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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Science and Science Education (JoSSEd)
I Dewa Gede Jaya Negara
University of Mataram
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Neuroscience Physics

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Assessment of Duration and Frequency of Drought by Percent Normal Precipitation Index (PNPI) for Lombok Island Humairo Saidah; Muh. Bagus Budianto; I Wayan Yasa; Syamsul Hidayat; I Dewa Gede Jaya Negara; Heri Sulistiyono
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (939.311 KB) | DOI: 10.29303/jossed.v3i1.1452

Abstract

Meteorological drought is a climatic condition categorized by a scarcity of rainfall. Understanding the drought characteristics is a significant step appointed uncertain climate conditions due to current global climate change. This study aims to assess the duration and frequency of drought using the Normal Precipitation Index (PNPI) method to identify drought characteristics in the study area. The PNPI revealed a spatial variation in percent value monthly rainfall to average rainfall across the island of Lombok that prolonged and severe droughts have occurred in entire study areas with varying duration and frequency. PNPI method in analyzing drought events in the island of Lombok showed that Sopak is the driest area and Sekotong is the wettest one
The Climate Change Impact on Drought Characteristics in North Lombok Regency Humairo Saidah; Lilik Hanifah; I Dewa Gede Jaya Negara
Jurnal Penelitian Pendidikan IPA Vol 9 No 5 (2023): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i5.2380

Abstract

Lombok Island is part of Indonesia which has a high vulnerability to drought. The area that often experienced drought severely on Lombok Island is North Lombok Regency. This study wants to examine the effect of climate change on drought characteristics in this region using the standardized precipitation index method using four rain stations in the North Lombok region rainfall recording data of 20 years (1999-2018). The analyses were taken into two groups of a 10-year time scale, 1999-2008 and 2009-2018, to overview both of the 10-years drought characteristics. Drought index values ​​were observed on a period of 1-month (SPI1), 3-months (SPI3), and 6-months (SPI6) to get the map of drought duration, drought magnitude, drought intensity, and relative frequency. The results show that the drought characteristics in Lombok showed a decrease significantly in all measurement parameters used. The SPI3 results have shown the drought duration was decreasing in the last 10 years by 87%, from 2,43 to 0.03 months. The strength of the drought decreased by 88%, from -1.03 to 0.12 (severely dry to normal). Then the drought intensity became lower up to 87% from -0.22 to -0.03 monthly, and the relative frequency of drought events decreased by 83%. Signs of the decline were further followed by the same decreasing trends in the 6-month drought index, SPI6. The decrease in the drought parameter index illustrates that climate change impact has reduced the risk of drought disaster on the island of Lombok in the future
Co-Authors Heri Sulistiyono Hidayat, Syamsul Humairo Saidah I Wayan Yasa Lilik Hanifah Muh. Bagus Budianto