A5068639118- Climate variability and models
- Geophysics and Gravity Measurements
- Flood Risk Assessment and Management
- Precipitation Measurement and Analysis
- Hydrology and Watershed Management Studies
- Oceanographic and Atmospheric Processes
- Geological and Geophysical Studies
- Water and Land Management
- Groundwater and Isotope Geochemistry
- Hydrological Forecasting Using AI
- Groundwater and Watershed Analysis
- Tropical and Extratropical Cyclones Research
- Isotope Analysis in Ecology
- Hydrology and Drought Analysis
- Multimedia Learning Systems
- Data Mining and Machine Learning Applications
- Leaf Properties and Growth Measurement
- Meteorological Phenomena and Simulations
- Geophysical and Geoelectrical Methods
- Blockchain Technology in Education and Learning
- Soil Moisture and Remote Sensing
- Computational Physics and Python Applications
- Geotechnical and construction materials studies
- Mine drainage and remediation techniques
- Geochemistry and Elemental Analysis
Bandung Institute of Technology
2013-2024
Norsk Hydro (Germany)
2017
Kumamoto University
2013
Cross-equatorial northerly surge (CENS) is characterized by a strengthening of moist monsoon winds over south the South China Sea in western Maritime Continent. The CENS typically lasts few days boreal winter and frequently reported as crucial synoptic forcing heavy rainfall flood events northern Java Island. occurrence has been generally understood an extension cold (CS) coming from East Asia. However, out 117 identified last 42 years, only 59% were induced surges (CENS-CS). We further...
This study presents the complexity and sensitivity of chaotic system dynamics in case double pendulum. It applied detailed numerical analyses pendulum multiple computing platforms order to demonstrate behavior pendulums. The equations motion were derived from Euler-Lagrange formalism, capture system's dynamics, which is coupled nonlinearly. These solved numerically using efficient Runge-Kutta-Fehlberg method, implemented Python, R, GNU Octave, Julia, while runtimes memory usage extensively...
The impact of the MJO on extreme daily rainfall ( x ≥ c ), namely 95th extreme, is known by quantifying difference in probability during versus NDJFMA (△ P ) events. has four propagation characteristics. In this study, differences characteristics each type which are different from other. identification using a band-pass filter frequency against average Outgoing Longwave Radiation and certain criteria. identified according to criteria will be grouped based similarity types k-mean clustering...
Abstract Southeast Asia and Australia have historically suffered significant losses due to droughts. Understanding these droughts can serve as a foundation for mitigation strategies aimed at reducing the damages they cause. Meteorological drought indices, such Standardized Precipitation Index (SPI), offer valuable method quantifying severity frequency. This study employs monthly precipitation data from GPM_3IMERGM (0.1° x 0.1°) spanning 2000-2021 calculate SPI across different time scales: 3...
Abstract Bandung basin, particularly Cikapundung river is highly susceptible to recurrent flooding due its significant rainfall levels, making it one of the most flood-prone regions in Indonesia. These frequent floods have severe consequences for Greater Bandung, administrative center West Java, disrupting infrastructure, public safety, and local economic activities. To effectively mitigate these risks, essential a comprehensive understanding flood hazard levels within basin. This study...
The seasonal water cycle features over the maritime continent were determined using sources from seven regions produced by global Rayleigh-type circulation model. model output was validated statistically to reproduce stable isotopes observed δ18O and δD content of precipitation at eight stations. explains Asian-Australian monsoon well demonstrates changes origin on basis three climatic patterns as a signature rainy dry season: (1) semi-annual pattern, are indicated raise vapor Indian Ocean...
The few previous studies of precipitation isotopes (δ 18 O and δD) in Indonesia, based on low spatial resolution observation datasets, have found several types patterns their seasonal variabilities.This study conducted high rainfall sampling investigated the temporal characteristics isotope Indonesia.Rainfall samples were collected weekly from 33 stations Indonesia.Cluster analysis showed that Indonesia could be divided into four variability δ O.The majority O, characterized by values dry...
Abstract Flooding represents around 32% of total disasters in Indonesia and disproportionately affects the poorest communities. The objective this study was to determine significant statistical differences, terms river catchment characteristics, between regions West Java that reported suffering from flood those did not. Catchment characteristics considered included various measures topography, land-use, soil-type, meteorology flow rates. comprises 154 level 9 HydroSHEDS sub-basin regions. We...
Abstract The Cilacap Regency-Central Java, is the largest agricultural area with a high level of drought vulnerability. This study aims to evaluate three indices in quantifying condition Regency and its application forecasting. that were used this are Standard Precipitation Index (SPI), Evapotranspiration (SPEI), Palmer Drought Severity (PDSI). comparison between SPI SPEI shows there no significant difference terms determining severity. should be when temperature more than 2°C 30 years. PDSI...
インドネシア海大陸(IMC)は熱帯地方にあって,多数の島と海から構成されている。この多数の陸と海の配置は,独特の天気や気候特徴を形成している。IMCでは,降水の安定同位体の変動を調べる様々な水文気象学的な研究が行われている。降水の安定同位体比(δ18O, δD)は,大気過程(例えば,降水量,気温,水循環)に関する情報を得るために使われる。国際原子力機構による全球降水同位体観測網は,1961年より世界的に月単位の降水同位体の観測を行っており,海洋研究開発機構ではIMCの降水同位体の変動をさらに理解するために,2001年より観測を開始した。降水の安定同位体の季節変動には,降水量と同位体比によって3つのタイプ,半年周期,反モンスーン,モンスーンがある。降水量と同位体比の月平均値には,負の相関(降水量効果)が認められた。降水の安定同位体比の経年変動ではエルニーニョ南方振動による影響,季節内変動ではマッデン・ジュリアン振動による影響が認められた。また,短期変動には雲タイプや凝結後のプロセスによる影響が認められた。
Majalaya, a small city to the south-east of Bandung, was hit by flood almost every year. From January June 2016, up 5 severe floods and 4 moderate have this city. Although it usually not last for long, but stream could be very rapid, thus high potential bring damage Starting from 2012, ITB through Weather Climate Prediction Laboratory (WCPL) has support Garda Caah (flood watcher society in Majalaya) with weather prediction system. In late 2015, also enhancing observation system installing...
Intraseasonal variability of precipitation over the Indonesian Maritime Continent (IMC) is related mainly to Madden–Julian oscillation (MJO). The MJO enhances and suppresses around IMC according its phase. This study examined relationship between stable isotope IMC. Observations simulation data from an circulation model colored moisture analysis (ICM/CMA) were used. Temporal analyses observed simulated showed that active stage, associated with a positive anomaly IMC, was correlated depletion...
This study examined the relationship between El Niño–Southern Oscillation (ENSO) and atmospheric water isotopes during wet season over Maritime Continent. The model data used were obtained by incorporating stable into general circulation analytical moisture transport models. These models to analyze climatological variables rainout processes from various sources that control isotopic variation. correlation simulated isotope ratios ENSO varied −0.31 0.75 with stronger most of Continent (|r| >...
The number of landslides events in Bandung ranked fourth Indonesia. landslide is affected not only by the geographical character, but also rainfall intensity and duration. Thus, information threshold triggering important to be obtained. This study aim determine South using data provided TRMM GPM satellites. satellite corrected ground-observation three sites. empirical method used this performs relationship between duration event curve obtained lowering regression line intensity-duration (ID)...
Abstract Diurnal variability of stable isotopes in precipitation and its controlling factors are poorly understood, especially the tropics. This study investigated diurnal rainfall observed at Bengkulu southern Sumatra, Indonesia. Rainfall samples were collected 6-h intervals from 1 December 2017 to 15 January 2018 for Year Maritime Continent (YMC-Sumatra 2017). The oxygen hydrogen isotopic compositions δ 18 O δH) rainwater varied –15.1%o –1.8%o –108.9%o –1.3%o, respectively, d-excess 1.9%o...
Sebagai ibu kota negara dan pusat berbagai kegiatan ekonomi, Jakarta terus mengalami pertumbuhan penduduk infrastruktur. Pembangunan ekonomi ini pun pergeseran ke wilayah pesisir utara Jakarta. Di sisi lain, perubahan iklim adalah permasalahan yang harus dihadapi secara global, termasuk Strategi pembangunan perlu mempertimbangkan aspek-aspek untuk mengurangi potensi dampak-dampak lingkungan akan terjadi. Makalah bertujuan menampilkan kondisi saat di daerah perubahannya masa datang. Informasi...
Abstract Rainfall is one of the most important hydrological parameters. Based on prediction rainfall, several plans related to rainfall can be carried out, including predicting start planting season based information beginning rainy and preparing cropping patterns. The purpose this study predict ten daily for 12 months from January December following year BMKG criteria. Modeling forecasting out regional in catchment Citarum-Majalaya water gauge using Singular Spectrum Analysis (SSA)...
This study presents the complexity and sensitivity of chaotic system dynamics in case double pendulum. It applied detailed numerical analyses pendulum multiple computing platforms order to demonstrate behavior pendulums. The equations motion were derived from Euler-Lagrange formalism, capture system's dynamics, which is coupled nonlinearly. These solved numerically using efficient Runge-Kutta-Fehlberg method, implemented Python, R, GNU Octave, Julia, while runtimes memory usage extensively...
Abstract Flood is a classic but complex issue in most regions of Indonesia. Nusantara, the future capital Indonesia, now undergoing construction site continues to experience flooding due high intensity rainfall. To overcome this challenge, identification flood points those areas needs be done. Digital Elevation Models (DEM) are important component modeling inundation data-sparse areas. High-accuracy DEMs have been found give better estimation availability such data very limited. Therefore,...
Abstract Global Subseasonal-to-Seasonal (S2S) precipitation forecast was known to bridge the gap between weather and seasonal forecast, can be utilized as supporting information for decision-making related hydrometeorological disaster mitigation activities. However, uncertainty in global models caused performance different across regions time periods. Therefore, it is important evaluate before utilizing prediction result any region. In this study, of probabilistic from Multi-model Ensemble...
Buku ini menyajikan pengantar yang sistematis dan mendalam mengenai dinamika fluida geofisika (Geophysical Fluid Dynamics, GFD), bidang ilmu mempelajari pergerakan di atmosfer lautan dalam skala besar. Fokus utama pembahasan mencakup dua faktor penting membedakan GFD dari mekanika klasik, yaitu pengaruh rotasi Bumi stratifikasi densitas fluida. Materi disusun secara bertahap, dimulai konsep dasar seperti persamaan Navier-Stokes kerangka rotasional, hingga fenomena lebih kompleks gelombang...