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All Journal RISTEK : Jurnal Riset, Inovasi, dan Teknologi Kabupaten Batang RISTEK: Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang JTTT
Hidayat, Reza Januar
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Health Professions Law, Crime, Criminology & Criminal Justice Social Sciences Transportation Other

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Analisis Kolam Retensi Sebagai Sistem Pengelolaan Banjir (Studi Kasus: Saluran Pembuang Gelam, Kecamatan Pasar Kemis, Kabupaten Tangerang) Lingga, Faya Nabasa br.; Namara, Idi; Siregar, Chandra Afriade; G.R, Gandjar; Pratiwi, A. Andini Radisya; Hidayat, Reza Januar; Widyanto, Bambang Eko
English Vol 3 No 1 (2025): Volume 3 - Nomor 1 - Mei 2025
Publisher : Fakultas Teknik dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47970/jttt.v3i1.859

Abstract

Banjir merupakan salah satu bencana alam yang sering terjadi di Indonesia, termasuk di Kecamatan Pasar Kemis, Kabupaten Tangerang. Faktor utama penyebab banjir di wilayah ini adalah tingginya curah hujan, buruknya sistem drainase, serta meluapnya sungai yang melewati daerah tersebut, seperti Sungai Cirarab dan Saluran Pembuang Gelam. Untuk mengatasi permasalahan ini, diperlukan suatu sistem pengelolaan banjir yang efektif, salah satunya melalui pembangunan kolam retensi. Penelitian ini bertujuan untuk menganalisis kebutuhan volume kolam retensi sebagai sistem pengelolaan banjir di Kecamatan Pasar Kemis serta menentukan efektivitasnya dalam mereduksi debit banjir. Metode yang digunakan dalam penelitian ini adalah pendekatan kombinasi kuantitatif dan kualitatif. Analisis hidrologi dilakukan dengan menggunakan perangkat lunak Hydrognomon untuk memperoleh debit banjir rencana dengan metode HSS Snyder-Alexeyev. Selanjutnya, pemodelan hidrolika dilakukan dengan perangkat lunak HEC-RAS untuk menganalisis volume genangan serta efektivitas kolam retensi dalam mengurangi banjir. Hasil analisis menunjukkan bahwa debit banjir rencana di Saluran Pembuang Gelam untuk periode ulang 2 hingga 100 tahun berkisar antara 5,56 m³/det hingga 17,40 m³/det. Alternatif terbaik untuk volume kolam retensi yang dirancang adalah Alternatif 6, yaitu kolam dengan kapasitas 30.000 m³ serta dilengkapi dengan tiga pompa. Alternatif ini mampu mengurangi luas genangan dari 1.795,7 m² menjadi 831,8 m². Hasil pemodelan dengan HEC-RAS menunjukkan bahwa keberadaan kolam retensi dapat mengurangi volume banjir hingga 53,68%.
ANALISIS DAMPAK HIDROLOGI PERUBAHAN TUTUPAN LAHAN BERDASARKAN RENCANA TATA RUANG WILAYAH: STUDI KASUS DAS SAMBONG KABUPATEN BATANG Nugraha, Mustofa Fajar; Hidayat, Reza Januar; Indriyani, Retno Ajeng Mega
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 10 No 1 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v10i1.213

Abstract

Floods are the most common disasters in Central Java, caused by rapid urbanisation and land-use changes. This research utilises HEC-HMS continuous simulation to assess the impact of land-use planning on runoff behaviour in the Sambong Watershed, Batang Regency. The analysis compares land cover data from 2017 and 2023 with the spatial pattern projection of the 2019-2039 Spatial Plan, using daily rainfall data from 2014 to 2023. Model calibration and validation yielded satisfactory results (NSE 0.553 to 0.655, R2 0.65 to 0.67, PBIAS -5.81 to 3.47, RSR 0.668 to 0.587). Results show that increased built-up areas lead to higher peak discharges, increased runoff volume, and high flow (Q5%, Q10%, Q20%) increase, while low flow (Q80%, Q90%, Q95%) decrease, indicating increased flood risk during rainy seasons and higher drought susceptibility during dry periods. Sub-watersheds S5 and S7 experience the most significant increases in built-up areas, at 78.57% and 213.24%, respectively, with peak discharge increases of 4.20% and 27.37%. These findings suggest that the current spatial plan may exacerbate flood hazards and reduce dry season water availability, underscoring the need for improved land-use controls and integrated watershed management to ensure sustainable development and water resource conservation in Batang Regency.
ANALISIS DAMPAK HIDROLOGI PERUBAHAN TUTUPAN LAHAN BERDASARKAN RENCANA TATA RUANG WILAYAH: STUDI KASUS DAS SAMBONG KABUPATEN BATANG Nugraha, Mustofa Fajar; Hidayat, Reza Januar; Indriyani, Retno Ajeng Mega
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 10 No 1 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v10i1.213

Abstract

Floods are the most common disasters in Central Java, caused by rapid urbanisation and land-use changes. This research utilises HEC-HMS continuous simulation to assess the impact of land-use planning on runoff behaviour in the Sambong Watershed, Batang Regency. The analysis compares land cover data from 2017 and 2023 with the spatial pattern projection of the 2019-2039 Spatial Plan, using daily rainfall data from 2014 to 2023. Model calibration and validation yielded satisfactory results (NSE 0.553 to 0.655, R2 0.65 to 0.67, PBIAS -5.81 to 3.47, RSR 0.668 to 0.587). Results show that increased built-up areas lead to higher peak discharges, increased runoff volume, and high flow (Q5%, Q10%, Q20%) increase, while low flow (Q80%, Q90%, Q95%) decrease, indicating increased flood risk during rainy seasons and higher drought susceptibility during dry periods. Sub-watersheds S5 and S7 experience the most significant increases in built-up areas, at 78.57% and 213.24%, respectively, with peak discharge increases of 4.20% and 27.37%. These findings suggest that the current spatial plan may exacerbate flood hazards and reduce dry season water availability, underscoring the need for improved land-use controls and integrated watershed management to ensure sustainable development and water resource conservation in Batang Regency.
Co-Authors G.R, Gandjar Idi Namara Indriyani, Retno Ajeng Mega Lingga, Faya Nabasa br. Nugraha, Mustofa Fajar Pratiwi, A. Andini Radisya Siregar, Chandra Afriade Widyanto, Bambang Eko