NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Combined water use of turf and woody ornamentals in an irrigated South Texas landscape
| dc.creator | Havlak, Roger Dale | |
| dc.date.accessioned | 2012-06-07T23:21:50Z | |
| dc.date.available | 2012-06-07T23:21:50Z | |
| dc.date.created | 2004 | |
| dc.date.issued | 2004 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-2004-THESIS-H28 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references (leaves 77-80). | en |
| dc.description | Issued also on microfiche from Lange Micrographics. | en |
| dc.description.abstract | Landscape water conservation and potential evapotranspiration (PET or ET[p]) based irrigation programs are hindered by a lack of data on actual evapotranspiration (ET[a]) rates of multiple plant species landscapes. Irrigation coefficients are commonly used in potential ET based irrigation programs for turf but little in situ water use information exists for trees, shrubs, or ornamental plants. The objectives of this research were to evaluate the soil water dynamics within a multiple species landscape and to determine the relationship between ET[a] and ET[p] to develop a landscape irrigation coefficient. An additional objective was to assess the effects of several landscape species on soil water dynamics in an irrigated South Texas landscape. Soil moisture sensors were installed at 64 locations at depths of 0 to 20, 20 to 40, and 40 to 60 cm to record volumetric soil water content at 30 min intervals. Changes in volumetric water content between 0 hr of successive days were used to determine daily ET[a] and compared with ET[p]. The ratio of actual to potential ET was used to calculate a landscape irrigation coefficient. The daily landscape irrigation coefficients ranged from 0.05 to 1.00 and were influenced by soil moisture levels and season of the year. Monthly landscape coefficients (L[c]) ranged from 0.51 to 0.67 and the upper 20 cm of soil supplied the greatest percentage of ET[a] for all landscape species and the landscape as a whole. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | agronomy. | en |
| dc.subject | Major agronomy. | en |
| dc.title | Combined water use of turf and woody ornamentals in an irrigated South Texas landscape | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | agronomy | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004)
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.