PENERAPAN TEKNOLOGI PEMANENAN AIR HUJAN SKALA RUMAH TANGGA UNTUK PEMENUHAN KEBUTUHAN AIR BERSIH PADA DAERAH RAWA

Abstract

Clean water is often a major obstacle, the Rempak Village Community, Siak District
uses water from rivers and shallow wells in their daily lives. However, the water
quality is not suitable for consumption as clean water for household scale. The
amount of rainwater for clean water needs on 2 types of gable and pyramid roofs.
The method used is the Rational Model to find the amount of rainwater discharge
through rainwater catchment. The rainfall data used for the study came from the
Hydrology Section of BWS III Sumatra with the location of the Bunga Raya (Siak)
rainfall recording station from 2016 to 2022. The results of the study prove that the
contribution of rainfall during 2 years of rain with a 110m2 gable roof obtained a
rainfall contribution of 0.935m3 and dimensions of 0,3 × 0,135 × 0,5m, the use of a
90m2 pyramid roof with a rainfall contribution of 0,765m3, the dimensions of the
reservoir tank are 0,2 × 0,2 × 0,365m. The contribution of rainfall during the 5-
year return period with a 110m2 gable roof is 1,122m3 with a reservoir tank
dimension of 0,3 × 0,2 × 0,622m, while a 90m2 pyramid roof has a rainfall
contribution of 0.915m3 with a reservoir tank dimension of 0,2 × 0,1 × 0,635m. The
conclusion of the study is that the more different the roof type and roof area, the
amount of rainwater for clean water needs is also different.