Spatio-temporal of climate extreme rainfall variability over the Nusantara Capital City of Indonesia (IKN)

Abstract

Extreme rainfall has increased in many regions over the Indonesia Maritime Continent (IMC), including the Indonesia's newly developing capital city of Nusantara (IKN). In the previous research, rain gauge data from five stations of the Agency for Meteorology, Climatology and Geophysics (BMKG) were utilized. The studies showed a slightly increasing trend of rainfall were observed over all stations. Continuing those studies, this paper aims to gain more detailed spatial and temporal rainfall variability by utilizing gridded rainfall data from satellite remote sensing. The historical data over 23-year period of Global Satellite Mapping of Precipitation (GSMaP) and the Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) have been used to identify long-term trends, spatial patterns, and the relationship between extreme rainfall and topographical conditions, as well as other meteorological factors. The analysis will involve descriptive statistics, temporal trend, and geospatial mapping. Eventually, we expect that the findings could help to improve the water availability for food security system, such as determining cropping patterns at certain periods which is urgently required in the region.