Judul: Aplikasi Model Tangki dan Pendugaan Erosi dengan Metode Musle Berbasis Data Spas di Sub Das Sibarasok Gadang Kabupaten Padang Pariaman
Abstrak: Distribusi aliran di suatu DAS merupakan proses dinamis yang dipengaruhi oleh iklim, presipitasi, dan kombinasi dari tutupan lahan, evapotranspirasi, jenis tanah, dan topografi DAS tersebut. Proses biofisik hidrologis DAS tersebut merupakan proses alami sebagai bagian dari suatu siklus hidrologi. Perubahan kondisi hidrologi daerah aliran sungai dapat mengakibatkan terjadinya bencana seperti banjir dan tanah longsor. Aplikasi model tangki merupakan suatu model hidrologi yang digunakan untuk menduga karakteristik aliran sungai dengan menggunakan data yang diperoleh dari Stasiun Pengamat Arus Sungai. Penelitian dilaksanakan di Sub DAS Sibarasok Gadang Kecamatan IV Koto Aur Malintang, Kabupaten Padang Pariaman, Propinsi Sumatera Barat. Pengolahan data dilakukan di Laboratorium Hidrologi Hutan dan DAS, Departemen Manajemen Hutan, Fakultas Kehutanan, Institut Pertanian Bogor. Penelitian ini bertujuan: 1) Mengkaji distribusi aliran air secara horizontal dan vertikal menggunakan model tangki, 2) Mengkaji laju sedimentasi dengan metode MUSLE di Sub DAS Sibarasok Gadang. Tahapan penelitian meliputi analisis hubungan debit aliran sungai dengan tinggi muka air, pengolahan data curah hujan, debit aliran sungai, dan evapotranspirasi harian, dan analisis laju sedimen dan erosi.
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Judul: Aplikasi Model Tangki dan Pendugaan Erosi dengan Metode MUSLE Berbasis Data SPAS di Sub DAS Sibarasok Gadang Kabupaten Padang Pariaman
Abstrak: Flow distribution in a watershed is a dynamic process and very dependent on climate, precipitation and combination of land coverage, evapotranspiration rate, soil type and topography of the watershed. Hydrologic biophysic process in a watershed is a natural process as a part of the hydrologic cycle. Change of watershed hydrological condition can result disaster such as floods and landslides. Application tank model is a hydrological model that used to predict river flow characteristic by using data from the SPAS. The research located at Sibarasok Gadang Sub watershed, IV Koto Aur Malintang Sub-District, Padang Pariaman District, West Sumatra. Data was processed at the Laboratory of Forest Hydrology and Watershed, Department of Forest Management, Faculty of Forestry, Bogor Agricultural University. This study aims to examine the distribution of water flow horizontally and vertically using a Tank Model and examine rate of sedimentation in the Sub-watershed Sibarasok Gadang used MUSLE method. Stages of research include analysis of the relationship river flow and water level, processing of rainfall data, river flow, and daily evapotranspiration, and analysis of sediment and erosion rate. Total rainfall during the research is 1,575.6 mm. The results equation between Water Level and Discharge in SPAS Sibarasok Gadang was Q = 7.724 TMA 1,585 with R² = 0.968, correlation between discharge and sediment rate was Qs = 0.525 Q , with R2 = 0.971. Correlation between sediment rate observation and sediment rate MUSLE model showed a high correlation with regression equation was QsMUSLE = 4,287 QsObservasi + 0,005 with R2 = 0.788. This proves MUSLE models can be used to predict the sediment rate reasonably well. Tank Model optimization results obtained parameter values R2 = 0,816. Total flow horizontally into the river dominated by base flow of 679.861 mm with a percentage of 73.10%, followed by the intermediate flow of 16.08%, 7.21% of surface flow and sub-base flow with the smallest percentage of 3.61%. It means the capacity of infiltration is high. Water level shows the flow vertically with the highest water level in tank D (base flow) of 1378.095 mm, followed by tank B intermediate flow (47.979 mm), C sub-base tank flow (18.097 mm), tank A surfaceflow (1.456 mm). This situation shows the condition of the Sibarasok Gadang Sub Watershed is still good.
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Judul: Onset, Durasi, dan Gejala Klinis Anestesi pada Kelinci New Zealand White (Oryctolagus cuniculus) dengan Kombinasi Ketamin-Xylazin Intramuskular
Abstrak: The aim of this research was to expound the onset, duration, and clinical signs observed on anaesthesia phase using ketamine-xylazine combination in New Zealand White rabbits. Fifteen New Zealand White rabbits (Oryctolagus cuniculus) were randomly subjected into three groups of five animals each. Those in group A were anaesthetized using a combination of 35 mg/kg ketamine and 5 mg/kg xylazine given i/m. Group B animals were anaesthetized using a combination of 40 mg/kg ketamine and 5 mg/kg xylazine while group C were anaesthetized using a combination of 45 mg/kg ketamine and 5 mg/kg xylazine, both given i/m. The result of this study indicated that the onset of anaesthesia marked by loss of pain response differ not significantly among the three groups (P < 0.05). Duration of anaesthesia and recovery significantly differ (P < 0.05) as the dose of ketamine increased. The onset of anaesthesia clinical signs within induction phase showed significant differences on sternal recumbency, lateral recumbency, and constricted pupil. Meanwhile the onset of anaesthesia clinical signs showed no significant differences (P<0.05) within recovery phase. It was concluded that onset of anaesthesia and clinical signs in induction phase were directly proportional as the ketamine’s dose increased. Meanwhile duration of anaesthesia and duration of recovery were inversely proportional with the dose increasing.
Keyword: anesthesia, ketamine-xylazine, New Zealand White, rabbit