Irrigation System Designing - Practices of Irrigation and On-farm Water Management - page 78

kinematic-wave, zero-inertia, and hydrodynamic analyses. Design output includes
field dimensions, optimal inflow and cutoff time, and field subdivisions.
3.2.8.4 WinSRFR
WinSRFR is an integrated software package for analyzing surface irrigation sys-
tems (border, basin, furrow). Founded on an unsteady flow hydraulic model, the
software integrates event analysis, design, and operational analysis functionalities,
in addition to simulation (USDA-ARS-ALARC, 2006 ; Bautista et al., 2009). Except
for the Event Analysis, WinSRFR's capabilities are based on those provided by the
programs SRFR, BORDER, and BASIN. Procedures in the Event Analysis world
are used to evaluate the performance of irrigation events from field measured data
and to estimate infiltration parameters needed for evaluation, simulation, physical
design, and operational analysis.
WinSRFR was designed with two important organizational features. First,
WinSRFR has four major defined functionalities (referred to as Worlds in the
software):
Event Analysis World - Irrigation event analysis and parameter estimation
functions
Physical Design World - Design functions for optimizing the physical layout
of a field
Operations Analysis World - Operations functions for optimizing irrigations
Simulation World - SRFR simulation functions for testing and sensitivity
analysis
The second organizational feature is that scenarios run with these functions are
stored in separate data folders. This structure organizes the data into logical groups
and allows outputs generated in one World to be used as inputs in a different World.
Performance measures analyzed by WinSRFR include distribution uniformity,
potential application efficiency, runoff and deep percolation fractions, minimum
infiltrated depth, total applied depth, the ratio of advance distance at cutoff time
relative to field length, or the ratio of cutoff time to final advance time. The tool
allows users to search for combinations of the decision variables that will result
in high levels of uniformity and efficiency while taking into account practical and
hydraulic constraints.
3.2.8.5 SADREG
SADREG is a Web decision support system for surface irrigation design, an Internet
application to assist designers and managers in the process of design and planning
improvements in farm surface irrigation systems - furrow, basin, and border irri-
gation (Muga et al., 2008 ) . It allows creating a large set of alternative solutions,
their impact evaluation and multicriteria selection analysis through an integrated
framework of user knowledge, database, and simulation models.