PLANNING OF DRAINAGE AND RESERVOIR SYSTEMS IN MULTI OPTIMAL SENTOSA INDUSTRIAL ESTATE PHASE I PURWAKARTA REGENCY, WEST JAVA

• Main Author: Alif Fathan, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/75393
• Institution: Institut Teknologi Bandung

Sentosa Multi Optimal Industrial Estate is one of the industrial estates that is part of Jatiluhur Industrial Smart City located in Babakancikao, Purwakarta Regency, West Java divided into several stages 1, 2 and 3. Phase 1 planning is divided into two regions, namely the Cilangkap and the Cibarengkok Region. The planning of the drainage system was designed using a sustainable concept with a reservoir that acts as an outlet which was designed using a 5-year anniversary period with 95.88 mm of rain using the Pearson III Log distribution. In addition, river water level modeling was carried out at the outlet in each reservoir using a 20-year period design rain of 134.77 mm, then a peak discharge of 97.28 m3/s was obtained using the Nakayasu Synthetic Unit Hydrograph (SUH) method until the water level elevation was obtained at +46.60 m at the Cibarengkok outlet and +39.62 m at the Cilangkap outlet using HEC-RAS 6.20. The planning of the drainage system is carried out with EPA SWMM 5.20 which is divided into open channels and closed channels. The open channel is planned to use U-Ditch with the smallest size 0.50 x 0.50 m K-350 and the largest size 1.40 x 1.40 m K-350, while the closed channel is planned to use Box Culvert with the smallest size 0.80 x 0.80 K-350 and the largest size 1.50 x 1.50 m K-350. In the reservoir planning, the discharge entering the Cilangkap Reservoir is 5.08 m3/s so that the planned height of the 2.50 m reservoir covering an area of 3.46 hectares with a total reservoir of 81608 m3 while in the Cibarengkok Reservoir the incoming discharge of 6.08 m3 / s with a body height of 2.25 m covering an area of 2.86 hectares with a total reservoir of 65186 m3 is operated using an ogee type spillway and two sluices. The body of the reservoir is planned with soil embankment,then slope stability analysis using GeoStudio 2018 R2 with dry conditions, Normal Water Level, High Water Level conditions and dry conditions with earthquakes and obtained safety factors exceeding the minimum safety. To channel water from the reservoir to the river, a sewer channel is planned to use masonry with a channel length in Cilangkap of 148.50 m and 45.00 m with the same dimensions, namely a base width of 2.00 m and a depth of 0.70 m. Drainage systems and reservoirs are by carrying out routine, periodic maintenance, and repairs. The construction of the drainage system and reservoir has a Budget cost Rp 45,712,772,000.