PERENCANAAN SISTEM JARINGAN DRAINASE KAWASAN PERUMAHAN (Studi Kasus Perumahan Tana Aliya Kecamatan Dau Kabupaten Malang)

Population growth is increasing so that residential needs such as housing are increasing. However, housing development raises problems with rainwater management which impact the risk of flooding. So effective drainage planning is needed, with rainfall data from rain stations close to the Petungsewu Station location. From this data, it was calculated using the equation of the Log Pearson Type III method with a return period of two years. Then a test was carried out to detect the suitability of the method using the Smirnov Kolmogorov test. And the resulting difference between empirical and theoretical opportunities results in Δmax = 0.139 < Δcr = 0.410 so that the spread distribution is appropriate. And the planned rainfall was 93.34 mm. The drainage coefficient value is determined and planned based on the average coefficient of the drainage area. In the Tana Aliya housing complex there are 110 units with a population of 404 people. The assumed average amount of water needed is 0.001389 L/second/person. The planned flood discharge is generated from the rain discharge added to the dirty water discharge. The largest design flood discharge was obtained at 0.2564 m3/second. Then calculate the drainage channel planning. There are 3 types of effective channel dimensions, namely (30cm x 30cm), (40cm x 40cm), and (50cm x 40cm), with a guard height of 20 cm.