Results 161 to 170 of about 2,148 (214)

Infiltration Variability in Furrow Irrigation

Journal of Irrigation and Drainage Engineering, 2002
In this paper, the contribution of different sources of variability to irrigation water depth variability was quantified using a combination of variance techniques. This method was applied using field measurements from irrigation events performed on a loamy soil with a low-infiltration rate.
Oyonarte, N. A., Mateos, Laura, Martín-Palomo, M. J.   +2 more
openaire   +2 more sources

The comparison of advance and erosion of meandering furrow irrigation with standard furrow irrigation under varying furrow inflow rates

Irrigation and Drainage Systems, 2009
Meandering furrow irrigation (Gholam-gardeshi irrigation) is a modified form of furrow irrigation, which has being used in Iran, but to date, there is no study about the erosion of this method of irrigation. To measure the erosion of meandering furrow irrigation and to compare the results with standard furrow irrigation, two experimental fields with ...
Behrouz Mostafazadeh-Fard, Roghayeh Kavei-Deylami, Sayed-Hossain Saghaian-Nejad, Ahmad Jalalian   +3 more
openaire   +1 more source

Infiltration parameters for furrow irrigation

Agricultural Water Management, 2004
Abstract This paper analyzes four different methods to determine for two furrow sizes (narrow=40 cm and wide=60 cm at the top) the infiltration constants of the Kostiakov model: the two-point method, furrow infiltrometer method, advance method, and one-point method.
E.A Holzapfel, J Jara, C Zuñiga, M.A Mariño, J Paredes, M Billib   +5 more
openaire   +2 more sources

Intake Characteristics of Irrigation Furrows

Transactions of the ASAE, 1978
ABSTRACT EARTH linings are frequently used in reservoirs, canals, and other earth structures to control liquid movement for the purposes of pollution control, water conservation, and structural stability. Clays or chemicals are often added to linings to reduce the hydraulic con-ductivity of the native soil, however, both additives sometimes decrease in
null D. D. Fangmeier, null M. K. Ramsey
openaire   +1 more source

Sediment transport in furrow irrigation

Irrigation Science, 2009
Irrigation-induced erosion in furrow irrigation causes loss of fertile soil and water quality degradation. Hence, quantification of irrigation-induced erosion is essential for efficient management of furrow irrigation. In this study, sediment transport was studied under bare and cropped field conditions for a furrow plot consisting of three parabolic ...
Damodhara R. Mailapalli, N. S. Raghuwanshi, R. Singh   +2 more
openaire   +1 more source

Analytical Model for Furrow Irrigation

Journal of Irrigation and Drainage Engineering, 1990
An analytical model is developed to simulate all phases of furrow irrigation. The model transforms any real furrow cross section shape to a discharge-equivalent semicircular shape, and can therefore be applied to any form of furrow cross section. Parabolic shapes are used to describe the surface and subsurface flow profiles and their coefficients are ...
Fang X. Yu, Vijay P. Singh
openaire   +1 more source

Earthworms and Furrow Irrigation Infiltration

Transactions of the ASAE, 1989
ABSTRACT Infiltration rates into furrows in southcentral Idaho, after decreasing toward a base rate, sometimes increase. The increase is sometimes sufficient to cause tailwater runoff to cease and the furrow stream to recede up the furrow, resulting in poor water distribution. The infiltration increase is caused by earthworms piercing the furrow wetted
Trout, T.J., Johnson, G.S.
openaire   +1 more source

Daily Furrow Irrigation in Orchards

Applied Engineering in Agriculture, 1990
High frequency furrow irrigation can achieve tree growth and yield responses similar to trickle irrigation on sweet cherry trees. Daily surge flow furrow irrigations from 1982 through 1986 were scheduled based on daily pan evaporation. Application efficiencies were near 80% and soil erosion was minimal even though slopes were in excess of 3%.
null R. G. Evans, null E. L. Proebsting, null M. O. Mahan   +2 more
openaire   +1 more source

Infiltration Model for Furrow Irrigation

Journal of Irrigation and Drainage Engineering, 1998
Infiltration rates of soils are spatially and temporally variable, which complicates surface irrigation management. The variability is magnified when water supplies are limited because crops in some portions of the field are intentionally stressed. Soil water content and soil cracking effects need to be considered to better model deficit irrigation ...
Juan Enciso-Medina, Derrel Martin, Dean Eisenhauer   +2 more
openaire   +1 more source

Furrow irrigation erosion and management

Irrigation Science, 2004
Irrigation-induced furrow erosion reduces topsoil depth and pollutes surface waters. A variety of interacting factors, including inflow rate, slope and soil type, are known to affect furrow erosion. Data are inadequate to understand the furrow erosion process sufficiently well to recommend irrigation practices that maintain high levels of water quality
R. Fern�ndez-G�mez, L. Mateos, J. V. Gir�ldez   +2 more
openaire   +1 more source