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Examining the Impact of the 120 Day Winds on Evapotranspiration Considering Irrigation in West Region of Afghanistan
http://hdl.handle.net/10076/14894
http://hdl.handle.net/10076/148944bd5810b-c7ea-4d46-aca6-d4570abcd74e
| 名前 / ファイル | ライセンス | アクション |
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2014M300.pdf (8.4 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||
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| 公開日 | 2015-11-18 | |||||||
| タイトル | ||||||||
| タイトル | Examining the Impact of the 120 Day Winds on Evapotranspiration Considering Irrigation in West Region of Afghanistan | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_46ec | |||||||
| 資源タイプ | thesis | |||||||
| 著者 |
HOMAYOON, GANJI
× HOMAYOON, GANJI
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Afghanistan, as a dry country, is characterized by extremes of climate and weather that can be counted as continental climate. Favorable climate for those areas that agricultural products form the firs source of income is important. Agriculture as a main source of income in Afghanistan has been facing challenges since decades. Water scarcity is the extreme challenges that threatening the country so far. Total available water is 75,000,000,000 m3of which 57,000,000,000 m3 is unused. This information shows that, still Afghanistan is not self-sufficient for its water needs. The spatial distribution of water availability is not equal in Afghanistan among the regions. The western region is the most exposed place on water shortage. Western region consist Farah, Ghour, Badghis and Herat provinces where is characterized with semi-arid climate that has low precipitation and high evaporation. Between all the factors which adversely affect the weather condition is strong wind. Strong winds are locally known as “120 day winds” usually begin in July and go on until September with a great force 7m/s. The prevailing winds come from the north at almost 7.5 m/s all summer. North winds occur 40-45 percent of the time in June-August and 30 % of the time in September. Peak gusts reached almost 25 m/s. The great impact of wind velocity is increasing evapotranspiration (ET) which can have profound implications for hydrologic processes and agricultural crop performance. In this study, by examining the impact of metrological factors on evaporation process, the relationship of the wind intensity with evaporation is examined using six common evaporation models with aim for discovering the best method for estimating the evapotranspiration which has the most accuracy and is adaptable in the area. Therefore, the Penman-Monteith and Hargreaves methods are confirmed the most accurate and adaptable methods for estimating the evapotranspiration in the west region. In regards to the weather conditions and geographical statues, the most potential places in terms of wetness and hotness factors is presented in Afghanistan. For this purpose, favorable areas where having high potential for Agriculture are indicated by a 2D map. Time-series reference evapotranspiration (ET0) data is analyzed for both windy and nonwindy seasons using the Penman?Monteith equation to determine seasonal differences in ET0. Therefore, ET0 is determined to be significantly influenced by the synergistic effect of wind velocity and vapor pressure deficit. The surrounding another provinces are investigated with aim for finding the difference from Herat in regards of the wind velocity. It’s confirmed that due to the large differentials of wind velocity between two provinces which are located mutually near, it’s difficult to characterize the areas where having the strong winds. By determining the hourly ET0 during the “120-Day Winds” and non-windy season, the wind velocity is found higher at daytime than the nighttime. Furthermore, the months June until September has been found as windy season which causes the higher daily evapotranspiration, almost more than 10 mm/day in west region. Hence, the crops which their growing season coincide with windy season, consume more water. Similarly, in a simulation case in which wind velocity is considered zero, the ET0 rate has been found two times lower. | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | Submitted to the Division of Environmental Science and Technology, In Partial Fulfillment of the Requirements For the Degree of Master of Science In the Graduate School of Bioresources University of Mie Mie Prefecture, Japan | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 16, 131, 6 | |||||||
| 書誌情報 |
発行日 2015-01-01 |
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| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 出版者 | ||||||||
| 出版者 | 三重大学 | |||||||
| 出版者（ヨミ） | ||||||||
| 値 | ミエダイガク | |||||||
| 修士論文指導教員 | ||||||||
| 寄与者識別子Scheme | WEKO | |||||||
| 寄与者識別子 | 26538 | |||||||
| 姓名 | 加治佐, 隆光 | |||||||
| 言語 | ja | |||||||
| 資源タイプ（三重大） | ||||||||
| 値 | Master's Thesis / 修士論文 | |||||||
