Judul: Analysis of Bekasi City flood reduction using Bekasi Hulu watershed management
Abstrak: One major river flowing through Bekasi City is Bekasi river. Total extent of the Bekasi Hulu watershed is about 39,045.0 ha. In 2002 with rainfall of 250 mm in 8 hours caused water flood about 138 ha resident area in 2-3 days in Bekasi City, more extremely in 2005 with rainfall only 127 mm for 6 hours caused flooded in 164 ha resident area in 3 days. This evidence showed that flood problem in Bekasi City becomes worse, and seem to be more horrifying in the future. Therefore, the flood problems need an extremely great attention. The objectives of this research were (1) analysis watershed condition; (2) analyze the causes of flood over Bekasi City from the perpective of hydrology and hydraulic; (3) plan of Bekasi Hulu watershed management to reduce flood risk in Bekasi City. To obtain the purposes of this research, the method of analysis are devided into five main subjects i.e: (1) analysis of watershed condition using SCS method; (2) hydrology analysis using hydrology modeling HEC-HMS; (3) analysis of river flow capacity using hydraulic modeling HEC-RAS; (4) analysis of the economic looses in flooded area and (5) developing plan of scenarios to reduce flood risk. There are four scenarios to overcome the flood problems: (1) adopting government plan 2010; (2) managing Bekasi Hulu watershed area with conservation tillage; (3) building water retarded structure entire of watershed and (4) combination of second and third scenarios. The research results show that river flow capacity only 462 m3/s is not enough to flow the discharges. Prediction of land use changing in 2020 show that within 10 years return period, the discharge become 735,63 m3/dt. The economic losses due to direct and indirect losses in flooded area is about 39 billion rupiahs for 10 years return period discharge (620,3 m3/dt). Based on research results, the losses could be reduced by managing Bekasi Hulu watershed area with conservation tillage and build water retarded structure. It will reduce 31.01 % of the discharge to 427.96 m3/s that below to the river flow capacity in 462 m3/s.
Keyword: Land use changing

Judul: Drainage Evaluation of RW 02 Kotabaru Village West Bekasi Using EPA SWMM
Abstrak: Banjir sering kali terjadi di Indonesia, termasuk di Kota Bekasi di Perumahan Harapan Baru 2, Kelurahan Kotabaru, Kecamatan Bekasi Barat, dengan tinggi air mencapai 100 cm. Kejadian ini mengganggu aktivitas warga serta memaksa mereka untuk mengungsi. Evaluasi saluran drainase perlu dilakukan untuk mengidentifikasi penyebab banjir. Metode analisis hidrologi dan pemodelan menggunakan EPA SWMM 5.2 digunakan untuk menemukan titik-titik banjir dan menghitung kapasitas drainase secara akurat. Penelitian ini bertujuan untuk menganalisis penyebab banjir dan memberikan rekomendasi perbaikan. Hasil analisis hidrologi menunjukkan bahwa model distribusi hujan Log Pearson III dengan data satelit GPM, periode ulang 5 tahun, dan curah hujan 267,87 mm. Pemodelan SWMM 5.2 melibatkan 30 subcatchment, 126 junction, 168 conduit, dan 1 outfall. Simulasi 24 jam menunjukkan bahwa 5 saluran berwarna merah, dan profil saluran menunjukkan luapan akibat antrian aliran ke Sungai Cakung. Analisis kapasitas menunjukkan debit simulasi sebelum perbaikan mencapai 44,01 m³/detik. Setelah perbaikan, Sungai Cakung dan saluran perumahan berfungsi dengan baik tanpa adanya luapan. Rancangan Anggaran Biaya untuk perbaikan ini mencapai Rp70.634.573., Flooding is a recurring issue in many parts of Indonesia, including Bekasi. In Harapan Baru 2 Housing Complex, Kotabaru Sub-district, West Bekasi District, floodwaters can reach 100 cm, disrupting daily activities and forcing evacuations. Evaluating the drainage system is crucial to identify the causes of flooding and provide improvement recommendations. Hydrological analysis and modeling with EPA SWMM 5.2 can pinpoint flood points and calculate drainage capacity. This study aims to analyze flooding causes and suggest improvements. Using the Log Pearson III rainfall distribution model with GPM satellite data, a 5-year return period was chosen with 267,87 mm of rainfall. EPA SWMM 5.2 modeling identified 30 subcatchments, 126 junctions, 168 conduits, and 1 outfall. A 24-hour rainfall simulation showed 5 channels in red, signaling overflow. Analysis revealed overflow due to flow queues to the Cakung River. Capacity analysis confirmed this, with pre-improvement simulated discharge and Cakung River capacity reaching 44,01 m³/second. Post-improvement, no overflow or inundation occurred in the Cakung River and residential channels. The estimated budget for these improvements is Rp70.634.573.
Keyword: flood, drainage, EPA SWMM, GPM

Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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