Judul: Rancangan Bangunan Hidrolika Pemanfaatan Air Limpasan di Perumahan Bogor Nirwana Residence, Kota Bogor, Jawa Barat
Abstrak: The area of Bogor Nirwana Residence (BNR) is located on the southrern part of Bogor. However to maintain the environmental sustainability, it is needed to reuse runoff at BNR. The purpose of this research were to identify water quality of runoff, to design water reuse system and its hydraulic structure. The research was consisted of three stages, namely the identification of runoff water quality, analyzing water reuse system and designing the hydraulic structure. Some methods were used include a survey, grab sampling, and weir method. This research was held in BNR Residence from April to September 2013. The Outlet were chosen is located on Panorama Cluster with maximum runoff are 2.97 m3/sec. The result of discharge measured was 0.414 m3/det with maximum rainfall intensity by 7.2 mm/hour. Based on PP No.82 Tahun 2001, the runoff quality is in 3d class with valued by parameter chosed on TSS; 112 mg/l, BOD; 3.7 mg/l, COD; 14.23 mg/l, PH; 7.06, and Total Coliform; 23 MPN/100 ml. Water reuse system planning consisted of presedimentation tank, sedimentation tank, and reservoir. The maximum capacity of reservoir was 1006.16 m3 with water level as high as 570 cm. Other components of each structures must have the intake, inlet, outlet, weir and flushing channel. The main material for hydraulic structures was used concrete with high water resistence K250. The results of water treatment can be used for irrigation, waterpark activity, and to cover some of domestic demands.
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Judul: Analisis dan Desain Bangunan Hidrolika dengan Konsep Zero Runoff di Perumahan Taman Sari Persada, Bogor
Abstrak: Nowdays flooding is not only experienced by residential area located on the lower plains, but also experienced by residential located on the plateau. Taman Sari Persada, Bogor, is one of the luxury residential that was not spared from such disasters. Study was conducted in the residential area with the goal of getting a rainwater infiltration system to reduce the risk of flooding. First of all, field observation, rain analysis and estimating hydrolic conductivity were conducted to be a reference in determining hydraulic design of water infiltration building. After that calculations should be done to determine the volume of flooding, infiltration capacity and effectiveness of the resulting infiltration. The research showed that flood discharge in Taman Sari Persada residential is about 6489.33 m3. To overcome this flooding problem, infiltration wells can be built at some homes and building an infiltration system along the main drainage channel in the residential area. These infiltration systems are estimated to reduce about 54.87% of the flood discharge occurring or about 3560.46 m3 of water. Furthermore, the rest of the runoff that is not absorbed is expected to be accommodated by the existing drainage channel.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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