Judul: Analisis Spasial dan Temporal Kebutuhan Air Irigasi DAS Pusur Kabupaten Klaten
Abstrak: Klaten is one of rice production centers in Central Java Province with irrigated rice paddies covering an area of 18689.44 ha, representing 0.03% of irrigated rice fields in central Java. The availability of water greatly affects the productivity of the rice plant. Pusur irrigation area is one of the irrigation area often have deficiency of irrigation water in the dry season. The purpose of this research is to identify the characteristics of the irrigated area, irrigation water needs, analyzing and compiling a map of irrigation water balance DAS Pusur. Based on analysis that has been done to the data from 2009-2011, the second planting season which happen in the dry season is a planting season that has most small irrigation fulfillment, while the first and the third planting season have a relatively equal value and higher compared to the second growing season. Based on analysis using discharge data from the Agency of Public Works Klaten. Plosowareng have the highest percentage of irrigation needs, that was 92.41%, while Jetak have the lowest percentage of irrigation needs, that was 57.93%. In fact, Jetak got irrigation water runoff from higher areas so that the percentage of fulfillment of irrigation is higher when compared with the results of analysis by using a discharge data from the Public Works Agency.
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Judul: Identifikasi dan Analisis Tata Guna Lahan dan Kecukupan Air Irigasi di Dua Desa Lingkar Kampus IPB (Desa Cibanteng dan Desa Benteng)
Abstrak: Water is one of the important factors in agriculture cultivation process. Irrigation planning was very important to guarantee water availability especially for paddy field. Water deficiency influenced paddy development and could reduced its productivity. To fulfill plant water requirement, irrigation must be given in right time and quality. The objectives of this research are to identify and analyse land use, irrigation requirements, and irrigation sufficiency in two villages. The result showed that land use in Cibanteng village and Benteng villages were used for settlement, farming and plantation area. Analysing by Map Info software, showed that settlement and farming area in both villages are increased, but the plantation area is decreased. The irrigation water requirement was calculated by Cropwat software and the result for Cibanteng village in second plant time is 1.47 lt/s and for Benteng village is 0.416 lt/s. The irrigation water sufficiency in Cibanteng village is 26.64 lt/s and in Benteng village is 30.42 lt/s. From that irrigation water sufficiency, the farming area in both villages can planted with paddy twice in a year and once planted with dry crop.
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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