Gotowe bibliografie tematyczne / Nutrient pollution of water

Gotowa bibliografia na temat „Nutrient pollution of water”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 lipca 2024

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Spis treści

Artykuły w czasopismach
Rozprawy doktorskie
Książki
Części książek
Streszczenia konferencji
Raporty organizacyjne

Zobacz listy aktualnych artykułów, książek, rozpraw, streszczeń i innych źródeł naukowych na temat „Nutrient pollution of water”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Artykuły w czasopismach na temat "Nutrient pollution of water"

Zhao, Haiping, Qingxue Li i Jianhua Tao. "Spatio-temporal patterns and source identification of surface water pollution in Bohai Bay, China from 1995 to 2005". World Journal of Engineering 11, nr 6 (1.12.2014): 605–12. http://dx.doi.org/10.1260/1708-5284.11.6.605.

Pełny tekst źródła

Streszczenie:

Several multivariate statistical methods were comprehensively used to interpret the temporal, spatial patterns and source identification of surface water pollution in Bohai Bay with the large and complex data. Twelve variables water quality indices were surveyed at 12 sites three times a year (May, August, and October) from 1995 to 2005. Cluster analysis (CA) grouped the eleven years into two clusters, Cluster A (1995 to 2001 except 1998) and cluster B (2002 to 2005 and 1998), and spatial CA divided the entire area into three groups. The results of discriminant analysis showed that the temporal CA and spatial CA were effective with 90% and 83.3% correct assignments, respectively. In cluster A, the pollution sources mainly were nutrient factor from non-point source and Hg pollution, oil and organic pollutions were relatively light. In Cluster B, the organic pollution became the mainly pollution source, and the nutrient pollution was still serious problem. In the results of spatial analysis, the group 1 was mainly affected by anthropogenic pollution, the group 3 was seriously affected by oil spill pollution and nutrients pollution, and the group 2 reflected relatively strong water self-purification ability.

Style APA, Harvard, Vancouver, ISO itp.

Mladenović-Ranisavljević, Ivana, Milovan Vuković, Violeta Stefanović i Ljiljana Takić. "Multicriteria Decision Analysis of Sites with Increased Nutrient Contents in Water". Water 14, nr 23 (23.11.2022): 3810. http://dx.doi.org/10.3390/w14233810.

Pełny tekst źródła

Streszczenie:

Nutrient pollution represents an ongoing problem and a great challenge to water resources management around the world. Therefore, the aim of this paper is to contribute to the efforts of the water resources management in considering a problem of the nutrient pollution of water from a multicriteria decision-making point of view. The combined PROMETHEE and GAIA analysis in this paper included indicators of nutrients in the water (total nitrogen, nitrite, nitrate, ammonium ion, total phosphorus, and orthophosphates) to rank and evaluate significant sites along the Danube River flow through Serbia. Furthermore, the ecological quality status of the water was determined which places the Danube River into the category of “good” to “moderate” water quality. The results represent a detailed evaluation of the sites with increased nutrient content, associated with the most dominant parameters of nutrient indicators affecting water pollution at each site. The main sources of nonpoint pollution are of anthropogenic origin reflected in agricultural applications of pesticides and fertilizers, together with natural contamination of ground and water sources, while pollution from point sources arises from industrial waste waters as well as from domestic activities. Minimizing the application of fertilizers and pesticides is a way to control pollution from agricultural activities while, at the same time, a proper wastewater treatment is needed to reduce point sources, although financial aspects and lack of funds are limiting factors of this control in Serbia. Therefore, the findings in this paper could serve environmental scientists and water resources managers as a starting point in identifying key sources of nutrient pollution in water, as well as industry experts and national authorities in expanding strategies and taking long-term measures to reduce the input of nutrients into the valuable Danube River.

Style APA, Harvard, Vancouver, ISO itp.

Beasley, E. L., M. A. Hiller i R. B. Biggs. "Susceptibility of U.S. Estuaries to Pollution". Water Science and Technology 20, nr 6-7 (1.06.1988): 211–19. http://dx.doi.org/10.2166/wst.1988.0205.

Pełny tekst źródła

Streszczenie:

Utilizing data primarily from the U.S. Department of Commerce, both estuaries and watersheds for 78 U.S. systems are analyzed. Watersheds are classified according to total population and discrete subpopulations. The Vollenweider approach, which compares hydraulic loading to nutrient loading of lakes, is adapted to estuaries. By considering total population as a surrogate of point source nutrients, agricultural workers as a surrogate of non-point source toxics and nutrients and chemical + metal workers as a surrogate of point source toxics, we can estimate potential anthropogenic impacts on watersheds. When these surrogates are plotted against hydraulic loading, managers have a tool to identify estuaries most likely to be under greatest anthropogenic presaure. The estuaries with highest susceptibility from total population, as well as the estuaries with the the highest susceptibility to toxic stress, are identified. On a Vollenweider diagram, the phosphorous loadings of freshwater bodies are plotted as a function of hydraulic loading. The permissible-excessive phosphorous loadings have been both theoretically and empirically determined. We have replotted the freshwater data and added 33 U.S. estuary P loadings that were previously unavailable. Estuaries plot on the Vollenweider diagram as a continuum of fresh waterbodies, both in terms of hydraulic loading and phosphorus loading. Most estuaries appear to have permissible P loadings. Analysis of nutrient loading (normalized to hydraulic loading) versus water quality parameters like chlorophyll a indicates that estuaries are more efficient users of nutrients than are freshwater bodies, and that they reach a “nutrient saturation point”. Perhaps this is due to grazing or turbidity. It appears that, in general, the OECD eutrophication modeling approach is applicable to estuarine systems as well as lakes and impoundments.

Style APA, Harvard, Vancouver, ISO itp.

Kronvang, Brian, Frank Wendland, Karel Kovar i Dico Fraters. "Land Use and Water Quality". Water 12, nr 9 (28.08.2020): 2412. http://dx.doi.org/10.3390/w12092412.

Pełny tekst źródła

Streszczenie:

The interaction between land use and water quality is of great importance worldwide as agriculture has been proven to exert a huge pressure on the quality of groundwater and surface waters due to excess losses of nutrients (nitrogen and phosphorous) through leaching and erosion processes. These losses result in, inter alia, high nitrate concentrations in groundwater and eutrophication of rivers, lakes and coastal waters. Combatting especially non-point losses of nutrients has been a hot topic for river basin managers worldwide, and new important mitigation measures to reduce the input of nutrients into groundwater and surface waters at the pollution source have been developed and implemented in many countries. This Special Issue of the Land use and Water Quality conference series (LuWQ) includes a total of 11 papers covering topics such as: (i) nitrogen surplus; (ii) protection of groundwater from pollution; (iii) nutrient sources of pollution and dynamics in catchments and (iv) new technologies for monitoring, mapping and analysing water quality.

Style APA, Harvard, Vancouver, ISO itp.

Yan, Jing, Nathaniel A. Bogie i Teamrat A. Ghezzehei. "Root uptake under mismatched distributions of water and nutrients in the root zone". Biogeosciences 17, nr 24 (17.12.2020): 6377–92. http://dx.doi.org/10.5194/bg-17-6377-2020.

Pełny tekst źródła

Streszczenie:

Abstract. Most plants derive their water and nutrient needs from soils where the resources are often scarce, patchy, and ephemeral. It is not uncommon for plant roots to encounter mismatched patches of water-rich and nutrient-rich regions in natural environments. Such an uneven distribution of resources necessitates plant reliance on strategies for exploring and acquiring nutrients from relatively dry patches. We conducted a laboratory study that elucidates the biophysical mechanisms that enable this adaptation. The roots of tomato (Solanum lycopersicum) seedlings were laterally split and grown in two adjacent, hydraulically disconnected pots, which permitted precise control of water and nutrient applications to each compartment. We observed that the physical separation of water-rich and nutrient-rich compartments (one received 90 % water and 0 % nutrients and the other received 10 % water and 100 % nutrients) does not significantly stunt plant growth and productivity compared to two control treatments (control 1: 90 % water and 100 % nutrients versus 10 % water and 0 % nutrients; control 2: 50 % water and 50 % nutrients in each compartment). Specifically, we showed that soil dryness does not reduce nutrient uptake, vegetative growth, flowering, and fruiting compared to control treatments. We identified localized root proliferation in nutrient-rich dry soil patches as a critical strategy that enabled nutrient capture. We observed nocturnal rewetting of the nutrient-rich but dry soil zone (10 % water and 100 % nutrients) but not in the nutrient-free and dry zone of the control experiment (90 % water and 100 % nutrients). We interpreted the rewetting as the transfer of water from the wet to dry zones through roots, a process commonly known as hydraulic redistribution (HR). The occurrence of HR likely prevents the nutrient-rich soil from drying due to permanent wilting and the subsequent decline of root functions. Sustaining rhizosphere wetness is also likely to increase nutrient mobility and uptake. Lack of HR in the absence of nutrients suggests that HR is not entirely a passive, water-potential-gradient driven flow. The density and size of root hairs appeared to be higher (qualitative observation) in the nutrient-rich and dry compartments than in the nutrient-free and dry compartments. We also observed organic coating on sand grains in the rhizosphere of the nutrient-rich and dry compartments. The observations are consistent with prior observations that root hairs and rhizodeposition aid rhizosphere wetting. These findings were synthesized in a conceptual model that explains how plants of dry regions may be adapted to mismatched resources. This study also suggests that separating the bulk of applied nutrients from the frequently irrigated soil region can increase nutrient use efficiency and curtail water pollution from intensive agricultural systems.

Style APA, Harvard, Vancouver, ISO itp.

PUCKETT, LARRY J. "Identifying the Major Sources of Nutrient Water Pollution". Environmental Science & Technology 29, nr 9 (wrzesień 1995): 408A—414A. http://dx.doi.org/10.1021/es00009a743.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Randall, C. W. "The environmental, economic and societal consequences of inadequate nitrogen pollution controls". Water Science and Technology 49, nr 5-6 (1.03.2004): 23–33. http://dx.doi.org/10.2166/wst.2004.0733.

Pełny tekst źródła

Streszczenie:

Because adequate nutrient controls were not established in the USA and other countries when there were past opportunities to do so, nutrient pollution of estuaries and coastal waters has resulted in the impairment of ecosystems and major reductions or collapse of fisheries at numerous sites around the world, resulting in major economic and societal impacts. The root problem is that political policies and processes have permitted municipalities, developers, industries and farmers to expand and operate without paying the full cost of their activities. Their expanded activities have occurred at the expense and displacement of those who rely on the productivity and recreational value of our estuarine and coastal waters. Some governments have developed remedial nutrient control programs, but most of them have been poorly conceived, under funded and inadequately enforced, resulting in small increments of progress that tend to be lost because of inadequate land use and immigration controls. It is proposed that establishment of comprehensive nutrient controls is needed throughout the world to preserve and protect estuarine and coastal waters, and to protect or re-establish fisheries, for both economic and societal stability. Nitrogen is the key nutrient for the establishment of control strategies. It is recommended that nutrient recovery from wastewaters and controlled reuse of both water and nutrients be widely implemented as a part of nutrient control strategies.

Style APA, Harvard, Vancouver, ISO itp.

Moss, Brian. "Water pollution by agriculture". Philosophical Transactions of the Royal Society B: Biological Sciences 363, nr 1491 (30.07.2007): 659–66. http://dx.doi.org/10.1098/rstb.2007.2176.

Pełny tekst źródła

Streszczenie:

Agriculture disrupts all freshwater systems hugely from their pristine states. The former reductionist concept of pollution was of examining individual effects of particular substances on individual taxa or sub-communities in freshwater systems, an essentially ecotoxicological concept. It is now less useful than a more holistic approach that treats the impacts on the system as a whole and includes physical impacts such as drainage and physical modification of river channels and modification of the catchment as well as nutrient, particulate and biocide pollution. The European Water Framework Directive implicitly recognizes this in requiring restoration of water bodies to ‘good ecological quality’, which is defined as only slightly different from pristine state. The implications for the management of agriculture are far more profound than is currently widely realized.

Style APA, Harvard, Vancouver, ISO itp.

de Lima Barros, Alessandra Maciel, Maria do Carmo Sobral i Günter Gunkel. "Modelling of point and diffuse pollution: application of the Moneris model in the Ipojuca river basin, Pernambuco State, Brazil". Water Science and Technology 68, nr 2 (1.07.2013): 357–65. http://dx.doi.org/10.2166/wst.2013.086.

Pełny tekst źródła

Streszczenie:

Emissions of pollutants and nutrients are causing several problems in aquatic ecosystems, and in general an excess of nutrients, specifically nitrogen and phosphorus, is responsible for the eutrophication process in water bodies. In most developed countries, more attention is given to diffuse pollution because problems with point pollution have already been solved. In many non-developed countries basic data for point and diffuse pollution are not available. The focus of the presented studies is to quantify nutrient emissions from point and diffuse sources in the Ipojuca river basin, Pernambuco State, Brazil, using the Moneris model (Modelling Nutrient Emissions in River Systems). This model has been developed in Germany and has already been implemented in more than 600 river basins. The model is mainly based on river flow, water quality and geographical information system data. According to the Moneris model results, untreated domestic sewage is the major source of nutrients in the Ipojuca river basin. The Moneris model has shown itself to be a useful tool that allows the identification and quantification of point and diffuse nutrient sources, thus enabling the adoption of measures to reduce them. The Moneris model, conducted for the first time in a tropical river basin with intermittent flow, can be used as a reference for implementation in other watersheds.

Style APA, Harvard, Vancouver, ISO itp.

Zeng, Chun Fen, La Chun Wang, Wen Yu Huang i Wei Wang. "Research on Influencing Factors of Water Environment in the Typical Western of Taihu Lake Based on the Principal Component Analysis - A Case Study of Tianmuhu Lake and Gehu Lake in Jiangsu Province". Advanced Materials Research 356-360 (październik 2011): 924–28. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.924.

Pełny tekst źródła

Streszczenie:

Taihu Lake basin is a typical water shortage area for water quality problem in China. Studying the influencing water environment factors in this area provides a scientific basis to propose effective pollution water control. This article selects lakes in the western basin as the study area which has the largest contribution to the pollution in Taihu Lake. Influencing factors of water pollution of Tianmuhu Lake and Gehu Lake have been analyzed based on principal component analysis of SPSS, to study the major influencing factors of water environment. The results show that the major influencing factors of water environment in Taihu Lake is dissolved oxygen, water turbidity, and water N, P and other nutrient elements, and the water environment nutrients is much influenced by the N element. While the major influencing factors of water environment in Gehu Lake is P nutrition elements, physical and chemical factors and nutrients such as N and P element, and P elements are seriously polluted. Thus, the corresponding countermeasures should be forward according to different water characteristics during the process of water Pollution Control at the basin.

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Rozprawy doktorskie na temat "Nutrient pollution of water"

Butcher, Melissa Rachelle. "Diffuse Nutrient Pollution from Residential Catchments". Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5194.

Pełny tekst źródła

Streszczenie:

Nonpoint source nutrient pollution is diffuse pollution lacking discrete origin and conveyance. This thesis synthesizes and critically reviews research on residential nitrogen and phosphorus loss to stormwater runoff and leaching. The evaluation pulls from research covering influential socio-demographic indicators, such as use of lawn maintenance services and homeowner fertilizer practices. The extent to which such social and economic factors may influence the prevalence and fate of diffuse nutrients in stormwater runoff from residential areas has not been adequately established. Understanding the source and influencing factors of diffuse nutrient pollution is important in order to effectively protect surface and groundwater resources. Research based on sampling campaigns of catchments, sampling of controlled turf systems and models of residential catchments were compiled for this review. Based on the compilation reviewed for this thesis, there are wide differences in approaches researchers have taken to attempt to quantify and understand diffuse nutrient pollution from residential and urban areas. There is not consistency in the chemical nitrogen or phosphorus species evaluated or in reported measurements (i.e. concentration vs. loading vs. yield). This review revealed several important knowledge gaps. Determination of correlation between residential system nutrient loss to the environment and social factors, demographic characteristics, local fertilizer ordinances or nutrient management education programs has not been substantiated. More exploration of nutrient leaching from different soil types and turf grass species is needed to develop a complete understanding of nutrient loss from turf grass systems. Further, other specific management practices such as leaving grass clippings on lawns has not been studied in depth for a variety of soil types and grass species. There is room for improvement in future research and additional studies are needed to guide future policy and implementation of best management practices. Based on these and other findings, I recommend a concerted effort to standardize a portion of the reporting details of future stormwater research and for reevaluation of nutrient/fertilizer education efforts.

Style APA, Harvard, Vancouver, ISO itp.

Fretwell, Elizabeth A. "The Temporal and Spatial Relationship between Phosphorus and Nitrogen Concentrations, Algal Growth, and Nutrient Sources in the Meduxnekeag River Watershed". Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/FretwellEA2006.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Hantsch, Nichole M. "Pattern and process of watershed nutrient dynamics in South Central New York". Diss., Online access via UMI:, 2008.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Mariola, Matthew J. "Are Markets the Solution to Water Pollution? A Sociological Investigation of Water Quality Trading". Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1250015222.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Sanyi, Hassan H. A. R. "Effects of liming of upland soils on nutrient mobilities in relation to water quality". Thesis, University of Aberdeen, 1989. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU020937.

Pełny tekst źródła

Streszczenie:

The work in this thesis relates to understanding the potential effects of using surface liming of upland soils to ameliorate water acidification. Effects on vegetation, soil, and drainage water chemistry are considered. Part I of this thesis reviews the environmental conditions of British Uplands (climate, soils and vegetation), and the relevant literature on water acidification in North-East Scotland. In Part II, each chapter deals with materials, methods used, discussion of the results and conclusion for one of a series of individual experiments. This pattern is followed for a number of laboratory, greenhouse and field studies. Liming of different organic soils significantly increased only the surface layer pH of the soils. The consequence of surface liming should be highly beneficial in terms of water quality, since most of the precipitation in the catchment under consideration (Glendye) during heavy storms, when river acid episodes occur, drains near or over the surface. The effect of lime on pH below the surface should be considered after a year or more. Liming on the other hand increased the mineralisation of organic N and released NH4+ and NO3-. The balance between N mineralization and immobilization by vegetation and microbial biomass should be considered carefully for each individual soil and site. If the mobile NO3- reaches the river or streams and increases the NO3- to beyond an acceptable limit, this could be considered an adverse effect of liming. Although within the timescale of this project there was no adverse effect noticed on the heather under field conditions, the long term effects should be considered carefully in terms of changing vegetation pattern as a result of liming, which will favour growth of grass.

Style APA, Harvard, Vancouver, ISO itp.

Shamblin, Michael D. "Evaluating runoff water quality and ammonia volatilization in three turkey litter application methods". Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2668.

Pełny tekst źródła

Streszczenie:

Thesis (M.S.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains vii, 59 p. : ill. Includes abstract. Includes bibliographical references (p. 43-45).

Style APA, Harvard, Vancouver, ISO itp.

Klaewtanong, Wimalin. "Nutrient removal in anaerobic sequencing batch reactor combined with anaerobic/aerobic sequencing batch reactor for piggery wastewater treatment". Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289241.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Ross, Sarah Ysabel. "Relationships between hydrology, hydrochemistry and vegetation patterning on Scottish fens". Thesis, University of Stirling, 1999. http://hdl.handle.net/1893/24825.

Pełny tekst źródła

Streszczenie:

Fens are increasingly recognised as important habitats in terms of biodiversity, and this has been formalised in recent legislation (EC Habitats Directive, 92/43/EEC). The influence of groundwater and surface water inputs on the fen habitat increases its vulnerability to water pollution, particularly from nutrients. Despite the conservation importance and potential vulnerability of the habitat, fens have not been widely studied in Scotland, in terms of extent, location, sensitivity to increased nutrient inputs, or in comparison to similar European sites. This study found that fens were widespread throughout mainland Scotland, and that basin fens were the most commonly occurring fen type, representing 43% of the 355 sites assessed. A survey of 18 basin fens found that 72% were potentially vulnerable to elevated nutrient inputs, being surrounded by improved/modified land. Despite this, only four sites showed greater nutrient concentrations in sub-surface water samples or water inputs. There was, however, a significant amount of variation in hydrochemistry between the sites. Detailed studies further assessed spatial and temporal variations in hydrochemistry, and associated hydrologic regimes on two similar basin fens, one in an agricultural catchment, the other surrounded by unimproved grassland. Spatial patterning of vegetation was associated with both base-richness and nutrient concentrations of subsurface water, and the frequency of water inundation. General relationships between the six fen vegetation types and the observed hydrological and hydrochemical variation were presented.

Style APA, Harvard, Vancouver, ISO itp.

Lang, David A. King Ryan Steven. "Effects of nutrient enrichment on alkaline phosphatase activity and nitrogen fixation potential in stream periphyton". Waco, Tex. : Baylor University, 2007. http://hdl.handle.net/2104/5071.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Chaston, Katherine A. V. "Sediment nutrient bioavailability in a sub-tropical catchment dominated by agriculture : the transition from land to sea /". [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17118.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Książki na temat "Nutrient pollution of water"

Northeast National Technical Center (U.S.). Nutrient and sediment control system. Chester, Pa: U.S. Dept. of Agriculture, Natural Resources Conservation Service, NNTC, 1994.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Patton, Charles J. U.S. Geological Survey nutrient preservation experiment: Nutrient concentration data for surface-, ground-, and municipal-supply water samples and quality-assurance samples. Denver, Colo: U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

P, Truitt Earl, i Geological Survey (U.S.), red. U.S. Geological Survey nutrient preservation experiment: Nutrient concentration data for surface-, ground-, and municipal-supply water samples and quality-assurance samples. Denver, Colo: U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Ott, Arthur N. Nutrient loading status of the Conestoga River basin, 1985-1989. Harrisburg, PA (1721 N. Front St., Harrisburg 17102-2391): Susquehanna River Basin Commission, 1991.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Ott, Arthur N. Nutrient loading status of the Conestoga River basin, 1985-1989. Harrisburg, PA: Susquehanna River Basin Commission, 1990.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Inkpen, E. L. Nutrient transport in the major rivers and streams of the Puget Sound Basin, Washington. [Reston, Va.?: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Inkpen, E. L. Nutrient transport in the major rivers and streams of the Puget Sound Basin, Washington. [Reston, Va.?: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kent, Robert. Concentrations of dissolved solids and nutrients in water sources and selected streams of the Santa Ana Basin, California, October 1998-September 2001. Sacramento, Calif: U.S. Dept. of the Interior, U.S. Geological Survey, 2004.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Części książek na temat "Nutrient pollution of water"

Dervash, Moonisa Aslam, Abrar Yousuf, Munir Ozturk i Rouf Ahmad Bhat. "Monitoring of Nutrient Pollution in Water". W Phytosequestration, 75–82. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-26921-9_8.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Burn, D. H. "Water Quality Sampling for Nutrient Loading Estimation". W Water Pollution: Modelling, Measuring and Prediction, 505–17. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3694-5_36.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Devlin, Michelle, i Jon Brodie. "Nutrients and Eutrophication". W Springer Textbooks in Earth Sciences, Geography and Environment, 75–100. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-10127-4_4.

Pełny tekst źródła

Streszczenie:

AbstractExcess nutrientsfrom fertiliser application, pollution discharge and water regulations outflow through rivers from lands to oceans, seriously impact coastal ecosystems. Terrestrial runoff of waters polluted with nutrients (primarily nitrogen [N] and phosphorus [P] compounds) from point source/s, such as sewage treatment plant (STP) discharges, and diffuse sourcesvia river discharges, such as fertiliser losses, are having devastating adverse effects in coastal and marine ecosystems globally (Carpenter et al., Ecol Appl 8:559–568, 1998; Halpern et al., Science 319:948–952, 2008; Crain et al., Ecol Lett 11:1304–1315, 2008; Smith and Schindler, Trends Ecol Evol 24:201–207, 2009). The nutrients can be dissolved such as dissolved nitrate and Phosphate typically discharged from STPs or agricultural runoff or in a particulate form, often associated with soil erosion.

Style APA, Harvard, Vancouver, ISO itp.

Lubchenco, Jane, i Peter M. Haugan. "Leveraging Multi-target Strategies to Address Plastic Pollution in the Context of an Already Stressed Ocean". W The Blue Compendium, 141–84. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-16277-0_5.

Pełny tekst źródła

Streszczenie:

AbstractThe ocean is the ultimate sink for anthropogenic pollution. According to the HydroSHED model, over 80% of the land mass on Earth is in a watershed that drains directly to the ocean (Lehner and Grill 2013). Until recently, the ocean seemed to be endlessly able to absorb all the waste that human activity has discharged into it. The Ocean Health Index (OHI) scores the health of the ocean on a range of criteria, from how clean the water is to the ability of the ocean to continue providing services such as food provision, carbon storage, tourism and recreation, and biodiversity (Halpern et al. 2012). The 2019 combined global ocean score was 71 out of 100 (as it has been for the last five years), showing that significant impairment has occurred, but that many of the functions and services of the ocean remain and must be better managed (OHI 2019). The Clean Water section of the OHI includes details on the statuses and pressures of chemical, nutrient, pathogen and trash pollution. It also includes social pressure as a further pressure. Indicators of resilience were based upon the Convention on Biological Diversity (in particular for marine ecosystems) and quality of governance (using Worldwide Governance Indicators). The score for Clean Water has tracked closely to the overall score, remaining at 70 for the past five years (OHI 2019). With an estimated 91% of all temperate and tropical coasts predicted to be heavily developed by 2050 (Nellemann et al. 2008), this is a critical time to significantly reduce and prevent anthropogenic pollution to the ocean.

Style APA, Harvard, Vancouver, ISO itp.

Guong, Vo Thi, i Nguyen My Hoa. "Aquaculture and Agricultural Production in the Mekong Delta and its Effects on Nutrient Pollution of Soil and Water". W Springer Environmental Science and Engineering, 363–93. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3962-8_14.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Burkholder, JoAnn M. "Beyond Algal Blooms, Oxygen Deficits and Fish Kills: Chronic, Long-Term Impacts of Nutrient Pollution on Aquatic Ecosystems". W Waters in Peril, 103–25. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1493-0_7.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Rankenhohn, Florian, Tido Strauß i Paul Wermter. "Dianchi Shallow Lake Management". W Terrestrial Environmental Sciences, 69–102. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80234-9_3.

Pełny tekst źródła

Streszczenie:

AbstractLake Dianchi in the Chinese province Yunnan is a shallow lake suffering from algae blooms for years due to high pollution. We conducted a thorough survey of the water quality of the northern part of the lake called Caohai. This study was intended as the basis for the system understanding of the shallow lake of Caohai. The study consisted of two steps. First we collected available environmental, hydrological and pollution data from Kunming authorities and other sources. It was possible to parameterise a lake model model based on the preliminary data set. It supported first estimations of management scenarios. But the first and quick answers came with a relevant vagueness. Relevant monitoring data was still missing like P release from lake-internal sediment.Because data uncertainty causes model uncertainty and model uncertainty causes planning and management uncertainties, we recommended and conducted a thorough sediment and river pollution monitoring campaign in 2017. Examination of the sediment phosphorus release and additional measurements of N and P was crucial for the improvement of the shallow lake model of Caohai. In May 2018 we presented and discussed the results of StoLaM shallow lake model of Caohai and the outcomes of a set of management scenarios.The StoLaM shallow lake model for Caohai used in SINOWATER indicates that sediment dredging could contribute to the control of algae by limitation of phosphorus, but sediment management can only produce sustainable effects when the overall nutrient input and especially the phosphorus input from the inflows will be reduced significantly.

Style APA, Harvard, Vancouver, ISO itp.

Mukherjee, Swapna, Kaushik Kiran Ghosh i Abhra Chanda. "Nutrient Pollution". W Environmental Oceanography and Coastal Dynamics, 109–26. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34422-0_6.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Quadra, Gabrielle Rabelo, i Emília Marques Brovini. "Nutrient Pollution". W The Palgrave Handbook of Global Sustainability, 1–21. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-38948-2_60-1.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Quadra, Gabrielle Rabelo, i Emília Marques Brovini. "Nutrient Pollution". W The Palgrave Handbook of Global Sustainability, 873–93. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-01949-4_60.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Streszczenia konferencji na temat "Nutrient pollution of water"

Bilaletdin, Ä., H. Kaipainen i T. Frisk. "Dynamic nutrient modelling of a large river basin in Finland". W WATER POLLUTION 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/wp080061.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Fernández, F. J., J. Villaseñor i L. Rodríguez. "Effect of the start-up length on the biological nutrient removal process". W WATER POLLUTION 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/wp080511.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Marinov, A. M., i T. Petrovici. "Mathematical models for irrigation and nutrient management practices to improve nitrate pollution control". W WATER RESOURCES MANAGEMENT 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/wrm090181.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Tevi, Giuliano. "EFFECTS OF NUTRIENT POLLUTION ON GROUND WATER USED FOR DRINKING PURPOSES". W 14th SGEM GeoConference on WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b31/s12.029.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

RODRIGUEZ, NICOLE, TIMOTHY HO, ZHONGWEI SHI i JULIA LU. "NUTRIENTS IN MARGINAL LAND SOILS AND THEIR POTENTIAL EFFECT ON THE ENVIRONMENT". W AIR AND WATER POLLUTION 2022. Southampton UK: WIT Press, 2022. http://dx.doi.org/10.2495/awp220021.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Mogîldea, Vladimir, i Iurie Bejan. "Surse punctiforme semnificative de poluare cu nutrienți a râurilor mici din subbazinul hidrografic Raut". W Impactul antropic asupra calitatii mediului. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975330800.05.

Pełny tekst źródła

Streszczenie:

The research from surface waters allowed the assessment of the distribution of ammonium ions, nitrates and phosphates in different water bodies (Răut River and its tributaries r. Copăceanca, r. Cubolta, r. Căinari, r. Cogâlnic, r. Ciuluc, r. Vatici, r. Cula, ponds, wells, springs), the role of human agglomerations in the pollution of water bodies with nutrients, from punctual sources. In the Vatici basin area the quality of surface leakage caused by precipitation and their influence on the physico-chemical parameters of the river water, from the springs to the spill in Răut river, was investigated. Using the integrative indicator - Algae Growth Potential in Different Water Bodies – allowed differentiation between the total nutrient content (determined by chemical analysis) and the nutrients available for the growth of hydrobionds, and characterizing the trophic status of the water body.

Style APA, Harvard, Vancouver, ISO itp.

Veljanoska Sarafiloska, Elizabeta, Orhideja Tasevska, Lenče Lokoska, Suzana Patčeva i Jovica Lešoski. "INFLUENCE OF RIVERS ON WATER QUALITY IN THE LITTORAL ZONE OF LAKE PRESPA (R.MACEDONIA)". W 53rd Annual Conference of the Serbian Water Pollution Control Society. SERBIAN WATER POLLUTION CONTROL SOCIETY, 2024. http://dx.doi.org/10.46793/voda24.167vs.

Pełny tekst źródła

Streszczenie:

The aim of this work is to present the trophic state of water and nutrient loading at the littoral zone of Lake Prespa near the rivers and water quality of the rivers, reviewing the results of defined physical, chemical and biological parameters. The obtained results indicate an intense anthropogenic influence in the researched measuring points, with a special emphasis on the River Golema and the littoral where it flows into the lake. According to the numerical values for the trophic state index (TSI) based on the concentration of total phosphorus and chlorophyll a, the water in the littoral zone of Lake Prespa belongs to a mesotrophic state

Style APA, Harvard, Vancouver, ISO itp.

Bagdžiūnaitė-Litvinaitienė, Lina, Andrius Litvinaitis i Laurynas Šaučiūnas. "Influence of Anykščiai City on Šventoji River Water Quality". W Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.068.

Pełny tekst źródła

Streszczenie:

Increasing migration of nutrients in the river water is a major factor in determining the quality of river water due to anthropogenic activities. In order to preserve the good water quality in rivers and other surface water bodies, it is necessary to take preventive measures that can be scientific water quality research and analysis. According to research carried out in kind, the article analyses the Anykščiai city as point source pollution, and the influence of it to the water quality of Šventoji river. Also, based on the statistical information a nutrient concentrations trend analysis of the meteorological and hydrological con-ditions influence was carried out. Investigations were carried out in July-September of 2016. Concentrations of ammonium (NH4-N), nitrite (NO2-N), nitrate (NO3-N), phosphate (PO4-P) and dissolved oxygen (O2) was analysed. In order to determine the impact of point source pollution on river water quality, the changes in concentration before and beyond Anykščiai city were evaluated, according to the meteorological and hydrological conditions. It was found that total nitrogen (Nb) and total phos-phorus (Pb) concentrations during the investigation period respectively, increases in 6% and 8%.

Style APA, Harvard, Vancouver, ISO itp.

Zhang, Yachen, Lubo Liu, Jing Cao, Liqiang Yao i Zhaosheng Chu. "Impact of Point and Nonpoint Sources on Nutrient Levels and Algal Pollution in Lake Erhai in China". W World Environmental and Water Resources Congress 2019. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482346.009.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

MOSIEJ, Józef, i Agnieszka BUS. "NEW CHALLENGES IN RURAL WATER MANAGEMENT IN POLAND – SELECTED PROBLEMS". W Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.078.

Pełny tekst źródła

Streszczenie:

State of rural water resources and selected new challenges of water resources management in rural areas in Poland are presented Problems of influence small water reservoir for water quality is presented. It is commonly believed that every kind of reservoirs should collect and reduce the nutrient contamination (N, P, heavy metals). The presented results show that water reservoirs (both pre- and main reservoirs) are a source of water pollution. The reservoirs fed by waters of inadequate or poor quality are an additional source of contamination, which accelerates the process of eutrophication. However, as the literature shows, well-designed pre-reserviors of optimum size can remarkably reduce the phosphorus import into reservoirs and help to control eutrophication from non-point sources

Style APA, Harvard, Vancouver, ISO itp.

Raporty organizacyjne na temat "Nutrient pollution of water"

Lalovic, Ivan, Fernando Miralles-Wilhelm, Philipp Grötsch, Sara de Moitié, Adam Belmonte, Jihoon Lee, Raúl Muñoz Castillo i in. Remote Sensing Analysis of Water Quality in Four Waterbodies of Latin America. Redaktorzy Eveline Vasquez i José Rosales. Banco Interamericano de Desarrollo, styczeń 2024. http://dx.doi.org/10.18235/0005498.

Pełny tekst źródła

Streszczenie:

The pilot study introduces remote sensing methods for monitoring water quality to measure, understand, and manage impacts on vulnerable water bodies that are part of the IDBs Water and Sanitation portfolio. The water bodies selected for this study include: Guanabara Bay in Río de Janeiro, Brazil; Lake Titicaca in Bolivia and Peru; Ypacaraí Lake near Asunción, Paraguay; and the Río Reconquista Basin near Buenos Aires, Argentina. This study focuses on the development and implementation of an automated remote sensing data processing chain enabling detection of phytoplankton abundance (chlorophyll-a) as a proxy for pollution by organic and inorganic nutrients, as well as sediments (and turbidity or water clarity), which are the major water quality issues identified across the IDBs Water and Sanitation portfolio. In addition to providing a baseline assessment of water resources at four select locations over time, the collected remote sensing data will be used to rapidly assess changes in water quality conditions resulting from socioeconomic changes introduced by local and regional responses to the Covid-19 pandemic and associated lockdown conditions. Remote sensing applied to water quality monitoring is a valuable emerging technology that can provide geospatial data about water quality and nutrient, bacterial, and industrial pollution from urban and rural sources. The methodology presented in this paper uses cloud computing, which allows rapid monitoring deployment and scalable coverage across numerous watersheds and geographies. Although this paper presents a comprehensive analysis of this entirely new source of water quality data across the sites and locations of interest, a more detailed analysis can be performed by examining different timeframes (e.g., entire data set or monthly aggregates) within these watersheds. Additional insights may be revealed by further combining the water quality data sets of this work with other sources of information, including local sensors, information from water and sanitation utilities, and a more detailed analysis of the timing of location conditions and their local impacts.

Style APA, Harvard, Vancouver, ISO itp.

Weldon, James, i Carlotta Meriggi. Modelling the risks of invasive aquatic species spread in Swedish lakes. Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.r68r25qcb1.

Pełny tekst źródła

Streszczenie:

Species distribution modelling is a valuable tool for identifying areas most at risk of the spread of invasive species. Here we model the environmental factors governing the distributions of two invasive species of concern that are currently found in Sweden at only a limited number of locations: the aquatic macrophyte Elodea nuttallii (Nuttall’s waterweed / smal vattenpest) and the bivalve Dreissena polymorpha (Zebra mussel / vandrarmussla). For E.nuttallii, the greatest risk factors are connectivity with other water bodies (facilitating dispersion), human population density and length of growing season. This implies that it is principally well-connected lakes in populated areas of southern Sweden that are most at risk of further spread (although other areas of concern are identified). For D.polymorpha, water alkalinity and the proportion of agricultural land (a source of nutrient pollution) are the most important factors, and the models identify lakes Vänern and Vättern, waters in parts of Östergötland, Jämtland and Gotland as key areas of concern for further spread.

Style APA, Harvard, Vancouver, ISO itp.

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.

Pełny tekst źródła

Streszczenie:

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.

Style APA, Harvard, Vancouver, ISO itp.

Goswami, Omanjana, i Stacy Woods. Waste Deep: How Tyson Foods Pollutes US Waterways and Which States Bear the Brunt. Union of Concerned Scientists, kwiecień 2024. http://dx.doi.org/10.47923/2024.15384.

Pełny tekst źródła

Streszczenie:

Tyson Foods, the nation’s largest meat and poultry producer, released hundreds of millions of pounds of pollutants from its slaughterhouses and processing plants into local waterways across the United States between 2018 and 2022. Water pollutants from Tyson plants pose a risk to people and the environment and include large amounts of nitrogen and phosphorus. These nutrients feed algal blooms that clog water infrastructure, exacerbate asthma and other respiratory conditions, and contribute to dead zones that harm fish, shellfish, and people. Many of these facilities are also located close to federally defined critical habitats for endangered or threatened species. This analysis adds to a broader critique of Tyson Foods and the impact of this megacorporation on communities, consumers, farmers, and workers. Policymakers can reduce the damage Tyson causes by tightening wastewater pollution standards, better enforcing discharge limits, and cracking down on the corporate consolidation that enables Tyson’s excesses.

Style APA, Harvard, Vancouver, ISO itp.

Einarsson, Rasmus. Nitrogen in the food system. TABLE, luty 2024. http://dx.doi.org/10.56661/2fa45626.

Pełny tekst źródła

Streszczenie:

Nitrogen (N) plays a dual role in the agri-food system: it is an essential nutrient for all life forms, yet also an environmental pollutant causing a range of environmental and human health impacts. As the plant nutrient needed in greatest quantities, and as a building block of proteins and other biomolecules, N is a necessary part of all life. In the last century, an enormous increase of N turnover in the agri-food system has enabled increasing per-capita food supply for a growing world population, but as an unintended side effect, N pollution has increased to levels widely agreed in science and policy to be far beyond sustainable limits. There is no such thing as perfectly circular N supply. Losses of N to the environment inevitably arise as N is transformed and used in the food system, for example in soil processes, in manure storage, and in fertilizer application. This lost N must be replaced by ‘new’ N, which is N converted to bioavailable forms from the vast atmospheric pool of unreactive dinitrogen (N2). New N comes mainly as synthetic N fertilizer and through a process known as biological N fixation (BNF). In addition, there is a large internal flow of recycled N in the food system, mainly in the form of livestock excreta. This recirculated N, however, is internal to the food system and cannot make up for the inevitable losses of N. The introduction of synthetic N fertilizer during the 20th century revolutionized the entire food system. The industrial production of synthetic N fertilizer was a revolution for agricultural systems because it removed the natural constraint of N scarcity. Given sufficient energy, synthetic N fertilizer can be produced in limitless quantities from atmospheric dinitrogen (N2). This has far-reaching consequences for the whole agri-food system. The annual input of synthetic N fertilizer today is more than twice the annual input of new N in pre-industrial agriculture. Since 1961, increased N input has enabled global output of both crop and livestock products to roughly triple. During the same time period, total food-system N emissions to the environment have also more than tripled. Livestock production is responsible for a large majority of agricultural N emissions. Livestock consume about three-quarters of global cropland N output and are thereby responsible for a similar share of cropland N emissions to air and water. In addition, N emissions from livestock housing and manure management systems contribute a substantial share of global N emissions to air. There is broad political agreement that global N emissions from agriculture should be reduced by about 50%. High-level policy targets of the EU and of the UN Convention on Biological Diversity are for a 50% reduction in N emissions. These targets are in line with a large body of research assessing what would be needed to stay within acceptable limits as regards ecosystem change and human health impacts. In the absence of dietary change towards less N-intensive diets, N emissions from food systems could be reduced by about 30%, compared to business-as-usual scenarios. This could be achieved by implementing a combination of technical measures, improved management practices, improved recycling of wasted N (including N from human excreta), and spatial optimization of agriculture. Human dietary change, especially in the most affluent countries, offers a huge potential for reducing N emissions from food systems. While many of the world’s poor would benefit nutritionally from increasing their consumption of nutrient-rich animal-source foods, many other people consume far more nutrients than is necessary and could reduce consumption of animal-source food by half without any nutritional issues. Research shows that global adoption of healthy but less N-polluting diets might plausibly cut future food-system N losses by 10–40% compared to business-as-usual scenarios. There is no single solution for solving the N challenge. Research shows that efficiency improvements and food waste reductions will almost certainly be insufficient to reach agreed environmental targets. To reach agreed targets, it seems necessary to also shift global average food consumption onto a trajectory with less animal-source food.

Style APA, Harvard, Vancouver, ISO itp.

Wenger, Amelia S., Evelyn Alicia Gómez Juárez, Kim Falinski, Tanya Amaya, Christopher Corbin, Katie Cramer, Jos Hill i in. Water Pollution Toolkit. Wildlife Conservation Society, 2024. http://dx.doi.org/10.19121/2024.report.50065.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Editors, Intersections. The Pollution of Sacred Water. Intersections, Social Science Research Council, styczeń 2024. http://dx.doi.org/10.35650/int.4024.d.2024.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Metaxoglou, Konstantinos, i Aaron Smith. Nutrient Pollution and U.S. Agriculture: Causal Effects, Integrated Assessment, and Implications of Climate Change. Cambridge, MA: National Bureau of Economic Research, czerwiec 2022. http://dx.doi.org/10.3386/w30124.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Walker, S., A. Gross, D. Jassby i W. Tester. Energy, nutrient and water recovery from dairy waste. Israel: United States-Israel Binational Agricultural Research and Development Fund, 2020. http://dx.doi.org/10.32747/2020.8134167.bard.

Pełny tekst źródła

Streszczenie:

The overall goal of this project was to investigate an innovative integrated approach to extracting energy, clean water, and valuable nutrients efficiently from the estimated 180-190 million cubic meters of effluent left behind after anaerobic digestion (AD) of dairy manure and related food wastes. In addition to producing new value streams, this process can reduce or eliminate the need for application of anaerobic digestate on land, which can pollute air and water.

Style APA, Harvard, Vancouver, ISO itp.

Schlossnagle, Trevor H., Janae Wallace, i Nathan Payne. Analysis of Septic-Tank Density for Four Communities in Iron County, Utah - Newcastle, Kanarraville, Summit, and Paragonah. Utah Geological Survey, grudzień 2022. http://dx.doi.org/10.34191/ri-284.

Pełny tekst źródła

Streszczenie:

Iron County is a semi-rural area in southwestern Utah that is experiencing an increase in residential development. Although much of the development is on community sewer systems, many subdivisions use septic tank soil-absorption systems for wastewater disposal. Many of these septic-tank systems overlie the basin-fill deposits that compose the principal aquifer for the area. The purpose of our study is to provide tools for waterresource management and land-use planning. In this study we (1) characterize the water quality of four areas in Iron County (Newcastle, Kanarraville, Summit, and Paragonah) with emphasis on nutrients, and (2) provide a mass-balance analysis based on numbers of septic-tank systems, groundwater flow available for mixing, and baseline nitrate concentrations, and thereby recommend appropriate septic-system density requirements to limit water-quality degradation. We collected 57 groundwater samples and three surface water samples across the four study areas to establish baseline nitrate concentrations. The baseline nitrate concentrations for Newcastle, Kanarraville, Summit, and Paragonah are 1.51 mg/L, 1.42 mg/L, 2.2 mg/L, and 1.76 mg/L, respectively. We employed a mass-balance approach to determine septic-tank densities using existing septic systems and baseline nitrate concentrations for each region. Nitrogen in the form of nitrate is one of the principal indicators of pollution from septic tank soil-absorption systems. To provide recommended septic-system densities, we used a mass-balance approach in which the nitrogen mass from projected additional septic tanks is added to the current nitrogen mass and then diluted with groundwater flow available for mixing plus the water added by the septic-tank systems themselves. We used an allowable degradation of 1 mg/L with respect to nitrate. Groundwater flow volume available for mixing was calculated from existing hydrogeologic data. We used data from aquifer tests compiled from drinking water source protection documents to derive hydraulic conductivity from reported transmissivities. Potentiometric surface maps from existing publications and datasets were used to determine groundwater flow directions and hydraulic gradients. Our results using the mass balance approach indicate that the most appropriate recommended maximum septic-tank densities in Newcastle, Kanarraville, Summit, and Paragonah are 23 acres per system, 7 acres per system, 5 acres per system, and 11 acres per system, respectively. These recommendations are based on hydrogeologic parameters used to estimate groundwater flow volume. Public valley-wide sewer systems may be a better alternative to septic-tank systems where feasible.

Style APA, Harvard, Vancouver, ISO itp.

Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!