Pemodelan Numerik Sistem Drainase Kawasan Citraland Dengan Beberapa Alternatif Solusi Penanganan Banjir

Dwiuntoroadi, Sih (2020) Pemodelan Numerik Sistem Drainase Kawasan Citraland Dengan Beberapa Alternatif Solusi Penanganan Banjir. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Banjir terjadi apabila sistem drainase yang ada tidak mampu menampung debit yang mengalir, karena kapasitas sistem drainase yang menurun, debit aliran air yang meningkat, atau kombinasi dari keduanya. Pada tanggal 31 Januari 2019, hujan deras selama dua jam menyebabkan perumahan Citraland mengalami banjir hingga setinggi satu meter. Penelitian ini bertujuan untuk mengatasi permasalahan banjir yang ada melalui pengkajian sistem drainase sub surface untuk daerah berbukit pada kawasan perumahan Citraland, Surabaya. Data hujan tahunan dari stasiun hujan di sekitar kawasan perumahan akan diolah sesuai dengan proporsi luas areanya untuk mendapatkan analisa hujan rencana yang akan dipakai dalam pemodelan. Data hujan rencana, data luas dan jenis tutupan lahan, data luas catchment area dianalisis secara hidrologi untuk mendapatkan Debit Rencana. Data hidrolika dimensi sistem drainase existing akan dianalisis kapasistasnya dalam mengalirkan Debit Rencana. Sistem Drainase kemudian dimodelkan menggunakan aplikasi Storm Water Management Model (SWMM). Dengan menggunakan data topografi dan tutupan lahan, dapat dimodelkan empat alternatif solusi yang meliputi penambahan tampungan air di berbagai lokasi perumahan untuk mengatasi banjir yang ada. Hasil dari penelitian ini adalah skenario pertama melalui penambahan satu tampungan air pada lokasi 2 dapat menangani banjir paling efektif karena mengurangi 34,61% volume genangan yang terjadi. Skenario 3 melalui penambahan dua tampungan air dapat mengurangi 49,83% volume genangan. Dan skenario keempat melalui penambahan tiga tampungan air dapat mengurangi 57,82% volume genangan yang terjadi. ======================================================================================================================== Flooding occurs when the existing drainage system is unable to accommodate the water flow, that is due to a decreased drainage system capacity, increased flow of water, or a combination of both. On January 31, 2019, two hours of heavy rain caused Citraland housing to be flooded up to one meter high. This study aims to overcome the existing flooding problems through the assessment of sub-surface drainage systems for hilly areas in the Citraland residential area, Surabaya. Annual rainfall data from the rain stations around the residential area will be processed according to the proportion of the area to get a rain analysis plan that will be used in modeling. Plan rainfall data, area data and types of land cover, and catchment area data are analyzed hydrologically to get the design discharge. The hydraulic data of the dimensions of the existing drainage system will be analyzed for the capacity in flowing of Flow Plan. The Drainage System is then modeled using the Storm Water Management Model (SWMM) application. Through using topographic data and land cover, four alternative solutions have been modeled which include the addition of water reservoirs in various housing locations to overcome existing flooding. The results of this study are the first scenario through the addition of one water reservoirs on location 2 which can handle flooding most effectively because it reduces 34.61% of the inundation volume that occurs. Third scenario through the addition of two water reservoirs reduces 49.83% of inundation volume. And the fourth scenario through the addition of three water reservoirs can reduce 57.82% of the inundation volume that occurs.

Item Type: Thesis (Masters)
Uncontrolled Keywords: banjir, sistem drainase, SWMM, tampungan air. flood, drainage, SWMM, water reservoirs.
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TD Environmental technology. Sanitary engineering > TD395 Reservoirs (water supply)
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis
Depositing User: Sih Dwiuntoroadi
Date Deposited: 24 Aug 2020 07:42
Last Modified: 24 Aug 2020 07:42
URI: http://repository.its.ac.id/id/eprint/80758

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