Judul: Perencanaan Bangunan Pelimpah pada Embung di Perkebunan Bungamayang PT. Perkebunan Nusantara VII
Abstrak: Pabrik Gula Bungamayang, PT. Perkebunan Nusantara VII is one of the sugar cane plantations that the fulfillment of water use reservoir. There’s problem at Petak 093 Afdeling in Rayon II, where the rain caused reservoir water runoff towards to the inspection so that the path becomes difficult pass. As for the goal of this research is planning a spillway of reservoir design so that the normal storage of reservoir constants. Generally, this research was divided into two steps there were preliminary research (flood discharge analysis) and primary research include the analysis of spillway and open channel. Based on observed and researched at Petak 093 Afdeling 09 Rayon II was gained the 25 years return period of flood discharge is 2.96 m3/s by means of used a double circular culvert each 0.80 m of diameter with a space of 0.40 m. Then the flow of water that pass through the culvert continued toward to the 1.85 m of open channel and 4.70 × 2.00 m of basin.
Keyword: circular culvert, small dam, flood discharge, spillway

Judul: Perencanaan Bendungan Tipe Urugan di Perkebunan Cinta Manis, PT. Perkebunan Nusantara VII, Palembang
Abstrak: Perluasan lahan untuk menambah produktivitas tebu di PT. Perkebunan Nusantara VII mengharuskan pembangunan bendungan sebagai suplai air irigasi. Tujuan penelitian ini adalah pembangunan bendungan yang sesuai dengan RSNI T-01-2002. Analisis hidrologi dimulai dengan menentukan luas DAS, perhitungan curah hujan rencana, debit banjir rencana, kebutuhan air, debit andalan dan perhitungan neraca air. Analisis topografi dimulai dari perhitungan volume tampungan, hubungan antara elevasi, luas dan volume genangan. Penelusuran banjir dilakukan untuk mengetahui MAB untuk menghitung dimensi bendungan. Dimensi bendungan dihitung berdasarkan tinggi jagaan dan lebar mercu bendung, kemudian dilakukan analisis stabilitas bendungan. Berdasarkan hasil perhitungan diketahui total volume tampungan sebesar 92650.96 m3. Tinggi bendungan 3.5 m, lebar mercu 6 m dan lebar bawah tubuh bendungan adalah 23.34 m. Hasil analisis stabilitas aliran filtrasi menunjukkan bahwa terdapat garis depresi aliran yang keluar melalui lereng hilir bendungan sehingga diperlukan drainase kaki. Hasil analisis lereng menunjukkan bahwa angka aman (Fs) untuk longsor lebih besar dari syarat yang ditetapkan sehingga bendungan aman dari bahaya longsor.
Keyword: bendungan, debit, volume, dimensi, stabilitas

Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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