Sharma et al. (2026) Optimization of Irrigation Requirement of Summer Moong Bean (Vigna radiata L.) under Changing Climatic Scenario of Junagadh District of Gujarat Using CROPWAT Model

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Identification

• Journal: International Journal of Environment and Climate Change
• Year: 2026
• Date: 2026-08-07
• Authors: Priya Sharma, R. M. Solanki, Gharsiram, Rajvee V. Kalariya, Femi G. Vala, Hardip S. Dabhi
• DOI: 10.9734/ijecc/2026/v16i85611

Research Groups

Not specified

Short Summary

This study utilizes the FAO CROPWAT 8.0 model to estimate water requirements and establish an optimized irrigation schedule for summer green gram in the Junagadh district of Gujarat. The results provide a precise irrigation framework to mitigate the constraints of high evaporative demand and limited rainfall in semi-arid environments.

Objective

• To estimate the crop water requirements and develop a stage-specific irrigation schedule for summer green gram (Vigna radiata L.) in the Junagadh district, Gujarat.

Study Configuration

• Spatial Scale: Junagadh district, Gujarat, India.
• Temporal Scale: 2024–2025 (Sowing date: 23 February).

Methodology and Data

• Models used: FAO CROPWAT 8.0.
• Data sources: Meteorological data (2024–2025), medium black clay soil characteristics, and crop-specific parameters.

Main Results

• Evapotranspiration: Reference evapotranspiration ($ET0$) ranged from 2.78 to 5.17 mm/day; crop evapotranspiration ($ETc$) peaked at 5.85 mm/day (58.50 mm/decade).
• Crop Coefficient: $K_c$ values increased from 0.20 (establishment) to a maximum of 1.18 (mid-season).
• Water Requirements: Total net irrigation requirement was 346.6 mm, and total gross irrigation requirement was 495.1 mm.
• Water Use: Actual crop water use was 270.5 mm, while potential crop water use was 270.8 mm.
• Efficiency: The simulated schedule resulted in 100% irrigation scheduling efficiency with negligible seasonal yield reduction.

Contributions

The study provides a quantitative basis for stage-specific irrigation scheduling for summer green gram in semi-arid regions, offering a method to optimize water allocation and maintain yields under high evaporative demand and specific soil conditions (medium black clay).

Funding

Not specified

Citation

@article{Sharma2026Optimization,
  author = {Sharma, Priya and Solanki, R. M. and Gharsiram and Kalariya, Rajvee V. and Vala, Femi G. and Dabhi, Hardip S.},
  title = {Optimization of Irrigation Requirement of Summer Moong Bean (Vigna radiata L.) under Changing Climatic Scenario of Junagadh District of Gujarat Using CROPWAT Model},
  journal = {International Journal of Environment and Climate Change},
  year = {2026},
  doi = {10.9734/ijecc/2026/v16i85611},
  url = {https://doi.org/10.9734/ijecc/2026/v16i85611}
}