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Journal articles on the topic 'Nutrient pollution of water'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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1

Zhao, Haiping, Qingxue Li, and 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, no. 6 (December 1, 2014): 605–12. http://dx.doi.org/10.1260/1708-5284.11.6.605.

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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 tempora

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2

Mladenović-Ranisavljević, Ivana, Milovan Vuković, Violeta Stefanović, and Ljiljana Takić. "Multicriteria Decision Analysis of Sites with Increased Nutrient Contents in Water." Water 14, no. 23 (November 23, 2022): 3810. http://dx.doi.org/10.3390/w14233810.

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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

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3

Beasley, E. L., M. A. Hiller, and R. B. Biggs. "Susceptibility of U.S. Estuaries to Pollution." Water Science and Technology 20, no. 6-7 (June 1, 1988): 211–19. http://dx.doi.org/10.2166/wst.1988.0205.

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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 wat

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4

Kronvang, Brian, Frank Wendland, Karel Kovar, and Dico Fraters. "Land Use and Water Quality." Water 12, no. 9 (August 28, 2020): 2412. http://dx.doi.org/10.3390/w12092412.

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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 nutri

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5

Yan, Jing, Nathaniel A. Bogie, and Teamrat A. Ghezzehei. "Root uptake under mismatched distributions of water and nutrients in the root zone." Biogeosciences 17, no. 24 (December 17, 2020): 6377–92. http://dx.doi.org/10.5194/bg-17-6377-2020.

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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 grow

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6

PUCKETT, LARRY J. "Identifying the Major Sources of Nutrient Water Pollution." Environmental Science & Technology 29, no. 9 (September 1995): 408A—414A. http://dx.doi.org/10.1021/es00009a743.

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7

Randall, C. W. "The environmental, economic and societal consequences of inadequate nitrogen pollution controls." Water Science and Technology 49, no. 5-6 (March 1, 2004): 23–33. http://dx.doi.org/10.2166/wst.2004.0733.

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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 t

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8

Moss, Brian. "Water pollution by agriculture." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1491 (July 30, 2007): 659–66. http://dx.doi.org/10.1098/rstb.2007.2176.

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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 Di

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9

de Lima Barros, Alessandra Maciel, Maria do Carmo Sobral, and 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, no. 2 (July 1, 2013): 357–65. http://dx.doi.org/10.2166/wst.2013.086.

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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

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10

Zeng, Chun Fen, La Chun Wang, Wen Yu Huang, and 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 (October 2011): 924–28. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.924.

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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 fa

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11

Hastings, Florencia, Mario Pérez-Bidegain, Rafael Navas, and Angela Gorgoglione. "Impacts of irrigation development on water quality in the San Salvador watershed (Part 2): Implementation of scenarios in SWAT." Agrociencia Uruguay 27, NE1 (February 6, 2024): e1199. http://dx.doi.org/10.31285/agro.27.1199.

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Intensive agricultural activities pose a significant threat to water quality as critical non-point sources of pollution. Effective mitigation strategies demand understanding the causes and processes of water pollution. This study aimed to quantify the impacts of irrigation development on water quality and assess best management practices for sustainable agriculture intensification. Employing the calibrated SWAT model for the San Salvador watershed (baseline scenario), two scenarios were implemented and evaluated: the first one depicted irrigation development from a future reservoir, and the se

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12

Costa Jr., Ozeas S. "Anthropogenic nutrient pollution of coral reefs in Southern Bahia, Brazil." Brazilian Journal of Oceanography 55, no. 4 (December 2007): 265–79. http://dx.doi.org/10.1590/s1679-87592007000400004.

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Spatial, temporal and anthropogenic controls on nutrient distribution were evaluated for nearshore and offshore reefs at Porto Seguro Bay, Southern Bahia. Water samples were analysed for total oxidised nitrogen (TON), soluble reactive phosphorus (SRP), reactive silica (DSi), and chlorophyll a (Chl). The results indicate that rainfall promotes a significant (F=19.873, p<0.001) increase in the load of nutrients to nearshore (average 12% increase) and offshore reefs (average 31% increase). Nutrient concentrations at the urbanized reef (TON=1.93-3.21µM; SRP=0.57-0.89µM; DSi=8.48-11.15µM) are on

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13

Tank, Jennifer, and Alexander Reisinger. "Nutrient Limitation and Uptake Rates in Streams and Rivers of the Greater Yellowstone Ecosystem." UW National Parks Service Research Station Annual Reports 36 (January 1, 2013): 153–59. http://dx.doi.org/10.13001/uwnpsrc.2013.4011.

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Nutrient pollution of aquatic ecosystems is a growing concern as the influence of human activities continues to increase on the landscape. Headwater streams have long been shown to process nutrients via the biofilm community growing on the bottom of streams. The growth and activity of these biofilms is often limited by the availability of nitrogen (N), phosphorus (P), or co-limited by both N and P. Although small stream nutrient dynamics are relatively well understood, comparatively little is known about larger, non-wadeable rivers. Biofilms on the river bottom are likely still nutrient limite

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14

Giang, P. H., H. Harada, S. Fujii, N. P. H. Lien, H. T. Hai, P. N. Anh, and S. Tanaka. "Transition of fertilizer application and agricultural pollution loads: a case study in the Nhue-Day River basin." Water Science and Technology 72, no. 7 (June 16, 2015): 1072–81. http://dx.doi.org/10.2166/wst.2015.312.

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Rapid socio-economic development in suburban areas of developing countries has induced changes in agricultural waste and nutrient management, resulting in water pollution. The study aimed at estimating agricultural nutrient cycles and their contribution to the water environment. A material flow model of nitrogen (N) and phosphorus (P) was developed focusing on agricultural activities from 1980 to 2010 in Trai hamlet, an agricultural watershed in Nhue-Day River basin, Vietnam. The model focused on the change in household management of human excreta and livestock excreta, and chemical fertilizer

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15

Hong, Jiarui, Jing Zhang, Yongyu Song, and Xin Cao. "Spatial and Temporal Distribution Characteristics of Nutrient Elements and Heavy Metals in Surface Water of Tibet, China and Their Pollution Assessment." Water 14, no. 22 (November 14, 2022): 3664. http://dx.doi.org/10.3390/w14223664.

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In the context of global climate change, the ecological environment of Tibet has been gaining attention given its unique geographical and fragile nature. In this study, to understand the pollution status of the surface water of Tibet, China, we collected monthly data of 12 indicators from 41 cross-sectional monitoring sites in 2021 and analyzed the spatial and temporal variations of nutrients and heavy metal elements, water quality conditions, and pollutant sources in surface water. All 12 polluting elements, except lead (Pb), had significant seasonal variations, but the magnitude of the diffe

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16

Relf, P. Diane, and David McKissack. "CONSUMER NUTRIENT MANAGEMENT CALENDAR." HortScience 25, no. 9 (September 1990): 1114b—1114. http://dx.doi.org/10.21273/hortsci.25.9.1114b.

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The Virginia Gardener Nutrient Management Education Program addressed non-point, urban-runoff pollution of Virginia's streams, estuaries, and groundwater, and included a calendar aimed at alerting the garden consumer to the connection between overfertilization and water pollution. Over 15,000 calendars were requested.A survey of calendar recipients was conducted. 1500 persons were chosen at random, a subsequent address check confirmed adequate distribution among the regions of the state. The response rate was 28%. Responses indicated that 91.3% of those surveyed had changed their garden practi

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17

Loboda, N. S., and A. M. Kuza. "Environmental risks assessment of the Kogylnyk River nutrient pollution based on probit functions." Ukrainian hydrometeorological journal, no. 32 (December 27, 2023): 34–49. http://dx.doi.org/10.31481/uhmj.32.2023.03.

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The relevance of the study is associated with the need to determine the risks of high and catastrophic levels of water pollution of the Kogylnyk River. The water quality of this river affects the environmental condition of the northern part of Sasyk lake and reservoir. This artificial reservoir that was created as part of the estuary used to be one of components of the Danube-Dniester irrigation system in the past and can be used for irrigation in the post-war period in the future. As the North-Western Black Sea region is an agricultural region of Ukraine, the article focuses on the pollution

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18

Voogt, W. "THE DEVELOPMENT OF CLOSED GROWING SYSTEMS IN THE NETHERLANDS AS A MEANS TO REDUCE ENVIRONMENTAL POLLUTION." HortScience 29, no. 4 (April 1994): 255a—255. http://dx.doi.org/10.21273/hortsci.29.4.255a.

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In the Netherlands, many crops in protected cultivation changed from soil to soilless culture in recent years. The reasons for this development were problems with soil sterilization and better growth control with soilless culture, which led to considerable yield increases. However, the growing systems used, with free leachate drainage, contribute highly to pollution of the ground and surface water with minerals (N and P). To reduce this emission, closed growing systems were developed, i.e., systems with recirculating nutrient solutions. Inherent to these systems, however, were problems such as

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19

Lawniczak-Malińska, Agnieszka, Bogumił Nowak, and Kamil Pajewski. "Agricultural Pressures on the Quality of Ground and Surface Waters in Catchments of Artificial Reservoirs." Water 15, no. 4 (February 8, 2023): 661. http://dx.doi.org/10.3390/w15040661.

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Changes in nutrient concentrations in groundwater were investigated to determine the impact of agriculture on water quality in artificial lakes. The study covered three reservoirs in an agricultural area of Wielkopolska (central-western part of Poland). Assessing the agricultural impact required a network of piezometers around the reservoirs, used to determine the degree of groundwater pollution from nutrients supplied to the reservoirs. Moreover, the analysis covered the quality of water in streams flowing into the reservoirs, and in the reservoirs themselves. Field research was conducted eve

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20

Mosheim, Roberto, and Robin C. Sickles. "Spatial effects of nutrient pollution on drinking water production." Empirical Economics 60, no. 6 (March 10, 2021): 2741–64. http://dx.doi.org/10.1007/s00181-021-02019-1.

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21

Angalika, Misigo W. S., Seiji Suzuki, Truc-Ly Le-Huynh, Tomoaki Itayama, and Wataru Tanaka. "Assessing nutrient budget of ungauged catchment using intermittent water quality markers." Maejo International Journal of Energy and Environmental Communication 4, no. 3 (September 28, 2022): 1–10. http://dx.doi.org/10.54279/mijeec.v4i3.247534.

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This study is a preliminary spatial-temporal assessment method of the ungauged catchment to determine the variation in water quality (WQ) and the land use influence on river basins’ health. The intermittent WQ data, the principal component analysis, and the redundancy analysis were used to evaluate the (dis)similarity among the 10 ungauged streams and their significance in the entire catchment. These revealed some similarities/differences in nutrient pollution and latent land-use influence on the streams’ health. There were similarities between R6-R7, R9-R10, among R1 to R4 basins, while R5 an

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22

Zheng, Yuexin, Qianyang Wang, Xuan Zhang, Jingshan Yu, Chong Li, Liwen Chen, and Yuan Liu. "Nitrogen and Phosphorus Retention Risk Assessment in a Drinking Water Source Area under Anthropogenic Activities." Remote Sensing 14, no. 9 (April 26, 2022): 2070. http://dx.doi.org/10.3390/rs14092070.

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Excessive nitrogen (N) and phosphorus (P) input resulting from anthropogenic activities seriously threatens the supply security of drinking water sources. Assessing nutrient input and export as well as retention risks is critical to ensuring the quality and safety of drinking water sources. Conventional balance methods for nutrient estimation rely on statistical data and a huge number of estimation coefficients, which introduces uncertainty into the model results. This study aimed to propose a convenient, reliable, and accurate nutrient prediction model to evaluate the potential nutrient reten

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23

Li, H. E., J. H. W. Lee, A. Koenig, and A. W. Jayawardena. "Nutrient load estimation in nonpoint source pollution of Hong Kong region." Water Science and Technology 51, no. 3-4 (February 1, 2005): 209–16. http://dx.doi.org/10.2166/wst.2005.0593.

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Red tides and eutrophication have been frequently observed over the past two decades in coastal waters around Hong Kong, which are caused by many factors and one of them is the nutrient from nonpoint source pollution (NSP). This paper concentrates on the nutrients carried by river flow from watersheds. Since there are no systematical data sets of nonpoint source pollution in Hong Kong, monthly river water quality measurements, rainfall and river flow data, land uses, and other related information are used to analyze the characteristics of NSP and estimate the nutrient loads for Hong Kong regio

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24

Zhao, Zhonghe, Gaohuan Liu, Qingsheng Liu, Chong Huang, and He Li. "Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand." International Journal of Environmental Research and Public Health 15, no. 11 (November 5, 2018): 2466. http://dx.doi.org/10.3390/ijerph15112466.

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Human activities can affect soil nutrients, thereby influencing river water quality. The spatial pattern of precipitation also impacts distributions of water quality. In this paper, we employed a method that combines point survey, soil, and water quality data to analyze the spatial relationships between precipitation, soil nutrient and water quality in the basin on the basis of field surveys and laboratory analysis. The ordinary kriging method was applied to interpolate the precipitation and soil data, and the spatial pattern was analyzed. The water samples on the main stream and soil samples

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25

Pandey, Shuchita, Rahul Soni, and Poornima Devi. "Phycoremediation - A Clean Technology for Water Pollution Abatement." International Journal of Research and Review 10, no. 11 (November 28, 2023): 490–503. http://dx.doi.org/10.52403/ijrr.20231157.

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Phycoremediation has been utilised to remediate wastewater and successfully lower nutrient levels. There isn’t many research, though, on how well phycoremediation works to lower nitrogen levels in eutrophic lakes. This review concentrates on the process and variables involved in using algae. Before considering the possibility of algal-based approaches in remediating lake eutrophication, to remove nutrients and contaminants from wastewater. Algal biofilm, algal grass scrubbers, high-rate algal ponds (HRAP), and immobilised algae are methods used in phycoremediation of wastewater. A wastewater t

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26

Yang, Xiaoqing, Mingkai Leng, Xuguang Ge, Xiaodong Wu, Haoran Liu, Guiying Lin, Zhi Huang, and Yuhan Chen. "Characterization and Risk Assessment of Nutrient and Heavy Metal Pollution in Surface Sediments of Representative Lakes in Yangxin County, China." Sustainability 16, no. 6 (March 7, 2024): 2252. http://dx.doi.org/10.3390/su16062252.

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Increased urbanization and industrialization globally have led to the widespread pollution of water bodies (e.g., lakes) by heavy metals (HMs) and nutrients. These pollutants accumulate in water and surface sediments, posing risks to both aquatic organisms and human health. In November 2022, surface sediment samples from three lakes—Lianhua Lake, Mati Lake, and North Lake—were collected to assess nutrient (nitrogen and phosphorous) and HM content. Total N (TN), total P (TP), and HM concentrations were analyzed. The pollution status was evaluated using comprehensive pollution index (FF) methods

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27

Greenhalgh, Suzie, and Paul Faeth. "A Potential Integrated Water Quality Strategy for the Mississippi River Basin and the Gulf of Mexico." Scientific World JOURNAL 1 (2001): 976–83. http://dx.doi.org/10.1100/tsw.2001.354.

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Nutrient pollution, now the leading cause of water quality impairment in the U.S., has had significant impact on the nation’s waterways. Excessive nutrient pollution has been linked to habitat loss, fish kills, blooms of toxic algae, and hypoxia (oxygen-depleted water). The hypoxic “dead zone” in the Gulf of Mexico is one of the most striking illustrations of what can happen when too many nutrients from inland watersheds reach coastal areas. Despite programs to improve municipal wastewater treatment facilities, more stringent industrial wastewater requirements, and agricultural programs design

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28

Wang, Huan, Qi Li, and Jun Xu. "Climate Warming Does Not Override Eutrophication, but Facilitates Nutrient Release from Sediment and Motivates Eutrophic Process." Microorganisms 11, no. 4 (March 31, 2023): 910. http://dx.doi.org/10.3390/microorganisms11040910.

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The climate is changing. The average temperature in Wuhan, China, is forecast to increase by at least 4.5 °C over the next century. Shallow lakes are important components of the biosphere, but they are sensitive to climate change and nutrient pollution. We hypothesized that nutrient concentration is the key determinant of nutrient fluxes at the water-sediment interface, and that increased temperature increases nutrient movement to the water column because warming stimulates shifts in microbial composition and function. Here, twenty-four mesocosms, mimicking shallow lake ecosystems, were used t

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29

Niu, Lixia, Pieter van Gelder, Xiangxin Luo, Huayang Cai, Tao Zhang, and Qingshu Yang. "Implications of Nutrient Enrichment and Related Environmental Impacts in the Pearl River Estuary, China: Characterizing the Seasonal Influence of Riverine Input." Water 12, no. 11 (November 19, 2020): 3245. http://dx.doi.org/10.3390/w12113245.

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The Pearl River estuary is an ecologically dynamic region located in southern China that experiences strong gradients in its biogeochemical properties. This study examined the seasonality of nutrient dynamics, identified related environmental responses, and evaluated how river discharge regulated nutrient sink and source. The field investigation showed significant differences of dissolved nutrients with seasons and three zones of the estuary regarding the estuarine characteristics. Spatially, nutrients exhibited a clear decreasing trend along the salinity gradient; temporally, their levels wer

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Xaxiri, Eirini, Evangelos Darivakis, Ioannis Karavidas, Georgia Ntatsi, and Dimitrios Savvas. "Comparing the Nutritional Needs of Two Solanaceae and One Cucurbitaceae Species Grown Hydroponically under the Same Cropping Conditions." Plants 12, no. 20 (October 22, 2023): 3642. http://dx.doi.org/10.3390/plants12203642.

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Switching over to closed-loop soilless culture systems, thus preventing pollution of water resources by nitrates and saving water and fertilizers, requires accurate estimations of the mean nutrient-to-water uptake ratios. To contribute to this objective, three fruit vegetable species (tomato, eggplant, cucumber) were grown hydroponically in a floating system under identical cropping conditions to quantify species differences in nutrient uptake. The composition of the nutrient solution used to feed the crops was identical for all species. The total water consumption and the concentrations of mo

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Bae, M. S., and S. R. Ha. "Nonlinear regression approach to evaluate nutrient delivery coefficient." Water Science and Technology 53, no. 2 (January 1, 2006): 271–79. http://dx.doi.org/10.2166/wst.2006.061.

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Implementation of the Korean Total Maximum Daily Load Act calls for new tools to quantify nutrient losses from diffuse sources at a river basin district scale. In this study, it was elucidated that the nonlinear regression model (NRM) reduces the uncertainty of the boundary conditions of the water quality model. The NRM was proposed to analyse the delivery coefficients of surface waters and retention coefficients of pollutants. Delivery coefficient of pollution load was considered as a function of two variables: the watershed form ratio, Sf, which is a measurable geomorphologic variable and th

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Frei, Rebecca J., Gabriella M. Lawson, Adam J. Norris, Gabriel Cano, Maria Camila Vargas, Elizabeth Kujanpää, Austin Hopkins, et al. "Limited progress in nutrient pollution in the U.S. caused by spatially persistent nutrient sources." PLOS ONE 16, no. 11 (November 29, 2021): e0258952. http://dx.doi.org/10.1371/journal.pone.0258952.

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Human agriculture, wastewater, and use of fossil fuels have saturated ecosystems with nitrogen and phosphorus, threatening biodiversity and human water security at a global scale. Despite efforts to reduce nutrient pollution, carbon and nutrient concentrations have increased or remained high in many regions. Here, we applied a new ecohydrological framework to ~12,000 water samples collected by the U.S. Environmental Protection Agency from streams and lakes across the contiguous U.S. to identify spatial and temporal patterns in nutrient concentrations and leverage (an indicator of flux). For th

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Qi, Yiting, Xin Cao, Ruisi Cao, Mingjie Cao, Ailan Yan, Erpeng Li, and Dong Xu. "Research on the Analysis of and Countermeasures for the Eutrophication of Water Bodies: Waihu Reservoir as a Case Study." Processes 12, no. 4 (April 15, 2024): 796. http://dx.doi.org/10.3390/pr12040796.

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Water quality deterioration and eutrophication have become a global concern, while reservoir pollution caused by multiple factors has led to frequent algal blooms, posing a serious threat to rural drinking water security and urban water supply. The purpose of this paper is to analyze the current water quality of Waihu Reservoir and use the single index method, the weighted comprehensive scoring method, and the nutrient level index method (TLI) to evaluate eutrophication. On this basis, the pollution sources of the reservoir are comprehensively analyzed and discussed, and effective control stra

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34

Liao, Ren Kuan, Pei Ling Yang, Shu Mei Ren, Hang Yi, Bo Zhou, and Zhu Zhou. "Effects of Typical Chemical Agents on Prevention of Non-Point-Source (NPS) Pollution in a Sloping Orchard." Advanced Materials Research 550-553 (July 2012): 1168–72. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.1168.

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In this paper, two typical chemical agents SAP and PAM were selected to reduce NPS pollution. Soil water content, nutrient transport and soil erosion have been researched. The results showed that the water deep percolation was reduced and the moisture of root zone increased by 3.6%-12.69% after chemical agents application; PAM can immobile soil grains, and significantly reduce soil erosion on sloping land by 25.5%-53.4%. The synergies of PAM and SAP can significantly influence transport of nutrients in the soil vertical profile, moreover, the content of nutrient was enriched in root zone that

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Meals, Donald W. "Watershed-scale response to agricultural diffuse pollution control programs in Vermont, USA." Water Science and Technology 33, no. 4-5 (February 1, 1996): 197–204. http://dx.doi.org/10.2166/wst.1996.0505.

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From 1979 to 1990, the LaPlatte River Watershed and the St. Albans Bay Watershed Rural Clean Water Program projects in Vermont (USA) sought to reduce sediment, nutrient, and bacteria loads to parts of Lake Champlain impaired by eutrophication. Best Management Practices (BMPs) to control diffuse sources of pollution from dairy agriculture were widely implemented through a voluntary program of technical assistance and cost-sharing by agencies of the U.S. Department of Agriculture. Intensive water quality monitoring was undertaken to document water quality changes resulting from the land treatmen

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Savvas, Dimitrios, Evangelos Giannothanasis, Theodora Ntanasi, Ioannis Karavidas, and Georgia Ntatsi. "State of the Art and New Technologies to Recycle the Fertigation Effluents in Closed Soilless Cropping Systems Aiming to Maximise Water and Nutrient Use Efficiency in Greenhouse Crops." Agronomy 14, no. 1 (December 26, 2023): 61. http://dx.doi.org/10.3390/agronomy14010061.

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Inappropriate fertilisation results in the pollution of groundwater with nitrates and phosphates, eutrophication in surface water, emission of greenhouse gasses, and unwanted N deposition in natural environments, thereby harming the whole ecosystem. In greenhouses, the cultivation in closed-loop soilless culture systems (CLSs) allows for the collection and recycling of the drainage solution, thus minimising contamination of water resources by nutrient emissions originating from the fertigation effluents. Recycling of the DS represents an ecologically sound technology as it can reduce water con

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Muhammetoğlu, A., H. Muhammetoğlu, and S. Soyupak. "Evaluation of efficiencies of diffuse allochthonous and autochthonous nutrient input control in restoration of a highly eutrophic lake." Water Science and Technology 45, no. 9 (May 1, 2002): 195–203. http://dx.doi.org/10.2166/wst.2002.0238.

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Mogan Lake is an important recreational area for Metropolitan Ankara-Turkey. It is a shallow eutrophic lake with a dense growth of macrophytes. The main contributors of nutrients and other pollutants to the lake are the creeks carrying the runoff water from the watershed and upland farming land, in addition to the domestic and industrial wastewater discharges from a nearby town and industries. Hydrodynamic and water quality modeling techniques were used to determine the optimum management schemes for the lake restoration and diffuse pollution control. Management scenarios were devised and test

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38

Affoue Hortense, Kouame, Kouame Kouame Martin, Djirieoulou Kemomadjehi Claver, and Boussou Koffi Charles. "ORGANIC POLLUTION INDEX IN THE EVALUATION OF THE QUALITY OF LAKE DOHOU, A SOURCE OF DRINKING WATER SUPPLY IN THE CITY OF DUEKOUE (WEST COTE DIVOIRE)." International Journal of Advanced Research 9, no. 12 (December 31, 2021): 30–37. http://dx.doi.org/10.21474/ijar01/13872.

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The abiotic typology of the different sampling stations based on physico-chemical parameters and the assessment of the nutrient load and the relative contributions of the different nutrient sources to this surface water were analysed. Five physical and chemical parameters (temperature, dissolved oxygen, transparency, pH and conductivity) were measured in situ at each sampling campaign in Lake Dohou over a period of one year, once a month at seven (7) selected stations. Water samples were taken for subsequent determination of dissolved solids, biological oxygen demand for 5 days and nutrient sa

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39

Ghosh Roy, Subhomita, Charles F. Wimpee, S. Andrew McGuire, and Timothy J. Ehlinger. "Responses of Bacterial Taxonomical Diversity Indicators to Pollutant Loadings in Experimental Wetland Microcosms." Water 14, no. 2 (January 16, 2022): 251. http://dx.doi.org/10.3390/w14020251.

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Urbanization results in higher stormwater loadings of pollutants such as metals and nutrients into surface waters. This directly impacts organisms in aquatic ecosystems, including microbes. Sediment microbes are known for pollution reduction in the face of contamination, making bacterial communities an important area for bioindicator research. This study explores the pattern of bacterial responses to metal and nutrient pollution loading and seeks to evaluate whether bacterial indicators can be effective as a biomonitoring risk assessment tool for wetland ecosystems. Microcosms were built conta

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Ejike David Ugwuanyi, Zamathula Queen Sikhakhane Nwokediegwu, Michael Ayorinde Dada, Michael Tega Majemite, and Alexander Obaigbena. "Review of emerging technologies for nutrient removal in wastewater treatment." World Journal of Advanced Research and Reviews 21, no. 2 (February 28, 2024): 1737–49. http://dx.doi.org/10.30574/wjarr.2024.21.2.0520.

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The burgeoning global population and industrial activities have significantly increased the generation of wastewater laden with nutrients, posing severe environmental and public health concerns. Traditional wastewater treatment methods often fall short in effectively removing nutrients like nitrogen and phosphorus, leading to eutrophication of water bodies and endangering aquatic ecosystems. In response, emerging technologies for nutrient removal in wastewater treatment have gained traction in recent years, offering innovative and efficient solutions to mitigate nutrient pollution. This compre

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41

Cooper, Rachael Z., Sarina J. Ergas, and Mahmood Nachabe. "Multi-Decadal Nutrient Management and Trends in Two Catchments of Lake Okeechobee." Resources 13, no. 2 (February 13, 2024): 28. http://dx.doi.org/10.3390/resources13020028.

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Despite years of efforts to improve water quality, harmful algal blooms remain a chronic phenomenon, with devastating environmental, economic, and social impacts in many regions worldwide. In this study, we assessed the complexity of nutrient pollution attributed to harmful algal blooms in South Florida (USA) by analyzing 20 years of flow and nutrient data within two headwater basins in the Lake Okeechobee (LO) watershed. The study used an established advanced regression method, the Weighted Regression on Time, Discharge, and Season (WRTDS) method, as an analysis framework to examine the impac

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42

Tonmanee, N., and N. Kanchanakool. "Agricultural diffuse pollution in Thailand." Water Science and Technology 39, no. 3 (February 1, 1999): 61–66. http://dx.doi.org/10.2166/wst.1999.0137.

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Over the past two decades there have been a number of changes in Thailand, changes in the environment and quality of life for its people, changes in its communities and in the foundations of its economy. Before 1970, Thailand was a rural society in which local communities depended on the natural resources which surrounded them, and the national economy relied on the export of native crops. The sustainable use of resources was a fundamental aspect of rural life, people understood the interrelationships between the different components of their local environment and their activities which were d

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43

Wang, X., T. Li, Q. Xu, and W. He. "Study of the distribution of non-point source pollution in the watershed of the Miyun Reservoir, Beijing, China." Water Science and Technology 44, no. 7 (October 1, 2001): 35–40. http://dx.doi.org/10.2166/wst.2001.0383.

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Nitrogen and phosphorus are major nutrients to cause eutrophication to degrade the water quality of the Miyun Reservoir, a very important drinking water source of Beijing in China. These are mainly from non-point sources. The watershed in Miyun County is selected as the study region with a total area of 1400 km2. Four typical monitoring catchments and two experimental units were used to monitor the precipitation, runoff, sediment yield and pollutant loading related to various land uses in the meantime. The results show that the total nutrient loss amount of TN and TP is 898.07 t/a, and 40.70 t

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44

Han, P., K. Vijayaraghavan, S. Reuben, E. S. Estrada, and U. M. Joshi. "Reduction of nutrient contaminants into shallow eutrophic waters through vegetated treatment beds." Water Science and Technology 68, no. 6 (September 1, 2013): 1280–87. http://dx.doi.org/10.2166/wst.2013.361.

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One of the most effective mitigative approaches to eutrophication is the reduction of nutrient loading into water bodies. Bioremediation presents an economically viable and ecologically sustainable technology to nutrient pollution control taking advantage of the remarkable ability of plants and their associated microbial community to assimilate and remove nutrients from the environment. In this study, four emergent macrophytes (Cyperus haspan, Pandanus amaryllifolius, Pontederia cordata and Thalia geniculata) and two floating plants (Hygroryza aristata and Pistia stratiotes) were deployed in b

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McMahon, P. J. T. "The Impact of Marinas on Water Quality." Water Science and Technology 21, no. 2 (February 1, 1989): 39–43. http://dx.doi.org/10.2166/wst.1989.0025.

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Four salt-water marinas were studied in an attempt to ascertain their impact on water quality. Analyses of water, sediment and biological samples showed no evidence of dissolved oxygen depletion or nutrient enrichment of the water column and no nutrient enrichment, organic pollution, toxic pollution or bacterial degradation of the sediments. Analyses of organotin compounds from antifouling residues were inconclusive due to problems in interpreting the results and comparing them with overseas results. The major impact was found to be the build-up of heavy metals (Pb, Cu, Zn, Hg) and petroleum h

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Xuan, Weidong, Chenggang Yang, Xiang Wu, Yiting Shao, and Yu Bai. "A Numerical Model of the Pollutant Transport in Rivers with Multi-Layer Rigid Vegetation." Water 16, no. 10 (May 14, 2024): 1397. http://dx.doi.org/10.3390/w16101397.

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River water pollution is a key environmental issue to human society. How to effectively simulate the flow velocity and pollution transport in a vegetated river can provide a theoretical basis for solving such problems. Based on previous experimental data, this article uses the lattice Boltzmann method and random displacement method to simulate the velocity distribution and nutrient transport in multi-layer rigid vegetated rivers. The simulation results indicate that incorporating the drag force of the vegetation into the model according to different vegetation layers can effectively simulate t

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Klages, Susanne, Claudia Heidecke, Bernhard Osterburg, John Bailey, Irina Calciu, Clare Casey, Tommy Dalgaard, et al. "Nitrogen Surplus—A Unified Indicator for Water Pollution in Europe?" Water 12, no. 4 (April 22, 2020): 1197. http://dx.doi.org/10.3390/w12041197.

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Pollution of ground-and surface waters with nitrates from agricultural sources poses a risk to drinking water quality and has negative impacts on the environment. At the national scale, the gross nitrogen budget (GNB) is accepted as an indicator of pollution caused by nitrates. There is, however, little common EU-wide knowledge on the budget application and its comparability at the farm level for the detection of ground-and surface water pollution caused by nitrates and the monitoring of mitigation measures. Therefore, a survey was carried out among experts of various European countries in ord

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48

Urrestarazu, Miguel, Isidro Morales, Tommaso La Malfa, Ruben Checa, Anderson F. Wamser, and Juan E. Álvaro. "Effects of Fertigation Duration on the Pollution, Water Consumption, and Productivity of Soilless Vegetable Cultures." HortScience 50, no. 6 (June 2015): 819–25. http://dx.doi.org/10.21273/hortsci.50.6.819.

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The management of water and nutrient ions, such as nitrate, has been studied extensively in recent decades. Increasingly efficient models have been developed for the use of water and nutrients through the automation of fertigation techniques. The application of a fertigation volume for a duration four times longer than applied on the control was evaluated. In Almería (Spain), one pepper crop and two tomato crops—with and without grafting—were grown between Oct. 2013 and June 2014 in a soilless system with a coir substrate. The effects on root growth, plant growth, production, and quality were

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49

Burke, S., L. Heathwaite, P. Quinn, S. Merrett, P. Whitehead, N. Preedy, D. Lerner, and A. Saul. "Strategic management of non-point source pollution from sewage sludge." Water Science and Technology 47, no. 7-8 (April 1, 2003): 305–10. http://dx.doi.org/10.2166/wst.2003.0703.

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In the UK, the recycling of sewage sludge to land is expected to double by 2006 but the security of this route is threatened by environmental concerns and health scares. Strategic investment is needed to ensure sustainable and secure sludge recycling outlets. At present, the security of this landbank for sludge recycling is determined by legislation relating to nutrient rather than potentially toxic elements (PTEs) applications to land - especially the environmental risk linked to soil phosphorus (P) saturation. We believe that not all land has an equal risk of contributing nutrients derived f

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Chu, Xiaodong, Daishe Wu, Hao Wang, Fangwen Zheng, Cheng Huang, and Liang Hu. "Spatial Distribution Characteristics and Risk Assessment of Nutrient Elements and Heavy Metals in the Ganjiang River Basin." Water 13, no. 23 (November 28, 2021): 3367. http://dx.doi.org/10.3390/w13233367.

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The pollution of water bodies by nutrients and heavy metals can lead to a loss of biodiversity, environmental degradation, and harm to human health. During the two-month monitoring period (e.g., December 2019 to January 2020), variables such as trace metals (e.g., Cu, Zn, As, and Cr), nutrients (e.g., NH4+-N, TN, and TP), water temperature, pH value, dissolved oxygen (DO), chemical oxygen demand (COD) and five-day biochemical oxygen demand (BOD5) were measured at 102 monitoring points in the main stream and tributaries of the Ganjiang River in the Poyang Lake Basin. A variety of multivariate s

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