Perencanaan Bangunan Resapan Air Hujan Menggunakan Konsep Zero Run-off di Komplek Dramaga Cantik Blok A-E

Abstract

Curah hujan tinggi di Bogor meningkatkan limpasan dan risiko genangan, terutama di permukiman dengan lahan resapan terbatas. Penelitian ini merancang sistem resapan berbasis konsep zero run-off di Komplek Dramaga Cantik Blok A–E untuk mengurangi limpasan dan meningkatkan infiltrasi. Metode mencakup analisis curah hujan maksimum 20 tahun (2005–2024), identifikasi tutupan lahan, pengukuran infiltrasi tanah, dan perhitungan volume limpasan serta kapasitas sumur resapan berdasarkan SNI 03-2453-2002. Analisis Log-Pearson III yang lolos uji statistik menghasilkan curah hujan rencana 128 mm dan limpasan 1147,89 m³. Permeabilitas tanah 6,6 cm/jam (agak cepat) mendukung pembangunan 139 sumur resapan dengan efektivitas 56,47% dalam mengurangi limpasan. Sumur resapan terbukti mengurangi beban drainase dan mendukung konservasi air tanah, menegaskan efektivitas konsep zero run-off di pemukiman padat.

High rainfall in Bogor increases surface runoff and the risk of waterlogging, especially in residential areas with limited infiltration. This study designed an infiltration system using the zero run-off concept in the Dramaga Cantik Residence Block A–E to reduce runoff and improve infiltration. Methods included analysis of 20 years of maximum rainfall (2005–2024), land cover identification, soil infiltration testing, and runoff volume and infiltration well capacity calculations based on SNI 03-2453-2002. Rainfall was analyzed using the Log-Pearson III distribution, which passed Chi-Square and Smirnov-Kolmogorov tests, yielding a design rainfall of 128 mm and runoff volume of 1,147.89 m³. With a soil permeability of 6.6 cm/hour (moderately fast), 139 infiltration wells were planned, reducing runoff by 56.47%. These wells effectively lessen drainage loads and support groundwater conservation, proving the zero run-off concept effective for managing stormwater in dense residential areas.