Low Impact Development-Based Drainage Design in Residential Areas: A Case Study of Mastrip Housing
Abstract
Abstrak
Drainase konvensional menghadapi tantangan yang diperparah oleh peningkatan limpasan permukaan. Rain barrel adalah salah satu teknik Low Impact Development (LID) yang menyediakan penampung sementara yang berpotensi mengurangi limpasan. Oleh karena itu, penelitian ini menyelidiki penerapan rain barrel untuk meningkatkan ketahanan terhadap banjir di Mastrip Housing. Menggunakan Storm Water Management Model (SWMM), limpasan hujan dimodelkan dalam kondisi sebelum dan sesudah implementasi di 71 subcatchment untuk menilai dampak infrastruktur LID. Hasilnya mengungkapkan bahwa rain barrel dapat mengurangi puncak limpasan sebesar 11% hingga 51%, dengan rata-rata pengurangan sebesar 12%. Efektivitasnya bervariasi, dipengaruhi oleh kepadatan rain barrel, cakupan area, dan penggunaan lahan. Ada tren yan menunjukkan subcatchment dengan area kecil dan unit rain barrel lebih banyak menunjukkan pengurangan peak runoff yang lebih besar, menekankan pentingnya pertimbangan rasio. Meskipun demikian, penelitian ini menemukan bahwa penggunaan rain barrel tidak selalu berhasil dalam semua situasi. Sementara mereka mungkin efektif dalam meminimalkan limpasan di beberapa lokasi, efektivitasnya bervariasi di tempat lain bahkan di area perumahan yang sama. Oleh karena itu, metode infiltrasi LID dapat dipertimbangkan untuk meningkatkan efektivitas pengurangan. Penelitian ini memberikan wawasan bagi pengembang properti menuju perumahan ramah lingkungan dan pembangunan berkelanjutan dengan penerapan rain barrel dan LID.
Kata kunci: Low-Impact Development (LID), Strategi, Stormwater Management Model, Rain Barrel, Peak Runoff
Abstract
The conventional drainage face challenges exacerbated by increased surface runoff. Rain barrels are one of the Low Impact Development (LID) techniques that provide temporary storage which potentially can reduce runoff. Therefore, this study investigates the application of rain barrels to enhance flood resilience in Mastrip Housing. Using the Storm Water Management Model (SWMM), rainfall runoff was modeled under pre- and post-implementation conditions in 71 sub-catchments to assess LID infrastructure impact. Results reveal rain barrels can reduce peak runoff by 11% to 51%, averaging a 12% reduction. The effectiveness varies, influenced by rain barrel density, area coverage, and land use. There is trend revealed, exhibiting sub-catchments with small area and more rain barrel unit showing bigger peak runoff reductions, emphasizing the necessity of ratio consideration. Nonetheless, this study finds that the usage of rain barrels is not equally successful in all situations. While they may effectively minimize runoff in some locations, their efficacy varies elsewhere even in the same housing area. Therefore, infiltration LID methods can be considered to improve the effectiveness of reduction. This study provides insights for property developers towards environmentally friendly housing and sustainable development with rain barrel and LID implementation.
Keywords: Low-Impact Development (LID), Strategy, Stormwater Management, Rain Barrel, Peak Runoff
Keywords
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DOI: https://doi.org/10.29103/tj.v14i2.1142
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