Judul: Aspek Hidrologi dalam Klasifikasi Tipe Luapan Pasang Surut, Studi Kasus Daerah Telang Sumatera Selatan, Hydrological aspect of tidal flood classification, case study in Telang South Sumatera
Abstrak: Availability of water in sufficient amount in tidal land management is important for agriculture. The tidal flood as hydrological aspect has a significant role in tidal water management. The objective of this research is to find out better tidal flood classification method. A model to predict water level using hydrological aspects including the tide was tested in Telang South Sumatera.
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Judul: Modeling of Flood for Land Use Management (Case Study of Ciliwung Watershed)
Abstrak: Floods are one of the major disasters affecting many countries in the world year after year. It is an inevitable natural phenomenon occurring from time to time in all rivers and natural drainage systems. It causes damage to lives, natural resources and environment as well as the loss of economy and health. Floods represent complex problems because of its variety. Therefore, this variety cannot be studied or controlled only by one or two specific methods. The objectives of this research are to understand the process of flood events and its interaction with hydrometeorological components, to develop flood model for watershed management and to determine the effect of land use change to watershed discharge which indicates flood event. The research consists of four processes those are 1) Data Preparation, 2) Model Development, 3) Model Simulation and 4) Model Calibration and Validation. Data preparation was conducted for two kinds of data namely spatial data and tabular data. Model developed as numerical model of the hydrology of a river basin system. This model includes the response of watershed to precipitation, the actions of the river network as water flows through the river, the effect of land use changes, and the effect of engineering structures to the watershed. Model simulated by change land use as an input. Model calibrated by using water level data of field measurement in year 1996 and model validated by using water level data of field measurement in year 2000. The result of this reseach showed how the process based modeling is useful to model hidrological processes over the watershed. Precipitation is the main input for hidrology simulation and land use change gives the effect of water level in the watershed. The model which is built in this research can be used to evaluate runoff from different land use areas. For assessing the hydrological effects of land use changes on floods, three hypothetical scenarios, namely urbanization, deforestation and afforestation scenario, were considered made. It was found from the model simulation that the urbanization scenario has the higest negative impact on increasing water level. Deforestation has the second largest negative impact, while afforestation causes positive impact shown by decreasing water level. The result indicated that the urbanization produce the highest peak flow, followed by the deforestation and afforestation scenario. The simulated water level for the present land use is 84 cm, for the urbanization scenario 135 cm, deforestation scenario 92 cm, and afforestation scenario 59 cm. Accordingly, the urbanization scenario increases the peak discharge by 61%, the deforestation scenario increase 15%, and afforestation decrease by 19%.
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Judul: Respon Antibodi pada Ayam Broiler yang Divaksinasi Vaksin Rekombinan Infectious Bursal Disease (IBD).
Abstrak: Penelitian ini dilakukan untuk mengevaluasi durasi antibodi asal induk terhadap Avian Influenza (AI) dan mengevaluasi respon antibodi Infectious Bursal Disease (IBD) pada ayam broiler yang divaksinasi dengan vaksin IBD rekombinan. Penelitian ini meggunakan dua kelompok ayam broiler: kelompok divaksinasi dan kelompok kontrol. Kelompok yang divaksinasi menerima vaksinasi herpesvirus of turkey (HVT)-IBD pada usia satu hari dan kelompok kontrol tidak divaksinasi apapun. Sampel serum diambil pada hari ke 3, 6, 9, 12, 15, 19, 22, 26, 29, dan 33. Keberadaan antibodi AI ditentukan dengan uji inhibisi hemaglutinasi (HI), sedangkan keberadaan antibodi IBD ditentukan dengan enzyme linked immunosorbent assay (ELISA). Antibodi AI asal induk pada kedua kelompok terdeteksi dari hari ke 3 hingga hari ke 29, tetapi titer antibodi berada di bawah level protektif 24. Antibodi IBD pada kelompok kontrol, positif dari hari ketiga hingga 33, tetapi rataan titer antibodi turun pada level terendah pada usia 15 hari. Titer antibodi IBD pada kelompok yang divaksinasi positif sampai usia 33 hari. Penelitian ini menunjukkan bahwa keberadaan antibodi AI asal induk tidak dipengaruhi oleh vaksinasi HVT-IBD, dan keberadaan antibodi IBD asal induk tidak memengaruhi keberhasilan vaksinasi HVT-IBD.
Keyword: antibodi, ayam broiler, Avian Influenza, Infectious Bursal Disease, HVT-IBD