Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific)
Study region: The eastern coast of New Caledonia (SW Pacific). Study focus: The HydroThiem hydrological observatory is devoted to the study of the impact of invasive ungulate species and bushfires on water resources, erosion and water quality in a catchment used for drinking water. It includes (1) t...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581822002361 |
| _version_ | 1828161904421371904 |
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| author | Pierre Genthon Caroline Tramier Quentin Delvienne Pascal Dumas Nathalie Rouché Kavya Wijesuriya Jean-Jerôme Cassan Angelline Goué |
| author_facet | Pierre Genthon Caroline Tramier Quentin Delvienne Pascal Dumas Nathalie Rouché Kavya Wijesuriya Jean-Jerôme Cassan Angelline Goué |
| author_sort | Pierre Genthon |
| collection | DOAJ |
| description | Study region: The eastern coast of New Caledonia (SW Pacific). Study focus: The HydroThiem hydrological observatory is devoted to the study of the impact of invasive ungulate species and bushfires on water resources, erosion and water quality in a catchment used for drinking water. It includes (1) three 100 m2 plots located on characteristic land surfaces, i.e. a woody savanna submitted to bushfires every few years, a healthy forest and a forest strongly degraded by deer and wild pigs, (2) two watersheds covering areas of 25 200 m2 and 3.1 km2. The first watershed includes mostly savanna while the second one is mostly constituted of humid forest. Available data include rainfall, soil moisture, discharge, and suspended matter concentration. New hydrological insight: Discharge and erosion rates exhibit striking differences between the three plots: the healthy forest presents a 3 % runoff and almost no erosion, the degraded forest being characterized by a 90 % runoff and large erosion, the savanna presenting intermediate values of runoff and erosion. The largest watershed present a 64 % runoff and an erosion rate amounting to 72 % of the one of the degraded plot. This emphasizes the role of subsurface flow and of gully erosion, respectively. Results from the Hydrothiem observatory can be used for a comparison with similar watersheds and may suggest guidelines for restoration and conservation strategies. |
| first_indexed | 2024-04-12T00:46:19Z |
| format | Article |
| id | doaj.art-97aea03a855645c4bb37a88178aa727e |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-04-12T00:46:19Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-97aea03a855645c4bb37a88178aa727e2022-12-22T03:54:52ZengElsevierJournal of Hydrology: Regional Studies2214-58182022-12-0144101223Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific)Pierre Genthon0Caroline Tramier1Quentin Delvienne2Pascal Dumas3Nathalie Rouché4Kavya Wijesuriya5Jean-Jerôme Cassan6Angelline Goué7HydroSciences Montpellier, University of Montpellier, French Institute for Research for Development (IRD), Nouméa, New Caledonia; Corresponding author.HydroSciences Montpellier, University of Montpellier, French Institute for Research for Development (IRD), Nouméa, New Caledonia; Northern Province, Koné, New Caledonia; UMR 228 ESPACE-DEV, University of New Caledonia (UNC), French Institute for Research for Development (IRD), Nouméa, New CaledoniaFrench International Forest Office (ONFI), Saint Mandé, FranceUMR 228 ESPACE-DEV, University of New Caledonia (UNC), French Institute for Research for Development (IRD), Nouméa, New CaledoniaHydroSciences Montpellier, University of Montpellier, French National Research Institute for Sustainable Development (IRD), CNRS, Montpellier, FranceHydroSciences Montpellier, University of Montpellier, French Institute for Research for Development (IRD), Nouméa, New CaledoniaNorthern Province, Koné, New CaledoniaNorthern Province, Koné, New CaledoniaStudy region: The eastern coast of New Caledonia (SW Pacific). Study focus: The HydroThiem hydrological observatory is devoted to the study of the impact of invasive ungulate species and bushfires on water resources, erosion and water quality in a catchment used for drinking water. It includes (1) three 100 m2 plots located on characteristic land surfaces, i.e. a woody savanna submitted to bushfires every few years, a healthy forest and a forest strongly degraded by deer and wild pigs, (2) two watersheds covering areas of 25 200 m2 and 3.1 km2. The first watershed includes mostly savanna while the second one is mostly constituted of humid forest. Available data include rainfall, soil moisture, discharge, and suspended matter concentration. New hydrological insight: Discharge and erosion rates exhibit striking differences between the three plots: the healthy forest presents a 3 % runoff and almost no erosion, the degraded forest being characterized by a 90 % runoff and large erosion, the savanna presenting intermediate values of runoff and erosion. The largest watershed present a 64 % runoff and an erosion rate amounting to 72 % of the one of the degraded plot. This emphasizes the role of subsurface flow and of gully erosion, respectively. Results from the Hydrothiem observatory can be used for a comparison with similar watersheds and may suggest guidelines for restoration and conservation strategies.http://www.sciencedirect.com/science/article/pii/S2214581822002361Hydrologic regimeErosionDegraded land surfaceBushfireSavanna, tropical forestTropical climate |
| spellingShingle | Pierre Genthon Caroline Tramier Quentin Delvienne Pascal Dumas Nathalie Rouché Kavya Wijesuriya Jean-Jerôme Cassan Angelline Goué Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) Journal of Hydrology: Regional Studies Hydrologic regime Erosion Degraded land surface Bushfire Savanna, tropical forest Tropical climate |
| title | Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) |
| title_full | Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) |
| title_fullStr | Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) |
| title_full_unstemmed | Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) |
| title_short | Hydrosedimentary monitoring of the Hydrothiem observatory, Eastern tropical coast of New Caledonia (SW Pacific) |
| title_sort | hydrosedimentary monitoring of the hydrothiem observatory eastern tropical coast of new caledonia sw pacific |
| topic | Hydrologic regime Erosion Degraded land surface Bushfire Savanna, tropical forest Tropical climate |
| url | http://www.sciencedirect.com/science/article/pii/S2214581822002361 |
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