An analysis of extreme rainfall trends from 1960 to 2015 in urban areas of Surabaya

Extreme rainfall event considered as the primary cause of many hydro-meteorological disasters around the world. Extreme rainfall event propagated more prolonged disaster when occurring in urbanised areas. This research presents an analysis of trend and rainfall variability in the most urbanised area...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2019-04, Vol.243 (1), p.12026
Main Authors: Sujarwo, M W, Indarto, Hidayah, E
Format: Article
Language:English
Subjects:
Disasters
Frequency distribution
Hydrologic data
Hydrometeorology
Interpolation
Natural disasters
Rainfall
Trends
Urban areas
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Summary:Extreme rainfall event considered as the primary cause of many hydro-meteorological disasters around the world. Extreme rainfall event propagated more prolonged disaster when occurring in urbanised areas. This research presents an analysis of trend and rainfall variability in the most urbanised areas of East Java. The study is conducted at Surabaya City and its sub-urban areas (Mojokerto, Sidoarjo). Daily rainfall data from 1960 to 2015 obtained from existing measurement sites are used as input for this study. Firstly, a frequency distribution of extreme rainfalls (1-day maximum) is presented. Then, analysis of trend detection conducted using Mann-Kendall, Rank-Sum and Median Crossing test. Finally, spatial variability of extreme rainfall was presented by interpolating point measurement to produce thematics maps. The interpolation was conducted using IDW methods. The results show the trend and variability (temporal and spatial) of extreme rainfalls on the regions of Surabaya.
ISSN:1755-1307
1755-1315
1755-1315
DOI:10.1088/1755-1315/243/1/012026