Abstract
Institut Teknologi Bandung (ITB), Ganesha Campus, Indonesia, has an area of 28.86 hectares. The campus is located in Bandung. Starting from 2012, new buildings were constructed within the area, reducing the area of permeable surface significantly. In the past few years, there were several excess run off incidents in the campus. The insufficient area of permeable surface as well as the inadequate capacity of the drainage system contributes to the excess surface run off. The drainage system has only two outlets. Moreover, in some areas, the drainage systems are disconnected. Thus, most the surface run off are stored within the drainage system. The purpose of this study is to evaluate the effectiveness of infiltration wells for reducing the local excess run off in ITB. Precipitation data and drained service area are used to estimate the design discharge from each building in ITB. In order to avoid the excess surface run off of certain locations in ITB, then the infiltration wells are proposed to balance the area of impermeable surface. The effectiveness of the infiltration wells are evaluated by assessing their number to their contribution in reducing the excess surface runs off.
Highlights
Precipitation in Bandung area has increased in the past few years
The rainfall intensity in the last years ascends by 10-20 mm every year [1].Based on Regional Regulation No of 2007 on Green Area
The purpose of this study is to evaluate the affectivity of infiltration wells in order to reduce the excess surface run off in Institut Teknologi Bandung (ITB)
Summary
Precipitation in Bandung area has increased in the past few years. The rainfall intensity in the last years ascends by 10-20 mm every year [1].Based on Regional Regulation No of 2007 on Green Area (RuangTerbuka Hijau/RTH), from 661.4 thousands hectare area of Citarum River Basin, 198 thousands is supposed to be reserved area. Precipitation in Bandung area has increased in the past few years. The rainfall intensity in the last years ascends by 10-20 mm every year [1].Based on Regional Regulation No of 2007 on Green Area Land use and land cover change affect hydrological components such as interception, infiltration and evaporation. They influence the soil moisture content, runoff generation (both process and volume) and stream flow regimes [3]. Previous surfaces decrease the amount of runoff as precipitation infiltrates [4]. These affect the groundwater table [5]
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