期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：437
期号：1
DOI：10.1088/1755-1315/437/1/012034
语种：English
出版社：IOP Publishing
摘要：Inundations occur and become problems in the City of Palu. Inundations occur due to outdated drainage systems, high levels of sedimentation, rapid urban development and topography that tends to be flat. The offered alternatives are rehabilitation of existing drainage channels, storage pond equipped with an automatic valve door, rainwater harvesting and gully plugs. Rehabilitation is performed by adjusting drainage depth, with consideration of the shallow groundwater in the area. For rainwater harvesting, the capacity of rain barrels varies from 350-1050 litres, and they are equipped with reservoir wells. With combinations of these alternatives, the inundation reduction effectiveness of catchment area (DTA) 1 is 93.5% and 99.6% for DTA2. Comparing the results to gully plugs, the effectiveness of inundation reduction in DTA1 is 81% and in DTA2 is 98.9%. The Budget Plan for rainwater harvesting varies depending on the capacity of rain barrels, ranging from Rp. 1, 492, 505.00 to Rp. 2, 692, 505.00. Gully plugs also vary in costs from Rp. 556, 000.00 to Rp. 808, 000.00, depending on the size of the gully plug. The first alternative is chosen by the combination of drainage rehabilitation, construction of a storage pond equipped with an automatic valve door, and rainwater harvesting. This is because the reduction effectiveness is greater and the rainwater harvesting maintenance is easier.
