Judul: Analisis Kapasitas Simpan Air pada DAS Cisukabirus, Kabupaten Bogor, Jawa Barat
Abstrak: Kerusakan DAS dapat ditandai dengan terjadinya perubahan tata guna lahan dari daerah tangkapan hujan berubah menjadi tanah terbuka. Tujuan dari penelitian ini adalah menentukan status daya dukung lingkungan DAS Cisukabirus, menghitung kapasitas simpan air, serta memberikan rekomendasi dalam upaya pengelolaan limpasan di DAS Cisukabirus. Metode yang digunakan berupa analisis data dari peta tata guna lahan, serta data iklim dari tahun 2006 sampai 2015. Status daya dukung lingkungan DAS Cisukabirus tergolong kedalam overshoot dengan nilai kebutuhan sebesar 143.2 x 106 m3/tahun dan ketersediaan air sebesar 34.24 x 106 m3/tahun, sehingga terjadi defisit air sebesar 108.9 x 106 m3/tahun. Kapasitas simpan air pada DAS Cisukabirus pada tahun 2015 diperoleh sebesar 3.2 x 106 m3/tahun. CHlebih diperoleh sebesar 22.4 x 106 m3/tahun dan limpasan yang terjadi sebesar 8.9 x 106 m3/tahun, sehingga pengisian air tanah sebesar 13.6 x 106 m3/tahun. Dalam pengelolaan kelebihan limpasan pada DAS Cisukabirus dapat dilakukan konservasi dengan membangun lubang resapan biopori, sumur resapan, serta penghijauan.
Keyword: DAS Cisukabirus, daya dukung lingkungan, kapasitas simpan air, limpasan

Judul: Analisis Kapasitas Simpan Air pada DAS Cisarua, Kabupaten Bogor
Abstrak: Watershed degradation could be characterized by changes in land use of catchment area with low run off coefficient to bare land with high run-off coefficient. Water balance calculation using Tornthwaite equation could be used to calculate fluctuation of water storage in a region. Water balance analysis was conducted at the Cisarua watershed with total area of 2491.90 ha. The objective of this research were to analyse water storage capacity, to calculate water avaibility (based on rainfall data), to calculate water demand, and to provide recommendations of run-off and groundwater recharge management in Cisarua watershed areas. Based on ideal ratio of run-off and groundwater recharge, the composition of the forest area of 50% in Cisarua watersheds is considered ideal, because it has a percentage of run-off by 51%. Residential area composition in Cisarua watershed (30%) is considered ideal, because the run off percentage is 49%. Environmental carrying capacity based on water balance of an area could be determined by calculating the capacity of water availability in the region. With a density of 2080 habitant / km2 and precipitation of 1870.1 mm / year, it could know that Cisarua watershed areas in 2010 were in the state of overshoot. Conservation methods that could be used in efforts to manage run-off excess were the construction of infiltration wells and reforestation
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Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
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