Tawakkal, Alfath (2020) Pengembangan Kolam Retensi Dalam Upaya Mereduksi Banjir Kali Jeroan, Kabupaten Madiun. Diploma thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
10111815000058-Undergraduate_Thesis.pdf Download (5MB) | Preview |
Abstract
Banjir merupakan kondisi dimana air tidak dapat di tampung di sebuah saluran atau sumbatan air di saluran pembuangan. tingginya curah hujan yang menyertai dengan perubahan sistem tataguna lahan dapat meningkatkan permukaan aiar limpasan yang mengalir dengan cepat sehingga menyebabkan banjir. Sungai Jeroan dengan DAS-nya termasuk dalam wilayah Kabupaten Madiun, Provinsi Jawa Timur. Sungai Jeroan merupakan anak dari Sungai Bengawan Solo dengan hulu Sungai Jeroan yang terletak di Kecamatan Saradan dan hilir Sungai Jeroan yang terletak di desa Balerejo yang langsung bertemu dangan Sungai Bengawan Solo. Panjang Sungai Jeroan ± 34,84 km dan mempunyai luas DAS 314,34 km2. Debit yang dapat ditampung sungai adalah sebesar 179,73 m3/dt. Selanjutnya direncanakan normalisasi, normalisasi direncanakan sepanjang STA 276 - STA 232 dengan b = 15 m, h = 8 m, dan m = 1, dan sepanjang STA 228 - STA 0 dengan b = 20 m, h = 8 m, dan m = 1 dengan debit yang mampu ditampung sungai sebesar 226,82 m3/dt. Setelah dilakukan normalisasi, debit yang melewati Sungai tersebut masih belum tertampung seluruhnya ke dalam Sungai, berdasarkan perhitungan dengan menggunakan metode HSS Nakayashu, didapatkan debit dengan kala ulang 25 tahun sebesar 461,20 m3 untuk DAS Jeroan. Selanjutnya dilakukan penanganan dengan 2 buah kolam retensi, direncanakan kolam retensi dengan kapasitas sebesar 839310,12 m3 untuk kolam retensi 1 dan 535096,03 m3 untuk kolam retensi 2, dengan luas area kolam retensi sebesar 111.908 m2 untuk kolam retensi 1 dan 76.442 m2 untuk kolam retensi sedangkan untuk pintu air yang direncanakan menggunakan pintu bendung sebanyak 2 unit pada tiap kolam retensi dengan debit yang tereduksi dengan penanganan kolam retensi adalah sebesar 80,16 m3/dt atau sekitar 17%.
==================================================================================================================
Flood was a condition of the water that could not be accomodated in the excaust duct or the obstruction of waterflow in the exhaust duct. The high rainfall that accompanied by alteration of land-using system could increase the runoff water surface that flowed quickly and caused flooding. The Jeroan river and its watershed are included in Madiun Regency, East Java Province. The Jeroan River is a child of the Bengawan Solo River with the upstream of the Jeroan River which is located in Saradan Subdistrict and the downstream of the Jeroan River which is located in Balerejo Village which directly meets the Bengawan Solo River. The length of the Jeroan River is ± 34,84 km and has a watershed area of 314,34 km2. The discharge can be accomodated by the river is 179,73 m3/s, furthermore, normalization is planned along STA 276 - STA 232 with b = 15 m, h = 8 m, and m = 1 , and along STA 228 - STA 0 with b = 20 m, h = 8 m, and m = 1 with a discharge that can be accomodated by the river of 226,82 m3/s. After normalization, the discharge that passes through the river is still not completely accomodated into the river, based on calculation using the HSS Nakayashu method, the discharge with a return period of 25 years is 461,20 m3 for the offal watershed so that another alternative treatment is needed, namely with 2 pieces, retention pond, retention pond with a capacity of 839310,12 m3 for retention pond 1 and 535096,03 m3 for retention pond 2, with an area of 111.908 m2 for retention pond 1 and 76.442 m2 for retention pond 2 while for the floodgate it is planned to use 2 units in each retention pond with reduced discharge by handling the retention pond amounted to 80,16 m3/s or about 17%.
| Item Type: | Thesis (Diploma) |
|---|---|
| Uncontrolled Keywords: | Banjir, Normalisasi, Kolam Retensi flood, normalization, retarding basin. |
| Subjects: | Q Science > QC Physics > QC866.5 Climatology--Forecasting. Q Science > QC Physics > QC925 Rain and rainfall |
| Divisions: | Faculty of Vocational > Civil Infrastructure Engineering (D3) |
| Depositing User: | Alfath Tawakkal |
| Date Deposited: | 26 Aug 2020 02:51 |
| Last Modified: | 02 Jan 2024 07:52 |
| URI: | http://repository.its.ac.id/id/eprint/81254 |
Actions (login required)
 |
View Item |