Penentuan Potensi Penerapan Infrastruktur Hijau dalam Mengurangi Genangan di Daerah Aliran Sungai Kedurus

Rahmasari, Hardianti Fitri (2017) Penentuan Potensi Penerapan Infrastruktur Hijau dalam Mengurangi Genangan di Daerah Aliran Sungai Kedurus. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Laju perkembangan permukiman di wilayah DAS Kedurus dari tahun 2001-2015 mengakibatkan daerah resapan berkurang dan limpasan permukaan meningkat. Hal tersebut tidak sebanding dengan kapasitas sungai Kedurus eksisting, sehingga genangan terjadi seluas 127 hektar (ha) dengan ketinggian 20 cm dan lama genangan ±40 menit pada tahun 2015. Upaya pemerintah berupa infrastruktur abu-abu (seperti peningkatan kapasitas drainase kota) belum dapat mengatasi permasalahan genangan tersebut. Oleh karena itu, penelitian ini bertujuan untuk menentukan potensi penerapan infrastruktur hijau di wilayah DAS Kedurus untuk dapat mengurangi genangan yang terjadi. Penelitian ini terdiri dari tiga tahapan penelitian. Tahap pertama yaitu melakukan analisis lokasi potensi sebaran infrastruktur hijau di wilayah DAS Kedurus menggunakan watershed delination dan select by attributes. Tahap kedua yaitu mengidentifikasi potensi penerapan infrastruktur hijau di wilayah DAS Kedurus berdasarkan preferensi stakeholders menggunakan content analysis. Tahap ketiga yaitu merumuskan penerapan infrastruktur hijau yang optimal dalam mengurangi genangan di wilayah DAS Kedurus berdasarkan analisis hidrologi menggunakan metode distribusi Log Pearson Tipe III dan metode SCS. Hasil penelitian menunjukkan bahwa volume genangan di wilayah DAS Kedurus sebesar 2.961.888,66 m3 dan infrastruktur hijau yang dapat diterapkan di DAS Kedurus yaitu kolam retensi, kolam detensi, sand filter, dan vegetated filter strip. Sedangkan menurut stakeholders, infrastruktur hijau yang dapat diterapkan yaitu kolam retensi seluas 190,09 Ha, dan penerapannya mengakibatkan genangan berkurang sebesar 0,31%. Kinerja ini masih menghasilkan pengurangan genangan yang tidak signifikan, maka dari itu dilakukan simulasi kembali berdasarkan pola ruang rencana dan ternyata hasilnya sama (1,24%). Peningkatan yang cukup tinggi terjadi ketika penerapan infrastruktur hijau (kolam detensi (2.613,21 ha), vegetated filter strip (666,73 ha), dan kolam retensi (1.150,99 ha)) mengikuti hasil analisa potensi sebaran dan mengusulkan pola ruang rencana yang baru berdasarkan pola ruang eksisting. Dengan skenario tersebut, maka pengurangan genangan dapat dilakukan sebesar 28,88%. =========================================================================== The rate of residential development within the Kedurus River Basin region from 2001-2015 has shrunk the absorption area and increased runoff. The reduction and increases are not aligned with the existing Kedurus river capacity causing a 127-hectares (ha) inundated areas with 20 cm height and ±40 minutes duration in 2015. The government’s effort of grey infrastructures (such as increasing the drainage capacity of the city) still cannot resolve the inundation. This research aims to identify potential applications of green infrastructures within Kedurus River Basin to decrease the inundation. The study consists of three research stages. The first stage is the analysis of the distribution of potential green infrastructure locations within Kedurus River Basin using watershed delineation and select by attributes. Stage two is the identification of potential green infrastructure applications within Kedurus River Basin based on stakeholders’ preference using content analysis. Stage three is the formulation of optimized green infrastructure applications to reduce the inundation within Kedurus River Basin based on hydrology analysis using Log Pearson Type III distribution and SCS method. The result of the research shows that the inundation volume within Kedurus River Basin is 2,961,888.66 m3 and the applicable green infrastructure in Kedurus River Basin are the retention basin, detention basin, sand filter, and vegetated filter strip. As according to stakeholders, the applicable green infrastructure is the retention basin of 190.09 ha, and its application may reduce the inundation by 0.31%. The result is considered as insignificant, and further simulation was conducted according to the spatial pattern plan with a similar result (1.24%). A significant increase is possible when the green infrastructure application (detention basin (2,613.21 ha), vegetated filter strip (666.73 ha), and retention basin (1,150.99 ha)) follows the result of potential distribution analysis and it suggests a new spatial pattern plan based on existing spatial pattern. With the scenario, the inundation can be reduced by 28.88%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Daerah Aliran Sungai Kedurus, Genangan, Infrastruktur Hijau, Water Sensitive City, Kedurus River Basin, Inundation, Green Infrastructure
Subjects: H Social Sciences > HT Communities. Classes. Races > HT166 City Planning--Environmental aspects
T Technology > T Technology (General)
Divisions: Faculty of Civil Engineering and Planning > Regional and Urban Planning > (S1) Undergraduate Theses
Depositing User: HARDIANTI FITRI RAHMASARI
Date Deposited: 05 Oct 2017 03:45
Last Modified: 04 Jan 2018 04:00
URI: http://repository.its.ac.id/id/eprint/44088

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