| Author | Wimalathasan, Amirthalingam |
| Call Number | AIT Thesis no.AE-84-23 |
| Subject(s) | Evapotranspiration
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | The study was undertaken to estimate the crop coefficient for different growth stages of wet land rice in the dry season of Bangkok plain, Thailand 1 984. Eight microlysimeters
were used to measure the actual evapotranspiration for the first 26 days and then four of them were spared to measure the
transpiration. Reference evapotranspiration was measured by Class A pan. This experiment consists of three observations per day of pan, air, standi n g water and wet and dry temperatures, wind run, solar radition and pan evaporation.
The actual evapotranspiration, transpiration , pan
evaporation and reference pan evapotranspiration were 7.55mm/day, 4.94mm/day, 6.78mm/day and 5.04mm/day respectively. The ratios of
actual evapotranspiration and pan evaporation were 0.89, 1.22, 1.06 and the ratios of actual evapotranspiration and pan reference evpotranspiration were 1.37, 1.65 , 1.25 during
vegetative, reproductive and ripening phases. The transpiration / pan reference evapotranspiration ratio and leaf area index were
linearly related. A new relative humidity function was found to
estimate the daily mean relative humidity. |
| Year | 1984 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jensen, Jens Raunso
|
| Examination Committee(s) | Eppendorfer, W.H. ; Murty, V.V.N
|
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1984 |