Abstract
Kedungkandang District is one of the fastest growing areas in Malang City and become a urban area. The implication this development is dcreasing of urban open space area by 1 - 2% per year, and followed by increased surface flow during rain. Infiltration well is one of the efficient rainwater utilization to reduce run-off. In Kedungkandang district three are different soil types which affects the permeability coefficient value for determination the dimension of infiltration well. This study aimed to determine the dimension of infiltration wells suitable for application individual infiltration wells for housing type 36, 45, 54, 70, 90 and 110. In order to determine dimension of infiltration wells would be used, there were some analysis done: hydrology and soil permeability coefficient. The conclusion from this research was the bigger the house size, it would need a bigger dimension of infiltration well as well. From the three types of soil in Kedungkandang, the houses in alluvial fan ground type and tuff volcanic soil require a smaller size of infiltration wells than the houses located in Buring volcano mountain sediments. Key words: infiltration well, run-off
Highlights
Changes in land use due to increased urbanization and development have a significant impact on hydrological processes [1], [2]
The conclusion from this research was the bigger the house size, it would need a bigger dimension of infiltration well as well
From the three types of soil in Kedungkandang, the houses in alluvial fan ground type and tuff volcanic soil require a smaller size of infiltration wells than the houses located in Buring volcano mountain sediments
Summary
Changes in land use due to increased urbanization and development have a significant impact on hydrological processes [1], [2]. Land with 30-50% impervious surface can infiltrates into the aquifer 15-20% runoff. Land with 75%100% impervious surface can infiltrates into the aquifer only 5-10%, over one half becomes srface run-off [3]. It is not enough to do the drainage channel development only, because the drainage channel is only able to drain and divert rainwater runoff [4]. There is a need to increase absorbing areas to resolve flooding and inundation problems in urban areas [5]. If there is absorbing area provided , urban run-off will decrease and restore the stability of the hydrological process [5]. Infiltration well is one of the most efficient methods of efficient rainwater absorption capable to disentangle urban run-offs[6]
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