ABSTRAK
Urbanisasi telah mengubah tutupan lahan dari permukaan lolos air menjadi permukaankedap air yang dapat berdampak pada peningkatan limpasan hujan di kawasanperkotaan. Penelitian ini bertujuan untuk menilai efektifitas sebaran spasial GreenInfrastructure (GI) dalam pengurangan limpasan hujan di berbagai spektrum hujan.Simulasi pengurangan limpasan hujan melalui penerapan GI diimplementasikan padaDTA yang berlokasi di Pondok Kelapa, Duren Sawit, Jakarta Timur. EPA SWMMdigunakan untuk mensimulasi model hidrologi melalui tiga skenario : skenario-1baseline (kondisi eksisting tanpa penerapan GI), skenario-2 GI (penerapan GI melaluirain garden, rain barrel dan porous pavement), skenario-3 RDTR (sesuai RencanaDetail Tata Ruang DKI Jakarta). Hasil simulasi SWMM menunjukkan skenario-2 GIuntuk hujan kala ulang 2-, 5-, 10-, 25-, 50-tahun menghasilkan persentase pengurangantotal volume limpasan secara berurutan sebesar 9.76%, 8.76%, 8.27%, 7.50%, 7.05%dan persentase pengurangan debit puncak sebesar 9.29%, 7.97%, 5.83%, 3.49%, 2.21%dibandingkan tanpa penerapan GI. Adapun untuk skenario-3 RDTR untuk kala ulanghujan yang sama menghasilkan persentase penambahan total volume limpasan secaraberurutan sebesar 7.43%, 6.15%, 5.36%, 4.67%, 4.20% dan persentase penambahandebit puncak sebesar 3.93%, 2.33%, 1.29%, 0.63%, 0.63% dibandingkan dengankondisi eksisting tanpa penerapan GI.
ABSTRACT
Urbanization has changed the land use from pervious cover to impervious cover whichhave an impact on increasing runoff in urban areas. The objective of this study is todetermine the effectiveness of spatial distribution of Green Infrastructure (GI) inreducing runoff under various design storms. Simulation of runoff reduction is carriedout by implementing the GI in the catchment area located in Pondok Kelapa, EasternJakarta, Indonesia. EPA SWMM 5.1 was used to simulate the performance of GI onreducing runoff in the study site for three simulation scenarios: baseline scenario(current conditions), GI scenario (implementing rain garden and rain barrel) andRencana Detail Tata Ruang (RDTR) scenario. The results show that GI scenariocompared to the baseline scenario under various design storms 2-year, 5-year, 10-year,25-year and 50-year return periods reduce the total runoff volume approximately 9.76%,8.76%, 8.27%, 7.50%, 7.05, respectively and reduce the peak flows approximately9.29%, 7.97%, 5.83%, 3.49%, 2.21%. For RDTR scenario compared to BL scenarioresulting in percentile of total runoff volumes increase were 7.43%, 6.15%, 5.36%,4.67%, 4.20% and the percentile of peak flows increase were 3.93%, 2.33%, 1.29%,0.63%, 0.63% for the same return periods.
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T52731-Ahmad Sobirin.pdf :: Unduh