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Sumaja, Kadek
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Journal : Kappa Journal

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Pengaruh Suhu Terhadap Crosswind dan Tailwind di Bandara I Gusti Ngurah Rai Dengan Metode Regresi Nurhalima, Nurhalima; Sukarasa, I Ketut; Sumaja, Kadek
Kappa Journal Vol 7 No 1 (2023): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i1.17606

Abstract

A study of the effect of runway surface temperature (LST) and sea surface temperature (SST) on crosswind and tailwind in 2012-2021 at Ngurah Rai Airport in Bali has been carried out using the regression method. The purpose of this study was to find out what percentage of LST and SST affect crosswind and tailwind events and how LST and SST influence crosswind and tailwind events at I Gusti Ngurah Rai Airport. Based on the results of monthly calculations from 2012-2021, the influence of LST and SST on crosswind and tailwind only has an effect of 0.8-47.7%. Where the greatest influence occurred in the crosswind from the right plane in May, which was 47.7%. Meanwhile, the influence of LST and SST on the biggest tailwind occurred in November at 22.5%, with the overall percentage in all months showing that LST and SST have a weak relationship to crosswind or tailwind. The influence is quite strong only on the right crosswind in May and the left crosswind in March. However, the size of the influence of LST and SST must still be considered because there are several significant months, especially in the left crosswind and tailwind which can be seen in the results of the F-test. In the right crosswind and tailwind the effect of SST is greater than that of LST, while for the left crosswind it is the other way around.
Analisis Tingkat Perubahan Vegetasi Hutan Mangrove Terhadap Tingkat Salinitas Menggunakan Citra Landsat Ramadhan, Rafly Rizqyta; Baskoro, Winardi Tjahyo; Sumaja, Kadek; Suarbawa, Komang Ngurah; Indrayana, Putu Tedy; Ratini, Ni Nyoman
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.23729

Abstract

Research on the analysis of the level of changes of mangrove forest vegetation on the level of seawater salinity has been conducted with remote sensing methods by using Landsat 8 imagery in Tahura Ngurah Rai. The data used in this research is secondary data from the official website of the USGS (United States Geological Survey). This study aims to determine the levels of changes in mangrove forest vegetation cover in Tahura Ngurah Rai and to determine how much influence the level of mangrove forest vegetation cover has on the level of salinity in Tahura Ngurah Rai. The vegetation values were obtained by processing the NDVI index data and the salinity values were obtained by processing the SI, NDSI and VSSI index. from the results of the analysis that has been conducted, vegetation cover greatly influences the NDSI index with an increase in the total NDVI value of 25,48% and a decrease in the total NDSI value of -25,48%, with a correlation coefficient and determination of NDVI-NDSI 0.998 and 0.996 respectively.
Co-Authors Baskoro, Winardi Tjahyo Indrayana, Putu Tedy Komang Ngurah Suarbawa Ni Nyoman, Ratini Nurhalima, Nurhalima Ramadhan, Rafly Rizqyta Sukarasa, I Ketut