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: Peak Discharge Estimation of Upper Ciliwung Watershed
Abstrak: Debit puncak aliran sungai Ciliwung Hulu merupakan informasi yang sangat penting dalam perencanaan struktur pengendali banjir dalam periode ulang tertentu. Namun, Stasiun Pengamat Arus Sungai (SPAS) sebagai sarana pengukur tidak tersedia pada setiap Sub DAS. Tujuan dari penelitian ini adalah mengkaji akurasi Model Rasional untuk memprediksi debit puncak dan melakukan pendugaan debit puncak pada tiap Sub DAS Ciliwung Hulu. Pendugaan debit puncak dilakukan dengan metode Rasional menggunakan distribusi Gumbel dan Log Pearson tipe III. Hasil perhitungan menunjukkan metode Rasional memiliki akurasi pendugaan baik dalam periode ulang T1 hingga T10 tahun yaitu R2 = 0,98; NSE = 0,14 pada distribusi Gumbel dan R2 = 0,99; NSE = 0,86 pada distribusi Log Pearson tipe III. Selanjutnya model Rasional dengan distribusi Log Pearson tipe III dipilih sebagai prediksi debit puncak dalam periode ulang T1 hingga T10, T25, T50 dan T100 tahun pada tujuh Sub DAS Ciliwung Hulu, yaitu Sub DAS Cibalok, Ciesek, Ciliwung Hulu, Cisarua, Ciseuseupan, Cisukabiru, dan Cisuren. Berdasarkan pendugaan dengan metode Rational, nilai debit puncak terendah pada periode ulang 1 tahun terjadi di Sub DAS Ciesek yaitu sebesar 2,04 m3/detik dan tertinggi terjadi di Sub DAS Ciliwung Hulu yaitu sebesar 20,32 m³/detik ., The peak discharge of the Upper Ciliwung River is very important for flood control planning structure in a certain return period. However, The River Flow Observation Station (RFOS) as a measuring tool is not available in every Upper Ciliwung Sub watershed. The objectives of this research are to assess the accuracy of Rational method in estimating the peak discharge and to estimate the peak discharge in each Sub watershed. The peak discharge was estimated using Rational method with Gumbel and Log Pearson type III distribution. The result showed that Rational method has a very good estimation accuracy within return period T1 until T10 which are R2 = 0,98; NSE = 0,14 for Gumbel and R2 = 0,99; NSE = 0,86 for Log Pearson type III. Furthermore, the Rational model with Log Pearson type III distribution is choosen to estimate the peak discharge within return period T1 until T10, T25, T50, and T100 in the seven Upper Ciliwung Watershed, which are Cibalok, Ciesek, Ciliwung Hulu, Cisarua, Ciseuseupan, Cisukabiru, and Cisuren Sub Watershed. Based on the peak discharge estimation using Rational method, the lowest value was within return period 1 year which is 2,04 m3/s in Ciesek Sub Watershed and the highest value was within return periode 100 year which is 97,11 m3/s in Upper Ciliwung Sub Watershed.
Keyword: Gumbel distribution, Log Pearson distribution, peak discharge, Rational method, return period

Judul: Keberadaan Antibodi Asal Induk Newcastle Disease (ND) dan Infectious Bronchitis (IB) pada Broiler yang Divaksinasi Vaksin Rekombinan HVT-IBD
Abstrak: Penelitian ini bertujuan untuk mempelajari keberadaan antibodi asal induk terhadap virus Newcastle Disease (ND) dan Infectious Bronchitis (IB) pada broiler yang divaksinasi dengan vaksin rekombinan Herpesvirus of Turkey (HVT) - Infectious Bursal Disease (IBD). Pada penelitian ini digunakan dua kelompok ayam yaitu: Kelompok Vaksinasi dan Tidak Vaksinasi. Kelompok vaksinasi menerima vaksin rekombinan HVT-IBD pada umur 1 hari. Sampel serum dikoleksi pada umur 3, 6, 9, 12, 15, 19, 22, 26, 29, dan 33 hari. Titer antibodi ND ditentukan dengan uji Hemaglutinasi Inhibisi (HI), sedangkan Enzyme-linked Immunosorbent Assay (ELISA) digunakan untuk menentukan titer antibodi IB. Antibodi ND pada kedua kelompok masih terdeteksi sampai broiler berumur 33 hari, namun titer antibodi ND positif hanya sampai umur 6 hari dan tidak mencapai level protektif. Antibodi IB masih pada level positif sampai dengan umur 6 hari pada kelompok divaksin dan 3 hari pada kelompok tidak divaksin. Hasil penelitian ini mengindikasikan bahwa diperlukan vaksinasi ND pada broiler berumur 3 hari dan vaksinasi IB pada broiler berumur lebih dari 6 hari.
Keyword: Antibodi asal induk, broiler, Infectious, Bronchitis, Newcastle Disease