Arahan Mitigasi Bencana Banjir Di Perumnas Antang Dengan Konsep Ekodrainase (Sumur Resapan)
DOI:
https://doi.org/10.35965/jups.v6i1.716Kata Kunci:
Mitigasi, Bencana Banjir, EkodrainaseAbstrak
Abstract. Ecodrainage is a process of managing rainwater and its runoff in an integrated and environmentally sound manner. Perumnas Antang is one of the areas that is densely populated with buildings and residents in Manggala District, Makassar City. Knowing the existing drainage conditions are not in accordance with the capacity needed in Perumnas Antang.The application of infiltration wells in the existing area is adjusted to the problems that occur in Perumnas Antang, namely the high intensity of rainfall which results in inundation on the surface and cannot penetrate properly into the soil. By knowing the function of the infiltration well itself, which is to collect rainwater and absorb it from soil problems before being flowed into rivers or the sea. To analyze it, a superimpose or overlay analysis is used to determine the level of flood vulnerability in Perumnas Antang. The overlay process is carried out by combining several base maps that have their own dignity. After knowing the level of flood vulnerability in Perumnas Antang, an analysis of infiltration wells was carried out using the formula for calculating the Volume of Wells and the Number of Infiltration Wells needed at the research location by looking at the standard capacity capacity. The flood vulnerability level at the research site has three classifications, namely a high vulnerability level of 228.77 Ha, a medium vulnerability level of 63.56, and a low vulnerability level of 11.94. From the results of the analysis of the flood vulnerability level, an analysis of infiltration wells was carried out to determine the number of wells needed. From the results of the analysis of infiltration wells that have been calculated based on the volume and flow rate that has been inflowed, the number of infiltration wells needed is 23 units..
Abstrak. Ekodrainase merupakan suatu proses pengelolaan air hujan dan limpasannya secara terpadu damn berwawasan lingkungan. Perumnas Antang merupakan salah satu Kawasan yang padat bangunan dan penduduk di Kecamatan Manggala Kota Makassar. Mengetahui kondisi drainase eksisting tidak sesuai dengan kapasitas daya tampung yang di butuhkan di Perumnas Antang.Penerapan Sumur Resapan di kawasan eksisting di sesuaikan dengan pemasalahan yang terjadi di perumnas antang yaitu tingginya intensitas curah hujan yang mengakibatkan genangan di atas permukaan dan tidak dapat meresap dengan baik kedalam tanah. Dengan mengetahu fungsi dari sumur resapan sendiri yaitu untuk mmanmpung air hujan dan meresapkannya kedala tanah sebelum di alirkan ke sungai atau laut. Untuk menganalisisnya, di gunakan analisis superimpose atau overlay untuk mengetahui tingkat kerawanan banjir yang ada di Perumnas Antang. Proses overlay dilakukan dengan cara menggabungkan beberapa peta dasar yang memiliki harkat masing-masing. Setelah mengetahui tingkat kerawanan banjir di Perumnas Antang, maka di lakukan analisis sumur resapan dengan menggunakan rumus perhitungan Volume Sumur dan Jumlah Sumur Resapan yang di butuhkan di lokasi penelitian dengan melihat standar kapasitas daya tampung. Tingkat kerawanan banjir di lokasi penelitian memiliki tiga klasifikasi yaitu tingkat kerawanan tinggi seluas 228,77 Ha, tingkat kerawanan sedang seluas 63,56, dan tingkat kerawanan rendah seluas 11,94. Dari hasil analisis tingkat kerawanan banjir maka di lakukan analisis sumur resapan untuk mengetahui jumlah sumur yang di butuhkan. Dari hasil analisis sumur resapan yang telah di hitung berdasarkan volume dan beit aliran yang masuk, maka di peroleh jumlah sumur resapan yang di butuhkan yaitu sebanyak 23 unit.
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