Water Quality Assessment and Eutrophic Classification of Hanoi Lakes Using Different Indices

Ha, Nguyen Thi Thu; Dzung, Dinh Tien; Hang, Ho Thi Thuy; Huy, Trinh Quang; Tu, Nguyen Ngoc

doi:10.31817/vjas.2021.4.4.03

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Trophic classifications for lakes are an important issue concerning lake ecosystem function for aquatic scientists [20][21][22][23]. General functional features exist among the lakes in each of the main categories of trophic status.…”

Section: 2354mentioning

confidence: 99%

Remote Sensing for Water Quality Monitoring – A Study Case for the Marateca Reservoir, Portugal

Alegria¹,

Albuquerque²

2023

Preprint

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Continuous water resources monitoring is needed for sustainable urban water supply. Remote sensing techniques have proven useful for monitoring some water qualitative parameters with optical characteristics. The study area was the Marateca reservoir in central inland Portugal. The aims were the following: (1) to explore the water quality parameters at the monitoring points of the Marateca reservoir that may explain the event; (2) to validate optical water quality parameters with the monitoring points data; and (3) to model the reservoir water characteristics regarding its deepness, trophic state, and turbidity. The parameters total phosphorus, total nitrogen, and chlorophyll-a were used to compute a trophic level index. The Sentinel-2 imagery was used to compute spectral indices and bands image ratio; to obtain spectral signatures for the monitoring points, and to model water characteristics. The water parameters were above the recommended values at the reservoir entry point from the Ocreza River. The reservoir trophic level was Hypereutrophic and Eutrophic. The spectral signatures confirmed a Hypereutrophic pattern in the entry point. The Marateca reservoir’s water characteristics modeling forecasted problematic zones by contamination. The methodological approach developed can be easily applied to other reservoirs and is a key support tool for decision-makers.

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Section: 2354mentioning

confidence: 99%

Remote Sensing for Water Quality Monitoring – A Study Case for the Marateca Reservoir, Portugal

Alegria¹,

Albuquerque²

2023

Preprint

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show abstract

“…Trophic classifications for lakes are an important concern for aquatic scientists regarding the functioning of lake ecosystems [27][28][29][30][31]. In the realm of limnology and environmental science, the evaluation of water bodies' health and nutrient enrichment is crucial.…”

Section: Water Quality Parameters-monitoring and Validation Datamentioning

confidence: 99%

Remote Sensing for Water Quality Monitoring—A Case Study for the Marateca Reservoir, Portugal

Alegria,

Albuquerque

2023

Geosciences

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Continuous monitoring of water resources is essential for ensuring sustainable urban water supply. Remote sensing techniques have proven to be valuable in monitoring certain qualitative parameters of water with optical characteristics. This survey was conducted in the Marateca reservoir located in central inland Portugal, after a major event that killed a considerable number of fish. The objectives of the study were as follows: (1) to define a pollution spectral signature specific to the Marateca reservoir that could shed light on the event; (2) to validate the spectral water’s quality characteristics using the data collected in five gauging points; and (3) to model the characteristics of the reservoir water, including its depth, trophic state, and turbidity. The parameters considered for analysis were total phosphorus, total nitrogen, and chlorophyll-a, which were used to calculate a trophic level index. Sentinel-2 imagery was employed to calculate spectral indices and image ratios for specific bands, aiming at the definition of spectral signatures, and to model the water characteristics in the reservoir. The trophic level index acquired from each of the five gauging points was used for validation purposes. The reservoir’s trophic level was classified as hypereutrophic and eutrophic, indicating its sensitivity to contamination. The developed methodological approach can be easily applied to other reservoirs and serves as a crucial decision-making tool for policymakers.

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Microbial contamination in surface water in urban lakes of Hanoi city, Vietnam

Da Le,

Hoang,

Nguyen

et al. 2024

Urban Water Journal

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Water Quality Assessment and Eutrophic Classification of Hanoi Lakes Using Different Indices

Cited by 3 publications

References 9 publications

Remote Sensing for Water Quality Monitoring – A Study Case for the Marateca Reservoir, Portugal

Remote Sensing for Water Quality Monitoring – A Study Case for the Marateca Reservoir, Portugal

Remote Sensing for Water Quality Monitoring—A Case Study for the Marateca Reservoir, Portugal

Microbial contamination in surface water in urban lakes of Hanoi city, Vietnam

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