Monitoring and Forecasting of Water Quality and Fish Population Using Stacked LSTM-GRU in IOT Environment

2021 ◽  
Author(s):  
Venkatachalam Murugan ◽  
Jeyaswamidoss Jeba Emilyn
Keyword(s):  
Water Quality ◽  
Fish Population ◽  
Monitoring And Forecasting

MARINE-EO project: Monitoring and forecast of eutrophication around fish farms, a Maliakos Gulf case (Eastern Mediterranean).

2021 ◽  
Author(s):  
Amandine Declerck ◽  
Matthias Delpey ◽  
Thibaut Voirand ◽  
Ioanna Varkitzi
Keyword(s):  
Water Quality ◽  
High Resolution ◽  
Real Time ◽  
Chlorophyll A ◽  
Satellite Observation ◽  
Risk Level ◽  
Fish Farms ◽  
Ocean Modelling ◽  
Monitoring And Forecasting

<p>Keywords: eutrophication; high resolution ocean modeling ; Chla satellite data ; biogeochemistry</p><p>Maliakos Gulf corresponds to mesotrophic waters that can reach eutrophic conditions and are occasionally subject to Harmful Algal Blooms (HAB) (Varkitzi et al. 2018). At the same time, it is an important fish farming and aquaculture production area. A large issue is thus related to the monitoring and forecasting of the risk of occurrence of algae blooms in the Gulf. For this purpose, the present study couples predictions from a high-resolution numerical ocean model with satellite observation to improve the monitoring and anticipation of threats for the local fish farms induced by occasional eutrophication.</p><p>This solution is developed in the frame of the MARINE-EO project (https://marine-eo.eu/). It combines satellite observation with high-resolution ocean modelling to provide detailed information as a support to fish farms management and operations. It is implemented in an operational platform, which provides continuous information in real time as well as short term predictions. The deployed solution uses CMEMS physical products as an input data and offers to refine this solution in order to provide a local information on site using a downscaling strategy. High resolution satellite products and ocean modelling allow to include the impact of local coastal processes on currents and water quality parameters to provide a proper monitoring and forecasting solution at the scale of a specific fish farm.</p><p>To model specific eutrophication processes, a NPZD (Nutrients-Phytoplankton-Zooplankton-Detritus) biogeochemical model is used. Included in the MOHID Water modelling system, the water quality module (Mateus, 2006) considering 18 properties: nutrients and organic matter (nitrogen, phosphorus and silica biogeochemical cycles), oxygen and organisms (phytoplankton and zooplankton) was deployed in the western Aegean Sea. The simulated chlorophyll a concentrations are used to compute a risk level for the eutrophication occurrence. To complete this indicator, another risk level was based on the eutrophication variation following Primpas et al. (2010) formulation. In addition to model forecasts, ocean color observations from the Sentinel-2 MSI and Landsat-8 OLI sensors are used to provide high resolution chlorophyll a concentrations maps in case of bloom events. The processing chain uses the sixth version of the Quasi-Analytical Algorithm initially developed by Lee et al. (2002) and an empirical relation based on a database built using the HydroLight software to compute chlorophyll a concentration.</p><p>Two past eutrophication events monitored in situ (Varkitzi et al. 2018) were studied to assess the accuracy of the developed tool. Although few in situ data were available on environmental input (as rivers flow and nutrient concentrations), it was possible using statistics to reproduce qualitatively these blooms. Finally, an operational demonstration was conducted during 2 months of the 2020 autumn season, to showcase real time monitoring and predictive perspectives.</p>

scholarly journals Influence of water management in lowland region of the Dyje River on water biocoenoses

2010 ◽  
Vol 58 (4) ◽  
pp. 269-276 ◽  
Author(s):  
Ivo Sukop
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Fish Species ◽  
Fish Population ◽  
Danube River ◽  
Trophic Conditions ◽  
The Danube River ◽  
Poor Water Quality ◽  
Influence Of Water ◽  
Rare Fish

This work contains the results of influence of water management in lowland region of the Dyje River on water biocenoses. Research was carried out in 1977–1984, when building of the three reservoirs were started. The effect of the newly built reservoirs on the biocoenoses of the reach immediately below it was mainly beneficial. Before the reservoir near Nové Mlýny was bulit, the fish population of the Dyje River was regularly threatened by poor water quality. After completion of the three reservoirs in 1989 the pollution brought by the Dyje River was largely removed by the purification processes in the reservoirs, so that the Dyje River became cleaner than it was. The better trophic conditions and water quality downstream of the reservoirs were reflected in increased fish catches and higher fish weights. The newly built fish passes make possible migration of rare fish species from the Danube River as far as to reservoirs the Nové Mlýny.

Problems in determining water quality criteria for freshwater fisheries

1972 ◽  
Vol 180 (1061) ◽  
pp. 439-449 ◽  
Keyword(s):  
Water Quality ◽  
Quality Criteria ◽  
Fish Population ◽  
Toxicity Tests ◽  
Published Data ◽  
Water Quality Criteria ◽  
Lethal Level ◽  
Population Information ◽  
Acute Toxicity Tests ◽  
The Common

Accurate water quality criteria are essential if fisheries are to be protected without unnecessary restrictions being imposed on the discharge of industrial and domestic effluents. There is a considerable literature on the effects of pollutants on fish, but even for the common poisons it is difficult to establish more than tentative criteria from the published data. Acute toxicity tests can be used to measure the effect of chemical and physical variables on the toxicity of poisons and on the resistance of fish to them. Results from sublethal tests can give an insight into the mechanism of toxic action and experiments should be designed to show the level of no adverse effect. Field observations can provide valuable information on the levels of pollutants at which fisheries are unaffected and, in some cases, the graded effect of increased pollution on the deterioration of a fish population. Information from all three sources are required for the preparation of water quality criteria, which should not be based on a single concentration, or ratio of a lethal level, but should indicate, where possible, the range of concentration within which fisheries show a progressive deterioration.

scholarly journals Short Communication: The effect of water quality on the population density of Pterygoplichthys pardalis in the Ciliwung River, Jakarta, Indonesia

2020 ◽  
Vol 21 (9) ◽  
Author(s):  
Dewi Elfidasari ◽  
Fahma Wijayanti ◽  
HURUNIN FATHONAH MUTHMAINAH
Keyword(s):  
Water Quality ◽  
Population Density ◽  
Short Communication ◽  
Research Result ◽  
Water Clarity ◽  
Fish Population ◽  
Measured Parameter ◽  
Average Value ◽  
Effect Of Water ◽  
Quality Of Waters

Abstract. Elfidasari D, Wijayanti F, Muthmainah HF. 2020. Short Communication: The effect of water quality on the population density of Pterygoplichthys pardalis in the Ciliwung River, Jakarta, Indonesia. Biodiversitas 21: 4100-4106. The quality of waters is determined by the average value of the measured parameter range with a direct impact on aquatic biota due to pollution. The Ciliwung River is one of the polluted waters in Jakarta, which is the habitat for Pterygoplichthys pardalis (plecos catfish) that dominates the river. This study, therefore, aimed to analyze the influence of Ciliwung River quality on the density of P. pardalis. Data were obtained by measuring  DO, BOD, pH, rainfall, temperature, water clarity, turbidity, current velocity, river depth, ammonia, and phosphate levels, as well as the fish population density. The research result showed that the density of P. pardalis population was greatly influenced by the DO, BOD, pH, turbidity, and ammonia parameters of the Ciliwung River. The waters quality with the DO condition of 2.6 mg/L, BOD of 1,2 mg/L, pH of 7.2, the turbidity of 3.85 FTU and ammonia of 2.65 ppm were the optimum conditions for the highest population density of P. pardalis in the Ciliwung River

scholarly journals Guppy fish (Poecilia reticulata Peters) population structure in Gajah Putih River, Surakarta, Central Java

2016 ◽  
Vol 6 (2) ◽  
pp. 103-109 ◽  
Author(s):  
YOSA KALAM PANJAITAN ◽  
SUCAHYO SUCAHYO ◽  
FERDY SEMUEL RONDONUWU
Keyword(s):  
Water Quality ◽  
Population Structure ◽  
Poecilia Reticulata ◽  
Environmental Parameters ◽  
Fish Population ◽  
Pollution Level ◽  
Central Java ◽  
Fish Samples ◽  
The Difference ◽  
Guppy Fish

Panjaitan YK, Sucahyo, Rondonuwu FS. 2016. Guppy fish (Poecilia reticulata Peters) population structure in Gajah Putih River, Surakarta, Central Java. Bonorowo Wetlands 6: 103-109. The study of fish population structure is one strategy to know the condition of fish population and water pollution level in a waters area. Guppy fish (Poecilia reticulata Peters) can live in various conditions of water quality, especially in rivers. The Gajah Putih River flowing through Surakarta, Central Java is the habitat of guppy fish. The number of residential and factory activities that dump waste into the Gajah Putih River, causing a decrease in river water quality. Research on the population structure of Guppy fish in Gajah Putih river, Surakarta City was conducted between September and December 2014. Sampling was done purposively where the Guppy fish was found. There are 10 locations along the Gajah Putih River for sampling, each 300m away. At each location, a random sample of 30 fish was collected, then sorted by age and sex. There are also measurements of energy reserves in fish samples, as well as physical and chemical factors of water. Based on temperature, DO, pH TS and COD, the environmental conditions of the Gajah Putih River waters can still be tolerated by Guppy fish. The difference of environmental parameters between stations is relatively small, so it does not affect the difference of population structure of Guppy fish between stations.

scholarly journals COMPARISONS OF ESTUARINE MANAGEMENT NEEDS OF A TROPICAL PACIFIC MEXICAN HARBOUR AND A TEMPERATE CALIFORNIA HARBOUR

2018 ◽  
Vol 19 ◽  
pp. 21-38 ◽  
Author(s):  
Dorothy F. Soule ◽  
Penny A. Morris ◽  
John D. Soule
Keyword(s):  
Water Quality ◽  
Population Growth ◽  
Historical Development ◽  
Southern California ◽  
Fish Population ◽  
Economic Importance ◽  
Thermal Gradients ◽  
Point Conception ◽  
Estuarine Management ◽  
Excessive Nutrients

Two areas of the eastern Pacific are compared, the southern California wetlands south of Point Conception and Mazatlan, Mexico. The historical development of both areas is important in considering their present biological status. Southern California has been subjected to intensive population growth and urbanization while Mazatlan has remained relatively unchanged. Both areas are compared biologically in regards to the fish population, thermal gradients in the harbors, salinity, nitrate, nitrite and phosphate distributions. The economic importance of the harbors is recognized, however it is essential that measures are taken to restore or retain existing wetlands that are associated with the harbors. The harbors can serve as shelters for various organisms if water quality can either be maintained (as in the case of Mazatlan) or improved, and if input of toxic and excessive nutrients is limited.

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