The purpose of this research are to plan, design and estimate the construction cost of a communal wastewater treatment system in the Grand Ville Taba Lestari housing town of Lubuklinggau. The domestic wastewater, comes from businesses, residential activities, restaurants, offices, apartments and dormitories. The wastewater distribution system for residential area uses a shallow sewer system, namely domestic wastewater from sanitary ware (latrines, sinks, floor drain, kitchen sink, etc.) directly connected using a wastewater pipe and the wastewater distribution system in this design, uses a gravity system. Communal wastewater treatment plant is expected to prevent and reduce the occurrence of environmental pollution. From the site-plan, the maximum number of occupant are 369 persons, resulting in a wastewater debit of 40.51 m3/day. The designed dimensions of the wastewater treatment plant are based on the amount of wastewater produced, which is 9.5 m long, 3 m wide with a depth of 2 m. Piping network are 475.50 m of parcel pipe, 478.93 m of service pipe, 434.6 m of lateral pipe and 3 m of main pipe. The cost required for constructing the communal wastewater treatment plant in the Grand Ville Taba Lestari Housing is Rp. 335,500,000.00.-.
Beberapa tahun terakhir, persoalan sumber daya air menjadi topik hangat dalam pembicaraan khalayak ramai, di samping pemberitaan masalah politik yang selalu hingar bingar di negeri ini. Berbagai bencana sumber daya air, mulai dari banjir tahunan atau banjir bandang, waduk jebol, tanah longsor, instrusi air laut, penurunan muka air atau kekeringan, sampai kebakaran lahan gambut seolah olah tidak hentihentinya menerpa dan terjadi silih berganti. Terjadinya bencana sumber daya air dapat disebabkan oleh faktor alam seperti: curah hujan berlebihan, bencana tsunami, dan banjir lahar akibat letusan gunung api atau gempa bumi. Namun, bencana juga dapat disebabkan oleh perilaku manusia yang tidak pantas dan berlebihan terhadap bumi. Pembabatan dan penggundulan hutan secara berlebihan, pemanenan air tanah yang melebihi imbangan pengisiannya, kegiatan tambang galian dan tambang-tambang lainya tanpa mengindahkan pelestarian lingkungan, semuanya itu dapat mengakibatkan kerusakan tubuh bumi dan akan merusak kehidupan manusia.(Okma Yendri, dkk, 2019).
Angkutan umum memiliki karakteristik yang berbeda mulai dari mulai dari jenis kendaraan, harga kendaraan, jumlah kapasitas muat penumpang dan lain sebagainya sehingga Biaya Operasi Kendaraaan tiap jenis angkutan umum juga berbeda-beda yang berpengaruh pada tarif penumpang dan jenis Angkutan Umum. Adapun tujuan dari penelitian ini adalah untuk menghitung Biaya Operasi jenis Angkutan Umum Mini Bus Lubuk Linggau (Provinsi Sumatera Selatan) – Singkut (Provinsi Jambi), Untuk mengetahui selisih biaya antar tarif berdasarkan Dinas Perhubungan dengan tarif yang laksanakan saat ini. Pengambilan data dengan cara penyebaran kuesioner dan wawancara serta mengolahnya dengan menggunakan metode deskriptif kuantitatif. Dari hasil penelitian angkutan umum rute Lubuk Linggau – Singkut diperoleh Biaya operasi kendaraan mini bus dengan nilai BOK sebesar Rp. 152.578.139,- /tahun dan Rp. 2.337,29/km. Pendapatan bersih kendaraan mini bus sebesar Rp. 39.421.860,-/tahun dan Rp. 603,89/km. Sedangkan Biaya angkutan umum mini bus Rp.41.073,-/Penumpang, tarif yang berlaku saat ini Rp.50.000,-/Penumpang, dimana selisih Rp.8.927,-/Penumpang. Dari hasil analisa data dapat memberikan gambaran bahwa pengusaha angkutan umum memperoleh keuntungan, dimana pendapatan yang diperoleh lebih besar dibandingkan dengan biaya operasi kendaraan.
The fluctuations in Ketupak river water affect the amount of inundation that occurs in G Dwijaya Village, Tugumulyo Subdistrict, Musi Rawas Regency. The research aims to obtain a cross section of river channels to drain runoff water, so that runoff water due to maximum rainfall does not cause inundation. the Ketupak river channel is unable to float the flow discharge that occurs during the rainy season, besides that there is also a lot of sediment, garbage, trunks and branches that interfere with ketupak river flow, so a re-dimension of the river channel needs to be done. Based on the calculation of the Ketupak River discharge in the rainy season using the Chow formula method, flowrate (Q) is obtained at 5.22 m³ / sec. From the results of calculations According to the 5-year rainfall data from 2012-2016, Q = 0.719 m³ / s, so when the rainy season the flow in the river becomes 5.94 m³ / sec (Q ≤ Q max), to meet Q max = equal to 5.94 m³ / sec, it is necessary to add a river cross-sectional area of 12.33 m² to 15.63 m² so that Q is obtained at 5.94 m³ / sec (Q ≥ Q max).
River water fluctuations affect the amount of inundation that occurs. The study aims to obtain a cross-section of the river channel to drain runoff water so that the runoff due to maximum rainfall does not cause puddles. The Ketupak river flow cannot drain flow during the rainy season. Besides that, there is also a lot of sediment, garbage, stems and branches that interfere with the Ketupak river flow. Therefore, it is necessary to rearrange the river channel. From the results of calculations based on rainfall data, it is necessary to increase the cross-sectional area of the river.
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