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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Unram Journal of Community Service (UJCS) Journal of Science and Science Education (JoSSEd)
I Dewa Gede Jaya Negara
University of Mataram
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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
Socialization of Environmental Road Maintenance in Settlements with the Application of Biopores to Reduce Water Runoff to the Road Surface I Dewa Made Alit Karyawan; I Dewa Gede Jaya Negara; I Wayan Yasa; Made Mahendra; I Wayan Joniarta
Unram Journal of Community Service Vol. 5 No. 2 (2024): June
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i2.610

Abstract

As a result of rapid population growth, the Montong Are area in Mandalika Village, Mataram City experienced a change in land use from rice fields to residential land. The main obstacle faced is inadequate drainage due to the low position of the location and the height of the ground water level. Therefore, water often overflows onto the road surface during the rainy season, hampering traffic and causing damage to infrastructure. Water runoff can be reduced and drainage can be improved with the use of low-tech solutions such as biopores. Biopores outreach and training is needed to build a sustainable housing environment and reduce the negative impact of water runoff on road infrastructure. The stages of socialization activities include: Preliminary Survey; Preparation for implementation; Implementation of Socialization; evaluation stage; and Preparation of Reports and Outputs. The socialization activity began with the delivery of material about biopores and discussion, followed by a demonstration on how to make biopores. The community has been successfully educated about biopores and their function in absorbing rainwater into the soil and reducing the possibility of erosion and flooding. The community was very enthusiastic about taking part in the socialization of biopores making activities considering its benefits for use in road maintenance activities. The knowledge gained can increase public awareness of utilizing this concept as a solution that can be applied to overcome the problem of runoff and flooding on the road surface. So that people can actively participate in the construction and maintenance of biopores around where they live because of the benefits they experience
Co-Authors Heri Sulistiyono Hidayat, Syamsul Humairoh Saidah I Wayan Joniarta I Wayan Yasa Karyawan, I Dewa Made Alit Lilik Hanifah Made Mahendra Muh. Bagus Budianto