13-02-2013, 09:47 AM
Planning and Management Considerations
Planning .ppt (Size: 1.02 MB / Downloads: 84)
Planning Considerations
Field Size
Available water supply
Management ability
Labor availability
Crops to be grown
Soils characteristics
Intake Rate
Water holding capacity
Center Pivot Planning Considerations
Field Size – General needs large areas
Available water supply – meets crop needs
Management ability – Can manage multiple systems
Labor availability – Low labor requirements
Crops to be grown – must clear canopy
Soils characteristics
Intake Rate - runoff potential at outer end
Water holding capacity – can apply small depths
Linear Move Planning Considerations
Field Size – General needs large rectangular areas
Available water supply – meets crop needs
Management ability – Can manage multiple systems
Labor availability – Labor required to move hose
Crops to be grown – must clear canopy
Soils characteristics
Intake Rate - Application rate constant along lateral
Water holding capacity – can apply small depths
Sprinkler System Capacity
Example of reducing capacity by 25% of net irrigation capacity based on soil water holding capacity and Eastern Colorado climatic conditions.
One inch maximum depletion would be exceeded one out of two years.
Five inch maximum depletion would not be exceeded.
MULTIPLE RUNS
Evaluate multiple designs
Analyze effect of changes in drawdown
Effects of elevation changes
Effect of big gun operation
Identify potential problems with nozzle wear, changes in pipe roughness, pumping plant, and water table depth.
Effect of pressure regulators