Investigative monitoring in the context of detecting anthropogenic impact on an epipotamal river

2008 ◽  
Vol 57 (7) ◽  
pp. 1023-1030 ◽  
Author(s):  
S. Winkler ◽  
M. Zessner ◽  
E. Saracevic ◽  
K. Ruzicka ◽  
N. Fleischmann ◽  
...  
Keyword(s):  
Water Quality ◽  
System Analysis ◽  
Water Quality Monitoring ◽  
Monitoring Station ◽  
Online Data ◽  
Emission Data ◽  
Additional Information ◽  
River Stretch ◽  
Data Assessment ◽  
One Year

In the context of an investigative monitoring programme a monitoring system comprising of a water quality monitoring station and a camera station has been installed and operated for more than one year. The monitoring target was to investigate changes of water quality which can be related to a repeated occurrence of foam, observed at a river stretch downstream the monitoring station. The extent and frequency of foam buildup was recorded by means of the camera station. The analysis of the online data clearly showed that some of the measured parameters can be used as indicators for specific discharges, which from additional targeted investigations could be identified as contributors to the foaming problems. The continuous ammonium measurement could be used to detect nitrification problems of WWTPs discharging upstream of the monitoring station. By combining different data sources (emission data, operative and investigative monitoring data) additional information can be gained, which can be used for a comprehensive data assessment as well as a detailed system analysis.

WQMS: water quality monitoring station for IoT

2021 ◽  
Vol 35 (2) ◽  
pp. 79
Author(s):  
Sergio Diaz ◽  
Andres Molano ◽  
Christian Erazo ◽  
Juan C. Monroy
Keyword(s):  
Water Quality ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Monitoring Station

scholarly journals Macroalgal Bioindicators of Recovery from Eutrophication in a Tidal Lagoon Following Wastewater Diversion and Earthquake Disturbance

2019 ◽  
Vol 43 (2) ◽  
pp. 240-255 ◽  
Author(s):  
Neill Barr ◽  
John Zeldis ◽  
Kristin Scheuer ◽  
David Schiel
Keyword(s):  
Water Quality ◽  
Water Quality Monitoring ◽  
N Availability ◽  
Percent Cover ◽  
Macroalgal Biomass ◽  
Untreated Sewage ◽  
Wastewater Infrastructure ◽  
N Enrichment ◽  
One Year ◽  
Large Earthquakes

AbstractTogether, macroalgal tissue biochemical nitrogen indices (N-indices) and macroalgal abundance can be used as bioindicators of N-enrichment in estuaries. In this study, we examine the extent and rates of response of Ulva bioindicators during rapid N-enrichment perturbations in the eutrophic Avon-Heathcote Estuary (AHE) (Christchurch, New Zealand). With the diversion of the city’s wastewater discharge away from the estuary in March 2010, a ~ 90% reduction in the estuary’s N-concentration was expected. In turn, this was expected to reduce macroalgal biomass and improve the overall trophic condition of the estuary. We surveyed Ulva bioindicators over a five-year period spanning the diversion. There was a rapid (within one year) transition away from eutrophic condition reflected in N-indices (tissue-chlorophyll, -free amino acids, -N and -δ15N) following wastewater diversion, towards values corresponding with ‘cleaner’ water quality. This was accompanied by large reductions in Ulva percent cover, based on seasonal surveys conducted from 2001 to 2014. However, two large earthquakes in February and June 2011 caused a breakdown of the city’s wastewater infrastructure, resulting in overflows of untreated sewage into the estuary between February and November 2011. The re-enrichment of N and changes in N-sources (treated versus untreated sewage) were rapidly reflected in Ulva bioindicators, notably δ15N. Following repair of infrastructure, Ulva bioindicators again reverted towards a less eutrophic state. Overall, bioindicators were sensitive to changes in N-availability and N-source, and useful for identifying the position of algal populations on a eutrophic-to-oligotrophic gradient. These attributes demonstrated their utility as adjuncts to water quality monitoring and algal biomass surveys.

Ten Years of Operation of Rio De Janeiro'S Ipanema Submarine Outfall

1986 ◽  
Vol 18 (11) ◽  
pp. 177-187 ◽  
Author(s):  
E. R. Britto ◽  
E. P. Jordão ◽  
J. Semeraro ◽  
W. M. Castro
Keyword(s):  
Water Quality ◽  
Prestressed Concrete ◽  
Video Recording ◽  
Monitoring Program ◽  
Water Quality Monitoring ◽  
Sewer Network ◽  
Flow Through ◽  
One Year ◽  
The City ◽  
Water Uses

Monitoring and surveys of the Ipanema Submarine Outfall of the city of Rio de Janeiro have been practiced during the 10 years of the outfall operation. The outfall is a 2.4m diameter prestressed concrete pipeline, 4.3 km long, extending 3.3 km seaward to a depth of 27m. It discharges presently 6 m3/s average raw sewage flow, through a 450m long diffuser. A planned survey program was established in order to verify pipe conditions through periodical deep sea inspection, monitored by radio and video recording; this paper discusses the preventive and corrective maintenance of the outfall, especially the failures that occurred in 5 accidents. It discusses also the water quality monitoring program established one year before the outfall began its operation in 1975. A program had been prepared which established beneficial water uses, water quality standards required for protection of the uses,and a monitoring system which provides the input data for verifying compliance with the standards. Pre-discharge studies were conducted for one year prior to operation, to provide background data on the various parameters, and over 70 000 analyses were made during the 10 years of the outfall operation. This paper evaluates the results of grease, coliforms, and hydrobiological indicators, as the most representative parameters of water quality in the sea. It shows that a marked improvement has occurred in the water quality. It also shows that the beaches receive a great amount of pollution through the canals of Visconde de Albuquerque Avenue and Jardim de Alá (Rodrigo de Freitas Lagoon), due to sewage overflows from the sewer network and the storm-water networks. The importance of giving special attention to the sewer network in systems involving submarine outfalls is stressed.

Development of on-site fish exposure system placed in water quality monitoring stations along a river

2005 ◽  
Vol 52 (12) ◽  
pp. 275-282 ◽  
Author(s):  
T. Higashitani ◽  
K. Miyajima ◽  
N. Nakada ◽  
M. Yasojima ◽  
H. Tanaka ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Estrogenic Activity ◽  
Sewage Treatment ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Monitoring Station ◽  
Exposure System ◽  
Fish Exposure ◽  
Monitoring Stations

Estrogen-like substances have been suspected to cause feminization of wild fish in rivers in Japan. To elucidate the influence of estrogen-like substances on fish in river, we have started to develop the on-site continuous fish exposure system using medaka Oryzias latipes that were placed in water quality monitoring stations along a river. Adult male medaka were exposed to the river water in a glass exposure tank placed in the monitoring stations. Flow rate of water and water temperature were controlled at 30L/hour and 26°C respectively, and a light: dark cycle was maintained 16:8 hours. A commercial diet free from phyto-estrogens was fed 4 times in a day using automatic feeder. After 2-week exposure, hepatic vitellogenin concentration of each male medaka was measured. The exposure tests were repeatedly performed at both the upstream and the downstream of sewage treatment plants along the River Tama which is a representative urbanized river in Japan. At the control site Haijimabashi monitoring station, vitellogenin was not detected in male medaka. On the other hand, at the Ishihara monitoring station which is the most downstream in this test area, every male medaka were produced vitellogenin in the test performed in the spring of 2004. As the results of the water quality analysis, it could be inferred that the estrone derived from effluents of sewage treatment plants caused the feminization of male medaka. The reason why the concentrations of the estrone and the estrogenic activity using DNA recombinant yeast varied in proportion to the electric conductivity of river water measured at the water quality monitoring station. Furthermore, after continuous 2-week exposure, the vitellogenin production of male medaka was reduced similar to the decrease of the concentrations of the estrone and the estrogenic activity of river water.

scholarly journals Assessing the occurrence of cyanotoxins in two urban reservoirs through a community science monitoring program

2021 ◽  
Author(s):  
◽  
Emily C. Kinzinger
Keyword(s):  
Water Quality ◽  
High School Students ◽  
Monitoring Program ◽  
Water Quality Monitoring ◽  
Quality Parameters ◽  
Cyanobacterial Blooms ◽  
Environmental Drivers ◽  
School Students ◽  
One Year ◽  
Community Science

Cyanobacterial blooms are an ongoing threat to aquatic systems worldwide. These potentially toxic blooms have typically been observed in summer to early fall, but there are increasing reports of blooms in colder seasons. From the few studies available, weknow that blooms can produce toxins in the winter. The objective of this research was to assess the year-round presence, concentration, and environmental drivers of the cyanotoxins microcystin and cylindrospermopsin in two reservoirs located in Columbia, Missouri, USA. To fulfill this objective, I coordinated and managed the Reservoir Observer Student Scientists (ROSS) program. This community science initiative combined educating high school students about limnology and cyanobacterial blooms with training students hands-on to collect weekly water quality samples. Data for this project was collected over two years in Bethel Lake and one year in Stephens Lake. We found detectable concentrations of the cyanotoxins year-round. There was no relationship between microcystin nor cylindrospermopsin and chlorophyll-a in either reservoir. Presence and concentration of microcystin and cylindrospermopsin were related to physical water quality parameters in Bethel Lake. This study provides evidence for the necessity of year-round water quality monitoring.

scholarly journals Real-Time Water Quality Monitoring System- Analysis Of Pashan Lake, Maharashtra, India

2019 ◽  
Vol 8 (6) ◽  
pp. 2331-2335 ◽  
Keyword(s):  
Water Quality ◽  
Real Time ◽  
System Analysis ◽  
Water Quality Monitoring ◽  
Remote Access ◽  
Quality Monitoring ◽  
Quality Data ◽  
Water Quality Data ◽  
Notification System ◽  
Quality Status

Pashan Lake in Pune, Maharashtra, India is one of the ancient man-made lakes constructed during British era majorly as a source of water supply for the neighboring colony. Over a while, the lake has switnessed severe degradation of water quality owing to heavy deforestation on neighboring hills, hyacinth formation, industrial effluents, and various anthropogenics activities. A consistent rise in pollution is reported, making the lake water non-potable. Recently, the monitoring and analysis of the lake's water quality status are under consideration to check the suitability of water for drinking. Further, this can aid in planning suitable measures to reduce pollution levels. To address such need of real-time water quality data aforementioned, this paper proposes an online portable water quality monitoring and notification system. An Internet of things(IoT) based platform has been developed with the ability to sense, record, process and wirelessly transmit water quality data. Such platforms enable remote access to data about quality status of any water resource. Further, the developed system has been deployed in Pashan Lake and the results so obtained have been discussed.

WQMS: water quality monitoring station for IoT

2021 ◽  
Vol 35 (2) ◽  
pp. 79
Author(s):  
Andres Molano ◽  
Juan C. Monroy ◽  
Christian Erazo ◽  
Sergio Diaz
Keyword(s):  
Water Quality ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Monitoring Station
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