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Using UAV-thermal imaging to calculate crop water use and irrigation efficiency in a flood-irrigated pecan orchard

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  • Garcia-Vasquez, Ana Cristina
  • Mokari, Esmaiil
  • Samani, Zohrab
  • Fernald, Alexander

Abstract

Pecans are a major crop in New Mexico’s Lower Rio Grande Valley (LRGV) where about 30 % of pecans are produced in USA. Due to low amount of precipitation in the LRGV, pecans are highly depended on irrigation from surface and ground water. The area has gone through two decades of drought which has significantly reduced the availability of surface water. There is an urgent need for proper estimation of crop water use and irrigation scheduling to improve water use efficiency and productivity. The objective of this study is to extend a recently developed model for calculating real time pecan water use (ETa) from UAV-thermal imaging when the canopy cover is variable. The extended methodology was used to calculate ETa and seasonal irrigation efficiency. The calculated seasonal irrigation efficiency was compared with irrigation efficiency estimated by chloride tracing method. The results showed the proposed methodology can be used to calculate ETa and on-farm irrigation efficiency in the area when pecan canopy cover is changed.

Suggested Citation

  • Garcia-Vasquez, Ana Cristina & Mokari, Esmaiil & Samani, Zohrab & Fernald, Alexander, 2022. "Using UAV-thermal imaging to calculate crop water use and irrigation efficiency in a flood-irrigated pecan orchard," Agricultural Water Management, Elsevier, vol. 272(C).
    • Handle: RePEc:eee:agiwat:v:272:y:2022:i:c:s0378377422003717
    DOI: 10.1016/j.agwat.2022.107824
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    References listed on IDEAS

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    1. Wang, Junming & Sammis, Ted W. & Andales, Allan A. & Simmons, Luke J. & Gutschick, Vincent P. & Miller, David R., 2007. "Crop coefficients of open-canopy pecan orchards," Agricultural Water Management, Elsevier, vol. 88(1-3), pages 253-262, March.
    2. Samani, Zohrab & Bawazir, Salim & Skaggs, Rhonda & Longworth, John & Piñon, Aldo & Tran, Vien, 2011. "A simple irrigation scheduling approach for pecans," Agricultural Water Management, Elsevier, vol. 98(4), pages 661-664, February.
    3. Ahadi, Rasool & Samani, Zohrab & Skaggs, Rhonda, 2013. "Evaluating on-farm irrigation efficiency across the watershed: A case study of New Mexico's Lower Rio Grande Basin," Agricultural Water Management, Elsevier, vol. 124(C), pages 52-57.
    4. Mokari, Esmaiil & Samani, Zohrab & Heerema, Richard & Ward, Frank, 2021. "Evaluation of long-term climate change impact on the growing season and water use of mature pecan in Lower Rio Grande Valley," Agricultural Water Management, Elsevier, vol. 252(C).
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    1. Wei, Jiaxing & Dong, Weichen & Liu, Shaomin & Song, Lisheng & Zhou, Ji & Xu, Ziwei & Wang, Ziwei & Xu, Tongren & He, Xinlei & Sun, Jingwei, 2023. "Mapping super high resolution evapotranspiration in oasis-desert areas using UAV multi-sensor data," Agricultural Water Management, Elsevier, vol. 287(C).

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