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Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   2008 , Volume 22 , Number 2; Page(s) 272 To 284.
 
Paper: 

COMPUTER MODEL FOR COMPUTATION OF THE PARAMETERS OF FURROW GEOMETRY FUNCTIONS

 
 
Author(s):  SOROUSH F., MOSTAFAZADEHFARD B.*
 
* COLLEGE OF AGRICULTURE, ISFAHAN UNIVERSITY OF TECHNOLOGY, ISFAHAN, IRAN
 
Abstract: 

Furrow irrigation is one of the oldest methods of irrigation in which soil surface is used to convey and infiltrate water. The furrow geometry data are used for design, evaluation and simulation of furrow irrigation. With furrow geometry data, the furrow infiltration, irrigation efficiency and furrow erosion and sedimentation can be estimated more precisely. Furrow geometry is expressed with some power functions and the coefficients of these functions are used as input for surface irrigation models. In this article, a computer program with Matlab version 7 was written to calculate the furrow cross section functions. The functions are power functions and second order polynomial. To evaluate the model, two cross section data of a furrow irrigation field were used. The model predictions were compared with the two-point method of Elliott and Walker and the results showed that the coefficients of furrow cross section equations obtained by the Elliott and Walker are different with the model output. The results showed that the model is capable to predict the field cross-sectional data with high accuracy. The comparison of coefficient of determinations of the fitted power function and second order polynomial function to the field data showed that both functions can predict the field data closely.

 
Keyword(s): FURROW CROSS SECTION, SIMULATION, GEOMETRY FUNCTIONS, SURFACE IRRIGATION
 
References: 
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