Estimation of evapotranspiration for rice production in tropical countries | |
| Author | Rashid, Abdur |
| Call Number | AIT Thesis no. 870 |
| Subject(s) | Rice Plants--Water requirements Plants--Transpiration Evapotranspiration |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of t he Asian Institute of Technology, Bangkok, Thailand . |
| Publisher | Asian Institute of Technology |
| Abstract | The object of this study was to examine the applicability of the most commonly used formulas namely Blaney-Criddle, Blaney-Morin, Thornthwaite, Hargreaves, Lowry-Johnson and Penman toward estimation of evapotranspiration for rice cultivation in the tropical regions. All these formulas have been developed in the western countries under climatological conditions appreciably different from those in the tropics. Computed evapotranspiration results obtained from using each of these formulas were checked with actually observed field data. From this study, it could be possible to draw the conclusion that no one of these formulas is just applicable in its original form in the tropical regions without some kind of modification. For example, Blaney-Morin and Penman formulas were found to provide underestimation of evapotranspiration in some tropical countries from where data were available. In such a condition some correction factors have been introduced to all these formulas which taking into account of the factors like humidity and stage of growth are found to improve the formulas significantly for giving better results. |
| Year | 1976 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Okamoto, Masami |
| Examination Committee(s) | Selvalingam, Selvadore ;Nir, Dov |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1976 |