Desain Ecodrain Gedung Bandung Advanced Science and Creative Engineering Space (BASICS) di Kota Bandung

Abstract

Perubahan tata guna lahan akibat pembangunan mengakibatkan perubahan koefisien pengaliran (C). Sumur resapan merupakan metode drainase ramah lingkungan (ecodrain) yang paling praktis. Penelitian ini bertujuan untuk mendesain sistem drainase ramah lingkungan di gedung BASICS. Curah hujan dianalisis dengan metode gumbel, metode log normal, metode normal dan metode log pearson III. Analisis dimensi saluran rencana dilakukan dengan metode trial and error. Hasil analisis debit limpasan sebesar 1,41 m3/detik dan debit rencana yang didapatkan untuk setiap daerah tangkapan air (DTA) sebesar 0,14 m3/detik pada sub-DTA1, 0,05 m3/detik pada sub-DTA2 dan 0,04 m3/detik pada sub-DTA3. Saluran kolektor direncanakan kembali karena saluran tidak mampu menampung debit rencana. Sumur resapan direncanakan kembali karena tidak dapat memenuhi kebutuhan volume minimum menurut peraturan yang berlaku. Perencanaan kembali saluran kolektor menghasilkan desain saluran dengan lebar 1,1 m dan kedalaman 1,3 m. Perencanaan kembali sumur resapan menghasilkan desain dengan dimensi diameter 1,5 m dan kedalaman 2,5 m sebanyak 51 buah.

Changes in land use due to development result in the flow coefficient (C) changed. Infiltration wells are the most practical ecodrain method. This study aimed to design an environmentally friendly drainage system in the BASICS building. Rainfall was analyzed by the Gumbel method, the normal log method, the normal method and the Pearson III log method. Dimensional analysis of the design channel was carried out by trial and error method. The results of the analysis of runoff discharge are 1,41 m3/s and the planned discharge obtained for each catchment area (DTA) is 0,14 m3/s in sub-DTA1, 0,05 m3/second in sub-DTA2 and 0,04 m3/s on sub-DTA3. The collector channel was re-design because the channel was unable to accommodate the planned discharge. The infiltration well is planned to be re-design because it cannot meet the minimum volume requirement according to the existing regulations. The re-design of the collector channel resulted in a channel design with 1,1 m width and 1,3 m depth. The redesign of infiltration wells resulted in a design with a diameter of 1,5 m and a depth of 2,5 m as many as 51 unit.