Judul: Efektivitas Pembangunan Sumur Resapan dalam Pengendalian Limpasan di Kelurahan Pinang Ranti dan Bendungan Hilir Jakarta
Abstrak: Jakarta City development has caused in the decline of open green space quantity. It impacts to decreasing soil infiltration capacity, increasing surface runoff and flood potential. The construction of Sumur Resapan aims to reduce flood potential and improve ground water reserves in Jakarta. RunOff estimation method using SCS-CN obtained value of 1,68 m3 in 77m2 of water catchment area in Pinang Ranti and 2,08m3 in 95m2 of water catchment area in Bendungan Hilir. The average rate of infiltration are 41,34 cm/jam and capable to infiltrate water by 3,33 m3 in Pinang Ranti. The average rate of infiltration are 10,34 cm/jam and capable to infiltrate water by 1,61 m3 in Bendungan Hilir. By the infiltration rate, it can be concluded that Sumur Resapan will not be full or overflowing.The constructon of sumur resapan can reduce runoff and increase soil water reserves so it is able to meet water needs of society, particularly in society who doesn’t affordable yet by PDAM.
Keyword: recharging well, infiltration

Judul: Perencanaan Sumur Resapan di Kawasan Pemukiman Perkotaan
Abstrak: Pertumbuhan penduduk yang pesat di Kota Bogor menyebabkan tata guna lahan banyak yang berubah menjadi lahan terbangun, sehingga meningkatkan limpasan dan mengurangi pengisian air tanah. Penelitian ini bertujuan merencanakan sumur resapan berbasis daya dukung sumber daya air di kawasan pemukiman daerah perkotaan. Telah dapat dilakukan penapisan lokasi prioritas sumur resapan berdasarkan kriteria topografi, tutupan lahan, dan aliran sungai. Lokasi prioritas tersebut yaitu di Kecamatan Bogor Selatan dengan DTA Cikaret, Cipakancilan, Cipinang Gading, dan Cisadane. Status DDL-air keempat DTA termasuk kategori “terlampaui” (overshoot). Hasil analisis neraca air menunjukkan surplus neraca air sebesar 1.272,3 mm/tahun dengan persentase limpasan yang relatif besar yaitu 75,7%-95%. Debit limpasan maksimum berkisar antara 31,3 m3/detik s/d 163,7 m3/detik. Telah dapat didesain sumur resapan individu dengan tiga tipe menurut luas atapnya, dengan kedalaman yang seragam 3 m, dan jari - jari 0,4 m-0,6 m. Dengan menggunakan skenario luas atap per pemukiman 10%-40% efektivitas sumur resapan individu diperkirakan berkisar antara 5,4%-39,9%. Total sumur yang diperlukan untuk empat DTA sejumlah 1.450 unit-43.073 unit. Sumur resapan komunal direncanakan terintegrasi dengan saluran drainase jalan lokal, kolektor, dan arteri. Perlu dilakukan penelitian lebih lanjut untuk mengkaji kelayakan dan akseptabilitas masyarakat terhadap pembangunan sumur resapan., The rapid growth in Bogor City has caused a lot of land use to be turned into built-up land, thereby increasing runoff and reducing groundwater recharge. This study aims to plan infiltration wells based on the carrying capacity of water resources (DDL-water) in urban residential areas. It have been done to filter the priority location of infiltration wells based on topography, land cover, and river flow criteria. The priority location are in South Bogor District with Cikaret, Cipakancilan, Cipinang Gading, and Cisadane catchment areas. The DDL-water status of the four catchment areas is in the “overshoot” category. Water balance analysis show an air balance surplus of 1.272,3 mm/year with a relatively large proportion of runoff, which is 75,7%-95%. The maximum runoff discharge ranges from 31,3 m3/s to 163,7 m3/s. It have been done to design individual infiltration wells with three types according to the roof area, with a uniform depth of 3 m, and a radius of 0,4 m-0,6 m. By using the scenario of roof area per settlement 10%-40%, the effectiveness of individual infiltration wells ranges from 5,4%-39,9%. The total wells required for the four catchment areas are 1.450 units-43.073 units. Communal infiltration wells are planned to be integrated with local, collectors, and arteries street drainage channels. Further study is needed to asses the feasibility and acceptability from society of the infiltration well development.
Keyword: DTA, limpasan, sumur resapan, Catchment areas, infiltration well, runoff

Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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