Practices, Behaviors, and Action on Climate Change and Environmental Protection and Conservation of Settlers along the Banks of Oro River, Northern Mindanao, Philippines

Japos, Genaro V.; Lubos, Lesley C.

doi:10.7828/ajob.v5i1.485

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Based on the study undertaken by Meijer et al [ 70 ], the Cagayan de Oro River ranked 32 nd (3.6 × 10 3 metric tons/year) of the top 50 plastic-emitting rivers into the ocean globally. Exposed plastics may degrade into microplastics, and the fact that people who lived close to rivers rely on river life forms, including fish, snails, and plants, for sustenance and household consumption [ 71 ] makes it more alarming, highlighting the dire need for this study. However, the extent of microplastic pollution in this ecologically important river has not been systematically studied yet.…”

Section: Introductionmentioning

confidence: 99%

Riverine Microplastic Pollution: Insights from Cagayan de Oro River, Philippines

Gabriel

Amparado

Lubguban

et al. 2023

IJERPH

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Rivers are vital water sources for humans and homes for aquatic organisms. Conversely, they are well known as the route of plastics into the ocean. Despite being the world’s number one emitter of riverine plastics into the ocean, microplastics (MPs), or plastic particles less than 5 mm, in the Philippines’ rivers are relatively unexplored. Water samples were collected from six sampling stations along the river channel of the Cagayan de Oro River, one of the largest rivers in Northern Mindanao, Philippines. The extracted microplastics’ abundance, distribution, and characteristics were analyzed using a stereomicroscope and Fourier transform infrared spectroscopy (FTIR). The results showed a mean concentration of 300 items/m3 of MPs dominated by blue-colored (59%), fiber (63%), 0.3–0.5 mm (44%), and polyacetylene (48%) particles. The highest concentration of microplastics was recorded near the mouth of the river, and the lowest was in the middle area. The findings indicated a significant difference in MP concentration at the sampling stations. This study is the first assessment of microplastic in a river in Mindanao. The results of this study will aid in formulating mitigation strategies for reducing riverine plastic emissions.

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Section: Introductionmentioning

confidence: 99%

Riverine Microplastic Pollution: Insights from Cagayan de Oro River, Philippines

Gabriel

Amparado

Lubguban

et al. 2023

IJERPH

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“…The human interactions with climate change, the ecosystem, and its services are another crucial area of future study (Cruz et al, 2017). Working with stakeholders to promote sustainable land use management and education around the potential effects of climate change can increase their resilience and disaster preparedness (Eugenio et al, 2016;Japos & Lubos, 2014). The work already contributed by this thesis around ecosystem services can be further enhanced to include the effect of climate perturbations on ES and the hydrological cycle under different land cover scenarios, increasing the utility of the LUCI framework for decision-making.…”

Section: Ecosystem Services and Extreme Eventsmentioning

confidence: 99%

Understanding the effect of changing land use on floods and soil erosion in the Cagayan de Oro catchment

Benavidez¹

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<p>The destructive capability of typhoons affects lives and infrastructure around the world. Spatial analysis of historical typhoon records reveal an area of intense storm activity within the Southeast Asian (SEA) region. Within SEA is the Philippines, an archipelagic tropical country regularly struck by storms that often cause severe landslides, erosion and floods. Annually, ˜20 cyclones enter the Philippine Area of Responsibility, with about nine making landfall, causing high winds and intense rainfall. Thus, significant research in the Philippines has focused on increasing the resilience of ecosystems and communities through real-time disaster forecasting, structural protections, and programmes for sustainable watershed management (e.g. rehabilitation and conservation agriculture). This dissertation focused on the third aspect through computer modelling and scenario analysis. The study area is the Cagayan de Oro (CDO) catchment (˜1400km²) located in the Southern Philippines. The catchment experienced heavy flooding in 2012 from Typhoon Bopha and has major erosion problems due to mountainous slopes and heavy rainfall. Communities derive ecosystem services (ES) including agricultural production, water supply, recreation, mining resources, flood mitigation, etc. Since changes to the supply or distribution of these ES affects livelihoods and the hydrological response of the catchment to typhoon events, this research used the Land Utilisation and Capability Indicator (LUCI) model to understand the baseline ES and potential changes associated with basin management plans. This was the first detailed tropical application of LUCI, including parameterising it for Philippine soil and land cover datasets in CDO and extending its capability to be applied in future tropical areas. Aside from applying LUCI in a new geoclimatic region, this research contributed to the general development of LUCI through testing and improving its sediment delivery and inundation modelling. The sediment delivery was enhanced using the Revised Universal Soil Loss Equation (RUSLE) model that allows LUCI for the first time to account for impacts of specific land management such as agroforestry and contour cropping on erosion and sediment delivery. Progress was made in updating a flatwater inundation model for use with LUCI, including converting it to Python but this requires further development and testing before it is suitable for application in the Philippines. The development and rehabilitation scenarios showed improved flood mitigation, lower surficial soil erosion rates, and lower loads of nutrients compared to the baseline scenario. Additionally, ES mapping under different land cover scenarios has not been previously accomplished in CDO, and this research provides useful information to guide local decision-making and management planning. The rainfall-runoff model of LUCI was tested against the Hydrologic Engineering Center’s Hydrological Modelling System (HEC-HMS), showing good agreement with observed flow. Since the rainfall-runoff model of LUCI has been minimally utilised in past applications, this CDO application elucidated directions for future work around further testing under extreme rainfall events and climate change. Overall, this novel application of LUCI creates a framework to assist decision-making around land cover changes in the CDO, provides guidance around data requirements and parameterisation procedures to guide future international applications, and has significantly contributed to development and improvement of the LUCI framework to extend its modelling capabilities in the future.</p>

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Microplastic Abundance and Distribution in the Sediment of Cagayan de Oro River, Philippines

Gabriel,

Bacosa

2024

Soil and Sediment Contamination: An International Journal

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Practices, Behaviors, and Action on Climate Change and Environmental Protection and Conservation of Settlers along the Banks of Oro River, Northern Mindanao, Philippines

Cited by 4 publications

References 1 publication

Riverine Microplastic Pollution: Insights from Cagayan de Oro River, Philippines

Riverine Microplastic Pollution: Insights from Cagayan de Oro River, Philippines

Understanding the effect of changing land use on floods and soil erosion in the Cagayan de Oro catchment

Microplastic Abundance and Distribution in the Sediment of Cagayan de Oro River, Philippines

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