Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin
Determining the actual evapotranspiration value and analyzing its temporal trend is essential for optimal water resources management in a basin. In the present paper, the actual evapotranspiration time series is simulated and its trend is analyzed according to the trend of climatic variables and lan...
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| Format: | Article |
| Language: | fas |
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Isfahan University of Technology
2022-12-01
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| Series: | علوم آب و خاک |
| Subjects: | |
| Online Access: | http://jstnar.iut.ac.ir/article-1-4092-en.html |
| _version_ | 1811196345025822720 |
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| author | H. Ahmadzadeh A. Fakheri Fard mohammad Ali ghorbani M. Tajrishy |
| author_facet | H. Ahmadzadeh A. Fakheri Fard mohammad Ali ghorbani M. Tajrishy |
| author_sort | H. Ahmadzadeh |
| collection | DOAJ |
| description | Determining the actual evapotranspiration value and analyzing its temporal trend is essential for optimal water resources management in a basin. In the present paper, the actual evapotranspiration time series is simulated and its trend is analyzed according to the trend of climatic variables and land use in the Ajichi basin during the period of 2015-1987. The comprehensive SWAT model was set up, calibrated, and validated for the Ajichi basin. Also, the average of simulated actual evapotranspiration of crops (in wet years) was compared with similar values in the National Water Document. The results of the Mann-Kendall trend test showed that the annual rainfall in most meteorological stations had a decreasing trend and the rainfall trend in the ten stations decreased significantly. While the annual maximum temperature at all stations and the annual minimum temperature in most of them have significantly increased. Investigation of land use maps illustrated that the irrigated land area of the basin has increased by a 39% during the study period. According the study's results, the potential evapotranspiration of the basin has had a significant increasing trend with a rate of 2.54 mm per year. The results indicated that despite the increasing trend of potential evapotranspiration and irrigated land area, the actual evapotranspiration of the basin had a significant decreasing trend with a rate of 2.2 mm per year due to the decrease in rainfall. |
| first_indexed | 2024-04-12T00:56:36Z |
| format | Article |
| id | doaj.art-4b95384c39a44e2094934e971a0dd3fc |
| institution | Directory Open Access Journal |
| issn | 2476-3594 2476-5554 |
| language | fas |
| last_indexed | 2024-04-12T00:56:36Z |
| publishDate | 2022-12-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | علوم آب و خاک |
| spelling | doaj.art-4b95384c39a44e2094934e971a0dd3fc2022-12-22T03:54:35ZfasIsfahan University of Technologyعلوم آب و خاک2476-35942476-55542022-12-012631534Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi BasinH. Ahmadzadeh0A. Fakheri Fard1mohammad Ali ghorbani2M. Tajrishy3 Tabriz University Tabriz University Tabriz University sharif university Determining the actual evapotranspiration value and analyzing its temporal trend is essential for optimal water resources management in a basin. In the present paper, the actual evapotranspiration time series is simulated and its trend is analyzed according to the trend of climatic variables and land use in the Ajichi basin during the period of 2015-1987. The comprehensive SWAT model was set up, calibrated, and validated for the Ajichi basin. Also, the average of simulated actual evapotranspiration of crops (in wet years) was compared with similar values in the National Water Document. The results of the Mann-Kendall trend test showed that the annual rainfall in most meteorological stations had a decreasing trend and the rainfall trend in the ten stations decreased significantly. While the annual maximum temperature at all stations and the annual minimum temperature in most of them have significantly increased. Investigation of land use maps illustrated that the irrigated land area of the basin has increased by a 39% during the study period. According the study's results, the potential evapotranspiration of the basin has had a significant increasing trend with a rate of 2.54 mm per year. The results indicated that despite the increasing trend of potential evapotranspiration and irrigated land area, the actual evapotranspiration of the basin had a significant decreasing trend with a rate of 2.2 mm per year due to the decrease in rainfall.http://jstnar.iut.ac.ir/article-1-4092-en.htmlclimate variablesland useactual evapotranspirationswattrend analysisajichi basin. |
| spellingShingle | H. Ahmadzadeh A. Fakheri Fard mohammad Ali ghorbani M. Tajrishy Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin علوم آب و خاک climate variables land use actual evapotranspiration swat trend analysis ajichi basin. |
| title | Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin |
| title_full | Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin |
| title_fullStr | Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin |
| title_full_unstemmed | Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin |
| title_short | Evaluation of the Simultaneous Effect of Changes of Climatic Variables and Land Use on the Actual Evapotranspiration Trend Using the SWAT Model in the Ajichi Basin |
| title_sort | evaluation of the simultaneous effect of changes of climatic variables and land use on the actual evapotranspiration trend using the swat model in the ajichi basin |
| topic | climate variables land use actual evapotranspiration swat trend analysis ajichi basin. |
| url | http://jstnar.iut.ac.ir/article-1-4092-en.html |
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