Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment

The coupling of remote sensing technology and crop growth models represents a promising approach to support crop yield prediction and irrigation management. In this study, five vegetation indices were derived from the Copernicus-Sentinel 2 satellite to investigate their performance monitoring winter...

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Autores principales:	Marie Therese Abi Saab, Razane El Alam, Ihab Jomaa, Sleiman Skaf, Salim Fahed, Rossella Albrizio, Mladen Todorovic
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	crop models winter wheat irrigation Sentinel 2 vegetation indices canopy cover Agriculture S
Acceso en línea:	https://doaj.org/article/69c2272a3f2e4108a073db6d04013173
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spelling	oai:doaj.org-article:69c2272a3f2e4108a073db6d040131732021-11-25T16:09:28ZCoupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment10.3390/agronomy111122652073-4395https://doaj.org/article/69c2272a3f2e4108a073db6d040131732021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2265https://doaj.org/toc/2073-4395The coupling of remote sensing technology and crop growth models represents a promising approach to support crop yield prediction and irrigation management. In this study, five vegetation indices were derived from the Copernicus-Sentinel 2 satellite to investigate their performance monitoring winter wheat growth in a Mediterranean environment in Lebanon’s Bekaa Valley. Among those indices, the fraction of canopy cover was integrated into the AquaCrop model to simulate biomass and yield of wheat grown under rainfed conditions and fully irrigated regimes. The experiment was conducted during three consecutive growing seasons (from 2017 to 2019), characterized by different precipitation patterns. The AquaCrop model was calibrated and validated for different water regimes, and its performance was tested when coupled with remote sensing canopy cover. The results showed a good fit between measured canopy cover and Leaf Area Index (LAI) data and those derived from Sentinel 2 images. The R<sup>2</sup> coefficient was 0.79 for canopy cover and 0.77 for LAI. Moreover, the regressions were fitted to relate biomass with Sentinel 2 vegetation indices. In descending order of R<sup>2</sup>, the indices were ranked: Fractional Vegetation Cover (FVC), LAI, the fraction of Absorbed Photosynthetically Active Radiation (fAPAR), the Normalized Difference Vegetation Index (NDVI), and the Enhanced Vegetation Index (EVI). Notably, FVC and LAI were highly correlated with biomass. The results of the AquaCrop calibration showed that the modeling efficiency values, NSE, were 0.99 for well-watered treatments and 0.95 for rainfed conditions, confirming the goodness of fit between measured and simulated values. The validation results confirmed that the simulated yield varied from 2.59 to 5.36 t ha<sup>−1</sup>, while the measured yield varied from 3.08 to 5.63 t ha<sup>−1</sup> for full irrigation and rainfed treatments. After integrating the canopy cover into AquaCrop, the % of deviation of simulated and measured variables was reduced. The Root Mean Square Error (RMSE) for yield ranged between 0.08 and 0.69 t ha<sup>−1</sup> before coupling and between 0.04 and 0.42 t ha<sup>−1</sup> after integration. This result confirmed that the presented integration framework represents a promising method to improve the prediction of wheat crop growth in Mediterranean areas. Further studies are needed before being applied on a larger scale.Marie Therese Abi SaabRazane El AlamIhab JomaaSleiman SkafSalim FahedRossella AlbrizioMladen TodorovicMDPI AGarticlecrop modelswinter wheatirrigationSentinel 2vegetation indicescanopy coverAgricultureSENAgronomy, Vol 11, Iss 2265, p 2265 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	crop models winter wheat irrigation Sentinel 2 vegetation indices canopy cover Agriculture S
spellingShingle	crop models winter wheat irrigation Sentinel 2 vegetation indices canopy cover Agriculture S Marie Therese Abi Saab Razane El Alam Ihab Jomaa Sleiman Skaf Salim Fahed Rossella Albrizio Mladen Todorovic Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
description	The coupling of remote sensing technology and crop growth models represents a promising approach to support crop yield prediction and irrigation management. In this study, five vegetation indices were derived from the Copernicus-Sentinel 2 satellite to investigate their performance monitoring winter wheat growth in a Mediterranean environment in Lebanon’s Bekaa Valley. Among those indices, the fraction of canopy cover was integrated into the AquaCrop model to simulate biomass and yield of wheat grown under rainfed conditions and fully irrigated regimes. The experiment was conducted during three consecutive growing seasons (from 2017 to 2019), characterized by different precipitation patterns. The AquaCrop model was calibrated and validated for different water regimes, and its performance was tested when coupled with remote sensing canopy cover. The results showed a good fit between measured canopy cover and Leaf Area Index (LAI) data and those derived from Sentinel 2 images. The R<sup>2</sup> coefficient was 0.79 for canopy cover and 0.77 for LAI. Moreover, the regressions were fitted to relate biomass with Sentinel 2 vegetation indices. In descending order of R<sup>2</sup>, the indices were ranked: Fractional Vegetation Cover (FVC), LAI, the fraction of Absorbed Photosynthetically Active Radiation (fAPAR), the Normalized Difference Vegetation Index (NDVI), and the Enhanced Vegetation Index (EVI). Notably, FVC and LAI were highly correlated with biomass. The results of the AquaCrop calibration showed that the modeling efficiency values, NSE, were 0.99 for well-watered treatments and 0.95 for rainfed conditions, confirming the goodness of fit between measured and simulated values. The validation results confirmed that the simulated yield varied from 2.59 to 5.36 t ha<sup>−1</sup>, while the measured yield varied from 3.08 to 5.63 t ha<sup>−1</sup> for full irrigation and rainfed treatments. After integrating the canopy cover into AquaCrop, the % of deviation of simulated and measured variables was reduced. The Root Mean Square Error (RMSE) for yield ranged between 0.08 and 0.69 t ha<sup>−1</sup> before coupling and between 0.04 and 0.42 t ha<sup>−1</sup> after integration. This result confirmed that the presented integration framework represents a promising method to improve the prediction of wheat crop growth in Mediterranean areas. Further studies are needed before being applied on a larger scale.
format	article
author	Marie Therese Abi Saab Razane El Alam Ihab Jomaa Sleiman Skaf Salim Fahed Rossella Albrizio Mladen Todorovic
author_facet	Marie Therese Abi Saab Razane El Alam Ihab Jomaa Sleiman Skaf Salim Fahed Rossella Albrizio Mladen Todorovic
author_sort	Marie Therese Abi Saab
title	Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
title_short	Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
title_full	Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
title_fullStr	Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
title_full_unstemmed	Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment
title_sort	coupling remote sensing data and aquacrop model for simulation of winter wheat growth under rainfed and irrigated conditions in a mediterranean environment
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/69c2272a3f2e4108a073db6d04013173
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Coupling Remote Sensing Data and AquaCrop Model for Simulation of Winter Wheat Growth under Rainfed and Irrigated Conditions in a Mediterranean Environment

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