Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers
Mass wasting events, such as channelized debris flows, can result in heavy sediment fluxes in river systems. On July 30, 2024, a catastrophic debris flow in Wayanad, India, resulted in over 252 fatalities, and deposited approximately 5 million m ^3 of sediments into the Chaliyar River Valley. We mea...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Communications |
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| Online Access: | https://doi.org/10.1088/2515-7620/adb8a7 |
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| author | Ali P Yunus Adin Ishan N S Magesh K S Sajinkumar Gianvito Scaringi Srikrishnan Siva Subramanian Thomas Oommen |
| author_facet | Ali P Yunus Adin Ishan N S Magesh K S Sajinkumar Gianvito Scaringi Srikrishnan Siva Subramanian Thomas Oommen |
| author_sort | Ali P Yunus |
| collection | DOAJ |
| description | Mass wasting events, such as channelized debris flows, can result in heavy sediment fluxes in river systems. On July 30, 2024, a catastrophic debris flow in Wayanad, India, resulted in over 252 fatalities, and deposited approximately 5 million m ^3 of sediments into the Chaliyar River Valley. We measured sediment fluxes in Chaliyar before, during, and after the event through in situ water sample analysis. Suspended sediment concentrations (SSC's) during June and July 2024, prior to the debris flow, were highly variable, with peak values reaching 71.72 mg l ^−1 . On the day of the event, the debris flow perturbed the river channel, resulting in a rapid, two-order-of-magnitude spike in SSC compared to June–July averages. Within 48 h post-event, the SSC levels returned to background levels, underscoring the transient nature of this intense geomorphic activity. Our research provides valuable insights into the rapid sediment evacuation processes of small, steep rivers following major landslide events. |
| format | Article |
| id | doaj-art-24b8c697b0364e5bb1839b04a6a88391 |
| institution | DOAJ |
| issn | 2515-7620 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Communications |
| spelling | doaj-art-24b8c697b0364e5bb1839b04a6a883912025-08-20T03:16:26ZengIOP PublishingEnvironmental Research Communications2515-76202025-01-017303100210.1088/2515-7620/adb8a7Rapid evacuation of suspended sediment loads during landslides in steep gradient riversAli P Yunus0https://orcid.org/0000-0001-9545-0714Adin Ishan1https://orcid.org/0009-0004-3532-8329N S Magesh2K S Sajinkumar3Gianvito Scaringi4https://orcid.org/0000-0003-3505-7456Srikrishnan Siva Subramanian5https://orcid.org/0000-0003-4004-0894Thomas Oommen6Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research Mohali, Mohali 140306, Punjab, IndiaDepartment of Earth and Environmental Sciences, Indian Institute of Science Education and Research Mohali, Mohali 140306, Punjab, IndiaCentre for Water Resources Development and Management, Kozhikode, Kerala 673571, IndiaDepartment of Geology, University of Kerala , Thiruvananthapuram 695581, Kerala, IndiaInstitute of Hydrogeology, Engineering Geology and Applied Geophysics, Faculty of Science, Charles University , Prague 12800, Czech RepublicCentre of Excellence in Disaster Mitigation and Management, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, IndiaDepartment of Geology and Geological Engineering, University of Mississippi , University, MS 38677, United States of AmericaMass wasting events, such as channelized debris flows, can result in heavy sediment fluxes in river systems. On July 30, 2024, a catastrophic debris flow in Wayanad, India, resulted in over 252 fatalities, and deposited approximately 5 million m ^3 of sediments into the Chaliyar River Valley. We measured sediment fluxes in Chaliyar before, during, and after the event through in situ water sample analysis. Suspended sediment concentrations (SSC's) during June and July 2024, prior to the debris flow, were highly variable, with peak values reaching 71.72 mg l ^−1 . On the day of the event, the debris flow perturbed the river channel, resulting in a rapid, two-order-of-magnitude spike in SSC compared to June–July averages. Within 48 h post-event, the SSC levels returned to background levels, underscoring the transient nature of this intense geomorphic activity. Our research provides valuable insights into the rapid sediment evacuation processes of small, steep rivers following major landslide events.https://doi.org/10.1088/2515-7620/adb8a7suspended sedimentsfluvial evacuationdebris flowssediment budgetWayanad |
| spellingShingle | Ali P Yunus Adin Ishan N S Magesh K S Sajinkumar Gianvito Scaringi Srikrishnan Siva Subramanian Thomas Oommen Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers Environmental Research Communications suspended sediments fluvial evacuation debris flows sediment budget Wayanad |
| title | Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| title_full | Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| title_fullStr | Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| title_full_unstemmed | Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| title_short | Rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| title_sort | rapid evacuation of suspended sediment loads during landslides in steep gradient rivers |
| topic | suspended sediments fluvial evacuation debris flows sediment budget Wayanad |
| url | https://doi.org/10.1088/2515-7620/adb8a7 |
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