Judul: Perubahan Lahan dan Debit Sungai di DAS Ciasem Subang Jawa Barat
Abstrak: The changes of surface run off and river discharge caused by landuse changes, could be estimated by watershed hydrology models. Soil and Water Assessment Tool (SWAT) model is a hydrology model that developed to predict effect of land use not only to water yield, but also sediment, pesticide contents, and chemical result of agriculture. Previous research of SWAT model application in Ciasem sub-watershed (5 659.6 Ha) by using global and local data show that the prediction average monthly discharge was appropriately match with measured average with the values of R2 and NS were > 0.51 and > 0.74 respectively. This research applied SWAT model to predict river discharge changes due to landuse change in the entire Ciasem watershed (67 794.8 ha). The purpose of this research is to predict changes in discharge due to changes in land use in the Ciasem watershed using SWAT model. Landuse changes in 2006-2011 occurred at forest plants being mixture of dryland farming, were 696.5 ha and forest plants being farms, were 131.8 ha. Simulation result of run off and discharge in landuse 2006 and 2011 and input climate 2006 showed it increase the runoff by 0.4 mm/month (4.8 mm/year) and discharge by 0.05 mm/month (0.6 mm/year). Land use simulation which changes mixture of dryland and dryland farming become forest plants reduce run off by 1.3 mm/month (15.6 mm/year) and discharge by 0.7 mm/month (8.4 mm/year) especially during wet months and increased discharge in dry months.
Keyword: SWAT model., run off, landuse, discharge

Judul: Alih Ragam Hujan Menjadi Debit di Sub DAS Ciliwung Hulu
Abstrak: Rainfall-discharge transformation in a watershed is an indicator that shows the capability of watershed to control water yield and flood. During 2007-2012, in the region of Jakarta and Bogor show that the rainfall transformation into runoff in Ciliwung watershed including upper watershed in Ciliwung remains high. Knowledge about rainfall transformation in Ciliwung upper watershed are needed. Hydrological models are possible to estimate that rainfall transformation. One of the models that currently often be used is SWAT (Soil Water Assessment Tools) model. The prediction of discharge with SWAT model in Ciliwung upper watershed has satisfying result with coefficient of determination (R2) 0.53 and NSE 0.73. Landuse changes from 2009 to 2012 has decreased the coefficient of measured runoff from 0.76 into 0.22 and based on the estimated runoff has decreased from 0.9 into 0.7. Based on the best scenario of the landuse changes is to apply soil and water conservation in agricultural land with contoured tillage and improving mixed agriculture with agroforestry system, rainfall – runoff transformation runoff decreased from 1763 mm/year into 1565.2 mm/year and the discharge decrease from 4367.0 mm/year into 4350.9 mm/year.
Keyword: SWAT model, rainfall, landuse, discharge

Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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