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Upaya Pencegahan Banjir Perkotaan Studi Kasus: Kali Kuncir, Kecamatan Ngetos, Kabupaten Nganjuk Rahma, Sukma Laksita
Jurnal Pendidikan Tambusai Vol. 6 No. 1 (2022): 2022
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v6i1.3671

Abstract

Banjir perkotaan merupakan fenomena alam yang rentan dialami hampir setiap kota di Benua Asia. Risiko banjir telah meningkat di seluruh dunia karena pemukiman di dataran banjir (floodplain) dan efek dari perubahan iklim (meningkatnya frekuensi kejadiaan cuaca ekstrim). Kali Kuncir merupakan salah satu sungai besar yang memiliki peran penting dalam sistem pengairan di Kabupaten Nganjuk. Namun, saat musim penghujan dengan curah hujan yang tinggi, Kali Kuncir tidak mampu menampung sehingga airnya meluap. Luapan air sungai tersebut mengakibatkan banjir perkotaan di Kabupaten Nganjuk sejak tahun 2021 hingga kini meskipun telah dilakukan beberapa tindakan preventif untuk mencegah terjadinya banjir perkotaan. Penelitian ini dilakukan untuk memberikan alternatif solusi pencegahan banjir dan manajemen risiko di Kabupaten Nganjuk. Penelitian literature review ini menggunakan metode pencarian referensi melalui google dengan beberapa kata kunci.
Assessing Urban Flooding and Drainage System Performance in Urban Area: A Mononobe Equation and Manning Formula Approach Rahma, Sukma Laksita; Sunarsih; Mussadun
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 3 (2024): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.14.3.463

Abstract

Climate change causes erratic rainfall and often results in flooding of urban areas. Floods are hydrometeorological disasters that occur in various regions of Indonesia. Flood vulnerability in urban areas has increased over the past 30 years. Kauman Village is included in the Asri water catchment area, which has an Asri primary channel downstream of the urban area of Nganjuk District. However, from 2019 to 2022, the urban area of Nganjuk District, including Kauman Village, was affected by flooding. Urban floods inundated office areas, schools, housing, and public facilities such as the Nganjuk District General Hospital. The factor indicated as the cause of flooding is the clogging of the drainage channel with rubbish. Therefore, field research and mathematical calculations were conducted to evaluate the discharge capacity of drainage channels in the village. Based on the research, it was found that the existing drainage channel discharge in the research area could not accommodate the planned discharge for the 10-year return period. In addition, there are 33 channels that are unable to accommodate the planned discharge because the channeldimensions are too small, some channels are slightly damaged, sedimentation occurs, and they are blocked by rubbish. Drainage channels that do not function optimally affect urban flooding. Therefore, several efforts have been made to reduce the risk of flooding by changing the dimensions of drainage channels, normalizing drainage channels, and getting used to maintain drainage channels and not throwing rubbish in drainage channels.