Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration
Accurate estimation of crop evapotranspiration (ET) is a key factor in agricultural water management including irrigated agriculture. The objective of this study was to compare ET estimated from the satellite-based remote sensing METRIC model to in situ atmometer readings. Atmometer readings were re...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2017/3632501 |
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| author | Arturo Reyes-González Jeppe Kjaersgaard Todd Trooien Christopher Hay Laurent Ahiablame |
| author_facet | Arturo Reyes-González Jeppe Kjaersgaard Todd Trooien Christopher Hay Laurent Ahiablame |
| author_sort | Arturo Reyes-González |
| collection | DOAJ |
| description | Accurate estimation of crop evapotranspiration (ET) is a key factor in agricultural water management including irrigated agriculture. The objective of this study was to compare ET estimated from the satellite-based remote sensing METRIC model to in situ atmometer readings. Atmometer readings were recorded from three sites in eastern South Dakota every morning between 8:15 and 8:30 AM for the duration of the 2016 growing season. Seven corresponding clear sky images from Landsat 7 and Landsat 8 (Path 29, Row 29) were processed and used for comparison. Three corn fields in three sites were used to compare actual evapotranspiration (ETa). The results showed a good relationship between ETa estimated by the METRIC model (ETa-METRIC) and ETa estimated with atmometer (ETa-atm) (r2 = 0.87, index of agreement of 0.84, and RMSE = 0.65 mm day−1). However, ETa-atm values were consistently lower than ETa-METRIC values. The differences in daily ETa between the two methods increase with high wind speed values (>4 m s−1). Results from this study are useful for improving irrigation water management at local and field scales. |
| format | Article |
| id | doaj-art-7840ce374fce419393ed307487fee1fa |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Agronomy |
| spelling | doaj-art-7840ce374fce419393ed307487fee1fa2025-02-03T06:07:55ZengWileyInternational Journal of Agronomy1687-81591687-81672017-01-01201710.1155/2017/36325013632501Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual EvapotranspirationArturo Reyes-González0Jeppe Kjaersgaard1Todd Trooien2Christopher Hay3Laurent Ahiablame4Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USADepartment of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USADepartment of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USAIowa Soybean Association, Ankeny, IA, USADepartment of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USAAccurate estimation of crop evapotranspiration (ET) is a key factor in agricultural water management including irrigated agriculture. The objective of this study was to compare ET estimated from the satellite-based remote sensing METRIC model to in situ atmometer readings. Atmometer readings were recorded from three sites in eastern South Dakota every morning between 8:15 and 8:30 AM for the duration of the 2016 growing season. Seven corresponding clear sky images from Landsat 7 and Landsat 8 (Path 29, Row 29) were processed and used for comparison. Three corn fields in three sites were used to compare actual evapotranspiration (ETa). The results showed a good relationship between ETa estimated by the METRIC model (ETa-METRIC) and ETa estimated with atmometer (ETa-atm) (r2 = 0.87, index of agreement of 0.84, and RMSE = 0.65 mm day−1). However, ETa-atm values were consistently lower than ETa-METRIC values. The differences in daily ETa between the two methods increase with high wind speed values (>4 m s−1). Results from this study are useful for improving irrigation water management at local and field scales.http://dx.doi.org/10.1155/2017/3632501 |
| spellingShingle | Arturo Reyes-González Jeppe Kjaersgaard Todd Trooien Christopher Hay Laurent Ahiablame Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration International Journal of Agronomy |
| title | Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration |
| title_full | Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration |
| title_fullStr | Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration |
| title_full_unstemmed | Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration |
| title_short | Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration |
| title_sort | comparative analysis of metric model and atmometer methods for estimating actual evapotranspiration |
| url | http://dx.doi.org/10.1155/2017/3632501 |
| work_keys_str_mv | AT arturoreyesgonzalez comparativeanalysisofmetricmodelandatmometermethodsforestimatingactualevapotranspiration AT jeppekjaersgaard comparativeanalysisofmetricmodelandatmometermethodsforestimatingactualevapotranspiration AT toddtrooien comparativeanalysisofmetricmodelandatmometermethodsforestimatingactualevapotranspiration AT christopherhay comparativeanalysisofmetricmodelandatmometermethodsforestimatingactualevapotranspiration AT laurentahiablame comparativeanalysisofmetricmodelandatmometermethodsforestimatingactualevapotranspiration |