| Author | Warawuth Sukchaem |
| Call Number | AIT Thesis no. 166 |
| Subject(s) | Hydraulics
|
| Note | A Thesis submitted in partial fulfillment of the requirements
for the Degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | Upward movement of water from a water table with the deposition of salts at the soil surface is a common occurrence.. The salts are carried
up by the upward movement of water. The rate of salt accumulation depends upon the rate of upward flow. The sub-irrigation method for irrigated land is another point of interest which the study of upward
flow plays an important role to fulfill the requirements of the method. This study investigates the maximum rate of water which can be conducted upward by the soil-water system. The equations were developed to
relate the maximum flow rates from a water table in terms of measurable soil parameters. The accuracy of the results was confirmed by comparing
experimental values with theory for conditions of stratified soils in a drainage cycle. The upward flow was introduced by means of an outflow siphon at the
top of a soil column and an inflow siphon attached below the column to maintain the water table as desired. With controlling of room condition
for evaporation loss, the experimental results showed good agreement with the theoretical equation, except for shallow depths of water table. At this depth the experimental conditions in the laboratory were not able to produce a high value of capillary pressure at the soil surface. The measured flow rates are therefore naturally lower than the flow rate from theoretical equation. |
| Year | 1967 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Arbhabhirama Anat |
| Examination Committee(s) | Schulz, Edmund F. ; Flammer, Gordon H. |
| Scholarship Donor(s) | SEATO |
| Degree | Thesis (M. Eng.) - SEATO Graduate School of Engineering, 1967 |
