000			02688nam a22003377a 4500
003			OSt
005			20250115160445.0
008			250115b |||||||| |||| 00| 0 eng d
022			_a0119-7312
040			_cDSSC
082			_aPer/631.4/Ar471/2024
100			_aArizobal, Dhoz E. _912182
130			_aPhilippine Journal of Agricultural and Biosystems Engineering _912184
245			_aAssessment of soil erosion risk at Carrascal, Surigao del Sur, Philippines using soil and water assessment tool (SWAT+) _cby Dhoz E. Arizobal, Roger A. Luyun, Jr., Antonio G.P. Sobremisana and Jeffrey A. Gonzales
300			_app. 3-14 _c23cm.
336			_atext
337			_aunmediated
338			_avolume
440			_v20(1), 3-14 _x0119-7312
500			_aErosion causes the disruption of soil health brought about by the removal of rich topsoil. Erosion risk in Carrascal, Surigao del Sur, Philippines was assessed using the process-based modeling SWAT+. The hydrologic model of the watershed was created and characterized in SWAT based on DEM, land use, and soil thematic maps. Individual combinations of hydrologic response unit (HRUs) and landscape units (LSUs) of the watershed per dataset were generated and together with climate data, average annual sediment yields for different channels and subbasins were then estimated. Sediment yield was observed to have increased in specific areas within the catchment in the year 2003, 2010, 2015, and 2017 simulations. Relatively high sediment yield was observed in the northwestern and south sections of the catchment corresponding to the steep slopes of the Surigao mountains, while no significant sedimentation occurred in the coastal and eastern sections. Two land use change scenarios, a conversion of 15% forested area to agricultural area and a 10% increase in forest area, were introduced in the simulation to assess the variation of sediment yields in each subbasin. Results show only moderate variation in sedimentation between low yield and relatively high-yield channels subjected to the same land use changes indicating that erosion in the area is influenced not solely by land use but combination of both land use and slope. Sediment yield simulation and scenario analysis can serve as an additional tool for the formulation of conservation policies in the locality.
650		0	_aSoil erosion _94197
650		0	_aSWAT+ _912189
650		0	_aLand use _94204
650		0	_aSediment yield _912190
650		0	_aCarrascal _912191
650		0	_aSurigao _912192
700			_aLuyun, Roger A., Jr. _912194
700			_aSobremisana, Antonio G.P. _912196
700			_aGonzales, Jeffrey A. _912197
942			_2ddc _cPINDEX
999			_c8688 _d8688