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Rancang Bangun Kalibrator untuk Sensor Kadar Air Tanah Aulia Rahman, Marlita; Rachmawardani, Agustina; Sofwan Lukito, Ibnu
Jurnal Sains Dasar Vol 8, No 1 (2019): April 2019
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v8i1.38696

Kadar air tanah merupakan salah satu unsur iklim yang diamati di BMKG (Badan Meteorologi Klimatologi dan Geofisika). Alat ukur kadar air tanah wajib dikalibrasi minimal 1 tahun sekali. Penelitian ini bertujuan membuat kalibrator untuk sensor kadar air tanah tersebut. Komponen yang digunakan yaitu sensor Profile Probe PR2/6, LCD 20×4, Arduino mega 2560, RTC DS3231, keypad 3x4, micro-SD card, dan adaptor sebagai catu daya. Hasil pengukuran dapat ditampilkan melalui LCD dan aplikasi pada PC (Personal Computer). Pengujian alat dilakukan dalam 4 tahap, yaitu uji komparasi, uji port alat, uji kinerja alat, dan uji tampilan PC. Hasil pengujian komparasi alat menunjukkan bahwa alat dapat beroperasi dengan baik dengan nilai simpangan baku dan ketidakpastian yang masuk dalam batas toleransi WMO sebesar ±5 %. Hasil pengujian lainnya yaitu pengujian port, pengujian kinerja alat, dan pengujian tampilan PC menunjukkan bahwa alat dapat bekerja dengan baik.

Prediksi Banjir menggunakan ANFIS-PCA sebagai Peringatan Dini Bencana Banjir RACHMAWARDANI, AGUSTINA; WIJAYA, SASTRA KUSUMA; PRAWITO, PRAWITO; SOPAHELUWAKAN, ARSHASENA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 2: Published April 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i2.335

ABSTRAKDi antara kejadian bencana yang terjadi di Indonesia, 76 persen terdiri dari bencana hidrometeorologi seperti banjir, badai, longsor, dan kebakaran hutan. Provinsi DKI Jakarta sebagai daerah perkotaan sangat rentan terhadap banjir. Persamaan matematis yang kompleks dapat digunakan untuk memodelkan kejadian banjir secara fisik. Sistem pembelajar (machine learning) adalah sistem yang merancang dan mengembangkan algoritma yang menggunakan data historis untuk melakukan prediksi banjir. Dengan menggunakan data ini, sistem pembelajar dapat menghasilkan nilai probabilitas dasar, yang sangat membantu sistem prediksi, memberikan solusi yang lebih hemat biaya dan kinerja yang lebih baik. Prediksi yang akurat dan tepat dapat membantu strategi pengelolaan sumber daya air, analisis kebijakan dan rekomendasi serta pemodelan evakuasi lebih lanjut. Penelitian ini akan dibahas tentang Perancangan Sistem Peringatan Dini Banjir berbasis Ensemble Machine Learning sebagai mitigasi bencana banjir. Hasil dari penelitian menunjukkan nilai RMSE dari algoritma ANFIS – PCA adalah sebesar 0.12 dan koefisen korelasi (R2) sebesar 0.856.Kata kunci: Prediksi Banjir, Machine Learning, ANFIS, ANFIS – PCA ABSTRACTThe nation of Indonesia is prone to disaster, with 76% of natural disasters being hydrometeorological, such as floods, landslides, tropical cyclones, and droughts. Flood occurrences can be physically modeled using complex mathematical equations. Machine Learning serves as a system for designing and developing algorithms that can predict flood events using historical data. Machine learning systems can leverage existing data to produce underlying probability values, making significant contributions to prediction systems that offer better performance and cost-effective solutions. Accurate predictions contribute to water resource management strategies, policy recommendations, and further evacuation modeling. This research will discuss an Early Warning Flood System design based on Ensemble Machine Learning as a flood disaster mitigation measure. The research results show that the RMSE value and coefficient correlation (R2) for the ANFIS - PCA algorithm are 0.12 and 0.856, respectively. Keywords: Flood Early Warning, Machine Learning, ANFIS, ANFIS – PCA

A Web-Based Machine Learning Approach for Standardized Precipitation Index Prediction Hadi, Ahmad Fauzi Faishal; Sinambela, Marzuki; Rachmawardani, Agustina; Trihadi, Edward
Jurnal Teknik Informatika UNIKA Santo Thomas Vol 10 No. 1 : Tahun 2025
Publisher : LPPM UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Accurate and user-friendly drought forecasting tools are crucial for mitigating the impact of meteorological droughts, particularly in vulnerable areas such as South Sumatra, Indonesia. This study introduces an interactive web-based application built to anticipate drought conditions by forecasting the Standardized Precipitation Index (SPI). The system relies on deep learning techniques trained using three decades of rainfall data collected from the Climatological Station in South Sumatra. In evaluating model performance, both Recurrent Neural Network (RNN) and Long Short-Term Memory (LSTM) architectures were assessed. While both models delivered comparable short-term predictions, the LSTM experienced a significant decline in accuracy over extended forecasting periods (specifically at SPI-6), primarily due to overfitting. In contrast, the RNN displayed more stable and reliable results, making it the preferable model for this geographical context. Specifically, the RNN achieved a lower Mean Absolute Error (MAE) of 0.4007, a reduced Root Mean Squared Error (RMSE) of 0.4684, and a higher coefficient of determination (R²) of 0.7338. These metrics outperformed those of the LSTM, which recorded a MAE of 0.4115, an RMSE of 0.4840, and an R² of 0.7036. Such results confirm that the RNN offers a more precise and dependable fit for the station’s dataset. The web platform also effectively visualizes the model outputs, providing a dynamic and interactive 24-month forecast view that supports early warning efforts and informed decision-making for regional authorities and stakeholders.

A Web-Based Machine Learning Approach for Standardized Precipitation Index Prediction Hadi, Ahmad Fauzi Faishal; Sinambela, Marzuki; Rachmawardani, Agustina; Trihadi, Edward
Jurnal Teknik Informatika UNIKA Santo Thomas Vol 10 No. 1 : Tahun 2025
Publisher : LPPM UNIKA Santo Thomas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Accurate and user-friendly drought forecasting tools are crucial for mitigating the impact of meteorological droughts, particularly in vulnerable areas such as South Sumatra, Indonesia. This study introduces an interactive web-based application built to anticipate drought conditions by forecasting the Standardized Precipitation Index (SPI). The system relies on deep learning techniques trained using three decades of rainfall data collected from the Climatological Station in South Sumatra. In evaluating model performance, both Recurrent Neural Network (RNN) and Long Short-Term Memory (LSTM) architectures were assessed. While both models delivered comparable short-term predictions, the LSTM experienced a significant decline in accuracy over extended forecasting periods (specifically at SPI-6), primarily due to overfitting. In contrast, the RNN displayed more stable and reliable results, making it the preferable model for this geographical context. Specifically, the RNN achieved a lower Mean Absolute Error (MAE) of 0.4007, a reduced Root Mean Squared Error (RMSE) of 0.4684, and a higher coefficient of determination (R²) of 0.7338. These metrics outperformed those of the LSTM, which recorded a MAE of 0.4115, an RMSE of 0.4840, and an R² of 0.7036. Such results confirm that the RNN offers a more precise and dependable fit for the station’s dataset. The web platform also effectively visualizes the model outputs, providing a dynamic and interactive 24-month forecast view that supports early warning efforts and informed decision-making for regional authorities and stakeholders.

Evaluasi Model XGBoost untuk Prediksi dan Klasifikasi Curah Hujan Menggunakan Data BMKG dan OpenWeather API Syah, Muhammad Saori Isjayan; Nardi; Rachmawardani, Agustina
Journal of Computation Physics and Earth Science (JoCPES) Vol 5 No 1 (2025): Journal of Computation Physics and Earth Science
Publisher : Yayasan Kita Menulis - JoCPES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63581/JoCPES.v5i1.03

Indonesia, situated between two continents and two oceans, experiences significant climate variability, with rainfall patterns shaped by geographical and topographical factors, as well as phenomena like the El Niño Southern Oscillation (ENSO). Accurate rainfall forecasting plays a critical role in disaster mitigation, agricultural planning, and water resource management. This study focuses on developing a rainfall prediction and classification model using the Extreme Gradient Boosting (XGBoost) algorithm. The model leverages historical rainfall data from the Indonesian Meteorological, Climatological, and Geophysical Agency (BMKG) and real-time data from the OpenWeather API. The output includes rainfall trend graphs and classification of rainfall intensity into categories such as light, moderate, or heavy. Model performance is assessed through metrics like accuracy, precision, RMS (Root Mean Square), and RMSE (Root Mean Square Error). This research highlights the integration of historical and real-time data for weather forecasting and demonstrates the application of advanced machine learning techniques like XGBoost to build robust and precise prediction models. The findings are expected to offer practical insights for disaster risk reduction, agricultural strategy planning, and effective water resource management.

Desain Ulang Antarmuka Pengguna dan Pengalaman dengan Peningkatan Identitas Merek untuk Situs Web STMKG melalui Implementasi WordPress Aji, Tonny Wahyu; Yasir, Ahmad Meijlan; Nardi; Sorfian; Rachmawardani, Agustina; Jehadun, Marianus Carol; Wastumirad, Adi Widiatmoko; Trihadi, Edward
Journal of Computation Physics and Earth Science (JoCPES) Vol 5 No 1 (2025): Journal of Computation Physics and Earth Science
Publisher : Yayasan Kita Menulis - JoCPES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63581/JoCPES.v5i1.15

This paper presents the redesign, rebuild, and rebranding of the official website of Sekolah Tinggi Meteorologi Klimatologi dan Geofisika (STMKG) using the WordPress content management system. The project aimed to modernize the institution’s digital presence by enhancing layout consistency, mobile responsiveness, and brand identity. A content audit was conducted to reorganize fragmented navigation and outdated information. The entire development was executed directly within WordPress using Elementor, enabling rapid prototyping without external wireframing tools. Key improvements include structured program sections, a modern news layout, and a standardized footer, all designed in line with STMKG’s visual identity. Performance optimization—though not the primary focus—involved basic caching, compression, and lazy loading, with assessments via GTmetrix indicating areas for future improvement. The project, completed by a sixth-semester cadet, highlights the feasibility of student-led web transformation initiatives within academic institutions. Positive stakeholder feedback confirmed improvements in usability, clarity, and institutional credibility. This work demonstrates the practical application of accessible web technologies to deliver scalable, branded, and user-centered digital solutions in educational settings.

Design and Development of IoT-Enabled Portable Device for Multiparameter Air Quality Monitoring ADINARA, DERBY BRYLIAN; RACHMAWARDANI, AGUSTINA; WASTUMIRAD, ADI WIDIATMOKO; RUSANTO, BENYAMIN HERYANTO; PRASETYO, DWI INDRA; KURNIAWAN, HANIF; HANI, ABDUL MANAF
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 4: Published November 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i4.339

The limitations of Indonesia's air quality monitoring infrastructure have prompted research to develop portable Internet of Things (IoT)-based monitoring devices. The system is designed using ESP32 and Arduino Uno integrated with MQ136 (SO2), MQ131 (NO2), MiCS-5524 (CO), TGS-2611 (CH4), Gravity-0460 (PM), and Gravity-0321 (O3) sensors. Data is converted into AQI values and displayed via LCD, Telegram, and website. The device is equipped with an early warning system that includes a buzzer, a website pop-up, and Telegram messages. Field testing results over 24 hours at POS KU Cibeureum recorded peak concentrations of PM2.5 (19 μg/m³), PM10 (58 μg/m³), NO₂ (1.375 ppb), CO (238 ppb), SO₂ (0.74 ppb), and O₃ (45 ppb). The device can be operated portably with the following dimensions: enclosure I, 20×20 cm; enclosure II, 7×12 cm; control panel box, 30×40 cm (pre-assembled) and 100×180 cm (post-assembled). The device has proven effective as an adaptive monitoring solution for residential areas surrounding industrial zones.

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