|
Titre :
|
Application rates under low-energy irrigation systems for input to water redistribution system, REF 94-2097
|
|
Auteurs :
|
D. Hermann ;
R. Smith ;
ASAE ;
K. Stahl
|
|
Type de document :
|
ouvrage
|
|
Editeur :
|
ST-JOSEPH(MI-USA) : ASAE, 1994
|
|
Format :
|
10 p.
|
|
Langues:
|
= Anglais
|
|
Mots-clés:
|
IRRIGATION
;
IRRIGATION PAR ASPERSION
;
PIVOT
;
INFILTRATION
;
ECOULEMENT
;
SIMULATION NUMERIQUE
;
DISTRIBUTION D'EAU
|
|
Résumé :
|
The translocation and runoff under center pivot irrigation systems is an important consideration in determining the infiltration dept uniformity and loss of water for a given field. An analysis is presented that compares the relationship of potential runoff as a function of different distances from the pivot under the system. The infiltration characteristics are determined with a numerical simulation of a silt loam soil using the Richard's equation. The application rates are simulated from the overlap of triangular, elliptical and donut sprinkler patterns. It was concluded that for low pressure systems the change in pattern affects the potential runoff by 6 %. This is compared to a 12% difference between point 240 and 350 m from the pivot point. Differences in potential runoff was found to be 2-3% between adjacent heads.
|
