English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

High concentrations of suspended solids can cause water quality deterioration, leading to ecological degradation of the aquatic environment. In highly eutrophic waters, they are important carriers of pollutants and nutrients. Therefore, quantifying total suspended solids concentration () is critical for any water quality monitoring program. This study proposes two band ratio algorithms for estimatingin highly eutrophic lakes based on a data set of 180  in situ  samples of remote-sensing reflectance,, andmeasured simultaneously across 10 dates in four lakes and reservoirs in Hanoi (Vietnam). The  in situranges from 2.7 to 73.3 mg l −1 , averaging at 24.9 mg l −1 , and is highly correlated to water transparency (the correlation coefficient, = 0.73), chl- a  concentration ( = 0.78), and the trophic state index ( = 0.89). Our analyses demonstrate the appropriateness of the near-infrared/red spectral ratio,, model ( N  = 124) for estimatingin the study lakes (the determination coefficient, = 0.84). The model was then verified with a small error (the root mean square error, RMSE = 4.1 mg l −1 ) using independent multi-date-obtained data sets ( N  = 56). The model is further optimized to establish a regionalestimation model for Landsat 8/OLI and Sentinel 2/MSI bands using the 865 and 655 (or 665) nm bands. The band ratios showed reasonable estimations when applying to the respective spectral band ratios, i.e. the OLI’s band 5/band 4 ( = 0.58; RMSE = 7.7) and the MSI band 8/band 4 ( = 0.73; RMSE = 6.1).

Retrieval of total suspended solids from remote sensing reflectance in highly eutrophic lakes in Hanoi (Vietnam)