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Journal : Journal of Infrastructure Planning and Engineering

Application of normalized difference vegetation index in classifying land cover change over Bangli regency by using Landsat 8 imagery Putu Aryastana; Maria Imaculata Goran Mosa; Wayan Widiana; I Made Eryana Eka Putra; Gede Rustiawan
Journal of Infrastructure Planning and Engineering Vol. 1 No. 1 (2022)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.1.1.2022.8-14

Abstract

The information on land cover changes is very important in regional spatial planning. Remote sensing technology can minimize the cost and time in analyzing land cover changes. Normalized Difference Vegetation Index (NDVI) is a vegetation index that combines red and near-infrared channels so that it can provide approximate information about land cover in an area. The objective of this study is to extract land cover change information from Landsat 8 images based on NDVI values in Bangli Regency in 2015 and 2021. The classification method used to estimate the type of land cover is supervised classification. The results reveal the decrease of the land cover in the category of water body, sand, dry land/soil, rice fields, and vegetation, which are 1.62%, 14.14%, 7.93%, 8.63%, and 2.45%, respectively, while an increase in the settlement category by 30.12%. The overall accuracy of land cover classification result based on NDVI value is 86.54%.
Alternative weir design using circular crested type and vlughter type energy dissipators on the Yeh Empas Longstorage in Tabanan Regency I Dewa Ayu Mega Swari; Cok Agung Yujana; Ni Made Widya Pratiwi; Putu Aryastana
Journal of Infrastructure Planning and Engineering Vol. 2 No. 1 (2023)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.2.1.2023.28-35

Abstract

Climate change affects seasonal changes throughout the world, including in Indonesia a tropical country that experiences rainy and dry seasons with the possibility of facing drought or flood disasters. The long storage construction has an objective to overcome the problem of water availability during the dry and rainy seasons. The Yeh Empas long storage is one of the construction weirs with rubber as a barrier and a movable gate in the Yeh Empas River as a reservoir for raw water for Tabanan Regency. The utilization of movable gates and rubber weir bodies has disadvantages in terms of cost and construction time due to the ordering time. The objective of the current study is to design an alternative weir using circular crested type and Vlughter type energy dissipators without replacing the long storage function. The weir was designed by implementing a 100-year return period flood discharge of 163.29 m3/dt. The design result depicts the dimensions of weir elements consisting of the crest radius, the crest height, the energy dissipator length, the upstream slope, the downstream slope, and the effective width is 1.00 m, 3.30 m, 5.70 m, 2:3, 1:1, and 26.31 m, respectively.
Co-Authors A. A. Ngr. Billy Narendra Agustini, Ni Komang Ayu Ahadina, Anak Agung Ananda Surya Ayugde Anak Agung Gede Sumanjaya 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 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 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 Kadek Surya Dwangga Kadek Windy Candrayana Koli, Alexander Y. Krisna Dwipa Yana Kurniawan, I Putu Manik M. Sudiana Mahendra Maria Imaculata Goran Mosa Maria Imaculata Goran Mosa Marselus Putra Mawo Kasa Sairo 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 Wayan Widiana Wikan Pradnya Dana, Gde Windy Candrayana, Kadek Wui, Jackson Chang Hian Yanti Dewi, Ni Komang Yasa Bagiarta, I Ketut Yujana, Cokorda Agung