GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines
The study presents a GIS-based morphometric analysis characterizing the watersheds in Bohol, Philippines. An IfSAR-derived DEM data were processed and used to delineate the watersheds and evaluate morphometric parameters in QGIS/QSWAT. The analysis revealed that Loboc Watershed (LW) and Wahig-Inaban...
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Taylor & Francis Group
2024-10-01
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| Series: | Geology, Ecology, and Landscapes |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/24749508.2022.2158554 |
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| author | Imelida Torrefranca Roland Emerito Otadoy |
| author_facet | Imelida Torrefranca Roland Emerito Otadoy |
| author_sort | Imelida Torrefranca |
| collection | DOAJ |
| description | The study presents a GIS-based morphometric analysis characterizing the watersheds in Bohol, Philippines. An IfSAR-derived DEM data were processed and used to delineate the watersheds and evaluate morphometric parameters in QGIS/QSWAT. The analysis revealed that Loboc Watershed (LW) and Wahig-Inabanga Watershed (WIW) were sixth-order watersheds. Covering 675 km2 (LW) and 610 km2 (WIW), the watersheds encompassed about 34% of the mainland area. The bifurcation ratios, 3.91 (WIW) and 4.06 (LW), suggested highly dissected watersheds with high flood peaks. LW has low permeability, and high runoff and erosion susceptibility compared to WIW, as indicated by higher values for the form factor, circulatory ratio, drainage density, and stream frequency. The ruggedness numbers of 1.653 (WIW) and 1.457 (LW) indicated steep slopes in WIW than in LW, associated with high erosion and environmental degradation. The hypsometric integral of 0.22 (WIW) and 0.37 (LW) implied lesser erosional areas in WIW than in LW. The study found that both watersheds were highly susceptible to erosional processes. The two watersheds performed critical environmental functions on Bohol Island; hence, the results of this study present a piece of baseline information for resource managers to conduct further investigations that would identify hotspot areas and enable targeted soil and water conservation initiatives. |
| format | Article |
| id | doaj-art-bb697b0d11384075a94d7e6b94a830d7 |
| institution | Kabale University |
| issn | 2474-9508 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Geology, Ecology, and Landscapes |
| spelling | doaj-art-bb697b0d11384075a94d7e6b94a830d72024-11-21T11:27:44ZengTaylor & Francis GroupGeology, Ecology, and Landscapes2474-95082024-10-018452753810.1080/24749508.2022.2158554GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, PhilippinesImelida Torrefranca0Roland Emerito Otadoy1School of Engineering, University of San Carlos, Talamban, Cebu City 6000, PhilippinesTheoretical and Computational Sciences and Engineering Group, Department of Physics, University of San Carlos-Talamban Campus, Nasipit, Talamban, Cebu City 6000, PhilippinesThe study presents a GIS-based morphometric analysis characterizing the watersheds in Bohol, Philippines. An IfSAR-derived DEM data were processed and used to delineate the watersheds and evaluate morphometric parameters in QGIS/QSWAT. The analysis revealed that Loboc Watershed (LW) and Wahig-Inabanga Watershed (WIW) were sixth-order watersheds. Covering 675 km2 (LW) and 610 km2 (WIW), the watersheds encompassed about 34% of the mainland area. The bifurcation ratios, 3.91 (WIW) and 4.06 (LW), suggested highly dissected watersheds with high flood peaks. LW has low permeability, and high runoff and erosion susceptibility compared to WIW, as indicated by higher values for the form factor, circulatory ratio, drainage density, and stream frequency. The ruggedness numbers of 1.653 (WIW) and 1.457 (LW) indicated steep slopes in WIW than in LW, associated with high erosion and environmental degradation. The hypsometric integral of 0.22 (WIW) and 0.37 (LW) implied lesser erosional areas in WIW than in LW. The study found that both watersheds were highly susceptible to erosional processes. The two watersheds performed critical environmental functions on Bohol Island; hence, the results of this study present a piece of baseline information for resource managers to conduct further investigations that would identify hotspot areas and enable targeted soil and water conservation initiatives.https://www.tandfonline.com/doi/10.1080/24749508.2022.2158554Landform dynamicserosion susceptibilityrunoff characteristicswatershed management |
| spellingShingle | Imelida Torrefranca Roland Emerito Otadoy GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines Geology, Ecology, and Landscapes Landform dynamics erosion susceptibility runoff characteristics watershed management |
| title | GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines |
| title_full | GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines |
| title_fullStr | GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines |
| title_full_unstemmed | GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines |
| title_short | GIS-based watershed characterization and morphometric analysis in Bohol Watersheds, Philippines |
| title_sort | gis based watershed characterization and morphometric analysis in bohol watersheds philippines |
| topic | Landform dynamics erosion susceptibility runoff characteristics watershed management |
| url | https://www.tandfonline.com/doi/10.1080/24749508.2022.2158554 |
| work_keys_str_mv | AT imelidatorrefranca gisbasedwatershedcharacterizationandmorphometricanalysisinboholwatershedsphilippines AT rolandemeritootadoy gisbasedwatershedcharacterizationandmorphometricanalysisinboholwatershedsphilippines |