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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Teknik Gradien
I Ketut Kembarajaya
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Civil Engineering, Building, Construction & Architecture

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Analysis of Spatial Interpolation Method for Rainfall Mapping of Hydrometeorological Disaster Mitigation Design in Denpasar, Bali Tri Hayatining Pamungkas; Gede Sumarda; I Gusti Made Sudika; I Gusti Ngurah Eka Partama; I Ketut Kembarajaya; Kadek Budhi Warsana
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 22 No. 1 (2026): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v22i1.90147

Abstract

Climate change and rapid urbanization are increasing the intensity and uncertainty of rainfall in urban areas, including Denpasar City. The transition from the dry season to the rainy season is often followed by extreme rainfall that triggers floods, disrupts community activities, damages infrastructure, and significantly hinders economic activities. This condition is exacerbated by massive land conversion and the accumulation of waste that clogs drainage systems, leading to a drastic decrease in surface water holding capacity. Therefore, hydrometeorological disaster mitigation has become an urgent need, which must be supported by accurate and reliable spatial rainfall information to identify vulnerable areas and design more effective flood control strategies. This study evaluates and compares the spatial interpolation methods of Inverse Distance Weighting (IDW), Kriging, and Spline in mapping the distribution of design rainfall in Denpasar City. Data were obtained from six stations over the period 2013–2022 and analyzed based on various return periods, namely 2, 5, 10, 15, 20, 25, and 50 year. To comprehensively assess the performance of interpolation methods, statistical indicators such as Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), Root Mean Squared Error (RMSE), and Coefficient of Determination (R²) were used. The results show that IDW is most accurate for short return periods, particularly 2 year, with low MAE, MAPE, and RMSE and high R². Kriging excels for medium to long return periods (5–50 years), producing stable predictions that closely match the observed data, while Spline tends to have higher errors and low R², especially for long return periods. This result confirms that IDW and Kriging are the most reliable and accurate methods for mapping the distribution of design rainfall in Denpasar City. 
IMPLEMENTASI SISTEM MANAJEMEN KESELAMATAN DAN KESEHATAN KERJA KONSTRUKSI DI INDONESIA (STUDI LITERATUR) I Ketut Kembarajaya; Tri Hayatining Pamungkas; EKA PARTAMA, I GUSTI NGURAH
Jurnal Teknik Gradien Vol 18 No 01 (2026): JURNAL TEKNIK GRADIEN (On progress)
Publisher : Fakultas Sains dan Teknologi Universitas Ngurah Rai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47329/teknikgradien.v18i01.1799

Abstract

Penerapan Sistem Manajemen Keselamatan dan Kesehatan Kerja (SMK3) merupakan aspek penting dalam pengendalian risiko keselamatan pada sektor konstruksi yang memiliki tingkat bahaya kerja tinggi. Penerapan SMK3 di Indonesia diatur sesuai PP Nomor 50 Tahun 2012 dan  diperkuat dengan Permen PUPR Nomor 10 Tahun 2021 tentang Sistem Manajemen Keselamatan Konstruksi (SMKK). Penelitian ini bertujuan meninjau penerapan SMK3 pada sektor konstruksi di Indonesia, menilai kesesuaiannya terhadap regulasi yang berlaku, serta mengidentifikasi tantangan dan dampak implementasi di tingkat proyek. Metode penelitian yang digunakan adalah Systematic Literature Review (SLR) dengan pendekatan deskriptif kualitatif terhadap artikel dengan tema sejenis yang terpublikasi dalam kurun waktu tahun 2021–2025. Proses seleksi literatur dilakukan melalui alur PRISMA dengan kriteria inklusi tertentu, sehingga diperoleh 35 artikel yang dianalisis. Hasil kajian menunjukkan bahwa penerapan SMK3 pada proyek konstruksi di Indonesia secara umum telah berjalan dan mengacu pada kerangka regulasi yang ada, namun tingkat implementasinya masih bervariasi antar proyek. Penerapan SMK3 pada proyek berskala besar cenderung lebih terstruktur dibandingkan proyek berskala kecil dan menengah. Tantangan utama yang teridentifikasi meliputi dominasi pendekatan administratif, keterbatasan pengawasan, serta belum terinternalisasinya budaya keselamatan kerja. Temuan ini menegaskan bahwa peningkatan efektivitas penerapan SMK3 memerlukan penguatan implementasi di lapangan, komitmen manajemen proyek, serta pembinaan keselamatan kerja yang kontinyu.
Co-Authors Eka Partama, I Gusti Ngurah Gede Sumarda I Gusti Made Sudika Kadek Budhi Warsana Tri Hayatining Pamungkas