Publications

  1. Sun Glint-Aware Restoration (SUGAR): a robust sun glint correction algorithm for UAV imagery to enhance monitoring of turbid coastal environments(Pak et al., 2025)
  2. Correction of systematic image misalignment in direct georeferencing of UAV multispectral imagery(Pak, Lin, et al., 2024)
  3. CoastalWQL: An Open-Source Tool for Drone-Based Mapping of Coastal Turbidity Using Push Broom Hyperspectral Imagery(Pak, Kieu, et al., 2024)
  4. Retrieval of total suspended solids concentration from hyperspectral sensing using hierarchical Bayesian model aggregation for optimal multiple band ratio analysis(Pak et al., 2023)
  5. Benchmarking of hierarchical bayesian model aggregation, xgboost and optimal band ratio analysis (OBRA) models for total suspended sediments retrieval from remote sensing(Pak et al., 2022)
  6. A framework for assessing the adequacy of Water Quality Index–Quantifying parameter sensitivity and uncertainties in missing values distribution(Pak, Chuah, Tan, et al., 2021)
  7. Effects of land use configuration, seasonality and point source on water quality in a tropical watershed: A case study of the Johor River Basin(Pak, Chuah, Yong, et al., 2021)

Co-authored publications

  1. A Comparative Study of Multi-Rotor Unmanned Aerial Vehicles (UAVs) with Spectral Sensors for Real-Time Turbidity Monitoring in the Coastal Environment(Trinh et al., 2024)
  2. UAV-based remote sensing of turbidity in coastal environment for regulatory monitoring and assessment(Kieu et al., 2023)
  3. A Framework for Survey Planning Using Portable Unmanned Aerial Vehicles (pUAVs) in Coastal Hydro-Environment(Trinh et al., 2022)

Thesis

  1. PhD Thesis - Remote sensing of coastal turbidity with unmanned aerial vehicle-borne multispectral and hyperspectral sensors in the coastal region of Singapore (Pak, 2024)
  2. Master Thesis - An assessment of river water quality : case study of Johor River basin, Malaysia (Pak, 2020)
  3. Bachelor Thesis - Investigating factors responsible for soil pH and its spatial variation in the Nee Soon Swamp Forest (Pak, 2018)

List of publications

Kieu, H. T., Pak, H. Y., Trinh, H. L., Pang, D. S. C., Khoo, E., & Law, A. W.-K. (2023). UAV-based remote sensing of turbidity in coastal environment for regulatory monitoring and assessment. Marine Pollution Bulletin, 196, 115482. https://doi.org/10.1016/j.marpolbul.2023.115482
Pak, H. Y. (2018). Investigating factors responsible for soil pH and its spatial variation in the nee soon swamp forest.
Pak, H. Y. (2020). An assessment of river water quality: Case study of johor river basin, malaysia. https://doi.org/10.32657/10356/145107
Pak, H. Y. (2024). Remote sensing of coastal turbidity with unmanned aerial vehicle-borne multispectral and hyperspectral sensors in the coastal region of singapore. https://doi.org/10.32657/10356/180742
Pak, H. Y., Chuah, C. J., Tan, M. L., Yong, E. L., & Snyder, S. A. (2021). A framework for assessing the adequacy of water quality index–quantifying parameter sensitivity and uncertainties in missing values distribution. Science of the Total Environment, 751, 141982. https://doi.org/10.1016/j.scitotenv.2020.141982
Pak, H. Y., Chuah, C. J., Yong, E. L., & Snyder, S. A. (2021). Effects of land use configuration, seasonality and point source on water quality in a tropical watershed: A case study of the johor river basin. Science of the Total Environment, 780, 146661. https://doi.org/10.1016/j.scitotenv.2021.146661
Pak, H. Y., Kieu, H. T., Lin, W., Khoo, E., & Law, A. W.-K. (2024). CoastalWQL: An open-source tool for drone-based mapping of coastal turbidity using push broom hyperspectral imagery. Remote Sensing, 16(4), 708. https://doi.org/10.3390/rs16040708
Pak, H. Y., Law, A. W.-K., & Lin, W. (2022). Benchmarking of hierarchical bayesian model aggregation, xgboost and optimal band ratio analysis (OBRA) models for total suspended sediments retrieval from remote sensing. https://doi.org/10.3850/IAHR-39WC2521716X2022procd
Pak, H. Y., Law, A. W.-K., & Lin, W. (2023). Retrieval of total suspended solids concentration from hyperspectral sensing using hierarchical bayesian model aggregation for optimal multiple band ratio analysis. Journal of Hydro-Environment Research, 46, 1–18. https://doi.org/10.1016/j.jher.2022.11.002
Pak, H. Y., Law, A. W.-K., Lin, W., & Khoo, E. (2025). Sun Glint-Aware Restoration (SUGAR): a robust sun glint correction algorithm for UAV imagery to enhance monitoring of turbid coastal environments. Environmental Monitoring and Assessment, 197(3). https://doi.org/10.1007/s10661-025-13702-6
Pak, H. Y., Lin, W., & Law, A. W.-K. (2024). Correction of systematic image misalignment in direct georeferencing of UAV multispectral imagery. International Journal of Remote Sensing, 1–23. https://doi.org/10.1080/01431161.2024.2440944
Trinh, H. L., Kieu, H. T., Pak, H. Y., Pang, D. S. C., Cokro, A. A., & Law, A. W.-K. (2022). A framework for survey planning using portable unmanned aerial vehicles (p UAVs) in coastal hydro-environment. Remote Sensing, 14(9), 2283. https://doi.org/10.3390/rs14092283
Trinh, H. L., Kieu, H. T., Pak, H. Y., Pang, D. S. C., Tham, W. W., Khoo, E., & Law, A. W.-K. (2024). A comparative study of multi-rotor unmanned aerial vehicles (UAVs) with spectral sensors for real-time turbidity monitoring in the coastal environment. Drones, 8(2), 52. https://doi.org/10.3390/drones8020052