Judul: Analisis Pendugaan Limpasan di Perumahan Tamansari Persada, Bogor
Abstrak: Runoff is affected by various factors, i.e., meteorological factor represented by precipitation and regional flow factor stated the regional drainage physical properties. The change in land characteristics from natural land into developed land will reduce the absorption function in catchment areas and increase runoff. The situation could lead to the occurrence of flood if the planning of drainage at a residential area is not good. It often happens in Tamansari Persada Residence in Bogor. A study was conducted with the objective to identify the direction of runoff (incoming flow and outgoing flow) and to predict runoff in the Tamansari Persada Residence. The methods used in this study were literature review and field study. The material used included Google Earth satellite image acquisition of September 12, 2012, the rainfall data from Atang Sanjaya Weather Station at Bogor from 2003 until 2012 and topographic contour map of the residence. From the observation and analysis, the direction of runoff in the Tamansari Persada Residence followed the topographic from the south to the north. The total discharge of runoff reached 1.31 m3 s-1 in the area of 27.98 ha.
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Judul: Analisis Hubungan Curah Hujan dengan Volume Genangan Air di Perumahan Tamansari Persada, Bogor
Abstrak: Negative impact due to the disappearence of water catchment is the decrease of land capability to infiltrate rainwater causing run off, ponding water or even flooding. This research was conducted with anobjective to know a relationship between rainfall and volume of the ponding water. The location selected in this research was Tamansari Persada Residence in Bogor between March until April 2013. The research was conducted in two phases, which were primary data collection by measuring coordinate points of the ponding water and secondary data collection of daily rainfall. Gridding method based on Surfer 8 was used to calculate the volume. The results showed linear equation relationships between rainfall and volume of ponding water at Location 1 is y = 14.80x - 1.456 with the coefficient of determination 0.558, in Location 2 is y = 30.56x + 96.18, with the coefficient of determination 0.901, and Location 3 linear is y = 53.16x + 46.89, with the coefficient of determination 0.685. The small coefficient of determinations at Locations 1 and Location 3 might be caused by several factors such as ineffective use of time measurement.
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Judul: Pengembangan Etil Ester Minyak Sacha Inchi dan Karakteristiknya sebagai Bahan Baku Kosmetik
Abstrak: PT Eteris Prima Wiyasa mengembangkan produk-produk kecantikan yang berasal dari minyak sacha inchi. Namun, minyak sacha inchi sebagai bahan baku kosmetik memiliki viskositas yang cukup tinggi sehingga memiliki tingkat penyerapan dalam kulit yang rendah. Penelitian ini bertujuan untuk mengembangkan etil ester minyak sacha inchi, uji karakteristik, dan menganalisis kandungan etil ester minyak sacha inchi untuk digunakan sebagai solusi bahan aktif pada produk perawatan kulit dalam sediaan kosmetik pengganti minyak sacha inchi. Metode yang digunakan yaitu desain keteknikan yang meliputi fase eksplorasi, fase pendefinisian masalah, fase ideasi, fase pengembangan prototipe serta fase validasi. Hasil penelitian didapatkan etil ester minyak sacha inchi memiliki viskositas yang lebih rendah dari minyak sacha inchi sehingga daya sebar dan daya serapnya lebih tinggi. Metode pengembangan etil ester minyak sacha inchi yang terbaik menggunakan Microbubble nitrogen dengan aerator batu akuarium selama 1,5 jam. Etil ester cukup stabil selama masa penyimpanan didua suhu yang berbeda dibandingkan minyak sacha inchi. Dalam etil ester minyak sacha inchi terbukti mengandung omega 3, omega 6, dan omega 9., PT Eteris Prima Wiyasa develops beauty products derived from sacha inchi oil. However, sacha inchi oil as a cosmetic raw material has a fairly high viscosity so that it has a low absorption rate in the skin. This study aims to develop sacha inchi oil ethyl esters, test characteristics, and analyze the content of sacha inchi oil ethyl esters to be used as a solution for active ingredients in skin care products in cosmetic preparations to replace sacha inchi oil. The method used is engineering design which includes the exploration phase, problem definition phase, ideation phase, prototype development phase and validation phase. The results showed that sacha inchi oil ethyl ester has a lower viscosity than sacha inchi oil so that its spreadability and absorbency are higher. The best development method of sacha inchi oil ethyl ester was using Microbubble nitrogen with aquarium stone aerator for 1.5 hours. The ethyl ester was quite stable during storage at two different temperatures compared to sacha inchi oil. The ethyl ester of sacha inchi oil was shown to contain omega 3, omega 6, and omega 9.
Keyword: Sacha Inchi, Sacha Inchi, etil ester, kosmetik, minyak sacha inchi, microbubble, ethyl esther, cosmetics, sacha inchi oil, microbubble