Turbidity dynamics in Indian peninsular river mouths derived from Kd490 reveals key anthropogenic drivers

Large rivers, which act as natural integrators of surface processes, contribute massive volume of terrestrial materials to the coastal oceans. However, the accelerated climate warming and increasing anthropogenic activities recorded in recent years have been severely affecting the hydrologic and phy...

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Bibliographic Details
Published in:The Science of the total environment 2023-10, Vol.896, p.165162-165162, Article 165162
Main Authors: Nukapothula, Sravanthi, Yunus, Ali P., Kaushal, Sahil, Chen, Chuqun, Narayana, A.C.
Format: Article
Language:English
Subjects:
Anthropocene
climate
Diffuse attenuation coefficient
environment
land use
Peninsular rivers of India
quantitative analysis
rain
River discharge
river flow
rivers
runoff
sediment contamination
spectrometers
time series analysis
Turbidity
Water transparency
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Summary:Large rivers, which act as natural integrators of surface processes, contribute massive volume of terrestrial materials to the coastal oceans. However, the accelerated climate warming and increasing anthropogenic activities recorded in recent years have been severely affecting the hydrologic and physical regimes of river systems. These changes have a direct impact on river discharge and runoff, some of which are occurred rapidly in the past two decades. Here, we present a quantitative analysis on the effects of changes in surface turbidity at coastal river mouths using diffuse attenuation coefficient at 490 nm (Kd490) as a proxy of turbidity for six major Indian peninsular rivers. The time series (2000−2022) trends of Kd490 obtained from Moderate Resolution Imaging Spectrometer (MODIS) images shows a significant decreasing trend in Kd values (p 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.165162