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: Neraca air tanaman untuk perencanaan irigasi lahan sawah (studi kasus : daerah irigasi Kapilaler dan Taman, kabupaten Klaten - provinsi Jawa Tengah)
Abstrak: Secara ekologi maupun fisiologi, air telah menentukan penyebaran pertumbuhan dan perkembangan tanaman. Ketersediaan sumber daya air sangat dipengaruhi oleh kondisi iklim, topografi, jenis tanah, tutupan lahan, serta sruktur geologi suatu daerah. Kabupaten Klaten merupakan salah satu wilayah dengan sebaran sawah yang luas serta potensi sumber daya air yang cukup besar. Keadaan ini sehanrusnya mengindikasikan tingginya produksi pertanian Kabupaten Klaten. Akan tetapi, daerah ini sering mengalami krisis air. Krisis air yang terjadi berakibat pada penurunan produksi pertanian. Selain itu, terbatasnya data dan informasi potensi sumber daya air juga mempengaruhi perencanaan dan pengelolaan air. Operasionalisasi irigasi pun terganggu akibat data neraca pasokan-kebutuhan air yang terbatas. Guna memperbaiki perencanaan dan pengelolaan sumber daya air maka dilakukan identifikasi potensi sumber daya air dan analisis neraca kebutuhan pasokan-irigasi. Kebutuhan air tanaman diduga dengan menggunakan model Water and Agroclintate Resources Management (WARM) dan pasokan irigasi digambarkan oleh data debit bendung. Gambaran kondisi defisit dan surplus pasokan irigasi menentukan skenario pola tanam rekomendasi. Pada kondisi tanpa irigasi, masa tanam dengan input curah hujan, ratarata hanya untuk satu kali musim tanam padi dalam satu tahun. Penambahan musim tanam hingga 3 kali tanam/tahun dapat dilakukan dengan tambahan irigasi. Besarnya rambahan irigasi rawa (1998-2003) untuk 211 ha lahan sawah di Di Taman dan 355 ha DI Kanilaler adalah 0.4 lt/detik untuk setiap hektarnya. Oleh karena itu, kekurangan air dapat diminimalkan dengan pola tanam rekomendasi padi-padi-jagung di DI Kapilaler dan Taman.
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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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