Awad et al. (2025) Assessment of Reference Evapotranspiration by Mass Transfer-Based Methods for Efficient Management of Irrigation Water in the Nile Delta.

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Annals of Agricultural Science Moshtohor
• Year: 2025
• Date: 2025-12-29
• Authors: Mahmoued I. Awad, Abousrie A. Farag, Harby Mostafa
• DOI: 10.21608/assjm.2025.403580.1383

Research Groups

Not explicitly mentioned in the paper text.

Short Summary

This study evaluates four mass-transfer models for estimating daily reference evapotranspiration (ETo) in the Nile Delta against the FAO-56 standard, identifying the Penman mass-transfer model as the most accurate and a suitable proxy for water-smart irrigation.

Objective

• To evaluate the performance of four mass transfer-based models for estimating daily reference evapotranspiration (ETo) in the Nile Delta, using the FAO-56 method as a reference, to identify practical estimators for enhanced irrigation efficiency.

Study Configuration

• Spatial Scale: Nile Delta
• Temporal Scale: Daily meteorological data for 40 consecutive years (1985 to 2024)

Methodology and Data

• Models used: Four mass transfer-based models (Penman, WMO, Mahringer, Dalton) evaluated against the FAO-56 method (reference standard).
• Data sources: Daily meteorological data (collected over 40 years).

Main Results

• The Penman mass-transfer model showed the best agreement with FAO-56, with a root mean square error (RMSE) of 1.46 mm day⁻¹, a mean absolute error (MAE) of 1.26 mm, a mean bias error (MBE) of 1.03 mm, a coefficient of determination (R²) of 0.86, and a regression slope of 1.03.
• Penman model exhibited an average overestimation of 3% compared to FAO-56, making it an excellent proxy with negligible adjustments for irrigation scheduling.
• WMO and Mahringer models were moderately acceptable alternatives but showed significant overestimation, particularly at high ETo values.
• The Dalton model displayed extreme bias and inconsistency, often doubling ETo values relative to FAO-56, which could lead to excessive irrigation and potentially waste as much as 80% more water.

Contributions

• Provides a comprehensive local evaluation of mass-transfer ETo models for the Nile Delta, identifying the most suitable alternatives to the data-intensive FAO-56 method.
• Establishes the Penman mass-transfer model as a reliable and efficient proxy for FAO-56 ETo in arid regions, enabling precise irrigation scheduling and water conservation.
• Quantifies the performance metrics and potential water waste associated with various mass-transfer models, offering critical insights for water resource management.

Funding

Not explicitly mentioned in the paper text.

Citation

@article{Awad2025Assessment,
  author = {Awad, Mahmoued I. and Farag, Abousrie A. and Mostafa, Harby},
  title = {Assessment of Reference Evapotranspiration by Mass Transfer-Based Methods for Efficient Management of Irrigation Water in the Nile Delta.},
  journal = {Annals of Agricultural Science Moshtohor},
  year = {2025},
  doi = {10.21608/assjm.2025.403580.1383},
  url = {https://doi.org/10.21608/assjm.2025.403580.1383}
}