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.
Keyword: 

Judul: Analisis Pengaruh Perubahan Penutupan Lahan Terhadap Debit Sungai Cigede di DAS Kaliangke Hulu Bogor.
Abstrak: Pengelolaan daerah aliran (DAS) sungai yang buruk dapat menimbulkan bencana yang tidak dikehendaki. Di Kelurahan Mekarwangi Kecamatan Tanah Sareal kerap terjadi banjir sesaat terutama saat musim penghujan. Penelitian ini bertujuan mempelajari pengaruh perubahan penutupan lahan terhadap peningkatan debit dan menganalisis penyebab terjadinya genangan banjir di Kelurahan Mekarwangi. Analisis dilakukan dengan melakukan deliniasi dalam menentukan batas lokasi kajian dan membuat pemodelan dengan HEC-HMS berdasarkan keadaan sebenarnya. Berdasarkan hasil pemodelan, debit yang dihasilkan tahun 1996 sebesar 84.8 m3/detik, sedangkan debit yang dihasilkan pada tahun 2006 sebesar 107.9 m3/detik dan pada tahun 2015 sebesar 115.9 m3/detik. Hasil penelitian menunjukkan perkembangan pemukiman yang pesat dan luasan kawasan hijau yang menurun menyebabkan meningkatnya debit puncak rencana. Hal ini menandakan perubahan fungsi lahan mempengaruhi besar debit di daerah resapan air di bagian hulu SubDAS. Daerah tangkapan air yang terganggu akibat perubahan penggunaan lahan menyebabkan run off meningkat pada curah hujan yang tetap
Keyword: DAS, HEC-HMS, penutupan lahan, debit, limpasan

Judul: Aktivitas Antibakteri Minyak Biji Pala (Myristica fragrans H) Terenkapsulasi pada Pure Jambu Biji Merah (Psidium guajava L)
Abstrak: Preservation of fruit puree is highly dependent on the chemical preservatives and frozen storage temperature. Some species of plants have inhibitory activity of microbes and could be developed as a natural preservatives, such as nutmeg seed oil. Antibacterial activity of nutmeg seed oil encapsulated against Staphylococcus aureus, Escherichia coli, dan Lactobacillus delbrueckii with concentrations 0,06%, 0,12%, and 0,60% (w/v) were analyzed and applied into red guava puree. The inhibitory activities were indicated by decreased amount of bacteria with certain time by pour plate methode. The result showed that S. aureus was the most sensitive bacteria while L. delbrueckii was the most resistant bacteria. Concentration MBPTe 0,6% and contact time 24 hours can decrease S. aureus (2,14 log CFU/ml), E. coli (0,92 log CFU/ml), and L. delbrueckii (0,44 log CFU/ml). Application in red guava pure showed concentration 1,2% and contact time 6 hours reduced S. aureus (3,20 log CFU/ml) and E. coli (2,59 log CFU/ml) while L. delbrueckii after contact 24 hours (1,17 log CFU/ml).
Keyword: red guava puree, preservative, nutmeg seed oil, encapsulation