Judul: Pendugaan Debit Aliran Sungai Ciliwung Di Bendung Katulampa Menggunakan Software ArcSWAT
Abstrak: Ciliwung upstream watershed region has functions as a protector area and also buffer area of the watershed. At present there are many land function changing on the Ciliwung watershed that effecting the river overflow easly until flooding in the downstream. River discharge assessment become important to do in order to prevent flooding. ArcSWAT software is a tool which used in this discharge assessment. ArcSWAT software have 4 processes to do, that are watershed delineation, shaping of Hydrological Response Unit (HRU), shaping of climate data, and also simulation process. Simulation yield for the upperstream of Ciliwung watershed has shaped 27 sub-basin and also 491 kind of HRU. This research utilize SWAT Editor as the application for the calibration. Base on simulation yield calibrated, maximum monthly discharge has been obtained as big as 59.42 m3/sec, minimum discharge as big as 2.02 m3/sec, and also average discharge as big as 14.61 m3/sec. Coefficient determination value of R2 and NS value are 0.831 and 0.599. For this result the simulation yield of ArcSWAT for Ciliwung upperstream watershed is valid with the good category result.
Keyword: Bogor Agricultural University (IPB), NS and R2 values, simulation, ArcSWAT, discharge, Upstream Ciliwung watershed

Judul: Simulasi Debit Puncak dan Distribusi Aliran Sungai Ciliwung Hulu
Abstrak: Daily discharge data of Ciliwung Watershed have been measured based on water level on Water Level Stations of Katulampa. Discharge of Ciliwung Watershed is contributed by its sub-watershed discharge. Discharge data of each sub-watersheds are not recorded, therefore sub-watershed discharge needs to simulate. The aim of this study is to simulate contribution of each sub-watershed discharge of Upper Ciliwung Watershed. The peak discharge was estimated using HEC-WMS v.8.1 with Soil Conservation Service - Curve Number (SCS-CN) method. The result showed that the simulated peak discharges has a good correlation with observed peak discharges, with the value of R2 is 0,701. RMSE is 15,55 with the lowest peak discharge is 8,23 m3/s and highest is 102,26 m3/s. The Upper Ciliwung Watershed is divided into six sub-watersheds, which are Tugu (4897 ha), Ciesek (2564 ha), Cisarua (2293 ha), Cisukabirus (1729 ha), Cibogo (1285 ha), and Ciseuseupan (1207 ha). CN of sub-watersheds are 74,0 for Ciesek, 72,5 (Tugu), 71,0 (Cisukabirus), 70,7 (Cibogo), 69,3 (Cisarua), and 67,9 (Ciseuseupan). The result showed that Tugu sub-watershed contributed the highest discharge (39%), then followed by 29% (Ciesek), 11% (Cisukabirus), 9% (Cisarua), 7% (Cibogo), and 3% (Ciseuseupan).
Keyword: Bogor Agricultural University (IPB), SCS-CN, HEC-WMS v.8.1, peak discharge, direct runoff, stream flow

Judul: The effect on niacin supplementation on production and egg cholesterol of hysex brown laying hens
Abstrak: Telur merupakan salah satu bahan makanan asal ternak unggas yang kaya akan gizi, seperti karbohidrat, protein, lemak, vitamin dan mineral, disamping harganya murah, sehingga disebut wonderful food. Oleh karena itu, tidak mengherankan konsumsi telur di Indonesia cukup tinggi dibandingkan dengan bahan makanan sumber protein hewani lain. Disisi lain, adanya persepsi, bahwa sebutir telur mengandung kolesterol relatif cukup tinggi, yaitu 200 - 250 mg atau 1280 mg per 100 g kuning telur (yolk).
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