Sedyowati, Laksni ORCID: https://orcid.org/0000-0001-9170-9864 and Susanti, Eko Indah (2016) The Use Of Rainfall Simulator In The Modelling Of Rainfall-Runoff On A Paving Block Surface. In: HATHI The 5th International Seminar on Water Resilience in a Changing World, 2016, 29-31 July 2016, Bali, Indonesia.

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Abstract

Inaccuracies on the calculation of runoff discharge into the drainage system lead the design become overestimate or underestimate. Runoff discharge can be determined by using a rainfall-runoff relationship. The accurate rainfall-runoff relationship model can be obtained through direct field observation. Using natural rain for observation by relying on the actual rainfall event will be difficult. Therefore, a tool that can actualize the relationship between rainfall and runoff discharge as the response of rainfall to the catchment area is needed. The tool is a rain simulator that produces precipitation according to the needs of research, which is applied to a test plot. This study aims to calibrate rainfall intensity resulted from rainfall simulator that applied to a plot of paving blocks. Selectionof paving block plot is driven by the increasingly use of paving blocks as roads, parking lots, etc. The research stages include review of rainfall simulator technology that already exists; creating a rainfall simulator that suitable to the research objectives; calibration and performance evaluation of the rainfall simulator. The results are a rainfall simulator with the distribution of uniformity about 78% and the calibration curve of pressure-rainfall intensity expressed by power function I=2.6489P1.2183 (P: pressure, I: rainfall intensity).

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