Judul: Penentuan Batas Ambang Curah Hujan Penyebab Banjir (Studi Kasus DAS Ciliwung Hulu)
Abstrak: One of the flood occurrences that always causes loss to the state almost every year is the Flood of Jakarta. The loss might be minimized if the flooding discharge is able to be early predicted. The objective of this study determined rainfall generating flooding. We applied multiple regression method to develop relation between rainfall and discharge in Ciliwung Hulu Sub-Watershed. Rainfall data from three stations (Gunung Mas, Citeko, and Katulampa) and flood discharge at Bendung Katulampa were used in this study. This study consist of three categories model, the first model was relation of every station against discharge Alert IV until Alert I, the second model was relation of stations against discharge in 1996 – 2008, and the last model was relation of stations against disharge which was not use zero data of rainfall or disharge with the same period. Model for estimating rainfall threshold using Multiple Linear Regression has been incompatible to be developed for flood early warning. Because small value of determination coefficien which was only less than 50%. Based on the first model the rainfall causes of flood was undeterminable. The second model gave rainfall threshold for Gunung Mas, Citeko and Katulampa as value as 183 mm, 176 mm, and 149 mm. Variance inflation factor for Gunung Mas, Citeko and Katulampa as value as 1.5, 1.4, and 1.1, p-value was 0.000, and R2 was 33.6%. The third model gave threshold rainfall as value as 253 mm, 253 mm and 125 mm, with variance inflation factor for Gunung Mas, Citeko and Katulampa as value as 1.4, 1.4, and 1.0, p-value was 0.000, with R2 was 24.6%. Based on the historical data, flood is usually happened on January and February. To minimize the loss, in that month the official functionary in upstream should be ready in reporting the discharge for the downstream official functionary.
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Judul: Analisis Curah Hujan, Debit dan Tutupan Lahan di Sub DAS Ciliwung Hulu
Abstrak: Large floods that occurred in the Jakarta in 1996, 2002, 2007 and 2013 respect of Ciliwung watershed. Factors that cause flooding are basically two things that rainfall and land cover. The aim of study to analysis of frequency to predict the opportunity of maximum rainfall in one day, 2 days, and 3 days, as well as to analyze the maximum daily discharge in the return period of 5, 10, 25 and 50 years and to analysis change of land cover in Ciliwung up stream. The analysis result shows that the maximum rainfall in the period of 5, 10, 25 and 50 years are respectively 130 mm, 160 mm, 200 mm and 229 mm/day. While the opportunity of 2 day-maximum rainfall in the same return periods are 168 mm, 202 mm, 248 mm, and 283 mm respectively. The opportunity of 3 day maximum rainfall in the same return periods are 215 mm, 268 mm, 337 mm, and 389 mm respectively. The opportunity of maximum daily discharge in the return periods of 5, 10, 25 and 50 years are 470 m3/s; 565,5 m3/s; 703,4 m3/s, and 819,5 m3/s respectively. The minimum daily discharge in the same return periods are 1,4 m3/s; 1 m3/s; 0,7 m3/s; and 0,6 m3/s respectively.The average increase in the area woke up from 1996 to 2011 was 71.8 ha/year.
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Judul: Karakteritsik kimia dan organoleptik tablet effervescent putih telur bersitarasa lemon dengan konsentrasi effervescent mix yang berbeda
Abstrak: Egg is an animal origin food product which has high nutritional value especially protein. Cholesterol content of eggs is only found in egg yolk, on the other hand albumen does not countain cholesterol at all but high content of protein, so it can be used as a free cholesterol-protein sources. The application of albumen as egg instant drink effervescent tablet can be an alternative of protein source for people who need free-cholesterol diet. It can also become an egg product diversification.
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