PENERAPAN LOW IMPACT DEVELOPMENT UNTUK MENGURANGI DEBIT BANJIR DAS CITEPUS

Alhadihaq, - (2024) PENERAPAN LOW IMPACT DEVELOPMENT UNTUK MENGURANGI DEBIT BANJIR DAS CITEPUS. S1 thesis, Universitas Pendidikan Indonesia.

Abstract

Banjir di Jalan Pagarsih, yang merupakan bagian dari DAS Citepus, seringkali terjadi saat musim hujan. Permasalahan ini disebabkan oleh area tangkapan air yang padat pemukiman dan saluran drainase yang tidak mampu menampung debit air hujan. Kondisi saluran drainase yang buruk, seperti adanya sampah dan sedimentasi, menjadi penyebab utama genangan. Untuk mengatasi permasalahan ini, dilakukan penelitian mengenai penerapan Low Impact Development (LID) yang bertujuan mengurangi debit banjir di lokasi tersebut. Penelitian menggunakan metode deskriptif kuantitatif, dengan data primer diperoleh melalui peninjauan langsung ke lokasi, mencakup kondisi saluran, ukuran dimensi, dan elevasi saluran drainase. Data sekunder diperoleh dari pos curah hujan selama 10 tahun. Analisis menggunakan metode Log Pearson III menunjukkan nilai intensitas curah hujan 89,92 mm dengan periode ulang 5 tahun. Setelah analisis hidrologi dan hidrolika, pemodelan dilakukan menggunakan aplikasi PCSWMM. Hasil simulasi menunjukkan banjir pada 7 titik saluran. Untuk penanggulangan, diterapkan LID seperti raingarden, rainbarrel, bioretention cell, dan permeable pavement. Setelah penerapan LID, terjadi penurunan runoff terbesar sebesar 62,9% pada subcatchment 20 dan penurunan rata-rata sebesar 34,8%. Selain itu, dilakukan perubahan dimensi (redesign) pada 10 saluran, menghasilkan penurunan inflow sebesar 31,49% dibandingkan kondisi eksisting.

Flooding on Pagarsih Street, part of the Citepus watershed, frequently occurs during the rainy season. This issue is caused by densely populated catchment areas and the drainage channels that cannot accommodate runoff during rainfall. Poor drainage conditions due to the presence of garbage and sedimentation, is the main cause of flooding. For solution of this problem, a study on the application of Low Impact Development (LID) was conducted with the aim of reducing flood discharge at the research location. The research used a quantitative descriptive method, with primary data was obtained from a direct observation of the location, including the condition of the channels, dimensions of the drainage channels, and elevation. Secondary data was obtained from a 10 year rainfall station. The analysis calculation method uses the Log Pearson III method with a rainfall intensity value of 89.92 mm with a return period of 5 years. After conducting hydrological and hydraulic analyses, modeling was then carried out using the PCSWMM application. From the results of the existing condition simulation, it was found that flooding occurred at 7 points. To address this, the measures taken are the implementation of Low Impact Development (LID) in the form of rain gardens, rain barrels, bioretention cells, and permeable pavement. After the implementation of LID, the largest reduction in runoff value was obtained at 62.9% in subcatchment 20. and, the average reduction in runoff value was 34.8%. Additionally, redesigning the dimensions of 10 drainage channels resulted in a 31.49% reduction in inflow compared to existing conditions

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Item Type:	Thesis (S1)
Additional Information:	https://scholar.google.com/citations?hl=en&authuser=2&user=eZAMVlUAAAAJ ID SINTA Dosen Pembimbing : Rakhmat Yusuf NIDN : 0024046406 SINTA : 6003508
Uncontrolled Keywords:	PCSWMM, Low Impact Development, Banjir, Drainase
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Pendidikan Teknik dan Industri > Jurusan Pendidikan Teknik Sipil > Program Studi Teknik Sipil
Depositing User:	Alhadihaq -
Date Deposited:	26 Sep 2024 09:34
Last Modified:	26 Sep 2024 09:34
URI:	http://repository.upi.edu/id/eprint/126168

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