Re-assessing Rainwater Harvesting Volume by CHIRPS Satellite in Semarang Settlement Area

Yosef Prihanto, Raldi H. Koestoer, Dwita Sutjiningsih

Research output: Contribution to journalConference article

Abstract

Semarang City is one of the most influential coastal cities in Java Island. The city is facing increasingly-high water demand due to its development and water problems due to climate change. The spatial physiography and landscape of Semarang City are also exposed the city to water security problem. Hence, rainwater harvesting treatment is an urgent effort to meet the city's water needs. However, planning, implementation and management of rainwater harvesting are highly depended on multitemporal rainfall data. It has not yet been fully compiled due to limited rain stations. This study aims to examine the extent to which CHIRPS satellite data can be utilized in estimating volume of rainwater harvesting 16 sub-districts in Semarang and determine the water security status. This study uses descriptive statistical method based on spatial analyses. Such method was developed through spatial modeling for rainfall using isohyetal model. The parameters used are rainfall, residential rooftop area, administrative area, population, physiographic and altitude units. Validation is carried out by using monthly 10 rain stations data. The results show level of validity by utilizing CHIRPS Satellite data and mapping rainfall distribution. This study also produces a potential map of distribution rainfall volume that can be harvested in 16 sub-districts of Semarang.

Original languageEnglish
Article number012004
JournalIOP Conference Series: Earth and Environmental Science
Volume98
Issue number1
DOIs
Publication statusPublished - 20 Dec 2017
Event5th Geoinformation Science Symposium 2017, GSS 2017 - Yogyakarta, Indonesia
Duration: 27 Sep 201728 Sep 2017

Keywords

  • CHIRPS
  • Isohyetal
  • Rainwater Harvesting
  • Spatial
  • Urban

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