Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin
The intensity of agricultural activities and the characteristics of water consumption affect the hydrological processes of inland river basins in Central Asia. The crop water requirements and water productivity are different between the Amu Darya and Syr Darya river basins due to the different water...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/14/2/249 |
| _version_ | 1827663055033466880 |
|---|---|
| author | Zhibin Liu Tie Liu Yue Huang Yangchao Duan Xiaohui Pan Wei Wang |
| author_facet | Zhibin Liu Tie Liu Yue Huang Yangchao Duan Xiaohui Pan Wei Wang |
| author_sort | Zhibin Liu |
| collection | DOAJ |
| description | The intensity of agricultural activities and the characteristics of water consumption affect the hydrological processes of inland river basins in Central Asia. The crop water requirements and water productivity are different between the Amu Darya and Syr Darya river basins due to the different water resource development and utilization policies of Uzbekistan and Kazakhstan, which have resulted in more severe agricultural water consumption of the Amu Darya delta than the Syr Darya delta, and the differences in the surface runoff are injected into the Aral Sea. To reveal the difference in water resource dissipation, water productivity, and its influencing factors between the two basins, this study selected the irrigation areas of Amu Darya delta (IAAD) and Syr Darya delta (IASD) as typical examples; the actual evapotranspiration (ETa) was retrieved by using the modified surface energy balance algorithm for land model (SEBAL) based on high spatial resolution Landsat images from 2000 to 2020. Land use and cover change (LUCC) and streamflow data were obtained to analyze the reasons for the spatio-temporal heterogeneity of regional ETa. The water productivity of typical crops in two irrigation areas was compared and combined with statistical data. The results indicate that: (1) the ETa simulated by the SEBAL model matched the crop evapotranspiration (ETc) calculated by the Penman–Monteith method and ground-measured data well, with all the correlation coefficients higher than 0.7. (2) In IAAD, the average ETa was 1150 mm, and the ETa had shown a decreasing trend; for the IASD, the average ETa was 800 mm. The ETa showed an increasing trend with low stability due to a large amount of developable cultivated land. The change of cultivated land dominated the spatio-temporal characteristics of ETa in the two irrigation areas (3). Combined with high spatial resolution ETa inversion results, the water productivity of cotton and rice in IAAD was significantly lower than in IASD, and wheat was not significantly different, but all were far lower than the international average. This study can provide useful information for agricultural water management in the Aral Sea region. |
| first_indexed | 2024-03-10T00:37:26Z |
| format | Article |
| id | doaj.art-9403b8c6b0714d14a6a88a5ce9b18ce6 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T00:37:26Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-9403b8c6b0714d14a6a88a5ce9b18ce62023-11-23T15:14:29ZengMDPI AGRemote Sensing2072-42922022-01-0114224910.3390/rs14020249Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea BasinZhibin Liu0Tie Liu1Yue Huang2Yangchao Duan3Xiaohui Pan4Wei Wang5State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaBinjiang College, Nanjing University of Information Science & Technology, Wuxi 214105, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaThe intensity of agricultural activities and the characteristics of water consumption affect the hydrological processes of inland river basins in Central Asia. The crop water requirements and water productivity are different between the Amu Darya and Syr Darya river basins due to the different water resource development and utilization policies of Uzbekistan and Kazakhstan, which have resulted in more severe agricultural water consumption of the Amu Darya delta than the Syr Darya delta, and the differences in the surface runoff are injected into the Aral Sea. To reveal the difference in water resource dissipation, water productivity, and its influencing factors between the two basins, this study selected the irrigation areas of Amu Darya delta (IAAD) and Syr Darya delta (IASD) as typical examples; the actual evapotranspiration (ETa) was retrieved by using the modified surface energy balance algorithm for land model (SEBAL) based on high spatial resolution Landsat images from 2000 to 2020. Land use and cover change (LUCC) and streamflow data were obtained to analyze the reasons for the spatio-temporal heterogeneity of regional ETa. The water productivity of typical crops in two irrigation areas was compared and combined with statistical data. The results indicate that: (1) the ETa simulated by the SEBAL model matched the crop evapotranspiration (ETc) calculated by the Penman–Monteith method and ground-measured data well, with all the correlation coefficients higher than 0.7. (2) In IAAD, the average ETa was 1150 mm, and the ETa had shown a decreasing trend; for the IASD, the average ETa was 800 mm. The ETa showed an increasing trend with low stability due to a large amount of developable cultivated land. The change of cultivated land dominated the spatio-temporal characteristics of ETa in the two irrigation areas (3). Combined with high spatial resolution ETa inversion results, the water productivity of cotton and rice in IAAD was significantly lower than in IASD, and wheat was not significantly different, but all were far lower than the international average. This study can provide useful information for agricultural water management in the Aral Sea region.https://www.mdpi.com/2072-4292/14/2/249surface energy balance algorithm for land (SEBAL)actual evapotranspirationagricultural water consumptionthe Aral Seathe FAO Penman–Monteith equation |
| spellingShingle | Zhibin Liu Tie Liu Yue Huang Yangchao Duan Xiaohui Pan Wei Wang Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin Remote Sensing surface energy balance algorithm for land (SEBAL) actual evapotranspiration agricultural water consumption the Aral Sea the FAO Penman–Monteith equation |
| title | Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin |
| title_full | Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin |
| title_fullStr | Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin |
| title_full_unstemmed | Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin |
| title_short | Comparison of Crop Evapotranspiration and Water Productivity of Typical Delta Irrigation Areas in Aral Sea Basin |
| title_sort | comparison of crop evapotranspiration and water productivity of typical delta irrigation areas in aral sea basin |
| topic | surface energy balance algorithm for land (SEBAL) actual evapotranspiration agricultural water consumption the Aral Sea the FAO Penman–Monteith equation |
| url | https://www.mdpi.com/2072-4292/14/2/249 |
| work_keys_str_mv | AT zhibinliu comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin AT tieliu comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin AT yuehuang comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin AT yangchaoduan comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin AT xiaohuipan comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin AT weiwang comparisonofcropevapotranspirationandwaterproductivityoftypicaldeltairrigationareasinaralseabasin |