Judul: Design of Rainwater Harvesting System from Building Roof at Putra Dormitory Building C3 IPB Dramaga Campus
Abstrak: Bogor sebagai kota hujan memiliki curah hujan yang tinggi dalam satu tahun mencapai 4000-4500 mm/tahun. Belum tersedianya talang air dan penampungan air hujan pada gedung asrama C3 menyebabkan minimnya pemanfaatan air hujan di lokasi penelitian. Analisis curah hujan rencana menggunakan metode Gumbel dengan periode ulang 2 tahun yang disesuaikan dengan kondisi tipologi kota dengan nilai 124,34 mm/hari. Volume suplai air hujan yang jatuh ke seluruh atap gedung asrama putra C3 sebesar 4060,28 m3 . Sedangkan volume air hujan yang jatuh disetiap jalur aliran yaitu 1565 m3 , 1675 m3 , dan 802,2 m3 . Perancangan sistem pemanenan air hujan terdiri dari talang air, saringan kawat, first flush diverter, pipa inlet, saluran pembuangan, dan reservoir. Waktu pengisian air dari atap bangunan ke reservoir tandon air pada jalur aliran 1 selama 23 menit, jalur aliran 2 selama 32 menit, dan jalur aliran 3 selama 29 menit.
Keyword: Rainfall, Discharge, Intensity, Harvesting, Reservoir

Judul: Rainwater Harvesting System Design in International  Dormitory of IPB Dramaga Campus
Abstrak: Curah hujan yang tinggi di Bogor mencapai 3500 mm melebihi rata-rata curah hujan nasional antara 2000 – 3000 mm. Pemanenan air hujan cocok untuk dilakukan sebagai langkah konservatif yang dapat dilakukan IPB University dalam upaya pemeliharaan sumber daya air yang berkelanjutan. Penelitian ini bertujuan mengetahui banyaknya suplai air hujan yang dapat dipanen, menghasilkan desain sistem PAH serta RAB instalasinya, dan mengetahui penghematan air serta biaya yang dapat dicapai melalui sistem PAH. Penelitian dilakukan dari Februari – Mei 2024 dengan pengambilan data primer berupa luas atap bangunan dan informasi kebutuhan air bersih, serta data sekunder berupa curah hujan tahun 2000 – 2023 Stasiun BMKG Jawa Barat. Potensi volume air hujan yang dapat dipanen 1230 – 2134 m3 dengan rata-rata suplai 1603 m3 per tahun. Desain sistem pemanenan PAH yang dirancang menggunakan tangki FRP berkapasitas 28 m3 dengan dimensi 7 m x 2 m x 2 m. Talang dipasang dengan kemiringan seragam ½% dan pipa datar dengan kemiringan seragam 1%. Variasi ukuran pipa dan talang yang digunakan antara 1 – 10 inch. Besarnya biaya yang dibutuhkan untuk instalasi PAH sebesar Rp143.000.000,00. Penghematan air aktual yang dapat tercapai melalui sistem PAH sebanyak 44% – 75% dari kebutuhan air tahunan dan menghemat biaya lebih dari 120% dari investasi awal., High rainfall in Bogor reached 3500 mm, exceeding the national average rainfall between 2000 – 3000 mm. Rainwater harvesting is conservative step that IPB University can take to maintain sustainable water resources. This research aims to determine amount of rainwater supply that can be harvested, created PAH system design and installation RAB, and determine water and cost savings that can be achieved through PAH system. The research was conducted from February – May 2024 by collecting primary data of building roof area and information of clean water needs, and secondary data of rainfall from 2000 – 2023 from West Java BMKG Station. Potential harvested volume of rainwater is 1230 – 2134 m3 with average supply 1603 m3 a year. The harvesting system design uses a 28 m3 FRP tank with dimensions 7 m x 2 m x 2 m. The gutter is installed with slope of ½% and the flat pipe with slope of 1%. Variations in pipe and gutter sizes used are between 1 – 10 inches. The cost required for PAH installation is IDR143,000,000.00. Actual water savings that can be achieved through PAH system are 44% – 75% of annual water needs and cost savings of more than 120% of the initial investment.
Keyword: air hujan, ketersediaan air, konservasi air, pemanenan air hujan, rainwater, rainwater harvesting, water availability, water conservation

Judul: Mitochondrial DNA Gene Organization and Phylogenetic Relationship of Naja siamensis
Abstrak: Naja siamensis is one of Asiatic cobra in the Family of Elapidae, known as a cryptic snake. It has many morphological variations that lead to misidentification. Misidentification can cause the wrong concept in developing antivenom types due to high snakebite cases occur in Thailand. Thus, an accurate species identification using a molecular approach is crucially required. Mitochondrial DNA has been used widely in snake molecular studies. These studies were aimed to determine the arrangement of the N. siamensis partial mitochondrial genes using reptile-oriented primers and to reveal the phylogenetic relationship among other species of Asian cobra. DNA extraction was carried out based on the standard DNA salting-out protocol and was conducted by bioinformatics analysis using BLASTn and MEGA 6 software. Gene annotation was performed against N. kaouthia complete genome. A total of 3121 bp of N. siamensis mtDNA genes were sequenced consisting of partial of six regions: 16S rRNA, ND1, tRNA-Ile, CRII region, tRNA-Leu, tRNA-Gln, and COI genes. The mtDNA gene organization of N. siamensis was predicted to has a similar pattern with the common Elapidae mtDNA gene organization. This study showed that there is a monophyletic form in Naja genus and N. kaouthia is the closest species with N. siamensis based on partial 16S rRNA and ND1 gene.
Keyword: 16S rRNA, Elapidae, ND1, phylogenetic relationship