Spatiotemporal variations and gradient functions of water turbidity in shallow lakes

Liu, Xiujun; Xia, Jihong; Zu, Jiayi; Zeng, Zhuo; Li, Yan; Li, Jingjiang; Wang, Qihua; Liu, Zewen; Cai, Wangwei

doi:10.1016/j.ecolind.2023.109928

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…With the use of the turbidity maps, we found that the turbidity in the lake is higher during the dry season than in the wet season. Lower turbidity during the wet season can be explained by the higher water level and enhanced water exchange (Liu et al, 2023) which decreases the sediment settlement and resuspension.…”

Section: Discussionmentioning

confidence: 99%

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Mapping and Assessment of the Spatial and Temporal Distribution of Turbidity in Lake Buhi From Sentinel-2 Images Using Geographically Weighted Regression and Normalized Difference Turbidity Index

Amaro,

Cortez,

Medina

et al. 2024

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Water quality monitoring is vital in ensuring the suitability of Lake Buhi for aquaculture and recreational activities. However, with the limitations of traditional monitoring methods, the Bureau of Fisheries and Aquatic Resources (BFAR) cannot comprehensively characterize the spatial and temporal water quality patterns in the lake. With the development of remote sensing methods, this study aimed to describe the spatial and temporal variability of turbidity in Lake Buhi in 2020 using Geographically Weighted Regression (GWR) and the Normalized Difference Turbidity Index (NDTI) applied to Sentinel-2 images. GWR provided accurate estimates of turbidity, with the results achieving an R2 value of 0.98 for the February image and 0.93 for October. GWR-derived turbidity was 2 used as an alternative to in situ data and then regressed with NDTI values to acquire turbidity models for dry and wet seasons. Upon validation, the best turbidity model for the dry (R2 = 0.59, RMSE = 0.60, MAE = 0.15) and wet (R2 = 0.49, RMSE = 1.22, MAE = 0.25) seasons produced acceptable results, hence, used to assess the spatial and temporal variability of turbidity in the lake throughout 2020. The analysis revealed that Lake Buhi is more turbid during the dry season than the wet season. Turbidity during the dry season is governed by its natural water flow, while it is heavily influenced by precipitation during the wet season.

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Section: Discussionmentioning

confidence: 99%

“…The distribution of turbidity during the wet season is highly influenced by the increased precipitation that increases the water exchange, transport, and consequently, turbidity (Liu et al, 2023). High water exchange and transportation explain the reduced turbidity variation during this season.…”

Section: Discussionmentioning

confidence: 99%

Mapping and Assessment of the Spatial and Temporal Distribution of Turbidity in Lake Buhi From Sentinel-2 Images Using Geographically Weighted Regression and Normalized Difference Turbidity Index

Amaro,

Cortez,

Medina

et al. 2024

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…The highest level of reduction was observed in the percentage of turbidity level reduction for the 6 g dose (91.50%), 7 g dose (95.71%), and 8 g dose (99.03%). In conclusion, the degree of efficacy of horn banana peel powder as a biocoagulant in decreasing the turbidity of water from a dug well by 99.03%, specifically at a dose of 8 g. Turbidity is one of the physical characteristics that is frequently employed as a groundwater quality indicator (Liu et al, 2023). There has been extensive research on groundwater turbidity levels that are higher than the maximum allowable limit for drinking water.…”

Section: Reduced Degree Of Turbiditymentioning

confidence: 99%

“…Turbidity is one of the physical characteristics that is frequently employed as a groundwater quality indicator (Liu et al, 2023). There has been extensive research on groundwater turbidity levels that are higher than the maximum allowable limit for drinking water.…”

Section: Reduced Degree Of Turbiditymentioning

confidence: 99%

Horn banana peel powder biocoagulants in lowering the turbidity of water

Priyadi,

A’yun,

Navianti

et al. 2024

Journal of Multidisciplinary Academic and Practice Studies

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Purpose: In response to contemporary global issues like pollution, global warming, and the loss of natural resources, the circular bioeconomy has been proposed. Using organic waste as a bioagulant facilitates the shift to a circular and sustainable bioeconomy. For homes that use well water that has been excavated, the concentration of chemical coagulants must be taken into consideration. The purpose of this study is to use banana peel powder as a biocoagulant to lower the turbidity level of water from a dug well. Research methodology: The Paired Sample T-Test and the ANOVA test with Welsh correction were used to examine the average change in turbidity 0.000 <0.05 was the ? value obtained. Results: The Post Hoc Games-Howell test findings revealed a noteworthy distinction between the treatment groups. This study concludes that the biocoagulant made of powdered banana horn can lower turbidity to a level that satisfies health standards.

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“…3D), signi cant reductions were achieved after the MA (86,5%) (p < 0.001) and CW (78,8%) (p < 0.001) stages. High turbidity is responsible for the increased oxygen consumption usually associated with high sediment loads (Liu et al, 2023).…”

Section: Analytical Characterizationmentioning

confidence: 99%

Sequential use of Microalgae and Constructed Wetlands and its potential to remove organic load, toxicity and pharmaceuticals from urban wastewaters

de Oliveira,

Lutterbeck,

Schneider

et al. 2024

Preprint

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The present study aimed at to evaluate the performance of integrated system composed of microalgae (MA) and constructed wetlands (CW). The MA production tank was set up as a raceway type and microalgae of the genus Chlorella were inoculated, while the CW was set up inspired by the first stage of the French model and vegetated with the macrophytes Chrysopogon zizanioides, Typha domingensis and Dracaena trifaciata. The Hydraulic Retention Time in each unit was of 7 days, totaling 14 days of treatment. Promising results were obtained regarding the reductions of dissolved organic carbon (67.2%) and Total N (68.6%). The treatment was also able to fully remove the acute ecotoxicity against Dapnhia magna and the genotoxicity in the A. cepa test assay. Chromatographic analysis showed the presence of 9 pharmaceuticals in the raw wastewaters, whereas after the CW unit only residuals of dipyrone (1%) were still detected. Future recommendations include the investigation of the main removal mechanisms of the pharmaceuticals and improvements of the separation process of the MA.

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Spatiotemporal variations and gradient functions of water turbidity in shallow lakes

Cited by 8 publications

References 38 publications

Mapping and Assessment of the Spatial and Temporal Distribution of Turbidity in Lake Buhi From Sentinel-2 Images Using Geographically Weighted Regression and Normalized Difference Turbidity Index

Mapping and Assessment of the Spatial and Temporal Distribution of Turbidity in Lake Buhi From Sentinel-2 Images Using Geographically Weighted Regression and Normalized Difference Turbidity Index

Horn banana peel powder biocoagulants in lowering the turbidity of water

Sequential use of Microalgae and Constructed Wetlands and its potential to remove organic load, toxicity and pharmaceuticals from urban wastewaters

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