| Author | Buree Suwanarat |
| Call Number | AIT Thesis no. WM-95-24 |
| Subject(s) | Water balance (Hydrology)--Thailand--Phitsanulok
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Civil and Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-95-24 |
| Abstract | It is important to estimate the components of water balance in a large irrigation project.
The quantity of water should be clarified to understand water demand behavior. The water balance
in three sub-projects of Phitsanulok Irrigation Project was studied for the period of 1991 through
1994. The rainfall trend over the command area in long term period indicated that 1991-1993 was
in the drought period. Available data allowed estimates to be made for some components of the
water balance equation and the storage change was the residual. Average areal rainfall in each subproject
was estimated by Thiessen Polygon method and the effective rainfall was calculated from
previous studies in the project area. The reference evapotranspiration was calculated using
Penman Monteith and F AO Modified Penman methods.
Considering three sub-projects in this study, Phlai Chumphon had consumed more
irrigation water than the other two sub-projects. Thabua lacked irrigation water most and used
other water sources extensively at the field level. The overall efficiency was calculated in the
study, and the results indicated that the dry season irrigation efficiency was higher than the wet
season in every sub-project. Phlai Chumphon and Dong Setthi sub-projects sometimes had
negative overall efficiency due to the unusual excess effective rainfall on a monthly basis.
Cultivation of upland crop should be promoted in dry season to reduce irrigation water
requirements. |
| Year | 1996 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-95-24 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Loof, Rainer |
| Examination Committee(s) | Onta, Pushpa Raj;Ammentorp, Hans Christian |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology |