Strategies for Rainwater and Waste Management

Strategies for Rainwater and Waste Management

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  THE 15 thAnnual International Conference (AIC) 2025 InnOVATING TOGETHER FOR A SUSTAINABLE FUTURE: GREEN TECHNOLOGIES AND CIRCULAR ECONOMY IN ACTION UNIVERSITAS SYIAH KUALA Strategies for Rainwater and Waste Management as Flood Mitigation Efforts in Residential Areas of Medan City NOV RIAL HAFIZHU L KHAIR AM ELIM ASNI PU TRI W U LANDARI Department of Architecture Faculty of Engineering Universitas Sumatera Utara
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  OUTLINE Introduction Literature Review Methods Result &Discussion Conclusion
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  INTRODUCTION Flooding is oneof the most pressing urban environmental problems in Indonesia, particularly in Medan City. Main contributing factors: • High rainfall intensity • Low drainage capacity • Poor land use planning • Insufficient waste management Impacts: • Threatens public health • Disrupts socio-economic activities • Reduces urban environmental quality This Study: • Proposes an integrated approach: • Rainfall infiltration (infiltration wells) • Waste management (domestic trash separation) • Supported by community participation & local institutions. • Contributes to flood risk reduction & aligns with SDG 11 (Sustainable Cities) and SDG 13 (Climate Action).
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  LITERATURE REVIEW Rainwater Managementand Flood Mitigation • Urban flooding in tropical cities caused by limited drainage & reduced soil infiltration. → • Infiltration wells: ⚬ Low-cost, effective to recharge groundwater. ⚬ Reduce flooding by 30–50% in Medan (Mulia et al., 2024). • Biopore infiltration pits: complementary in dense areas (Nisdayanti et al., 2025). • Importance of structural + non-structural measures: ⚬ Infrastructure + community involvement (Sharma et al., 2016; Liu & Yang, 2012). Solid Waste Management and Urban Drainage • Poor waste management major cause of clogged drainage in SE Asian cities. → • Medan case: ⚬ Household waste (plastic + organic) blocks secondary drainage channels. • Community-based programs: ⚬ Waste separation & recycling improve environmental health. ⚬ Separate bins for organic, inorganic, hazardous waste increase participation → (Marlina et al., 2023; Fiqih & Syaiful, 2023).
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  LITERATURE REVIEW Integrated Approaches •Water Sensitive Urban Design (WSUD): links hydrology, ecology, and community behavior (Fletcher et al., 2013). • Infiltration wells as environmental education tools, not just hydrological infrastructure. • Informal sector involvement in recycling critical for underfunded urban → systems (Zurbrugg, 2003). • Community groups essential for sustainability of interventions. Knowledge Gaps & Contribution • Previous studies: focus on rainwater infiltration or waste management separately. • Limited research on combined approaches in Indonesian cities. • This study’s contribution: ⚬ Integrated strategy = infiltration wells + waste separation. ⚬ Framework: community-based disaster risk reduction & sustainability.
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  METHODS Approach: ⚬ Community-Based ParticipatoryApproach (CBPR) 📍 Implementation ➡️Infiltration wells (~12 m depth, PVC system) ➡️ Installation of separate waste bins (organic, inorganic, hazardous) ⬇️ 📍 Monitoring & Evaluation (6 months) ➡️Surveys & observations ➡️Community feedback ➡️ Indicators: waterlogging reduction, waste separation adoption, community participation 📍 Initial Assessment ➡️Field observation ➡️Mapping flood-prone areas ➡️Community discussions ⬇️ 📍 Awareness & Training ➡️Awareness program (rainwater infiltration, waste separation) ➡️ Workshops: infiltration wells & household waste management
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  RESULT & DISCUSSION RainwaterManagement • Infiltration wells (~12 m, double PVC system): • Act as vertical drainage reduce → surface runoff & recharge groundwater. • Flooding reduced by ~50% after 6 months monitoring. • Community involvement: • Residents engaged in excavation, assembly, and maintenance. • Strengthened ownership & accountability sustainable → outcome.
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  RESULT & DISCUSSION SolidWaste Management • Problem: Household waste clogging drains (organic + plastic). Intervention: • Installed segregated bins (organic, inorganic, hazardous). • Education via workshops, posters, training. Impact: • +30% families practiced proper waste separation. • +70% increase in residents’ knowledge of waste disposal.
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  RESULT & DISCUSSION Social& Economic Impacts Social: • Reduced flooding smoother mobility, schooling, small → businesses. • Better psychological well-being (less anxiety from floods). Health: • Cleaner surroundings potential reduction in diarrhea & dengue. → • Lower household medical costs. Economic: • Composting & recycling income opportunities. → • Resource use for home gardens & informal waste collectors. Community Cohesion: • Local organizations support decision-making & accountability. • Technical + social integration ensures sustainability.
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  CONCLUSION 💧 Integrated Approach •Infiltration wells reduced surface runoff & replenished → groundwater • Waste separation reduced drainage clogging & waterlogging → ♻️Impacts • Flood reduction: lower frequency & severity of flooding • Health benefits: cleaner environment, reduced waterborne diseases, lower medical costs • Economic opportunities: composting & recycling as income sources ❤️Community-based model • Strengthens ownership, participation, and accountability • Links hydrological solutions with behavioral & institutional change 👥 Scalability • Practical, adaptable, and replicable for other urban areas facing similar challenges • Contributes to sustainability, resilience, and improved urban quality of life
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