Judul: Pendugaan Aliran Permukaan Berdasarkan Karakteristik Daerah Aliran Sungai Walanae, Sulawesi Selatan
Abstrak: Influence of hydrological response of surface runoff which occurred in Walanae Watershed can be known through large or small values of rainfall along river basin and the biophysical characteristics of river basin. When rainfall is small or moderate, surface runoff only occurred in region that impermeable and saturated in a river flow area / or direct falls on surface of the water. Morphometric observed in the riverbank of Walanae is the pattern river network, river order, flow drainage density, the ratio of river branching, and slope degree. Conditions of Walanae basin can be represented by calculating the coefficient of riverflow regim, which is the ratio between maximum and minimum discharges. The value of the river regim coefficients that obtained for each year respectively are; 2007 = 229; 2008 = 276; 2009 = 245; and 2010 = 340. These values indicate that the river basin Walanae has experienced degradation or malfunction of upstream watersheds, because the value of the coefficient of regim river >120 and tend to increase each year. Estimation analysis of watershed surface runoff of Walanae using method of Soil Conservation Service (SCS), is obtained by calculating the curve number of the river basin. Based on the analysis results, surface runoff capability of watershed Walanae in 2010 is higher (154.29 m3/s) than in 2005 (13.32 m3/s). This large runoff values is caused by current curve number of this large watershed. Larger value of curve number resulting larger value of surface runoff.
Keyword: SCS method, surface runoff, morphometric, curve number

Judul: Analysis of Surface Runoff in Citarum Watershed
Abstrak: Beberapa DAS di Indonesia telah mengalami kerusakan, salah satunya adalah DAS Citarum. Kerusakan yang terjadi pada DAS menunjukkan masih lemahnya sistem pengelolaan yang ada. Sistem pengelolaan DAS yang lemah terjadi karena kurang terdeteksinya kerusakan DAS secara dini dan periodik. Kerusakan DAS dapat diidentifikasi menggunakan pemodelan hidrologi, antara lain dengan analisis aliran permukaan (surface run off) menggunakan metode Soil Conservation Service berbasis curve number (SCS-CN). Penelitian ini bertujuan untuk menentukan dan memetakan nilai CN dan aliran permukaan di DAS Citarum. Nilai aliran permukaan diprediksi dengan model SCS berdasarkan nilai CN setiap unit lahan. Data yang digunakan pada penelitian ini yaitu data tekstur tanah, curah hujan dan jenis tutupan lahan untuk menentukan nilai CN. Nilai CN diolah untuk menentukan nilai aliran permukaan. Nilai CN yang tinggi berpotensi menghasilkan aliran permukaan yang tinggi. Selanjutnya, nilai aliran permukaan dipetakan pada seluruh wilayah DAS Citarum. Hasil penelitian menunjukkan nilai CN tertinggi terdapat pada satuan lahan terbangun dan terendah terdapat pada satuan lahan bervegetasi. Nilai aliran permukaan tertinggi terdapat pada subDAS Cigundul sebesar 731 mm/tahun dan terendah di subDAS Citarum Hulu sebesar 356,22 mm/tahun. Curah hujan yang menjadi aliran permukaan tertinggi sebesar 34% terjadi di subDAS Citarum Hilir dan terendah sebesar 20% terjadi di subDAS Citarum Hulu., Several watersheds in Indonesia have been degraded, one of which is the Citarum watershed. The degradation of the watershed indicates that the existing management system is still weak. Poor watershed management system occurs due to lack of early and regular detection of watersheds degradation. Watershed degradation can be identified using hydrological modeling, including the analysis of surface runoff using the curve number-based on Soil Conservation Service (SCS-CN) method. This study aims to determine and mapping the value of CN and surface runoff in the Citarum watershed. The surface runoff value was predicted using the SCS model based on the CN value of each land unit. The data used in this study are data on soil texture, rainfall, and land cover types to determine the CN value. The CN value is processed to determine the surface runoff value. High CN values have the potential to produce high surface runoff. Furthermore, the surface runoff value was mapped over the entire Citarum watershed area. The results show that the highest CN value is found in the built- up area and the lowest is in the vegetated area. The highest surface runoff value are found in the Cigundul sub-watershed at 731 mm/year while the lowest in the Citarum Hulu sub-watershed at 356.22 mm/year. The highest percentage of rainfall that became surface runoff was occured in the Citarum Hilir sub- watershed (34%) and the lowest is in the Citarum Hulu sub-watershed (20%).
Keyword: curve number, runoff mapping, SCS-CN

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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