Multi-range In-situ Water Quality Total Phosphorus Total Nitrogen Integrated Online Monitor

2019 ◽  
Vol 40 (7) ◽  
pp. 930-940
Author(s):  
李 文 LI Wen ◽  
吕 赫 LYU He ◽  
徐明刚 XU Ming-gang ◽  
程 李 CHENG Li ◽  
马俊源 MA Jun-yuan
Keyword(s):  
Water Quality ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Online Monitor

scholarly journals Effect of red algal bloom on growth and production of carps

Our Nature ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 48-54
Author(s):  
Ram Bhajan Mandal ◽  
Sunila Rai ◽  
Madhav Kumar Shrestha ◽  
Dilip Kumar Jha ◽  
Narayan Prasad Pandit
Keyword(s):  
Water Quality ◽  
Body Weight ◽  
Chlorophyll A ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Algal Bloom ◽  
Total Dissolved Solids ◽  
Dissolved Solids ◽  
Aquaculture Farm ◽  
Red Algal

An experiment was carried to assess the effect of red algal bloom on growth and production of carp, water quality and profit from carp for 120 days at Aquaculture Farm of Agriculture and Forestry University, Chitwan. The experiment included two treatments: carp polyculture in non-red pond and carp polyculture in red pond with algal bloom each with three replicates. Carp fingerlings were stocked at 1 fish/m2 and fed with pellet containing 24% CP at 3% body weight. Net yield of rohu was found significantly higher (p<0.05) in non-red ponds (0.38±0.01 t ha-1) than red ponds (0.24±0.05 t ha-1). Survival of rohu (84.9±1.4%), bighead (95.2±2.0%) and mrigal (88.1±14.4%) were also significantly higher (p<0.05) in non-red ponds than red ponds. Red algal bloom affected DO, nitrate and chlorophyll-a, nitrite, total nitrogen, total phosphorus, total dissolved solids and conductivity. However, overall carp production and profit from carp remained unaffected.

scholarly journals Quality of surface water related to land use: a case study in a catchment with small farms and intensive vegetable crop production in southern Brazil

2014 ◽  
Vol 38 (2) ◽  
pp. 656-668 ◽  
Author(s):  
Karina Hacke Ribeiro ◽  
Nerilde Favaretto ◽  
Jeferson Dieckow ◽  
Luiz Cláudio de Paula Souza ◽  
Jean Paolo Gomes Minella ◽  
...  
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Land Use ◽  
Surface Water ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Oxygen Demand ◽  
Lower Percentage ◽  
Native Forest ◽  
Particulate Nitrogen

Water degradation is strongly related to agricultural activity. The aim of this study was to evaluate the influence of land use and some environmental components on surface water quality in the Campestre catchment, located in Colombo, state of Parana, Brazil. Physical and chemical attributes were analyzed (total nitrogen, ammonium, nitrate, total phosphorus, electrical conductivity, pH, temperature, turbidity, total solids, biological oxygen demand, chemical oxygen demand and dissolved oxygen). Monthly samples of the river water were taken over one year at eight monitoring sites, distributed over three sub-basins. Overall, water quality was worse in the sub-basin with a higher percentage of agriculture, and was also affected by a lower percentage of native forest and permanent preservation area, and a larger drainage area. Water quality was also negatively affected by the presence of agriculture in the riparian zone. In the summer season, probably due to higher rainfall and intensive soil use, a higher concentration of total nitrogen and particulate nitrogen was observed, as well as higher electrical conductivity, pH and turbidity. All attributes, except for total phosphorus, were in compliance with Brazilian Conama Resolution Nº 357/2005 for freshwater class 1. However, it should be noted that these results referred to the base flow and did not represent a discharge condition since most of the water samples were not collected at or near the rainfall event.

Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA)

2018 ◽  
Vol 52 (4) ◽  
pp. 19-31
Author(s):  
Christopher Buzzelli ◽  
Zhiqiang Chen ◽  
Peter Doering ◽  
Amanda Kahn
Keyword(s):  
Water Quality ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Suspended Solids ◽  
Environmental Parameters ◽  
Total Suspended Solids ◽  
South Florida ◽  
Freshwater Inflow ◽  
Spatial And Temporal Variability ◽  
Palm Beach County

Abstract Coastal water bodies are impacted by watershed alterations, increased population density, modifications to inlets and shorelines, climatic periodicity, and increases in external material loads. Estuaries such as Lake Worth Lagoon (LWL) in south Florida possess all these attributes. The LWL watershed extends from the southeastern portion of Lake Okeechobee through Palm Beach County, where it meets the lagoon. Palm Beach County Department of Environmental Resources Management recognizes the social and ecological importance of the ~36 km lagoon and aims to maintain suitable water and habitat quality for all stakeholders. Recent declines and shifts of seagrass distribution along the lagoon prompted a step toward better understanding the water quality patterns of the system. In support of these efforts, this study assessed bathymetry, inflow, flushing, and water quality attributes (chlorophyll a, salinity, total nitrogen, total phosphorus, total suspended solids, turbidity) using data collected along a series of 14 midlagoon stations from 2007 to 2015. Salinity in the North Segment was higher and less variable because of proximity to Palm Beach Inlet. Although concentrations of chlorophyll a, total nitrogen, and total phosphorus correlated with freshwater inflow, turbidity and total suspended solids were not. Fast flushing of the lagoon on a scale of days likely precludes water quality issues common to many estuaries with higher resident times. However, the combination of landscape-scale water management, a shoreline that is almost 70% modified by hard structures, and changes in essential nearshore habitats, introduces new levels of uncertainty to both the understanding and management of LWL. From this study, increased knowledge of relationships among water quality parameters and their spatial and temporal variability in LWL provides points of reference from which targeted studies can be developed to explore links between environmental parameters and responses of key organisms in this unique system.

scholarly journals Research on water environmental capacity accounting of the Yongzhou Section of Xiangjiang River Basin based on the SWAT-EFDC coupling model

2021 ◽  
Author(s):  
Li Wu ◽  
Zhe Chen ◽  
Xuan Ding ◽  
Hui-ying Liu ◽  
Dun-qiu Wang
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Coupling Model ◽  
Theoretical Formula ◽  
Environmental Capacity ◽  
Xiangjiang River ◽  
Water Environmental Capacity ◽  
Xiangjiang River Basin

Abstract In this paper, a coupling model of SWAT (Soil and Water Assessment Tool) and EFDC (Environmental Fluid Dynamics Code) was established, and the relationship between the pollution source and water quality response was identified. Based on the hydrodynamic water quality simulation results and the one-dimensional WEC (water environmental capacity) theoretical formula, the total nitrogen and total phosphorus WEC and the remaining WEC of the Yongzhou Section of Xiangjiang River Basin under the guaranteed rate of 90% and in 2017 were calculated, respectively. It can be seen from the results that the total nitrogen WEC of the Yongzhou Section of Xiangjiang River Basin in 2017 is 27,673.04 t, the total nitrogen WEC under the guaranteed rate of 90% is 19,497.61 t/a and the total phosphorus WEC of the Yongzhou Section of Xiangjiang River Basin in 2017 is 4,877.22 t. The total phosphorus WEC under the guaranteed rate of 90% is 2,936.64 t/a; in 2017, the remaining WECs of total nitrogen and total phosphorus in the entire basin are 14,646.69 and 3,358.67 t, respectively.

Study on In Situ Purification Technology for Improving Water Quality of Reservoir Water

2013 ◽  
Vol 848 ◽  
pp. 227-230
Author(s):  
Hua Dong Zhang ◽  
Yan Zhen Yu ◽  
Jie Tang ◽  
Juan Ting Wang
Keyword(s):  
Water Quality ◽  
Total Nitrogen ◽  
Microbial Population ◽  
Removal Rate ◽  
Fluorescent Pseudomonad ◽  
Raw Water ◽  
Reservoir Water ◽  
Population Structures

In-situ purification technology is used to improve the water quality of reservoir water, which uses the biofilm formed by enrichment microbes gathering on carrier system to purify water. Results indicate that total nitrogen and algae can be effectively removed, and the average removal rate of total nitrogen and the chlorophyll a is 18.1% and 25% respectively. The result of PCR-DGGE indicates that compared with the biological community in raw water, the biofilm on ecological carriers exhibit a more diverse population structure. Fluorescent pseudomonad which can effectively remove nitrogen and pseudomonas aeruginosa which can dissolve algae have formed stable microbial population structures in the in- situ purification area.

scholarly journals Comparing nutrient reference concentrations in Nordic countries with focus on lowland rivers

AMBIO ◽  
2020 ◽  
Vol 49 (11) ◽  
pp. 1771-1783 ◽  
Author(s):  
Eva Skarbøvik ◽  
Jukka Aroviita ◽  
Jens Fölster ◽  
Anne Lyche Solheim ◽  
Katarina Kyllmar ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Land Use Changes ◽  
Reference Conditions ◽  
Water Bodies ◽  
Lowland Rivers ◽  
Nitrogen Concentrations ◽  
Further Development

Abstract Reference conditions of water bodies are defined as the natural or minimal anthropogenically disturbed state. We compared the methods for determining total phosphorus and total nitrogen concentrations in rivers in Finland, Norway and Sweden as well as the established reference conditions and evaluated the possibility for transfer and harmonisation of methods. We found that both methods and values differed, especially for lowland rivers with a high proportion of agriculture in the catchment. Since Denmark has not yet set reference conditions for rivers, two of the Nordic methods were tested for Danish conditions. We conclude that some of the established methods are promising but that further development is required. We moreover argue that harmonisation of reference conditions is needed to obtain common benchmarks for assessing the impacts of current and future land use changes on water quality.

scholarly journals Effects of a lagoon on performances of a freshwater fishpond in a multi-trophic aquaculture system

2021 ◽  
Vol 34 ◽  
pp. 4
Author(s):  
Christophe Jaeger ◽  
Marc Roucaute ◽  
Sarah Nahon
Keyword(s):  
Water Quality ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Chlorophyll Concentration ◽  
Initial Density ◽  
Fish Growth ◽  
Total Production ◽  
Fish Production ◽  
Roach Rutilus Rutilus ◽  
Growth Performances

Integrated multi-trophic aquaculture (IMTA) is a way to help preserve the environment while maintaining a good level of total production. An ecologically semi-intensive pond system was designed in which a polyculture fishpond was associated with a lagoon planted with macrophytes to bioremediate the water. The properties of this “semi-intensive coupled” system (SIC) were compared to those of semi-intensive (SI) and extensive (E) systems, each of which was contained in a single fishpond with the same fish polyculture (common carp (Cyprinus carpio), roach (Rutilus rutilus), and perch (Perca fluviatilis)) as SIC. E differed in that it had half the initial density of fish, and the fish were not fed. Fish growth performances, water quality (chemical and biological indicators), chlorophyll concentrations, and invertebrate production were measured. The systems were compared based on fish production performances and physicochemical and biological characteristics, and were then described using principal component analysis (PCA). Carp and roach in the two fed systems had higher growth performances than those in E. Compared to SI, the planted lagoon in SIC, induced a decrease of 15% in fish growth performances and of 83% in total chlorophyll concentration (a proxy for phytoplankton) but improved water quality (−34%, −60% and −80%, for the concentrations of total nitrogen, total phosphorus, and blue green algae (for micro-algae in class Cyanophyceae), respectively). According to the PCA, SIC clearly differed from SI in benthic macro-invertebrate production and concentrations of total nitrogen, total phosphorus, and brown algae (for micro-algae in class Dinophyceae or a branch of Bacillariophyta) in the water. SIC differed from E in oxygen parameters (dissolved and saturation), estimated annual zooplankton production, and pH. In conclusion, the properties of a lagoon reveal perspectives for environmentally friendly practices, while using biodiversity and secondary production in order to enhance fish production.

scholarly journals Qualidade da Água, Carga Orgânica e de Nutrientes na Foz do Córrego da Cascata: Contribuição da Sub-Bacia para a Represa de Barra Bonita, Rio Tietê (SP) (Water Quality, Organic Loading and Nutrient Loading in the Mouth of Cascata Brook: The Subbasin...)

2016 ◽  
Vol 9 (1) ◽  
pp. 305
Author(s):  
Ivalde Belluta ◽  
Sílvio Alexandre Jesus ◽  
Márcio Piedade Vieira ◽  
Nelita Maria Corrêa ◽  
Vera Lúcia Mores Rall ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Nutrient Loading ◽  
Microbiological Analysis ◽  
Organic Loading ◽  
Flow Measurements ◽  
Two Samples

O estudo das cargas orgânica e de nutrientes de uma sub-bacia hidrográfica é importante para quantificar o fluxo de energia ao longo de um rio até que chegue a um reservatório ou uma barragem. O objetivo deste estudo foi estimar a carga orgânica (CO) e as cargas de nitrogênio (CN) e fósforo (CP) na foz da sub-bacia do córrego da Cascata e avaliar a qualidade da água e sua contribuição na eutrofização do reservatório de Barra Bonita (rio Tietê, SP). Foram coletadas mensalmente (de maio/2011 a junho/2012) amostras de água e medidas de vazão (V) na foz do córrego da Cascata, junto ao córrego Água Fria. Foram determinados o pH e as concentrações de carbono orgânico total (COT), nitrogênio total (NT), fósforo total (PT), oxigênio dissolvido (OD); a demanda bioquímica de oxigênio (DBO5,20); a condutividade elétrica (CE); o cloreto (Cl). Foram realizadas análises microbiológica (coliformes termotolerantes (CT)) e estatística descritiva. Avaliou-se a influência do índice pluviométrico (IP) na vazão e nas cargas dos parâmetros analisados. A V média mensal na foz do córrego da Cascata foi de 81,5 L.s-1; a CO foi 1,35 g.s-1 ou 3,6 g.s-1 em OD; a CN, 0,21 g.s-1 e a CP, 0,007 g.s-1. A CE esteve acima do normal (100 uS/cm) em duas coletas, e a CT atingiu 1,1x105 NMP em uma amostragem. As sub-bacias contribuem para a eutrofização, e seu controle evita aumento de nutrientes em suas águas. O córrego da Cascata possui boa qualidade de água, e eventuais lançamentos de resíduos são facilmente assimilados e passíveis de controle.    A B S T R A C T The study of organic and nutrient loading of a subbasin is important to quantify the flow of energy along a river until it reaches a reservoir or dam. The goal of this study was to estimate the organic loading (OL) and the nitrogen (NL) and phosphorus (PL) loadings in the mouth of the subbasin of Cascata brook and assess the water quality and its contribution to the eutrophication of Barra Bonita Reservoir (Tietê River, São Paulo-Brazil). Water samples and flow measurements (F) were collected every month (from May/2011 to June/2012) at the mouth of Cascata brook. It were analyzed: the pH and total organic carbon concentration (TOC); the total nitrogen (TN); the total phosphorus (TP); the dissolved oxygen (DO); the biochemical oxygen demand (BOD5,20); the electrical conductivity (EC); and the chloride (Cl). Microbiological analysis (thermotolerant coliforms (TC)) and descriptive statistics were performed. The influence of the precipitation index (PI) over the flow and over the parameters loads was analyzed. The average monthly V at the mouth of Cascata brook was 81,5 L.s-1; the OL was 1,35 g.s-1 or 3,6 g.s-1 in DO; the NL, 0,21 g.s-1 and the PL 0,007 g.s-1. The EC was above the standards (100 µS.cm-1) in two samples, and the TC reached 1,1.x.105 MPN in one of the samples. The subbasins contribute to the eutrophication and maintaining them prevents the increase of nutrients in their waters. The Cascata brook has good water quality, and any waste releases are easily assimilated and can be controlled. Keywords: Eutrophication, total organic carbon, total nitrogen, total phosphorus.  

scholarly journals Increasing Chlorophyll a Amid Stable Nutrient Concentrations in Rhode Island Lakes and Reservoirs

2020 ◽  
Author(s):  
J. W. Hollister ◽  
D. Q. Kellogg ◽  
B. J. Kreakie ◽  
S. Shivers ◽  
W. B. Milstead ◽  
...  
Keyword(s):  
United States ◽  
Water Quality ◽  
Rhode Island ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Quality Data ◽  
Recent Analysis ◽  
Lakes And Reservoirs ◽  
Water Quality Trends

Addressing anthropogenic impacts on aquatic ecosystems is a focus of lake management. Controlling phosphorus and nitrogen can mitigate these impacts, but determining management effectiveness requires long-term datasets. Recent analysis of the LAke multi-scaled GeOSpatial and temporal database for the Northeast (LAGOSNE) United States found stable water quality in the northeastern and midwestern United States, however, sub-regional trends may be obscured. We analyze a sub-regional (i.e., 3000 km2) trend with the University of Rhode Island’s Watershed Watch Volunteer Monitoring Program (URIWW) dataset. URIWW has collected water quality data on Rhode Island lakes and reservoirs for over 25 years. The LAGOSNE and URIWW datasets allow for comparison of water quality trends at regional and sub-regional extents, respectively. We assess regional (LAGOSNE) and state (URIWW) trends with yearly mean anomalies calculated on a per-station basis. Sub-regionally, temperature and chlorophyll a increased from 1993 to 2016. Total nitrogen shows a weak increase driven by low years in the early 1990s. Total phosphorus and the nitrogen:phosphorus ratio (N:P) were stable. At the regional scale, the LAGOSNE dataset shows similar trends to prior studies of the LAGOSNE with chlorophyll a, total nitrogen, total phosphorus, and N:P all stable over time. In short, algal biomass, as measured by chlorophyll a in Rhode Island lakes and reservoirs is increasing, despite stability in total nitrogen, total phosphorus, and the nitrogen to phosphorus ratio. This analysis suggests an association between lake temperature and primary production. Additionally, we demonstrate both the value of long-term monitoring programs, like URIWW, for identifying trends in environmental condition, and the utility of site-specific anomalies for analyzing for long-term water quality trends.

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