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Comparative of influences of light intensity and wind velocity on the evaporation rate of saturated soil surface |
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| รหัสดีโอไอ | |
| Creator | Tammasak Punsaensri |
| Title | Comparative of influences of light intensity and wind velocity on the evaporation rate of saturated soil surface |
| Contributor | Watcharapong Tachajapong |
| Publisher | Nakhon Pathom Rajabhat University |
| Publication Year | 2561 |
| Journal Title | Journal of Thai Interdisciplinary Research |
| Journal Vol. | 13 |
| Journal No. | 5 |
| Page no. | 31 |
| Keyword | wind velocity, light intensity, evaporation rate, saturated soils |
| URL Website | http://rdi.npru.ac.th |
| Website title | วารสารวิจัยสหวิทยาการไทย |
| ISSN | 2465-3837 |
| Abstract | The evaporation rate of saturated soil was investigated. The evaporation pan (Class A) was setup in a laboratoryscaleexperiments. The effects of varying light intensity from 0 to 1,000 W?m-2 and wind velocity from 0.53 to 1.82m?s-1 on the evaporation rate were investigated. It was found that light intensity plays an important role in theevaporation rate. The evaporation rate increased from 6. 08x10-5 to 11. 6x10-5 m?min-1 when the light intensityincreased from 0 to 1,000 W?m-2 because the convective mass transfer coefficients were increased due to thedecrease in vapor pressure difference between the water surface and air, while evaporation increased from 9.93x10-5to 13. 20x10-5 m?min-1 when the wind velocity increased from 0. 53 to 1. 82 m?s-1 because the convective masstransfer coefficients were increased due to the high temperature difference between the air and water surface. On theother hand, when light intensity decreased 0. 95% from 1,000 to 990. 52 W?m-2 caused the evaporation rate todecrease 0.0523x10-5 m?min-1 from 11.66x10-5 to 11.55x10-5 m?min-1 or 0.45% . While wind velocity decreased0.25% from 1.82 to 1.81 m?s-1, the evaporation rate decreased 0.0117x10-5 m?min-1 from 13.20x10-5 to 13.19x10-5m?min-1 or 0.089%. When compare to the actual data during the years 2008 to 2017, light intensity decreased 0.95%from 423. 66 to 419. 68 W?m-2 caused the evaporation rate to decrease 0. 0187 mm from 4. 351 to 4. 332 mm or0.432%. While the wind velocity decreased 0.25% from 6.041 to 6.026 m?s-1 caused the evaporation rate to decrease0. 001 mm from 4. 351 to 4. 350 mm or 0. 023% . Thus, light intensity has influence on the evaporation rate byaccounting for 95.01% of decrease in the evaporation rate and the wind velocity has influence on the evaporationrate by accounting for 4.99% of decrease in the evaporation rate. |
