18/05/2026
๐ ๐ฎ๐ฝ ๐๐ฒ๐ฎ๐๐๐ฟ๐ฒ #๐ฑ: ๐๐ป๐๐ถ๐๐ถ๐ผ๐ป๐ถ๐ป๐ด ๐ฎ ๐ฆ๐๐๐๐ฎ๐ถ๐ป๐ฎ๐ฏ๐น๐ฒ ๐ช๐ฎ๐๐ฒ๐ฟ ๐ฅ๐ฒ๐๐ผ๐๐ฟ๐ฐ๐ฒ ๐๐ผ๐๐ฒ๐ฟ๐ป๐ฎ๐ป๐ฐ๐ฒ ๐ถ๐ป ๐๐ต๐ฒ ๐ฆ๐ฎ๐บ๐ฏ๐๐ป๐ผ๐๐ฎ๐ป ๐ช๐ฎ๐๐ฒ๐ฟ๐๐ต๐ฒ๐ฑ: ๐๐ป๐๐ฒ๐ด๐ฟ๐ฎ๐๐ถ๐ป๐ด ๐๐๐ฆ, ๐๐๐ฑ๐ฟ๐ผ๐น๐ผ๐ด๐, ๐๐ฒ๐ผ๐น๐ผ๐ด๐, ๐ฎ๐ป๐ฑ ๐ช๐ฎ๐๐ฒ๐ฟ ๐ค๐๐ฎ๐น๐ถ๐๐ ๐๐ป๐๐ถ๐ด๐ต๐๐
This map feature highlights key findings from an interdisciplinary assessment of the Sambunotan Watershed in the Dinagat Islands, aimed at strengthening sustainable water resource governance through integrated spatial and environmental analysis.
The Sambunotan Watershed serves as a critical source of domestic water supply for multiple barangays, while also supporting agriculture and local biodiversity. Increasing pressures from deforestation, mining activities, and land-use change heighten the need for a detailed understanding of watershed behavior, water availability, and environmental vulnerability.
Using GIS and a 5-meter spatial resolution Digital Terrain Model (DTM), the researchers refined the watershed boundary and confirmed that the Sambunotan River is not the primary tributary within the basin. Hydrological modeling estimated an annual baseflow of 71.6 million cubic meters, with the majority generated during the wet season, emphasizing the importance of seasonal water management. Geological mapping identified lithologic units and areas susceptible to degradation, while water quality analysis revealed a strong relationship between forest cover and healthier water parameters. Zones composed of clastic sediments and limestone were identified as potential aquifers due to favorable porosity characteristics.
By integrating spatial, hydrological, geological, and water quality datasets, the study provides a holistic view of water movement, storage, and quality within the Sambunotan Watershed. The findings support watershed conservation, guide groundwater exploration, and contribute directly to long-term sustainable water supply planning in the Dinagat Islands.
Reference:
Makinano-Santillan, M., Gagula, A., Varela, R., & Santillan, J. (2024). Envisioning a Sustainable Water Resource Governance in the Sambunotan Watershed: Integrating GIS, Hydrology, Geology, and Water Quality Insights. Journal of Ecosystem Science and Eco-Governance, 6(2), 34โ46. https://doi.org/10.54610/jeseg.v6i2.119
Featured by: Sophia Therese Flores
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