SUROSO, SUROSO (2019) ANALISIS SISTEM DRAINASE PERUMAHAN GRIYA INDAH SERPONG KECAMATAN GUNUNG SINDUR, KABUPATEN BOGOR. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Drainage is a very important part and cannot be separated from each development of a residential area. However, there is often a planning error from the developer so that problems often arise from these errors, namely the emergence of flooding where the existing drainage can’t accommodate and drain the runoff of water in the settlement. Then from that there needs to be an analysis of the drainage system to looking for the causes of these flood problems. The steps of analyzing the drainage system include primary and secondary data collection, in this drainage plan using 10-year rainfall data, topographic maps and contour maps. The rainfall data used are from the South Tangerang Climatology Station and Bogor Climatology Station 2008-2017. Analysis of planned rain was carried out by log Pearson III method. Test the consistency of the data using the Chi-square and Smirnov-Kolmogorov methods. Determination of the return period refers to the area of watershed and type of city according to the provisions of the PERMEN PU No12 / PRT / M / 2014. Rainfall intensity analysis plan is carried out using the equation Dr. Mononobe. While the planned discharge analysis is done by the Rational Method. Based on the results of the analysis, it was found: the intensity of the 2-year return rainfall was 95,0459mm / hour, and in the existing channel analysis found on the Q-16 channel it was found that the planned flood discharge was 0.121m3 / sec and the existing channel discharge was 0.069m3 / second. So the planned discharge is greater than the existing channel discharge so that there is a need for infiltration wells on the channel and after calculating it requires as many absorption wells as possible. m the joint channel between the primary channel on the TA segment is 2,3485 m3 / sec. Planning for infiltration wells produces dimensions of infiltration wells with a diameter of 1 meter and variations in depth of 1.5m, 2m and 3m. The planned infiltration well is able to reduce the flood discharge in the TA segment to 1.207 m3 / second or 48.6%. Channel planning produces five channel dimensions, namely circular section channels with diameters of 0.40m, 0.50m, 0.60m, 0.70m and 0.80m. Keywords: drainage, rational method, flood discharge, rainfall, infiltration well. Drainase merupakan bagian yang sangat penting dan tidak dapat dipisahkan dari setiap pengembangan suatu kawasan pemukiman. Akan tetapi sering terjadi suatu kesalahan perencanaan dari pengembang sehingga sering terjadi permasalahan yang timbul dari kesalahan-kesalahan tersebut yaitu timbul banjir dimana saluran drainase yang ada tidak dapat menampung serta serta mengalirkan limpasan air di pemukiman tersebut.Maka dari itu perlu adanya suatu analisa sistem drainase untuk mencari penyebab permasalahan banjir tersebut. Langkah-langkah analisa sistem drainase yaitu meliputi pengumpulan data primer dan skunder, pada perencanaan drainase ini menggunakan data curah hujan 10 tahun, peta topografi dan peta kontur. Data curah hujan yang digunakan yaitu dari Stasiun Klimatologi Tangerang Selatan dan Stasiun klimatologi Bogor 2008-2017. Analisis hujan rencana dilakukan dengan metode log pearson III. Uji konsistensi data dengan metode Chi-square dan Smirnov-Kolmogrov. Penentuan kala ulang mengacu pada luas DAS dan jenis kota menurut ketentuan PERMEN PU No12/PRT/M/2014. Analisis intensitas hujan rencana dilakukan dengan menggunakan persamaan Dr. Mononobe. Sedangkan analisis debit rencana dilakukan dengan Metode Rasional. Berdasarkan hasil analisis didapatkan: intensitas curah hujan kala ulang 2 tahun sebesar 95,0459mm/jam,dan pada analisa saluran existing ditemukan pada saluran Q-16 diketahui debit banjir rencana 0,121m3/detik dan debit saluran eksisting 0,069m3/detik. Jadi debit rencana lebih besar daripada debit saluran exsisting sehingga perlu adanya sumur resapan pada saluran tersebut dan setelah dihitung memerlukan sumur resapan sebanyak. mpada ruas gabungan antara saluran primer pada saluran segmen TA sebesar 2,3485 m3/detik. Perencanaan sumur resapan menghasilkan dimensi sumur resapan dengan diameter 1 meter dan kedalaman variasi 1,5m, 2m dan 3m. Sumur resapan yang direncanakan mampu mereduksi debit banjir pada segmen TA menjadi 1,207 m3/detik atau sebesar 48,6%. Perencanaan saluran menghasilkan lima dimensi saluran, yaitu saluran berpenampang lingkaran dengan diameter 0,40m, 0,50m, 0,60m, 0,70m dan 0,80m. Kata Kunci: drainase, metode rasional, debit banjir, curah hujan, sumur resapan.
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