Confined and mined: anthropogenic river modification as a driver of flood risk change
Abstract Rivers are often confined by structures and subjected to aggregate mining. In dynamic rivers, these interventions cause changes to riverbed and bank topography that potentially cause changes in hydraulics and flood risk. Repeat, system-scale, high-resolution topographic surveys of the grave...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-01-01
|
| Series: | npj Natural Hazards |
| Online Access: | https://doi.org/10.1038/s44304-024-00051-6 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823863265887780864 |
|---|---|
| author | Laura Quick R. D. Williams R. J. Boothroyd T. B. Hoey P. L. M. Tolentino C. MacDonell E. Guardian J. Reyes C. Sabillo J. Perez C. P. C. David |
| author_facet | Laura Quick R. D. Williams R. J. Boothroyd T. B. Hoey P. L. M. Tolentino C. MacDonell E. Guardian J. Reyes C. Sabillo J. Perez C. P. C. David |
| author_sort | Laura Quick |
| collection | DOAJ |
| description | Abstract Rivers are often confined by structures and subjected to aggregate mining. In dynamic rivers, these interventions cause changes to riverbed and bank topography that potentially cause changes in hydraulics and flood risk. Repeat, system-scale, high-resolution topographic surveys of the gravel-bed Bislak River, the Philippines, are used to quantify annual morphological change and, using two-dimensional hydraulic modelling, to simulate changes to flood risk. Aggregate mining exports sediment and creates pitted topography, and embankments cause both deeper channels and disconnect the river from its floodplain. The consequently increased channel capacity reduces flood risk, with up to a 5% decrease in inundated areas for 10- to 100-year return periods. Sediment deprivation also increases bed shear stress that can induce scour, infrastructure damage and increased flood impacts. Rising global floodplain populations and increasing demand for aggregate ensure that sustainably managing geomorphologically dynamic rivers to support floodplain development and mitigate flood impacts remains a pertinent challenge. |
| format | Article |
| id | doaj-art-474958a40a2c4f6cb2c862b96591974e |
| institution | Kabale University |
| issn | 2948-2100 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Natural Hazards |
| spelling | doaj-art-474958a40a2c4f6cb2c862b96591974e2025-02-09T12:13:00ZengNature Portfolionpj Natural Hazards2948-21002025-01-012111110.1038/s44304-024-00051-6Confined and mined: anthropogenic river modification as a driver of flood risk changeLaura Quick0R. D. Williams1R. J. Boothroyd2T. B. Hoey3P. L. M. Tolentino4C. MacDonell5E. Guardian6J. Reyes7C. Sabillo8J. Perez9C. P. C. David10School of Geographical and Earth Sciences, University of GlasgowSchool of Geographical and Earth Sciences, University of GlasgowSchool of Geographical and Earth Sciences, University of GlasgowDepartment of Civil and Environmental Engineering, Brunel University LondonSchool of Geographical and Earth Sciences, University of GlasgowSchool of Geographical and Earth Sciences, University of GlasgowUniversity of the Philippines DilimanUniversity of the Philippines DilimanUniversity of the Philippines DilimanUniversity of the Philippines DilimanUniversity of the Philippines DilimanAbstract Rivers are often confined by structures and subjected to aggregate mining. In dynamic rivers, these interventions cause changes to riverbed and bank topography that potentially cause changes in hydraulics and flood risk. Repeat, system-scale, high-resolution topographic surveys of the gravel-bed Bislak River, the Philippines, are used to quantify annual morphological change and, using two-dimensional hydraulic modelling, to simulate changes to flood risk. Aggregate mining exports sediment and creates pitted topography, and embankments cause both deeper channels and disconnect the river from its floodplain. The consequently increased channel capacity reduces flood risk, with up to a 5% decrease in inundated areas for 10- to 100-year return periods. Sediment deprivation also increases bed shear stress that can induce scour, infrastructure damage and increased flood impacts. Rising global floodplain populations and increasing demand for aggregate ensure that sustainably managing geomorphologically dynamic rivers to support floodplain development and mitigate flood impacts remains a pertinent challenge.https://doi.org/10.1038/s44304-024-00051-6 |
| spellingShingle | Laura Quick R. D. Williams R. J. Boothroyd T. B. Hoey P. L. M. Tolentino C. MacDonell E. Guardian J. Reyes C. Sabillo J. Perez C. P. C. David Confined and mined: anthropogenic river modification as a driver of flood risk change npj Natural Hazards |
| title | Confined and mined: anthropogenic river modification as a driver of flood risk change |
| title_full | Confined and mined: anthropogenic river modification as a driver of flood risk change |
| title_fullStr | Confined and mined: anthropogenic river modification as a driver of flood risk change |
| title_full_unstemmed | Confined and mined: anthropogenic river modification as a driver of flood risk change |
| title_short | Confined and mined: anthropogenic river modification as a driver of flood risk change |
| title_sort | confined and mined anthropogenic river modification as a driver of flood risk change |
| url | https://doi.org/10.1038/s44304-024-00051-6 |
| work_keys_str_mv | AT lauraquick confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT rdwilliams confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT rjboothroyd confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT tbhoey confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT plmtolentino confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT cmacdonell confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT eguardian confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT jreyes confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT csabillo confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT jperez confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange AT cpcdavid confinedandminedanthropogenicrivermodificationasadriveroffloodriskchange |