Remote Sensing Application of the Geophysical Changes in the Coastlines and Rivers of Zambales, Philippines

Paz-Alberto, Annie Melinda; Sison, Melissa Joy M.; Bulaong, Edmark P.; Pakaigue, Marietta A.

doi:10.5194/isprs-archives-xli-b8-379-2016

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Taking examples from across the Philippines, remote sensing analyses have indicated the dynamic planform morphologies of selected rivers. Reach-scale aerial imagery analysis in the Bucao and Santo Tomas Rivers (Zambales) showed spatially variable changes in river width between 2004 and 2013; a legacy effect of sediment supply from the Mt Pinatubo volcanic eruption in 1991 (Paz-Alberto et al 2016). A national-scale assessment of river migration in the vicinity of 74 large river bridges using Landsat satellite imagery showed that some river reaches have remained approximately stable over the 30-year monitoring period whilst others have considerably adjusted through migration, contraction and expansion (Boothroyd et al 2021b).…”

Section: Introductionmentioning

confidence: 99%

River Styles and stream power analysis reveal the diversity of fluvial morphology in a Philippine tropical catchment

et al. 2022

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Characterisation of hydromorphological attributes is crucial for effective river management. Such information is often overlooked in tropical regions such as the Philippines where river management strategies mainly focus on issues around water quality and quantity. We address this knowledge gap using the River Styles Framework as a template to identify the diversity of river morphodynamics. We identify eight distinct River Styles (river types) in the Bislak catchment (586 km2) in the Philippines, showing considerable geomorphic diversity within a relatively small catchment area. Three River Styles in a Confined valley setting occupy 57% of the catchment area, another three in a partly confined valley setting occupy 37%, and two in the remaining 6% are found in a laterally unconfined valley setting. Five characteristic downstream patterns of River Styles were identified across the catchment. We observe that variation in channel slope for a given catchment area (i.e., total stream power) is insufficient to differentiate between river types. Hence, topographic analyses should be complemented with broader framed, catchment-specific approaches to river characterisation. The outputs and understandings from the geomorphic analysis of rivers undertaken in this study can support river management applications by explicitly incorporating understandings of river diversity and dynamics. This has the potential to reshape how river management is undertaken, to shift from reactive, engineering-based approaches that dominate in the Philippines, to more sustainable, ecosystem-based approaches to management.

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Section: Introductionmentioning

confidence: 99%

River Styles and stream power analysis reveal the diversity of fluvial morphology in a Philippine tropical catchment

et al. 2022

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“…Torrential and intense rainfall, severe storm occurrences and strong typhoons have occurred and being experienced which caused massive landslides and excessive flooding in various parts of the country [3] [4] [5] [6]. It was also during the past 15 years that the Philippines was hit by the strongest typhoon ever recorded, the most destructive, the deadliest, and that registered the highest recorded 24-hour rainfall [3].…”

Section: Introductionmentioning

confidence: 99%

Climate Change Impacts and Vulnerability Assessment of Selected Municipalities and Agroecosystems to Support Development of Resilient Communities and Livelihoods in Nueva Ecija, Philippines

Paz-Alberto¹,

Dios²,

Alberto³

et al. 2018

AJCC

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In the last decade, the Philippines had been hit severely by natural disasters brought about by climate change which caused great damages to agriculture. The objectives of the study were to assess climate change impacts and vulnerability of Bongabon, Gabaldon and Cabanatuan City, Nueva Ecija; to assess the vulnerability and suitability of growing various crops, goats and chicken; to generate vulnerability and suitability maps; and to validate the maps produced. A comprehensive scoping, profiling, vulnerability assessment and crop, chicken and goat suitability assessment of the municipalities and agroecosystems of the study sites was done. Generation and validation of the vulnerability and suitability maps were also conducted. Results revealed that Bongabon obtained moderate vulnerability to floods and typhoon while low vulnerability to drought and soil erosion. Gabaldon had moderate vulnerability to floods, soil erosion and drought while low vulnerability to typhoon. Cabanatuan City attained moderate vulnerability to floods and drought while low vulnerability to typhoon. There were four crops suitable to grow in the current condition with flood and landslide hazards and in the two projected future scenarios (RCP 4.5 with good conditions and RCP 8.5 with the worst conditions). Only three crops are highly suitable to grow in Gabaldon for the future conditions while in Cabanatuan City four crops are very suitable for the three situations. Native chicken and goats are highly suitable to raise in the three study sites for the three conditions. There were 16 vulnerability maps developed and generated in Bongabon, 16 in Gabaldon and only 12 in Cabanatuan City. Furthermore, 21 crop, chicken and goat suitability maps were produced in Bongabon, 27 maps in Gabaldon and 21 maps in Cabanatuan City. Overall, validation of the maps in the study sites had high accuracy.

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Remote Sensing Application of the Geophysical Changes in the Coastlines and Rivers of Zambales, Philippines

Cited by 2 publications

References 6 publications

River Styles and stream power analysis reveal the diversity of fluvial morphology in a Philippine tropical catchment

River Styles and stream power analysis reveal the diversity of fluvial morphology in a Philippine tropical catchment

Climate Change Impacts and Vulnerability Assessment of Selected Municipalities and Agroecosystems to Support Development of Resilient Communities and Livelihoods in Nueva Ecija, Philippines

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