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Journal : U Karst

Grid Satellite Rainfall Products Potential Application for Developing I-D and E-D Thresholds for Landslide Early Alert System over Bali Island Putu Aryastana
UKaRsT Vol. 7 No. 1 (2023): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v7i1.4318

Abstract

Bali has been one of the most popular tourist destinations in Indonesia. However, on the other hand, Bali has a high risk of natural disaster vulnerability. The number of landslides in Bali took the first position compared to other natural disasters. Currently, remote sensing platforms can present Grid Satellite Rainfall Products (GSRPs), which provide rainfall information that can identify rainfall conditions for landslide events. This study aims to analyze the potential GSRPs application of Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks (PERSIANN), the Integrated Multi-satellite Retrievals for Global Precipitation Measurement (IMERG), and Global Satellite Mapping of Precipitation (GSMaP) in determining the mean rainfall intensities and duration (I-D); accumulated rainfall and duration (E-D) thresholds for landslide occurrences over Bali Island. The method used to develop I-D and E-D thresholds is the power-law equation and frequentist sampling method in various probability levels (5%, 10%, 20%, 30%, 40%, and 50%). The result shows that I-D and E-D thresholds established by GSRPs are generally lower than the threshold defined by rain gauge observations. Among the three GSRPs, IMERG is performing the best in establishing the I-D and E-D thresholds for landslide phenomena. The level of potential that IMERG can use in developing the I-D and E-D thresholds is 59.16% and 84.06%, respectively. The E-D threshold derived from the IMERG product can be used to establish the landslide early alert system over Bali Island because it has a high spatial-temporal resolution, word-wide coverage, and near-real-time observation.
Co-Authors A. A. Ngr. Billy Narendra Agustini, Ni Komang Ayu Ahadina, Anak Agung Ananda Surya Ayugde Anak Agung Gede Sumanjaya Anak Agung Sagung Putri Gita Suari Samitra Ardantha, I Made Ardhanaresvari, Tiara Rekha Asmani K., Anak Agung Rai Aureo Da Costa Belo Bhaskara, Made Adi Budha, I Ketut Candrayana, Kadek Windy Cok Agung Yujana Cok Agung Yujana Darma, I Gede Wira Dewa Ayu Nyoman Sriastuti, Dewa Ayu Nyoman Dewi, Listya Dharma, I Made Sotya Wira Diva, I Wayan Ditya Maha Gede Rustiawan Gede Sumarda Gede Suranata, Putu I Dewa Ayu Dwi Darmayanti I Dewa Ayu Mega Swari I Gede Yogi Adnyana Puspita Riana I Gusti Agung Putu Eryani I Gusti Ngurah Agung Widya I Ketut Budha I Komang Angga Darmayasa I Made Ardantha I Made Ardantha I Made Dwipa Jaya I Made Eryana Eka Putra I Made Kariyana I Made Okdivian Soekaratha I Made Surya Kumara I Made Wika Darmawan I Nengah Sinarta I Nyoman Sai Santya I Putu Ellsa Sarassantika I Putu Suta Suyasa I Wayan Muliawan I Wayan Runa I Wayan Wartana Ida Ayu, Trisuci Arnawati Ida Bagus Gede Indramanik Ida Bagus Made Yatana Ilona Dwiyeni Nahak Jason Pajimola Punay Kadek Surya Dwangga Kadek Windy Candrayana Krisna Dwipa Yana Krisna Himawan Subiyanto Kurniawan, I Putu Manik M. Sudiana Mahendra Maria Imaculata Goran Mosa Marselus Putra Mawo Kasa Sairo Morim, Gruberth Dirk Mulia, Hendy Ardhito Ni Kadek Ari Gita Cahyani Ni Ketut, Natalia Wulansari Ni Komang Ayu Agustini Ni Komang Ayu Agustini Ni Komang Ayu Agustini Ni Komang Sintyawati Ni Luh Putu, Laksmini Ni Made Ola Ulandari Ni Made Widya Pratiwi Ni Made Widya Pratiwi Ni Putu Widya Yuniari Ni Wayan Pani Nadia Sari Ni Wayan Wahyuni Nugraha, Cokorda Gede Eka Pradana, Rajendra Bayu PUTU IKA WAHYUNI Rahadiani, Anak Agung Sagung Dewi Raharja, I Kadek Agus Wahyu Rahmayanti, Ni Made Prisca Sinda, Longginus Subiyanto, Krisna Himawan Sumanjaya, Anak Agung Gede Suranata, I Putu Gede Tasuku Tanaka Tri Hayatining Pamungkas Triswandana, I Wayan Gde Erick Wayan Gde Erick Triswandana Wayan Wahyu Adnyana Tamara Wayan Widiana Wikan Pradnya Dana, Gde Windy Candrayana, Kadek Wui, Jackson Chang Hian Yanti Dewi, Ni Komang Yasa Bagiarta, I Ketut Yujana, Cokorda Agung