Record Details
Evaluation of evapotranspiration and irrigation performance in Oregon south coast
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Evaluation of evapotranspiration and irrigation performance in Oregon south coast |
| Names |
Sriprisan, Sirikul (Indi)
(creator) English, Marshall J. (advisor) |
| Date Issued | 2001-05-07 (iso8601) |
| Note | Graduation date: 2001 |
| Abstract | This study was prompted by the need for improving the efficiency of irrigation systems at the Oregon South coastal areas. Accurate information about evapotranspiration (ET) rates is essential for maximizing the efficiency of irrigation systems. Currently, ET estimates provided by Bureau of Reclamation AgriMet Program are derived from the Kimberly Penman (KP) model. However, there are questions of the accuracy of the Kimberly Penman model for estimation of reference ET in the coastal areas and whether or not the Penman-Monteith (PM) model should be used instead to estimate ET for the south coast. The first objective of this study is the evaluation the PM ET model as a possible improvement over the KP model. The second objective is to ascertain the impact of microclimatic variability on local ET estimates, and, if necessary, to create unique ET estimates for each region. The third objective is the derivation of appropriate uniformity and application efficiency values for the solid-set sprinkler systems commonly used in Oregon's south coastal regions. A series of tests and analyses is performed to accomplish the objectives stated above The comparisons of weather data especially winds and humidity show significant microclimate variability in each region. The comparative tests of reference ET models indicated that the PM model yielded lower ET estimates than the widely used KP model in most locations In addition to these comparative tests, a reliability analysis of Bano ET estimates show that Bano ET may not be an appropriate representation of all cranberry-growing locations because of differences in microclimates Thus, modified El values are developed to account for these conditions The improved El estimates and uniformity analyses are employed in the development of appropriate recommendations for management and design at irrigation systems. |
| Genre | Thesis/Dissertation |
| Topic | Evapotranspiration -- Oregon |
| Identifier | http://hdl.handle.net/1957/20912 |
