
Breadcrumb
ASEANO Project Report: Mapping of Sources and Concentration of Plastic Waste in the Imus River Watershed
PUBLICATION DATE:
Tuesday, April 19, 2022
PUBLICATION TYPE:
Reports
STATUS:
Only Available Online
DESCRIPTION:
The sources of plastic wastes and areas of expected high levels of plastic waste generation were mapped in the Imus River Watershed in the Province of Cavite, in the Philippines. Different sources of plastic waste were identified, and used to estimate the magnitude of plastic waste generation. Information on the major sources of plastic waste were obtained from the 10-Year Solid Waste Management Plan of the seven cities and municipalities located within the boundaries of the watershed. Remote sensing technology was used to identify the coordinates of different potential sources. For higher resolution, Google Imagery was used in preparing base maps which were imported and georeferenced in ArcMap. A 7-day waste characterization study in three selected barangays was conducted to determine the average amount of plastic waste generated per household. This data served as inputs for a hotspot analysis in ArcGIS to identify plastic waste generation hotspots within the watershed. The Imus River system traverses seven cities and municipalities that include parts of Tagaytay City, Silang, and Amadeo in the upland areas, a large part of the densely populated and urbanized cities of Dasmariñas and Imus City in the central hilly areas, and portions of the lowland City of Bacoor and the coastal Municipality of Kawit. It has a total drainage area of 11,259.80 hectares. A total of 222 barangay communities were identified within the boundaries of the watershed with a total population of 1,351,057. The major sources of waste in the watershed were primarily households, followed by commercial, institutional, and industrial establishments. The total number of commercial, institutional, and industrial establishments identified was 778, and a total of 54 waste storage facilities were found in the watershed. From the 7-day characterization study in three selected barangay communities, an average of 113.03 kg of plastics was generated daily by the households in Barangay Burol 1, Dasmariñas City; 9.17 kg/day in Barangay Mabolo 1, Bacoor City; and 29.29 kg/day in Barangay Maitim 2nd Central, Tagaytay City. An average of 0.17 Kg/day per household of plastics were generated in the watershed and 0.05 Kg/day per capita. A cluster of high plastic waste generating barangays was identified in Dasmariñas City, where various tributaries of the Imus River converge. This combination is likely to create a significant hotspot for waste leakage. Clusters of low plastic waste generating barangays were identified in parts of Imus, Kawit, and Bacoor. These cold spots should not be ignored, as increasing plastic waste generation could exceed capacity and push them into future leakage hotspots.
RELATED PUBLICATIONS
Proceedings of the Thirty Third East Asian Seas Executive Committee Meeting
The East Asian Seas (EAS) Executive Committee convened its 33rd Meeting on 28 April 2025 in Busan, Republic of Korea. The meeting gathered key leaders of the EAS Partnership Council, including Chair Dr. Vann Monyneath, Co-Chair Atty. Jonas Leones, Intergovernmental Session Co-Chair Mr. Le Dai Thang, Technical Session Chair Dr. Keita Furukawa, and Technical Session Co-Chair Dr. Suk-Jae Kwon. The PEMSEA Resource Facility (PRF) Secretariat, led by Executive Director Ms. Aimee T. Gonzales, provided secretariat support, alongside other PRF staff. Observers included representatives from the Arafura Timor Seas program, Korea Maritime Institute, China’s Ministry of Natural Resources, and the China PEMSEA Center, with additional PRF personnel joining online.
The meeting agenda featured key updates and strategic discussions on the outcomes and next steps following the East Asian Seas Congress 2024, the alignment of the Sustainable Development Strategy for the Seas of East Asia (SDS-SEA) with 2030 targets, and PRF’s accomplishments in 2024 and work plan for 2025. Other agenda items included preparations for the 17th EAS Partnership Council Meeting, the engagement of Non-Country Partners, progress on the Blue Carbon Program, presentation of the 2024 audited financial report, and governance matters such as the election of new officers and the selection process for the next PRF Executive Director.
PEMSEA Annual Report 2024: A Year of Collaboration: Driving Blue Synergies Towards Resilient Coasts and Ocean in the East Asian Seas Region
2024 was a landmark year for PEMSEA with the successful organization of the EAS Congress 2024 and the 8th Ministerial Forum as key highlights. These milestone events led to stronger and renewed commitments to drive synergistic actions towards sustainable, inclusive and resilient coasts, ocean and communities, aligned with national priorities and global and regional targets.
Check out progress and plans of PEMSEA's projects that address complex interconnected environmental challenges in the region: marine plastic pollution, biodiversity loss and climate change through rigorous baseline data collation, analysis and reporting; enhancing governance and investment plans and programs; knowledge management and technical skills and capacity development.
PEMSEA eBulletin - April 2025
Dear PEMSEA community,
April is packed with exciting progress and developments across the region!
PEMSEA is making waves at the 10th Our Ocean Conference in Busan by organizing a side event that brought together regional partners committed to support governments in meeting their 30x30 conservation targets while enhancing protection of our valuable marine ecosystems.
Looking toward the future, PEMSEA's Executive Committee (EC) Meeting in Busan endorsed plans to extend our Sustainable Development Strategy implementation to 2030. The EC also noted progress on our regional Blue Carbon Program and finalized the timeline for upcoming Partnership Council elections.
We're also proud to announce the release of "Threads of Resilience," the sixth edition of our Integrated River Basin Management Project newsletter. This issue tells inspiring narratives of women from the Sasmuan Pampanga Coastal Wetlands alongside the impactful work of female environmental leaders driving change across Southeast Asia and critical conservation needs for key project sites, including Indonesia's Ciliwung River.
Other important developments include the PNLG Executive Committee's announcement of upcoming elections and General Assembly in Jakarta, the successful launch of the GEF/UNDP/ASEAN Integrated River Basin Management Project in Viet Nam, and regional training initiatives to enhance blue carbon knowledge and integrated coastal management strategies in Xiamen, China.
Integrated River Basin Management Project Newsletter - Edition 6
"Threads of Resilience” marks the sixth edition of the Integrated River Basin Management (IRBM) Project's newsletter, spotlighting inspiring narratives of women and advancements in project implementation.
This issue features threads of resilience in the stories of women from the Sasmuan Pampanga Coastal Wetlands of the Pasac-Guagua Watershed in the Philippines, alongside the impactful work of women leaders driving environmental change across Southeast Asia. It also highlights the need to conserve key project sites, including the Ciliwung River in Indonesia.
Key project activities and milestones from the first quarter of 2025 include the ongoing formulation of a framework and solutions template for pilot project development in the seven priority river basins, Lao PDR's approval of the 2025 Work Plan and State of the River Basin Report for the Nam Tha River Basin, and stakeholder validation workshops for the State of River Basin Reports for the Imus-Ylang Ylang and Rio Grande Rivers, as well as the Pasac-Guagua Watershed.
These interconnected efforts are key components of a strengthening web of partnerships and collaboration within the ASEAN region.
Proceedings of the 2025 MEP Program Planning Workshop
The planning workshop for the 2025 Marine Environment Protector (MEP) Program was conducted on 18-19 March 2025 at Parañaque, Philippines and brought together representatives from MEP partner organizations across six Philippine sites.
Representatives from the four existing MEP program sites presented their 2024 accomplishments and shared lessons learned from implementation. The workshop also served as an introduction for new MEP partners from Bulan and Calbayog who will begin implementation in 2025.
The participants discussed various campaigns and identified effective practices that could be applied across different sites. Together, they drafted comprehensive work plans and timelines aligned with the 2025 implementation guidelines established by the Regional Project Management Unit (RPMU).
The two-day workshop successfully established target outputs for 2025 implementation and developed strategies to effectively impact local communities in their respective sites. Participants focused on ensuring engagement and full support of their respective local government units for proposed marine plastic waste management initiatives.