Analisa Dimensi Sumur Resapan Untuk Mereduksi Besar Debit Limpasan Di Kawasan Pemukiman Perkotaan (Studi Kasus Pada Kawasan Urimessing, Kota Ambon)

Authors

  • Charles Johandersson Tiwery Fakultas Teknik Universitas Kristen Indonesia Maluku

DOI:

https://doi.org/10.51135/manumatav6i1p1-11

Keywords:

infiltration wells, reduce runoff, discharge

Abstract

The development of a city resulted in increased urban development. The existence of this development lead to changes in land use in urban areas. The changing creates larger areas of land covered by buildings and roads, and it resulted reducing the infiltration rate and increasing the surface runoff. One of the area in Ambon city, which often have runoff problems is Urimessing area. One attempt to reduce surface runoff is the application of infiltration wells. Infiltration wells serve as storage for rainwater that falls on the roof of a house or land, and enhance recharge the water into the ground. This study is aimed to determine the type, dimension and number of infiltration wells to determine how much recharge that can fit the wells, so the estimation of runoff reduction because of the wells is known. The method used in this research is the hydrological analysis for runoff discharge of the Urimessing area, field tests to find the infiltration rate, Horton method to know the capacity of soil infiltration, and permeability testing in laboratory using falling head permeability test. The results of field and laboratory test are: infiltration capacity is 50.04 cm/h and soil permeability coefficient is 0.0264 cm/sec. From data analysis resulted that type of infiltration well is cylinder with 1 m diameter of well is 1 m and 1.60 m depth.  The number of infiltration wells in the Urimessing area are 884 units, which can accommodate discharge of water at 1.78 m3/sec. The total runoff discharge in the Urimessing area for 50-year return period is 5.53 m3/sec, after the infiltration wells are built will reduce to be 3.75 m3/s, reduced flooding by 32%

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Published

2020-07-01

Issue

Vol. 6 No. 1 (2020)

Section

Articles

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