Rajani et al. (2026) Integrated Hydrological Modelling in a Semi-Arid Irrigated Region of Karnataka

Identification

• Journal: Lecture notes in civil engineering
• Year: 2026
• Date: 2026-01-01
• Authors: Kelli Rajani, Mohansing Rajaput, B. M. Dodamani
• DOI: 10.1007/978-981-95-3775-4_10

Research Groups

Department of Water Resources and Ocean Engineering, National Institute of Technology Karnataka, Surathkal, India.

Short Summary

This study employed the integrated hydrological model ParFlow to simulate water movement in an irrigated semi-arid region of Karnataka, India, revealing significant spatial and temporal variations in saturation and terrain-driven preferential groundwater flow paths.

Objective

• To assess spatial and temporal variations in saturation and groundwater velocity within an irrigated agricultural area in a semi-arid region of Karnataka, India, using an integrated hydrological model.

Study Configuration

• Spatial Scale: An irrigated agricultural area in the semi-arid region of Karnataka, India, modeled at fine spatial resolution.
• Temporal Scale: Modeled at fine temporal resolution.

Methodology and Data

• Models used: ParFlow (integrated hydrological model simulating variably saturated subsurface and overland flow).
• Data sources: Not explicitly detailed in the provided text, but implied by model inputs like atmospheric forcing.

Main Results

• The simulation revealed significant differences in saturation across various land units within the study area.
• Terrain-driven preferential flow paths for groundwater were identified.
• The study demonstrated the effectiveness of integrated hydrological modeling in understanding complex groundwater behavior in semi-arid, irrigated regions.

Contributions

• Demonstrated the application and value of an integrated hydrological model (ParFlow) in a data-scarce and hydrologically complex semi-arid irrigated region of Karnataka, India.
• Provided insights into the spatial and temporal dynamics of saturation and groundwater flow, which are crucial for informed water resource planning and management in such challenging environments.
• Highlighted the importance of integrated modeling approaches over traditional modular models for capturing surface-subsurface interactions.

Funding

No funding information was provided in the paper text.

Citation

@article{Rajani2026Integrated,
  author = {Rajani, Kelli and Rajaput, Mohansing and Dodamani, B. M.},
  title = {Integrated Hydrological Modelling in a Semi-Arid Irrigated Region of Karnataka},
  journal = {Lecture notes in civil engineering},
  year = {2026},
  doi = {10.1007/978-981-95-3775-4_10},
  url = {https://doi.org/10.1007/978-981-95-3775-4_10}
}