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July 26, 2026Agricultural Water ManagementOpen Access

An integrated satellite remote sensing approach for mapping field-scale irrigation dynamics to support water management in highly regulated semi-arid catchments

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Authors

JMJackline W. MuturiSMSayantan MajumdarCNChristopher E. Ndehedehe

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Overview

Randomized trial maps irrigation dynamics in semi-arid catchments, indicating effective water management support.

Key Points

  • This study aims to monitor and quantify the extent of irrigated croplands and validate a satellite-based detection method for water management.
  • Applied a thresholding approach using reference evapotranspiration and enhanced vegetation index.
  • Analyzed data from the Namoi catchment between 2019 and 2025.
  • Validated approach across 40 fields, assessing accuracy and sensitivity.
  • Identified significant annual variability in irrigated areas, concentrated in central and south-eastern regions.
  • Achieved moderate accuracy (61.4%) and specificity (79.9%), but low sensitivity (38%) and weak classification agreement (Kappa = 0.19).
  • Bootstrap analysis indicated substantial uncertainty in irrigated area estimates due to threshold selection.

Cite This Study

Muturi et al. (2026) studied this question.

synapsesocial.com/papers/6a65a61ad3aea3239cd77977https://doi.org/10.1016/j.agwat.2026.110653
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