Sakkaew et al. (2026) Effects of Climate Change on Streamflow of Upper Lam Nam Chi and Lam Saphung Subwatershed Using SWAT Model

Identification

• Journal: Environment and Natural Resources Journal
• Year: 2026
• Date: 2026-09-08
• Authors: Chawakon Sakkaew, Supattra Thueksathit, Patchares Chacuttrikul
• DOI: 10.32526/ennrj/24/20250322

Research Groups

• Department of Conservation, Faculty of Forestry, Kasetsart University, Bangkok, Thailand
• Thai Meteorological Department
• Royal Irrigation Department
• Department of Land Development, Thailand

Short Summary

This study evaluated the impact of climate change on streamflow in the upper Lam Nam Chi and Lam Saphung subwatershed using the Soil and Water Assessment Tool (SWAT) model. The results showed that climate change would increase annual streamflow under both RCP4.5 and RCP8.5 scenarios, with a notable increase in the long-term scenario without measures or policies for GHG emission control.

Objective

• Investigate the effects of climate change on streamflow in the upper Lam Nam Chi and Lam Saphung subwatershed using the SWAT model under RCP4.5 and RCP8.5 scenarios.
• Assess the changes in monthly streamflow patterns and their implications for water management.

Study Configuration

• Spatial Scale: Upper Lam Nam Chi and Lam Saphung Subwatershed, Thailand
• Temporal Scale: 2012-2022 (current situation), 2041-2060 (near-term), 2061-2080 (medium-term), and 2081-2100 (long-term)

Methodology and Data

• Models used: Soil and Water Assessment Tool (SWAT) model
• Data sources:
  • Meteorological data from the Thai Meteorological Department
  • Hydrological data from the Royal Irrigation Department
  • Land use data from the Department of Land Development, Thailand

Main Results

• The average annual streamflow in the upper Lam Nam Chi and Lam Saphung subwatershed was 856.40 million cubic meters per year (MCM/yr) during 2012-2022.
• Climate change under RCP4.5 and RCP8.5 scenarios would increase annual streamflow, with a notable increase in the long-term scenario without measures or policies for GHG emission control.
• Shifts were observed in the months of maximum and minimum streamflow.

Contributions

• This study provides valuable insights into the impacts of climate change on streamflow in the upper Lam Nam Chi and Lam Saphung subwatershed, which can inform water management decisions and disaster mitigation plans.
• The findings highlight the importance of considering climate change projections in water resources planning and management.

Funding

• This research was funded by [insert funding agencies or projects].

Citation

@article{Sakkaew2026Effects,
  author = {Sakkaew, Chawakon and Thueksathit, Supattra and Chacuttrikul, Patchares},
  title = {Effects of Climate Change on Streamflow of Upper Lam Nam Chi and Lam Saphung Subwatershed Using SWAT Model},
  journal = {Environment and Natural Resources Journal},
  year = {2026},
  doi = {10.32526/ennrj/24/20250322},
  url = {https://doi.org/10.32526/ennrj/24/20250322}
}