PENGARUH FAKTOR GEOMETRIK SUMUR RESAPAN TERHADAP PERENCANAAN DIMENSI SUMUR RESAPAN DAN PENGURANGAN LIMPASAN PERMUKAAN

Abstract

To solve the problem of flooding and to conserve groundwater, many infiltration wells have been built. The dimensions and number of infiltration wells are influenced by the geometric factor of an infiltration well. Therefore, this paper discusses the influence of infiltration well geometric aspect on the dimensional planning and the number of infiltration wells needed and feasible to build based on the existing land limitations. The planning of infiltration wells uses the Sunjoto method. The study location is in the UII integrated campus. The rainfall data were taken from the Prumpung station in 1998 - 2016. The more significant the infiltration well geometric factor, the smaller the number and dimensions of infiltration wells. For example, in the D3 Ekonomi complex, for a type of infiltration well with a diameter of 1.5 m and a height of 4 m, with "F = 2π" R, eight units are needed, while an infiltration well with "F = " "π" ^2 R require seven units. Likewise for other complexes. With the limited land available, the greater the infiltration well geometric factor used, the reduction in surface runoff is not much change, almost the same, namely 59.73 % with F = 2πR (or F=4.7124 m) and 59.79 % with F = π^2*R (or F=7.4022 m).