Judul: Pendugaan Debit Puncak Menggunakan Model Rasional dan SCSCN (Soil Conservation Service-Curve Number); Studi Kasus di Sub-sub DAS Keyang, Slahung, dan Tempuran; Sub DAS Kali Madiun, DAS Solo
Abstrak: Flooding can occur as a result of an increase in the amount and velocity of run-off exceeds the capacity of drainage channels. In addition, floods can occur as a result when drainage channel capacity is reduced, so the amount and velocity of run-off exceeds the capacity whendrainage channels. The decreasing of dranaige channel capacity can occur because of the superficiality of the river due to sedimentation from erosion in the upstream, blockage by garbage or constriction by the accumulation in water bodies. The increasing of amount and velocity of run-off caused by extreme rainfall and changes in land us that causes land clearing and soil compaction. The amount and velocity of run-off that causes the maximum peak discharge (Qp) is important to be known, because it has potential to cause flooding. Peak discharge as important information fordesign of flood control is generally estimated by using the rational model and model of Soil Conervation Service-Curve Number (SCS-CN). To know the validity of both models by using available data in Sub-sub Watershed of Keyang, Slahung and Tampuran (KST), the models are tested by comparing the esimated and obsered Qp. Estimated Qp by using rational model with the peak discharge data in 2009 (39.10 mm precipitation) is 30.82% greater than observed Qp, while the result by using SCS-CN model is 113.87% greater. Estimted Qp by using rational model with maximum rainfall data in 2009 (45.97 mm) is 4,074.74% greater than observed Qp, while the result by using SCS-CN model is 18.06% smaller than observed Qp. The coefficient run-off that calculated by using the rational model is greater (0.375) than calculation by direct observational data (0.34).
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Judul: Analisis Debit Aliran Sungai Menggunakan Model SWAT di Sub DAS Ciasem Kabupaten Subang Jawa Barat
Abstrak: Increasing developed area and decreasing forest area lead to increase runoff coefficient that further to increase the stream discharge during rainy season and draught in dry season. The hydrological model can be applied to understand that phenomena. One of them is SWAT model. Application SWAT model in this research is focused only in rainfall transformation into discharge. Research is conducted in Ciasem Sub Watershed. The aim of this research is to know the dinamics of land use change and stream discharge in Ciasem Sub Watershed, also to know the effectiveness of SWAT Model for analyzing stream discharge by using available data in Ciasem Sub Watershed. The change of land use at 2003, 2006, and 2009 particularly happened on paddy field which was changed into a mixed agricultural dryland area of about 3253,8 ha, decreased runoff coefficient. Discharge estimation using SWAT model with measured rainfall at Curugagung Rain Station as input did not fit succesfully to measured discharge at Ciasem Sub Watershed outlet. Discharge estimation using SWAT model with simulated rainfall as input results better fitting to measured discharge at Ciasem Sub Watershed outlet with the value of R² > 0,51 and NS > 0,74. The result of the simulation showed that land use change of paddy filed to mixed agricultural dryland decreased runoff coefficient from 0,21 to 0,12 and also monthly maximum runoff discharge from 117,55 m3/s to 79,68 m3/s.
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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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