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

1st International Conference on Environmental Geography and Geography Education

生态环境科学;地球科学

Sujarwo, M.W.^1 ; Indarto^1 ; Hidayah, E.^2

Dept. of Agricultural Water Resources Management, Postgraduate Faculty, University of Jember, Jalan Kalimantan, No. 37 Kampus Tegalboto Jember, East Java

68121, Indonesia^1

Dept. of Civil Engineering, Faculty of Engineering, University of Jember, Jalan Kalimantan, No. 37 Kampus Tegalboto Jember, East Java

68121, Indonesia^2

关键词: Extreme rainfall;    Frequency distributions;    Measurement sites;    Meteorological disasters;    Point measurement;    Rainfall variability;    Spatial variability;    Temporal and spatial;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/243/1/012026/pdf
DOI  :  10.1088/1755-1315/243/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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.