Judul: Analisis Hujan, Debit Puncak Limpasan dan Volume Genangan di Sekitar Jalan Meranti–Tanjung, Kampus IPB Darmaga Bogor
Abstrak: Floods are an annual problem in Indonesia which almost happens every year. Bogor Agricultural University is also not spared from floods. One of location is around Meranti-Tanjung Road. This study aims to analyze rainfall, discharge of runoff and volume of puddles that occurred around Meranti-Tanjung Road. The procedure consisted of field studies, literature studies and data analysis. Based on the analysis, the direction of water flow around Meranti-Tanjung Road flows to the northwest where there is a Ciapus river as downstream of flow. Catchment area divided into 2 areas. Runoff coefficient (C) is between 0.28-0.55. The maximum daily rainfall around Meranti-Tanjung Road is 125.68 mm for the 2-year return period. Largest runoff peak discharge occurred in sub DTA 1E is 1.83 m3/sec. Puddles occurred in sub DTA 1B, 1D and 2A. The largest volume of puddles based measurements occurred on 5 April 2014 (rainfall is 113 mm) is 8.40 m3 in the sub DTA 1B, at sub DTA 1B is 8.18 m3 and at sub DTA 2A is 8.92 m3. The entirety volume of puddles at sub DTA 1B is 544 m3, at sub DTA 1D is 11054.6 m3, and at sub DTA 2A is 335.8 m3.
Keyword: rainfall, puddles, peak runoff, catchment area

Judul: Analisis Hujan, Debit Puncak Limpasan dan Volume Genangan di Sekitar Gedung Graha Widya Wisuda - FEMA Kampus IPB Darmaga Bogor
Abstrak: IPB Darmaga’s Campus is a region that experienced flood when heavy rain occurred, especially around Graha Widya Wisuda building, Ramin Street, and Kamper Street (FEMA)’s region. This research aims to acquire and analyze rainfall, topography, and landuse data for planning data of zero-runoff drainage system which are peak runoff and volume of puddle data. Based on goodness-offit tests using Smirnov-Kolmogorov and statistical parameter analysis, it is acquired that Gumbel distribution is the best. Maximum daily rainfall (R24) for 2 year return period is 125.68 mm. Topographical condition’s survey produces 3 Water Catchment Area (WCA) with 13 Sub WCA. Results of peak runoff calculation are 0.278 m3/s for Sub WCA 1A, 0.385 m3/s for Sub WCA 1B, 0.297 m3/s for Sub WCA 1C, 0.415 m3/s for Sub WCA 2A, 0.558 m3/s for Sub WCA 2B, 0.160 m3/s for Sub WCA 2C, 1.095 m3/s for Sub WCA 2D, 0.351 m3/s for Sub WCA 2E, 1.069 m3/s for Sub WCA 2F, 2.162 m3/s for Sub WCA 2G, 0.218 m3/s for Sub WCA 2H, and 0.512 m3/s for Sub WCA 2I. The greatest volume of puddle for 1A and 2G Sub WCA are 401.82 m3 and 395.53 m3.
Keyword: zero runoff., volume of puddle, rainfall, peak runoff

Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
Keyword: