of Sudan ». Dans WATER POLLUTION 2012. Southampton, UK : WIT Press, 2012. http://dx.doi.org/10.2495/wp120061.

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Dada, T. E., E. E. Awokunmi, C. R. Falegan et E. O. Olanipekun. « Status of ground water quality in selected areas of Ado-Ekiti, Nigeria ». Dans WATER RESOURCES MANAGEMENT 2011. Southampton, UK : WIT Press, 2011. http://dx.doi.org/10.2495/wrm110291.

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Etteieb, S., A. Kawachi, J. Han, J. Tarhouni et H. Isoda. « An evaluation of the environmental state of surface water quality using modified E-screen assay ». Dans WATER POLLUTION 2014. Southampton, UK : WIT Press, 2014. http://dx.doi.org/10.2495/wp140041.

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« WATER QUALITY ASSESSMENT OF OYO STATE, NIGERIA ». Dans 2005 Tampa, FL July 17-20, 2005. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2005. http://dx.doi.org/10.13031/2013.18926.

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Liu Ke. « Core status monitoring technology in environmental quality monitoring ». Dans 2011 International Symposium on Water Resource and Environmental Protection (ISWREP). IEEE, 2011. http://dx.doi.org/10.1109/iswrep.2011.5893528.

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Rocha, Caio, Alana Natalí Mânica, Renata Suzi Gomes et Ricardo de Lima Isaac. « Análise temporal do índice de qualidade da água (iqa) na bacia do rio Jundiaí e o impacto da pandemia de covid-19 no monitoramento de sistemas hídricos ». Dans INTERNATIONAL WORKSHOP FOR INNOVATION IN SAFE DRINKING WATER. Universidade Estadual de Campinas, 2022. http://dx.doi.org/10.20396/iwisdw.n1.2022.4798.

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The water quality index (WQI) is a tool based on some physical, chemical and biological parameters, to directly qualify water in a single indexed value. The Jundiai River Basin, located in São Paulo State/Brazil, is an urbanized watershed and suffers from historical problems related to the quality of its water resources. This study aimed to analyze the WQI from 11 monitoring points along the Jundiai River Basin in two different periods (2010/2011) and (2020/2021). Secondary temporal data of water quality parameters were collected and the computed indexes were spatially interpolated. As results, improvements in water quality were observed in 4 sampling points, all of them located in the Jundiai River. Two, and two other sampling points, tributaries of the Jundiai River, has reduced in WQI category. The SARS-CoV-2 pandemic had a negative impact on field data collect for WQI measurement in Jundiai River Basin. This may affect the accuracy of WQI values for the period 2020/2021.

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Mestrinho, S. S. P., D. Reitemajer, D. C. Porciúncula et R. Lyrio. « Evaluation of the surface water quality in the Itapicuru river basin—State of Bahia, Brazil ». Dans WATER RESOURCES MANAGEMENT IV. Southampton, UK : WIT Press, 2007. http://dx.doi.org/10.2495/wrm070141.

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Gongden, J. J., et Y. N. Lohdip. « Seasonal variation of the surface water quality of two dams in Plateau State, north central Nigeria ». Dans WATER RESOURCES MANAGEMENT 2015. Southampton, UK : WIT Press, 2015. http://dx.doi.org/10.2495/wrm150251.

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Hayat, Fauzul, et Nia Kurniatillah. « Microbiological and Water Quality Status of Cibanten River ». Dans The First International Conference on Social Science, Humanity, and Public Health (ICOSHIP 2020). Paris, France : Atlantis Press, 2021. http://dx.doi.org/10.2991/assehr.k.210101.043.

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Dabrowski, Joel Janek, Ashfaqur Rahman, Andrew George, Stuart Arnold et John McCulloch. « State Space Models for Forecasting Water Quality Variables ». Dans KDD '18 : The 24th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. New York, NY, USA : ACM, 2018. http://dx.doi.org/10.1145/3219819.3219841.

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Rapports d'organisations sur le sujet "Water quality statu"

Weissinger, Rebecca. Trends in water quality at Bryce Canyon National Park, water years 2006–2021. Sous la direction de Alice Wondrak Biel. National Park Service, novembre 2022. http://dx.doi.org/10.36967/2294946.

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The National Park Service collects water-quality samples on a rotating basis at three fixed water-quality stations in Bryce Canyon National Park (NP): Sheep Creek, Yellow Creek, and Mossy Cave Spring. Data collection began at Sheep Creek and Yellow Creek in November 2005 and at Mossy Cave in July 2008. Data on in-situ parameters, fecal-coliform samples, major ions, and nutrients are collected monthly, while trace elements are sampled quarterly. This report analyzes data from the beginning of the period of record for each station through water year 2021 to test for trends over time. Concentrations are also compared to relevant water-quality standards for the State of Utah. Overall, water quality at the park’s monitoring stations continues to be excellent, and park managers have been successful in their goal of maintaining these systems in unimpaired condition. Infrequent but continued Escherichia coli exceedances from trespass livestock at Sheep and Yellow creeks support the need for regular fence maintenance along the park boundary. High-quality conditions may qualify all three sites as Category 1 waters, the highest level of anti-degradation protection provided by the State of Utah. Minimum and maximum air temperatures at the park have increased, while precipitation remains highly variable. Increasing air temperatures have led to increasing water temperatures in Sheep and Yellow creeks. Sheep Creek also had a decrease in flow across several quantiles from 2006 to 2021, while higher flows decreased at Yellow Creek in the same period. Surface flows in these two creeks are likely to be increasingly affected by higher evapotranspiration due to warming air temperatures and possibly decreasing snowmelt runoff as the climate changes. The influx of ancient groundwater in both creek drainages helps sustain base flows at the sites. Mossy Cave Spring, which is sampled close to the spring emergence point, showed less of a climate signal than Sheep and Yellow creeks. In our record, the spring shows a modest increase in discharge, including higher flows at higher air temperatures. An uptick in visitation to Water Canyon and the Mossy Cave Trail has so far not been reflected by changes in water quality. There are additional statistical trends in water-quality parameters at all three sites. However, most of these trends are quite small and are likely ecologically negligible. Some statistical trends may be the result of instrument changes and improvements in quality assurance and quality control over time in both the field sampling effort and the laboratory analyses. Long-term monitoring of water-quality stations at Bryce Canyon NP suggests relatively stable aquatic systems that benefit from protection within the park. To maintain these unimpaired conditions into the future, park managers could consider: Regular fence checks and maintenance along active grazing allotments at the park boundary to protect riparian areas and aquatic systems from trespass livestock. Developing a springs-monitoring program to track changes in springflow at spring emergences to better understand bedrock-aquifer water supplies. These data would also help quantify springflow for use in water-rights hearings. Supporting hydrogeologic investigations to map the extent and flow paths of groundwater aquifers. Working with the State of Utah to develop groundwater-protection zones to protect groundwater aquifers from developments that would affect springs in the park. Prioritizing watershed management with proactive fire risk-reduction practices. Explicitly including watershed protection as a goal in plans for fire management and suppression. Using additional data and analyses to better understand the drivers of trends in water quality and their ecological significance. These could include higher-frequency data to better understand relationships between groundwater, precipitation, and surface flows at the sites. These could also include watershed metrics...

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Shrestha, M., et R. Shilpakar. Water Quality in South Asia : Issues and Status : SAWAN Workshop Proceedings. Kathmandu, Nepal : International Centre for Integrated Mountain Development (ICIMOD), 2005. http://dx.doi.org/10.53055/icimod.438.

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Rosse, Anine, et Myles Cramer. Water quality monitoring for Knife River Indian Villages National Historic Site : 2019 data report. National Park Service, décembre 2022. http://dx.doi.org/10.36967/2295547.

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The Northern Great Plains Inventory and Monitoring Network (NGPN) began monitoring water quality in the Knife River at Knife River Indian Villages National Historic Site (KNRI) in 2013, with the assistance of the U.S. Geological Survey (USGS). This report summarizes the data collected during the 2019 ice-free season (April 18 through October 31) for streamflow, water temperature, dissolved oxygen, specific conductance, and pH. This was the third season of continuous monitoring. 2019 began as moderately dry year until discharge on the Knife River peaked at 1,900 cubic feet per second in September following unusually heavy precipitation. There was considerable seasonal variation in all water quality measures. A summary of our results can be found in Descriptive Statistics Summary tables for the ice-free season (Table 2) and for each month (Table 3). Notably, water temperature exceeded state standards (Table 1) in summer months although these exceedances made up less than 1% of all records. Additionally, dissolved oxygen was observed below state standards twice on the same day in June, but Knife River still met the dissolved oxygen standard due to the brief nature of this deficiency. NGPN’s collaboration with USGS supported real-time and archived access to this data through the USGS National Water Information System Website KNIFE RIVER NR STANTON, ND - USGS Water Data for the Nation, where it remains available to the public

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Bedford, Philip, Alexis Long, Thomas Long, Erin Milliken, Lauren Thomas et Alexis Yelvington. Legal Mechanisms for Mitigating Flood Impacts in Texas Coastal Communities. Sous la direction de Gabriel Eckstein. Texas A&M University School of Law Program in Natural Resources Systems, mai 2019. http://dx.doi.org/10.37419/eenrs.mitigatingfloodimpactstx.

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Flooding is a major source of concern for Texas’ coastal communities. It affects the quality of infrastructure, the lives of citizens, and the ecological systems upon which coastal communities in Texas rely. To plan for and mitigate the impacts of flooding, Texas coastal communities may implement land use tools such as zoning, drainage utility systems, eminent domain, exactions, and easements. Additionally, these communities can benefit from understanding how flooding affects water quality and the tools available to restore water bodies to healthy water quality levels. Finally, implementing additional programs for education and ecotourism will help citizens develop knowledge of the impacts of flooding and ways to plan and mitigate for coastal flooding. Land use tools can help communities plan for and mitigate flooding. Section III addresses zoning, a land use tool that most municipalities already utilize to organize development. Zoning can help mitigate flooding, drainage, and water quality issues, which, Texas coastal communities continually battle. Section IV discusses municipal drainage utility systems, which are a mechanism available to municipalities to generate dedicated funds that can help offset costs associated with providing stormwater management. Section V addresses land use and revenue-building tools such as easements, eminent domain, and exactions, which are vital for maintaining existing and new developments in Texas coastal communities. Additionally, Section VI addresses conservation easements, which are a flexible tool that can enhance community resilience through increasing purchase power, establishing protected legal rights, and minimizing hazardous flood impacts. Maintaining good water quality is important for sustaining the diverse ecosystems located within and around Texas coastal communities. Water quality is regulated at the federal level through the Clean Water Act. As discussed in Section VII, the state of Texas is authorized to implement and enforce these regulations by implementing point source and nonpoint source pollutants programs, issuing permits, implementing stormwater discharge programs, collecting water quality data, and setting water quality standards. The state of Texas also assists local communities with implementing restorative programs, such as Watershed Protection Programs, to help local stakeholders restore impaired water bodies. Section VIII addresses ecotourism and how these distinct economic initiatives can help highlight the importance of ecosystem services to local communities. Section VIX discusses the role of education in improving awareness within the community and among visitors, and how making conscious decisions can allow coastal communities to protect their ecosystem and protect against flooding.

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Fowler, W. B., T. D. Anderson et J. D. Helvey. Changes in water quality and climate after forest harvest in central Washington state. Portland, OR : U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1988. http://dx.doi.org/10.2737/pnw-rp-388.

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Dahl, Kristina, et Carly Phillips. Fire and Water in the Western United States. Union of Concerned Scientists, juin 2022. http://dx.doi.org/10.47923/2022.14633.

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Escalating wildfires across the Western United States threaten water resources for millions of people. By altering how precipitation and water move through ecosystems, wildfires can increase the risk of erosion and landslides and disrupt water quality and availability. Climate change is expected to further worsen wildfires, but local, state, and federal actions can help protect against the threats these fires pose to water resources. Reductions in heat- trapping emissions, active forest management, and investments in climate-resilient water infrastructure would limit the risks wildfires pose to the region’s already limited water resources.

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Desiderati, Christopher. Carli Creek Regional Water Quality Project : Assessing Water Quality Improvement at an Urban Stormwater Constructed Wetland. Portland State University, 2022. http://dx.doi.org/10.15760/mem.78.

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Stormwater management is an ongoing challenge in the United States and the world at-large. As state and municipal agencies grapple with conflicting interests like encouraging land development, complying with permits to control stormwater discharges, “urban stream syndrome” effects, and charges to steward natural resources for the long-term, some agencies may turn to constructed wetlands (CWs) as aesthetically pleasing and functional natural analogs for attenuating pollution delivered by stormwater runoff to rivers and streams. Constructed wetlands retain pollutants via common physical, physicochemical, and biological principles such as settling, adsorption, or plant and algae uptake. The efficacy of constructed wetlands for pollutant attenuation varies depending on many factors such as flow rate, pollutant loading, maintenance practices, and design features. In 2018, the culmination of efforts by Clackamas Water Environment Services and others led to the opening of the Carli Creek Water Quality Project, a 15-acre constructed wetland adjacent to Carli Creek, a small, 3500-ft tributary of the Clackamas River in Clackamas County, OR. The combined creek and constructed wetland drain an industrialized, 438-acre, impervious catchment. The wetland consists of a linear series of a detention pond and three bioretention treatment cells, contributing a combined 1.8 acres of treatment area (a 1:243 ratio with the catchment) and 3.3 acre-feet of total runoff storage. In this study, raw pollutant concentrations in runoff were evaluated against International Stormwater BMP database benchmarks and Oregon Water Quality Criteria. Concentration and mass-based reductions were calculated for 10 specific pollutants and compared to daily precipitation totals from a nearby precipitation station. Mass-based reductions were generally higher for all pollutants, largely due to runoff volume reduction on the treatment terrace. Concentration-based reductions were highly variable, and suggested export of certain pollutants (e.g., ammonia), even when reporting on a mass-basis. Mass load reductions on the terrace for total dissolved solids, nitrate+nitrite, dissolved lead, and dissolved copper were 43.3 ± 10%, 41.9 ± 10%, 36.6 ± 13%, and 43.2 ± 16%, respectively. E. coli saw log-reductions ranging from -1.3 — 3.0 on the terrace, and -1.0 — 1.8 in the creek. Oregon Water Quality Criteria were consistently met at the two in-stream sites on Carli Creek for E. coli with one exception, and for dissolved cadmium, lead, zinc, and copper (with one exception for copper). However, dissolved total solids at the downstream Carli Creek site was above the Willamette River guidance value 100 mg/L roughly 71% of the time. The precipitation record during the study was useful for explaining certain pollutant reductions, as several mechanisms are driven by physical processes, however it was not definitive. The historic rain/snow/ice event in mid-February 2021 appeared to impact mass-based reductions for all metals. Qualitatively, precipitation seemed to have the largest effect on nutrient dynamics, specifically ammonia-nitrogen. Determining exact mechanisms of pollutant removals was outside the scope of this study. An improved flow record, more targeted storm sampling, or more comprehensive nutrient profiles could aid in answering important questions on dominant mechanisms of this new constructed wetland. This study is useful in establishing a framework and baseline for understanding this one-of-a-kind regional stormwater treatment project and pursuing further questions in the future.

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Raymond, Kara, Laura Palacios, Cheryl McIntyre et Evan Gwilliam. Status of climate and water resources at Saguaro National Park : Water year 2019. Sous la direction de Alice Wondrak Biel. National Park Service, décembre 2021. http://dx.doi.org/10.36967/nrr-2288717.

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Climate and hydrology are major drivers of ecosystems. They dramatically shape ecosystem structure and function, particularly in arid and semi-arid ecosystems. Understanding changes in climate, groundwater, and water quality and quantity is central to assessing the condition of park biota and key cultural resources. The Sonoran Desert Network collects data on climate, groundwater, and surface water at 11 National Park Service units in south-ern Arizona and New Mexico. This report provides an integrated look at climate, groundwater, and springs conditions at Saguaro National Park (NP) during water year 2019 (October 2018–September 2019). Annual rainfall in the Rincon Mountain District was 27.36" (69.49 cm) at the Mica Mountain RAWS station and 12.89" (32.74 cm) at the Desert Research Learning Center Davis station. February was the wettest month, accounting for nearly one-quarter of the annual rainfall at both stations. Each station recorded extreme precipitation events (>1") on three days. Mean monthly maximum and minimum air temperatures were 25.6°F (-3.6°C) and 78.1°F (25.6°C), respectively, at the Mica Mountain station, and 37.7°F (3.2°C) and 102.3°F (39.1°C), respectively, at the Desert Research Learning Center station. Overall temperatures in WY2019 were cooler than the mean for the entire record. The reconnaissance drought index for the Mica Mountain station indicated wetter conditions than average in WY2019. Both of the park’s NOAA COOP stations (one in each district) had large data gaps, partially due to the 35-day federal government shutdown in December and January. For this reason, climate conditions for the Tucson Mountain District are not reported. The mean groundwater level at well WSW-1 in WY2019 was higher than the mean for WY2018. The water level has generally been increasing since 2005, reflecting the continued aquifer recovery since the Central Avra Valley Storage and Recovery Project came online, recharging Central Arizona Project water. Water levels at the Red Hills well generally de-clined starting in fall WY2019, continuing through spring. Monsoon storms led to rapid water level increases. Peak water level occurred on September 18. The Madrona Pack Base well water level in WY2019 remained above 10 feet (3.05 m) below measuring point (bmp) in the fall and winter, followed by a steep decline starting in May and continuing until the end of September, when the water level rebounded following a three-day rain event. The high-est water level was recorded on February 15. Median water levels in the wells in the middle reach of Rincon Creek in WY2019 were higher than the medians for WY2018 (+0.18–0.68 ft/0.05–0.21 m), but still generally lower than 6.6 feet (2 m) bgs, the mean depth-to-water required to sustain juvenile cottonwood and willow trees. RC-7 was dry in June–September, and RC-4 was dry in only September. RC-5, RC-6 and Well 633106 did not go dry, and varied approximately 3–4 feet (1 m). Eleven springs were monitored in the Rincon Mountain District in WY2019. Most springs had relatively few indications of anthropogenic or natural disturbance. Anthropogenic disturbance included spring boxes or other modifications to flow. Examples of natural disturbance included game trails and scat. In addition, several sites exhibited slight disturbance from fires (e.g., burned woody debris and adjacent fire-scarred trees) and evidence of high-flow events. Crews observed 1–7 taxa of facultative/obligate wetland plants and 0–3 invasive non-native species at each spring. Across the springs, crews observed four non-native plant species: rose natal grass (Melinis repens), Kentucky bluegrass (Poa pratensis), crimson fountaingrass (Cenchrus setaceus), and red brome (Bromus rubens). Baseline data on water quality and chemistry were collected at all springs. It is likely that that all springs had surface water for at least some part of WY2019. However, temperature sensors to estimate surface water persistence failed...

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Cohen, Yafit, Carl Rosen, Victor Alchanatis, David Mulla, Bruria Heuer et Zion Dar. Fusion of Hyper-Spectral and Thermal Images for Evaluating Nitrogen and Water Status in Potato Fields for Variable Rate Application. United States Department of Agriculture, novembre 2013. http://dx.doi.org/10.32747/2013.7594385.bard.

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Potato yield and quality are highly dependent on an adequate supply of nitrogen and water. Opportunities exist to use airborne hyperspectral (HS) remote sensing for the detection of spatial variation in N status of the crop to allow more targeted N applications. Thermal remote sensing has the potential to identify spatial variations in crop water status to allow better irrigation management and eventually precision irrigation. The overall objective of this study was to examine the ability of HS imagery in the visible and near infrared spectrum (VIS-NIR) and thermal imagery to distinguish between water and N status in potato fields. To lay the basis for achieving the research objectives, experiments in the US and in Israel were conducted in potato with different irrigation and N-application amounts. Thermal indices based merely on thermal images were found sensitive to water status in both Israel and the US in three potato varieties. Spectral indices based on HS images were found suitable to detect N stress accurately and reliably while partial least squares (PLS) analysis of spectral data was more sensitive to N levels. Initial fusion of HS and thermal images showed the potential of detecting both N stress and water stress and even to differentiate between them. This study is one of the first attempts at fusing HS and thermal imagery to detect N and water stress and to estimate N and water levels. Future research is needed to refine these techniques for use in precision agriculture applications.

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