Bibliografías temáticas / Effect of water quality on

Literatura académica sobre el tema "Effect of water quality on"

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Publicado: 4 de junio de 2021

Última modificación: 28 de julio de 2024

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Artículos de revistas sobre el tema "Effect of water quality on"

Asghari, Maryam. "Pollution Haven Effect and Water Quality". International Academic Journal of Economics 06, n.º 01 (25 de junio de 2019): 91–109. http://dx.doi.org/10.9756/iaje/v6i1/1910007.

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Hyun-Joo, Lee. "Application Effect of Water Quality HSPE & EPDC Models Used to Improve Water Quality in G lake". Journal of the Korean Society for Environmental Technology 22, n.º 5 (31 de octubre de 2021): 344–52. http://dx.doi.org/10.26511/jkset.22.5.5.

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Besner, Marie-Claude, Jean Lavoie, Chantal Morissette, Pierre Payment y Michèle Prévost. "Effect of water main repairs on water quality". Journal - American Water Works Association 100, n.º 7 (julio de 2008): 95–109. http://dx.doi.org/10.1002/j.1551-8833.2008.tb09679.x.

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El Khanji, Souha y John Hudson. "Water utilization and water quality in endogenous economic growth". Environment and Development Economics 21, n.º 5 (18 de abril de 2016): 626–48. http://dx.doi.org/10.1017/s1355770x16000061.

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AbstractOur study examines the effect of water utilization together with the effect of water quality on economic growth across countries. We constructed a panel of 177 countries covering the period of 1960–2009. We analyse two dependent variables, gross domestic product per capita and the average of five years of growth. The analysis is conducted using a fixed effects model and fixed effects with instrumental variables. We find that although water utilization affects growth, water quality also proves to be highly significant and affects growth in both the short and long run to a greater degree than water quantity.

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Barbé, Donald E., Susanne Carnelos y J. Alex McCorquodale. "CLIMATIC EFFECT ON WATER QUALITY EVALUATION". Journal of Environmental Science and Health, Part A 36, n.º 10 (30 de noviembre de 2001): 1919–33. http://dx.doi.org/10.1081/ese-100107438.

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Lugovska, Oksana y Vasyl Sydor. "Hydrocolloids Effect on the Quality of Oil-Water Emulsion for Foodstuffs and Beverages". Chemistry & Chemical Technology 10, n.º 1 (15 de marzo de 2016): 97–104. http://dx.doi.org/10.23939/chcht10.01.097.

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. M, Kamalanandhini, Kalaivizhi . R, Golda Percy. VP, Srividhya . S, Dheepak . S y K. Thiyaneshwaran. K. "EFFECT OF FLOOD EVENT ON WATER QUALITY". Rasayan Journal of Chemistry 12, n.º 02 (2019): 849–54. http://dx.doi.org/10.31788/rjc.2019.1225232.

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Sato, Takehiko, Masanobu Oizumi, Takashi Miyahara y Tatsuyuki Nakatani. "309 Effect of discharge phenomenon on water quality in water". Proceedings of the Symposium on Environmental Engineering 2010.20 (2010): 197–98. http://dx.doi.org/10.1299/jsmeenv.2010.20.197.

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Kim, Jinkeun. "Effect of raw water quality decrease on water treatment costs". Journal of the Korean Society of Water and Wastewater 34, n.º 4 (30 de agosto de 2020): 239–50. http://dx.doi.org/10.11001/jksww.2020.34.4.239.

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Mohamed, Hassan I. y Ali A. M. Gad. "Effect of Cold-Water Storage Cisterns on Drinking-Water Quality". Journal of Water Resources Planning and Management 137, n.º 5 (septiembre de 2011): 448–55. http://dx.doi.org/10.1061/(asce)wr.1943-5452.0000132.

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Tesis sobre el tema "Effect of water quality on"

Wu, Sophia(Sophia W. ). "Understanding the effect of intermittent water supply on drinking water quality". Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/131001.

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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program, February, 2021
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 78-82).
There are nearly 1 billion people who obtain their drinking water through piped distribution networks that operate intermittently. Intermittent Water Supply (IWS) operations allow for periods of stagnation and depressurization that create conditions favorable for biofilm growth on pipe surface. Biofilms are complex microbial communities that are likely sources of opportunistic waterborne pathogens and can cause disease outbreaks. Flushing of the water pipes and re-pressurization, which occur at the start of each IWS supply cycle, cause the erosion of the biofilm and its transport into the bulk water, which can potentially contaminate the drinking water. This thesis describes the development and proof-testing of an experimental pipe testbed installed on the Nanyang Technological University (NTU) campus in Singapore.
The testbed comprises an array of 100 mm diameter PVC pipes, supplied from a water tank with flow paths controlled through a set of valves, and water samples obtained at up to 7 pipe outlets. Data are presented from an initial program of tests that compare the effects of priming for two pipe sections: 1) with continuous laminar flow (Continuous Water Supply, CWS) under pressure; and 2) IWS, where the pipe section is flushed during re-pressurization (supply period) and then allowed to drain and stagnate for the remainder of the daily cycle. The change of the water quality from both the inlet and outlet was evaluated by determining the microbial load using flow cytometry (with Live/Dead staining), together with physical and chemical water parameters measured on a time series of water samples.
The data compare the response of the CWS pipe section for steady laminar flow, with the transient response following a step-change in flow rate (turbulent conditions) with transient behavior during flushing of the IWS section. Initial filling of the IWS section cause a significant increase in total and live cell counts, confirming that erosion of biofilm can contribute to biomass transported in the bulk water. Further tests are in progress to validate and replicate these results.
by Sophia Wu.
S.M. in Technology and Policy
S.M.inTechnologyandPolicy Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program

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Bastway, Mohammed Omer Abdalrahim. "Effect of Khartoum City for Water Quality : chemical analyses". Thesis, Linköping University, Department of Water and Environmental Studies, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10239.

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This thesis assesses the water quality of the River Nile around the city Khartoum in Khartoum State, Sudan Republic, and investigates eventual influences of the city on the River Nile by analysis of the following parameters: temperature, pH, and conductivity, and Adsorbable Organic Halogen (AOX), cadmium (Cd), lead (Pb), chromium (Cr), Total Organic Carbon(TOC) and Nitrate (NO3− ). A survey of the area is also included. It was concluded that the city Khartoum added small but legible concentrations of cadmium, lead, chromium and TOC to the river Nile. However, the resulting concentrations were all within acceptable levels. Also, the observed results showed that the Blue and White Nile, which merge together upstream on the outskirts of Khartoum, had concentrations of AOX resp. chromium, which were not suitable for drinking water.

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Nilsson, Emmelie. "Algal blooms and water quality in coastal waters of Öland : Possible effect on local tourism?" Thesis, University of Kalmar, School of Pure and Applied Natural Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-1468.

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Utvecklingen av algblomningar i Östersjön har blivit mer diskuterat i media under senare år. Eftersom algblomningar ofta infaller samtidigt som turistsäsongen så har områden som är beroende av turistnäringen drabbats hårt. Under sommaren 2005 inträffade massiva giftiga algblomningar i Östersjön, och detta påverkade turismen på Öland negativt ur ekonomisk synpunkt. Mänsklig påverkan är ansedd vara huvudorsaken bakom den ökade förekomsten av algblomningar i Östersjön. Målet med detta projekt är att undersöka hur förekomsten av algblomningar påverkar turismen på Öland. Genom att ha samlat in vattenprover vid tre olika platser på Öland under sommaren 2007, har parametrar så som näringsstatus, temperatur, salthalt, phytoplankton sammansättning och klorofyll-a undersökts. Mängden nederbörd har observerats via data från SMHI. Detta har gjorts för att kunna studera eventuella samband mellan näringsstatus vid kusterna och möjlig avrinning från land. Två enkäter har skickats ut till samtliga camping ägare på Öland, i ett försök att se hur algblomningar har påverkat turismen under åren 2005, 2006 samt 2007. En enkät utdelades också under sommaren 2006, men denna var riktad till turisterna som besökte campingar på Öland. Ett av de slutliga målen var att undersöka hur förekomsten av algblomningar och miljöfaktorer, så som temperatur, salthalt, nederbörd och näringsämnen är sammankopplade. Provtagningsplatserna skiljde sig åt när det gällde till vilken grad de påverkats av algblomningar. Den nordvästra kusten, Köpingsvik, har nästan aldrig exponerats för algblomningar, medan den östra kusten, Gärdslösa, oftast har det. Den sydvästra kusten , Mörbylånga, har varit drabbad under vissa år. Detta material har sedan jämförts med material insamlat från 2006. Resultatet från 2007 visar på högre koncentrationer av näringsämnen och klorofyll-a jämfört med data från 2006. Resultatet från 2007 visar på högre koncentrationer av näringsämnen och klorofyll-a jämfört med data från 2006. Turismen under 2006 och 2007 visade inte ha varit negativt påverkat av algblomningar. Turismen under 2005 visade sig däremot ha varit negativt påverkat av algblomningar. Cyanobakterier förekom i lågt antal under 2006 och 2007, men andra alggrupper blommade under våren och sommaren, speciellt en grupp av sötvatten dinoflagellat kallad Peridiniopsis polonicum. Denna art förekomi höga antal i både Gärdslösa och Mörbylånga, under slutet av juli och i augusti.

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Le, Xuan Thinh, Xuan Hien Dang y Ngoc Trinh Truong. "Effect of phytase on the water quality of Vietnamese pangasius ponds". Technische Universität Dresden, 2018. https://tud.qucosa.de/id/qucosa%3A33314.

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Striped catfish (Pangasianodon hypophthalmus) is freshwater fish that is raising mainly in the Mekong Delta. The research was implemented at the Model Farm (College of Aquaculture and Fisheries), Can Tho University during 6 months from May to November of 2016 and aimed to evaluate the water quality between two treatments of feed in the pangasius production for proposing a better environmental management method. The treatment 1 (control treatment, CT) has two ponds used feed without adding phytase and treatment 2 (experiment treatment, ET) includes two ponds used feed with adding phytase. The results showed that the temperature, pH, DO, TSS, COD, BOD, N-NO2-, N-NO3-, TKN, TAN were not significantly different (p>0.05) between the CT and ET ponds. At the experiment pond (EP), the factors (TP: 2.28 mg/L; P-PO4 3-: 1.24 mg/L) which has P release to the environment are less than control pond (CP) (TP: 2.62 mg/L; P-PO4 3-: 2.13 mg/L). These results suggested that the addition of phytase in feed could contribute to reducing the nutrient to the water body of pangasius pond.
Cá tra (Pangasianodon hypophthalmus) là loài thủy sản nước ngọt được nuôi chủ yếu ở các tỉnh Đồng bằng sông Cửu Long. Nghiên cứu được thực hiện trong 6 tháng từ tháng 05 – 11/2016 tại Trang trại mẫu đặt tại Khoa Thủy sản, Trường Đại học Cần Thơ nhằm đánh giá chất lượng nước giữa 2 nghiệm thức thức ăn trong giai đoạn nuôi cá thịt để đề xuất biện pháp quản lý chất lượng nước ao nuôi tốt hơn. Nghiệm thức 1 (nghiệm thức đối chứng, CT) gồm 2 ao nuôi sử dụng thức ăn không bổ sung enzyme phytase, nghiệm thức 2 (nghiệm thức thí nghiệm, ET) gồm 2 ao nuôi sử dụng thức ăn có bổ sung enzyme phytase. Kết quả thí nghiệm cho thấy giá trị nhiệt độ, pH, DO, TSS, COD, BOD, H2S, N-NO2-, N-NO3-, TKN, TAN ở mức phù hợp cho ao đối chứng (CT). Tại ao thí nghiệm (ET) (TP:2,28 mg/L; P-PO4 3-: 1,24 mg/L) lượng P thải ra ít hơn so với ao CT (TP: 2,62 mg/L; P-PO4 3-: 2,13 mg/L) chứng tỏ việc bổ sung enzyme phytase trong thức ăn đã góp phần làm giảm lượng lân thải ra môi trường nước trong nuôi cá tra.

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Valdez, Aguilar Luis Alonso. "Effect of alkalinity in irrigation water on selected greenhouse crops". Texas A&M University, 2004. http://hdl.handle.net/1969.1/2773.

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Effect of Alkalinity in Irrigation Water on Selected Greenhouse Crops. (August 2004) Luis Alonso Valdez Aguilar, B.S., Universidad Aut??noma de Nuevo Le??n, Mexico; M.S., Universidad Aut??noma Chapingo, Mexico Chair of Advisory Committee: Dr. David Wm. Reed Bicarbonate (HCO3-) and carbonate (CO32-) are the most important ions that determine alkalinity. When the carbonates accumulate in a growing medium, the growing medium solution pH reaches levels that cause plant growth inhibition, which is caused primarily by the transformation of soluble forms of Fe into insoluble forms. The general objective of this research was to provide information about the limits of tolerance to alkalinity in ornamental plants, and to study the interaction of ions such as ammonium (NH4+) and nitrate (NO3-) on the response of plants to alkalinity, as well as the effect of the counter-ions potassium (K+), sodium (Na+), cesium (Cs+), ammonium (NH4+) and rubidium (Rb+). The maximum SPAD index was estimated to occur at 0 mM of NaHCO3 in chrysanthemum, mini-rose, and hibiscus ??Bimini Breeze?? and ??Mango Breeze??. For vinca it was set at 2.64 mM. A 15% decrease from the maximum SPAD index was considered the threshold to declare the toxic concentration of NaHCO3, which was calculated based on the maximum SPAD index predicted by the models. The toxic concentration of NaHCO3 was set at 4.1, 1.1, 6.7, 3.1, and 6.3 mM of NaHCO3 in chrysanthemum, mini-rose, vinca, and hibiscus ??Mango Breeze?? and ??Bimini Breeze??, respectively. Hibiscus ??Bimini Breeze?? was considered tolerant to alkalinity, due to increased Fe-reduction capacity and acidification of the growing medium. In the hydroponic experiment, results showed that the NH4+:NO3- ratio altered the response of sunflower plants to alkalinity. Sunflower plants grew better in solutions containing 5 mM NaHCO3 prepared with a 0.25:0.75 NH4+:NO3- ratio. This was possible due to the reaction of NH4+ with the HCO3-, which reduced its buffering capacity. The response to HCO3--induced alkalinity was modified by the counter-cation of HCO3-. In bean plants, at low-to-intermediate levels of Na+ and HCO3- induced approximately same growth decrease. At high concentration, Na+ induced a decrease on shoot growth that exceeded the toxic effects of HCO3-. Thus, the toxic effect of Na+ is higher than that of HCO3- when its concentration is high. Rubidium was extremely toxic at concentrations of 7.5 mM.

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Ijabadeniyi, Oluwatosin Ademola. "Effect of irrigation water quality on the microbiological safety of fresh vegetables". Thesis, University of Pretoria, 2010. http://hdl.handle.net/2263/25555.

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Irrigation water is perhaps the leading pre-harvest source of contamination of fresh vegetables in the world. In this thesis, the effect of source water from the Olifants River and the Wilge River on the bacterial quality of water in the Loskop Canal that they feed and also the subsequent contribution to the bacterial contamination of fresh vegetables was determined for a period of twelve months. Also effect of attachment time on the survival of Listeria monocytogenes and the effect of chlorine on L. monocytogenes attached to vegetables were determined. Finally, a step-wise logistic regression analysis was made to determine whether various predictor variables could be used to predict the occurrence of L. monocytogenes, Salmonella spp and intestinal Enterococcus in irrigation water and vegetables (i.e., cauliflower and broccoli). COD and turbidity were higher in the Olifants River and the Wilge River than in the Loskop Canal that they feed, according to the water guidelines set by the World Health Organisation (WHO) and the Republic of South Africa (RSA). The level of the COD and turbidity were significantly different in terms of the two rivers in comparison with the canal. Levels of faecal coliforms and Escherichia coli were also higher than the WHO standard. Staphyloccocus aureus, intestinal Enterococcus, Salmonella, L. monocytogenes were recovered from the two rivers and the canal. Apart from L. monocytogenes that was not recovered from cauliflower, all bacterial pathogens recovered from the surface water were recovered from the vegetables. This study also indicated that L. monocytogenes could attach to both surface and subsurface structures of both tomatoes and spinach within 30 min, and that even after 72 h, it still remained viable. It also indicated that chlorine treatment is more effective against surface L. monocytogenes compared with subsurface inoculated L. monocytogenes. Finally, the logistic regression analysis of the sampled data showed that COD was statistically reliable to indicate a high probability of L. monocytogenes, turbidity reliable to indicate a high probability of intestinal Enterococcus and faecal coliforms and coliforms reliable to indicate a high probability of Salmonella in irrigation water. Low aerobic colony count (ACC) was statistically significant for the prediction of the three pathogens on vegetables.
Thesis (PhD)--University of Pretoria, 2011.
Food Science
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Obergh, Victoria Lee. "Canal Maintenance Effects on Irrigation Water Quality". Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/582373.

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Canal maintenance, involving mechanical removal of sediments and algal growth from canal basins, is necessary for sustaining the viability of the irrigation water delivery system in the Imperial Valley of California. Maintenance activities, however, disturb canal sediments laden with bacteria and can negatively impact water quality downstream. Our work quantified fecal indicator bacteria (Escherichia coli) and pathogens (Salmonella) in canal water prior to, during, and post-maintenance events. The goal of this study was to construct a post-maintenance time matrix that will allow growers downstream to estimate when canal water once again meets water quality guidelines. In addition, we assessed the water quality impacts of lining canals with concrete, which is a costly endeavor in the short term, but may be beneficial in the long term as lined canals do not require routine dredging to maintain canal integrity. During eight maintenance events from March 2013 through August 2014, 22% of 396 water samples collected exceeded the irrigation water quality guidelines (<126 MPN E. coli 100 mL-1) during canal maintenance. During summer months (July and August 2013-2014), E. coli concentrations in water samples commonly reached maximum values (>2419.6 MPN E. coli 100 mL-1), and these samples were more readily collected from unlined canal sampling sites. During winter and spring months, 80.8% of E. coli exceedances for unlined canals met guideline standards in less than 22 hours, while 19.2% of exceedances took longer (up to 48 hours) to return to acceptable levels; in lined sites, 63.6% and 36.4% met guidelines in less than 22 hours and 48 hours, respectively. Summer months showed a different trend: in unlined canal sites, 56.3% of E. coli exceedances met standards within 22 hours and 43.7% within 48 hours; in lined sites, 100% of water samples met standards in less than 22 hours. Unlined sites averaged higher temperatures overall compared to lined sites, and canal water in July (2013) was extremely warm (averaging 32.8°C) and reached human body temperature (37°C) at several unlined sites, a temperature at which enteric bacteria are known to thrive. Culturable Salmonella were detected in water samples collected in summer, with 22.2% of Salmonella-positive samples within 1°C of human body temperature. E. coli concentrations were significantly correlated with temperature and pH in unlined canals only. Unlined canals showed 15.2% of water samples were Salmonella-positive during summer maintenance whereas 1.7% of lined canals were positive. Salmonella significantly correlated with pH in lined canals. Fecal indicators (E. coli) did not predict pathogen (Salmonella) presence. Molecular methods (qPCR) suggested far higher levels of Salmonella when compared to cultural methods, with molecular markers for Salmonella exceeding culturing by more than 600%. The results of this work suggest that growers should exercise caution when irrigating after canal maintenance events, and to be completely certain of acceptable irrigation water quality, should wait for 48 hours following the onset of maintenance (typically 24 hours following the re-introduction of water to the channels) prior to irrigating crops. Further, irrigation district guidelines may consider: 1) disposing of the“first flush”of canal water following maintenance into nearby open areas, rather than sending poor-quality water into the irrigation canal system; 2) collect sediments and algae deposited on canal banks and transport to a secondary location to prevent precipitation runoff and re-introduction of bacteria-laden sediments to canals, and 3) consider the long-term costs and benefits of canal lining.

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Coltman, Kenna Maria. "Water table management effects on water quality: a soil column study". The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1195165287.

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Coltman, Kenna Marie. "Water table management effects on water quality : a soil column study /". Connect to resource, 1992. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195165287.

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Stobart, Michael David. "The chemistry of a new water-recirculation aquaculture system with emphasis on the influence of ozone on water quality". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005087.

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Water quality changes that occur during establishment and maintenance of nitrification in two identical recirculating aquaculture systems containing rainbow trout are described. The time taken for the nitrification process to become established was 40-45 days. Mortality of fish attributed to elevated nitrite concentrations were recorded during the initial conditioning phase of the systems. Un-ionised ammonia concentrations did not attain lethal levels during this period. Nitrate concentrations accumulated slowly throughout the study, while the pH and alkalinity of the water decreased with progressive nitrification. Levels of carbon dioxide, calcium, dissolved and suspended solids remained relatively stable until the carrying capacity of the systems was increased, upon which they increased rapidly and general water quality deteriorated. Permanently elevated concentrations of ammonia and nitrite served as an indication that the carrying capacity of the systems had been exceeded. The use of ozone as a water enhancement treatment in aquaculture systems during one- and six-hour applications was also considered in this study. Ozonation significantly reduced nitrite levels at · low concentrations (0,1 - 0,15 mg/l), although they returned to pre-treatment levels within a few hours of cessation of the treatment. The formation of an unstable, intermediate product that reforms as nitrite in the absence of ozone, rather than the complete oxidation of nitrite to nitrate, is proposed. Ozonation also resulted in decreased dissolved solids, and improved the clarity and odour of the water. Ozone had no effect on ammonia concentrations (at pH > 7,0), or on nitrate or calcium levels, and did not conclusively increase the redox potential of the water. Residual ozone concentrations up to 0,04 mg/l in a sixhour treatment had no harmful effects on rainbow trout, and there were no signs of gas-bubble disease arising from supersaturation of the water with oxygen. Activated carbon filters were effective at removing residual ozone from the water after treatment. Treatment of the water with oxygen alone had no effect on nitrite concentrations.

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Libros sobre el tema "Effect of water quality on"

Zdeňka, Svobodová, Food and Agriculture Organization of the United Nations. y European Inland Fisheries Advisory Commission., eds. Water quality and fish health. Rome: Food and Agriculture Organization of the United Nations, 1993.

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T, O'Connor John. The effect of lower turbidity on distribution system water quality. Denver, CO: AWWA Research Foundation and American Water Works Association, 1993.

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Mitchell, P. Effect of Field Lake outflow on water quality in Red Deer Brook. [Edmonton]: Alberta Environment, Natural Resources Service, Water Management Division, Water Sciences Branch, 2000.

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Centre for Water Resources Development and Management (Calicut, India) y Kerala (India). State Committee on Science, Technology, and Environment., eds. Effect of industrial effluents on groundwater quality: Final report. Kozhikode, Kerala: Centre for Water Resources Development and Management, 1999.

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J. F. de L. G Solbé. Water quality for salmon and trout. Pitlochry: Atlantic Salmon Trust, 1997.

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E, Brune David, Tomasso Joseph R y International Symposium on Water Quality and Aquaculture (1st : 1989 : Los Angeles, Calif.), eds. Aquaculture and water quality. Baton Rouge, LA: World Aquaculture Society, 1991.

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Kirby, M. K. Effect of waste discharges on the water quality of Nipigon Bay, Lake Superior, 1983. [Toronto]: Queen's Printer for Ontario, 1986.

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Hauer, F. Richard. The effect of timber management on stream water quality. Kalispell, Mont. (723 5th Ave. E., Kalispell 59901): Flathead Basin Commission, 1991.

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Directorate, Canada Inland Waters. Chemistry of wetlands and their effect on receiving waters in Kejimkujik National Park, Nova Scotia. [Ottawa]: Supply and Services, 1991.

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Swistock, Bryan R. Drinking water quality in rural Pennsylvania and the effect of management practices. Harrisburg, Pa: Center for Rural Pennsylvania, 2009.

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Capítulos de libros sobre el tema "Effect of water quality on"

Rubin, H., K. Rathfelder, L. M. Abriola, M. Spiller, G. Demny y J. Köngeter. "The Effect of Fractures on the Reclamation of NAPL Contaminated Aquifers". En Water Resources Quality, 54–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56013-2_4.

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Roshni, Thendiyath, Kumar Suraj, Madan K. Jha y Ram Pravesh Sah. "Effect of Rainfall on Groundwater Levels in Sina Basin, Maharashtra". En Groundwater and Water Quality, 241–52. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09551-1_18.

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Panda, Subhabrata. "Effect of Soil on Water Quality". En SpringerBriefs in Molecular Science, 53–64. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15405-8_4.

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Gopikrishna, B. S. y Pranab K. Mohapatra. "Effect of Indira Sagar Dam on the Health Assessment of Narmada River". En Groundwater and Water Quality, 105–18. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09551-1_8.

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Morton, Lois Wright y Susan S. Brown. "Pathways to Better Water Quality". En Pathways for Getting to Better Water Quality: The Citizen Effect, 3–14. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7282-8_1.

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Anthony, Mark y Glenn Drummond. "Reservoir Water Quality Control". En Man-Made Lakes: Their Problems and Environmental Effects, 549–51. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm017p0549.

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Hu, Zhihua y Lois Wright Morton. "Regional Water Quality Concern and Environmental Attitudes". En Pathways for Getting to Better Water Quality: The Citizen Effect, 95–107. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7282-8_8.

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Nasir, Norazlina Abdul, Abdul Rauf Abdullah, Hanisah Johor, Asmalina Mohamed Saat, Fatin Zawani Zainal Azaim y Muhammad Amir Hussein. "The Water Quality Index: Effect of Antifouling Paint". En Advanced Structured Materials, 23–31. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-56844-2_3.

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Bersillon, Jean-Luc, Bruno Lartiges, Fabien Thomas y Laurent Michot. "The Transformation of Water Quality: from Soil Contribution to Water Treatment". En Effect of Mineral-Organic-Microorganism Interactions on Soil and Freshwater Environments, 367–73. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4683-2_40.

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Filippini, Giacomo, Flavio Manenti y Iqbal M. Mujtaba. "Interaction of Energy Consumption, Energy Quality, and Freshwater Production in the Multiple Effect Desalination Process". En Water Management, 537–64. First editor. | Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019] | Series: Green chemistry and chemical engineering: CRC Press, 2018. http://dx.doi.org/10.1201/b22241-30.

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Actas de conferencias sobre el tema "Effect of water quality on"

Li, Z., N. Yamasaki y K. Ioku. "Effect of Dry Steam on Nature and Quality of Selected Characteristic Organic Chemicals". En WATER DYANMICS: 4th International Workshop on Water Dynamics. AIP, 2007. http://dx.doi.org/10.1063/1.2721281.

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Wu, Xuehui, Li Li, Qiaohua Kou, Anxun Liu y Zongwen Liao. "Effect of Nanomaterial on Improvement of Water Quality". En 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517554.

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Alheboos, Sonia. "EFFECT OF THE WATER QUALITY ON CHLORINE DECAY IN WATER DISTRIBUTION NETWORKS". En 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b52/s20.024.

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Cheng, Yuan. "Long Term Effect of a Stream Restoration Plan on Water Quality". En World Environmental and Water Resources Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41036(342)604.

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Torabian, A., A. Hesam Hasani y A. R. Mehrabadi. "Effect of physical and chemical parameters on water treatment plant effluent quality (particle count and particle size)". En WATER POLLUTION 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/wp080471.

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B. Kaufmann, Dorsey, Nima Hamidi, Kunal Palawat y Monica Ramirez-Andreotta. "Ripple Effect: Communicating Water Quality Data through Sonic Vibrations". En C&C '21: Creativity and Cognition. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3450741.3464947.

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Zhu, Guangcan, Guangyu Zhao, Zhaohui Zhang y Xiwu Lu. "Water quality of water source area in Taihu Lake and effect on water treatment process". En 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5769325.

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Barkdoll, Brian D. y Harikrishna Didigam. "Effect of User Demand on Water Quality and Hydraulics of Distribution Systems". En World Water and Environmental Resources Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40685(2003)256.

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M. Reza Savabi, D. Shinde, K. Konomi, P. Nkedi-Kizza y K. Jayachandran. "Effect of soil amendments (composts) on water balance and water quality- Model Simulations". En 2003, Las Vegas, NV July 27-30, 2003. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.13802.

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Ding, Tao, Chunyan Su y Xiaojian Pan. "Effect of Sudden Water Pollution Accident on Water Quality of the Jinhua River". En 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/iccahe-16.2016.26.

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Informes sobre el tema "Effect of water quality on"

Brown, Thomas C. y Dan Binkley. Effect of management on water quality in North American forests. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1994. http://dx.doi.org/10.2737/rm-gtr-248.

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KHANDAKER, NADIM R. y PATRICK V. BRADY. Arsenic Removal Technologies and the Effect of Source Water Quality on Performance. Office of Scientific and Technical Information (OSTI), julio de 2002. http://dx.doi.org/10.2172/801398.

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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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Kelly Bitner, Bruce Gallaher y Ken Mullen. Review of Wildfire Effects on Chemical Water Quality. Office of Scientific and Technical Information (OSTI), mayo de 2001. http://dx.doi.org/10.2172/781455.

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Dougherty, Brian, Carl Pederson, Michelle Soupir y Dan Andersen. Drainage Water Quality Impacts of Agricultural Management Practices: Effect of Manure Application Timing and Cover Crops. Ames: Iowa State University, Digital Repository, 2018. http://dx.doi.org/10.31274/farmprogressreports-180814-1989.

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Bradford, Joe, Itzhak Shainberg y Lloyd Norton. Effect of Soil Properties and Water Quality on Concentrated Flow Erosion (Rills, Ephermal Gullies and Pipes). United States Department of Agriculture, noviembre de 1996. http://dx.doi.org/10.32747/1996.7613040.bard.

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Concentrated flow erosion in rills, pipes, ephermal gullies, and gullies is a major contributor of downstream sedimentation. When rill or gullies form in a landscape, a 3- to 5-fold increase in soil loss commonly occurs. The balance between the erosive power of the flow and the erosion resistance of the bed material determines the rate of concentrated flow erosion. The resistance of the bed material to detachment depends primarily on the magnitude of the interparticle forces or cohesion holding the particles and aggregates together. The effect of soil properties on bed material resistance and concentrated flow erosion was evaluated both in the laboratory and field. Both rill erodibility and critical hydraulic shear were greater when measured in 9.0 m long rills under field conditions compared with laboratory mini-flumes. A greater hydraulic shear was required to initiate erosion in the field compared to the mini-flume because of the greater aggregate and clod size and stability. Once erosion was initiated, however, the rate of erosion as a function of hydraulic shear was greater under field conditions because of the greater potential for slaking upon wetting and the greater soil surface area exposed to hydraulic shear. Erosion tests under controlled laboratory conditions with the mini-flume allowed individual soil variables to be studied. Attempts to relate rill erosion to a group soil properties had limited success. When individual soil properties were isolated and studied separately or grouped separately, some trends were identified. For example, the effect of organic carbon on rill erodibility was high in kaolinitic soils, low in smectitic soils, and intermediate in the soils dominated by illite. Slow prewetting and aging increased the cohesion forces between soil particles and decreased rill erodibility. Quick prewetting increased aggregate slaking and increased erodibility. The magnitude of the effect of aging depended upon soil type. The effect of clay mineralogy was evaluated on sand/clay mixtures with montmorillonite (M), Illite (I), and kaolinite (K) clays. Montmorillonite/sand mixtures were much less erodible than either illite or kaolonite sand mixtures. Na-I and Na-K sand mixtures were more erodible than Ca-I and Ca-K due to increased strength from ionic bonding and suppression of repulsive charges by Ca. Na-M was less erodiblethan Ca-M due to increased surface resulting from the accessibility of internal surfaces due to Na saturation. Erodibility decreased when salt concentration was high enough to cause flocculation. This occurred between 0.001 mole L-1 and 0.01 mole L-1. Measuring rill erodibility in mini-flumes enables the measurement of cohesive forces between particles and enhances our ability to learn more about cohesive forces resisting soil detachment under concentrated water flow.

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Jaramillo, Miguel y Lorena Alcázar. Does Participatory Budgeting have an Effect on the Quality of Public Services?: The Case of Peru's Water and Sanitation Sector. Inter-American Development Bank, marzo de 2013. http://dx.doi.org/10.18235/0011447.

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Since 2004 the government of Peru has implemented a process of participatory budgeting (PB), which is mandatory for every sub-national government. We analyze the link from PB to coverage and water service quality indicators. We find no statistically significant relationship between PB and our measures of coverage and service continuity, regardless of whether the outcome variables are measured in levels or in changes. Qualitative evidence collected in a sample of municipalities is consistent with this result. Further, PB in the water sector may also lead to inequitable outcomes as the poor may confront greater costs of participation. At the root of this lack of connection we find weaknesses both in the PB process itself as well as among the different actors in the process: citizens, municipalities and water service providers.

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Dammeyer, Nathan, Jarrett Wansley y Jeb Wofford. Status and trends of water quality in the Mid-Atlantic Inventory and Monitoring Network, water years 2011?2023. National Park Service, 2024. http://dx.doi.org/10.36967/2303698.

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The Mid-Atlantic Inventory and Monitoring Network (MIDN) monitors water quality due to the ecological, management, and policy significance of aquatic resources in MIDN parks. Specifically, water quality is monitored due to the direct effect it has on aquatic communities, the National Park Service?s responsibilities for the protection and improvement of water quality, and the clear connection to state-based regulatory programs. Here we provide a summary report on the status and trends in ?core? water quality parameters as defined by the National Park Service (i.e., pH, dissolved oxygen, water temperature, and specific conductivity). We include data from discrete monthly or quarterly observations for water years 2011 to 2023 at 47 sites distributed across eight MIDN parks. Overall, the status of water quality at most sites met state standards for the parameters monitored. Where water quality observations deviated from state standards, this was often due to natural conditions in the associated watershed such as underlying acidic soils or beaver activity. Out of 141 site-parameter combinations, only 10 showed more than 10% of observations outside state standards. And, of these 10, only three are believed to be associated with anthropogenic activity. In those few locations, upstream agricultural use or development is negatively impacting water quality. In terms of trend, significant trends in water quality parameters were rare across the network, and when present, were relatively small. Even though current monitoring suggests relatively good water quality across the MIDN, these conclusions are based on discrete monthly or quarterly samples, and it is possible that field observations during other times of the day would reveal additional water quality issues given large diel changes in water quality in some streams. Although state water quality standards were generally met for the observed ?core? parameters, it is important to note that these parameters represent a small portion of the many factors necessary for healthy stream ecosystems. Traits such as quality substrate, habitat complexity, good riparian condition, and other water quality criteria (e.g., nutrients and heavy metals) are also important. A more complete understanding of stream ecosystem health must include other components such as biological and physical habitat assessments.

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Weissinger, Rebecca. Trends in water quality at Bryce Canyon National Park, water years 2006–2021. Editado por Alice Wondrak Biel. National Park Service, noviembre de 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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Tsur, Yacov, David Zilberman, Uri Shani, Amos Zemel y David Sunding. Dynamic intraseasonal irrigation management under water scarcity, water quality, irrigation technology and environmental constraints. United States Department of Agriculture, marzo de 2007. http://dx.doi.org/10.32747/2007.7696507.bard.

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In this project we studied optimal use and adoption of sophisticated irrigation technologies. The stated objectives in the original proposal were to develop a conceptual framework for analyzing intra-season timing of water application rates with implications for crop and irrigation technology selection. We proposed to base the analysis on an intra-seasonal, dynamic, agro-economic model of plants' water demand, paying special attention to contamination of groundwater and soil in intensively cultivated areas that increasingly rely on water of lesser quality. The framework developed in the project integrates (i) a bio-physical model of water flow in the vadose zone and water uptake by plants and yield response with (ii) a dynamic management model to determine the optimal intra-season irrigation policy. It consists of a dynamic optimization model to determine irrigation rates at each point of time during the growing season and aggregation relating harvested yield with accumulated water input. The detailed dynamic approach provides a description of yield production processes at the plant’s level, and serves to determine intra-season irrigation decisions. Data derived from extensive field experiments were used to calibrate the model's parameters. We use the framework to establish the substitution between irrigation technology (capital) and water inputs; this is an important property of irrigation water productivity that has been overlooked in the literature. Another important feature investigated is the possibility to substitute fresh and saline water with a minimal productivity loss. The effects of soil properties and crop characteristics on optimal technology adoption have also been studied. We find that sandy soil, with low water holding capacity, is more conducive to adoption of sophisticated drip irrigation, as compared to heavier soils in which drainage losses are significantly smaller.

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