Soil water variability under subsurface drip and furrow irrigation |
| |
| Authors: | S Amali D E Rolston A E Fulton B R Hanson C J Phene J D Oster |
| |
| Institution: | (1) Kennedy/Jenks Consultants, 530 South 336th Street Federal Way, WA 98023, USA E-mail: saidamali@kennedyjenks.com, ML;(2) Land, Air and Water Resources Department, University of California, Davis, CA 95616, USA, US;(3) U.C. Cooperative Extension, 680 N. Campus Dr. Hanford, CA 93230, USA, US;(4) Now retired, formerly with USDA-ARS, Water Management Research Laboratory, 2021 S. Peach Ave. Fresno, CA 93727, USA, US;(5) Cooperative Extension, Soil and Environmental Sciences, University of California, Riverside, CA 92521, USA, US |
| |
| Abstract: | Non-uniformities in soil hydraulic properties and infiltration rates are considered to be major reasons for the inefficiencies
of some surface irrigation systems. These non-uniformities may cause non-uniformities in soil water contents and could potentially
affect plant growth. To investigate whether the non-uniformities in soil water contents can be overcome by well-managed irrigation
systems, fields with clay loam soils and planted to cotton were irrigated with a continuous-flow, a surge flow, and a subsurface
drip system. Measurements of water contents in each field were taken throughout the growing season at several depths. The
water contents measured within the top 0–0.9 m in the three irrigations systems were evaluated in terms of their spatial and
temporal variabilities. The analyses indicated that on this soil, use of the surge flow system did not lead to increased spatial
uniformities of soil water contents compared with the continuous-flow system. Use of the subsurface drip system resulted in
very non-uniform soil water contents above the depth of the emitters. Variability in water contents below the emitter depth
was comparable to the surface irrigation systems.
Received: 26 March 1996 |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
