IRRIG8: Multiple sprayline calculator

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🚿 Multiple Sprayline Irrigation System Calculator v1.2.0

Code of Practice Section 4.4 Compliant - Multiple Sprayline Irrigation Systems

Grid DU + Pressure DU + Sprinkler Performance Analysis

🏡 Farm & Property Information
👨‍🔬 Consultant & Evaluation Details
🏗 Multiple Sprayline System Configuration
💧 Sprinkler/Emitter Configuration
Affects maximum collector spacing limits
Manufacturer, model, and nozzle size
Distance between sprinklers on each sprayline
Full wetted diameter of sprinkler pattern (Section 4.4.13.1)
System design target pressure
Equation 22: q = Kd × p^x (can be determined from sprinkler test)
From manufacturer data or field determination (Section 4.4.13.3)
📏 Sprayline Configuration
Section 4.4: Multiple sprayline systems (3-20 spraylines)
Distance between parallel spraylines
Physical length of each sprayline
Sprayline Length + (0.75 × Wetted Diameter)
Effective Sprayline Length × Sprayline Spacing × Total Spraylines ÷ 10,000
🌱 Soil Information
Soil texture classification affecting infiltration and ponding
Basic infiltration rate of soil (typical range: 1-100 mm/hr)
Accounts for surface water pooling effects. Typical values: 1.0 (no ponding), 0.9-0.95 (minor ponding), 0.85-0.90 (moderate ponding). Observed during field operation.
🔬 Section 4.4.13 Sprinkler Performance Testing

Testing Requirements (Section 4.4.13.2)

  • Test at least 4 adjacent sprinklers near middle of a single sprayline
  • Avoid inlet end where pressure variation is typically too great
  • Ensure all sprinklers tested are of same specifications
  • Capture all flow without flooding nozzle or affecting pressure
  • Use container of at least 5 litres and measure time accurately
Section 4.4.13.2 requires minimum 4 adjacent sprinklers
Or Upload CSV Data

Format: Sprinkler ID, Position (m), Pressure (kPa), Volume (mL), Time (s), Flow (L/hr)

Select number of sprinklers and click "Generate Input Fields" to begin
⚖️ Section 4.4.13.3 Adjusted Pressure Test

Adjusted Pressure Requirements

Repeat measurements after adjusting pressure by about 20% to determine discharge coefficient:

  • If normal pressure 50-80 kPa: try to increase pressure
  • If normal pressure 100-140 kPa: reduce pressure
  • Use same sprinklers and measurement technique
  • Reset system to normal conditions after test
Complete normal pressure test first
📐 Section 4.4 Collector Placement Setup

Code Requirements (Section 4.4.13.5)

  • Maximum spacing: 3m for sprayers, 5.0m for impact sprinklers/rotators
  • Collector column spacing (Scc) must be a factor of sprayline spacing (Ds)
  • Collector row spacing (Scr) must be a factor of sprayline spacing (Dsr)
  • Grid test between three adjacent sprinklers
Section 4.4.13.4: Test between adjacent sprinklers
Valid options based on sprayline spacing and sprinkler type
Number of collectors positioned left of sprayline center
Number of collectors positioned right of sprayline center
Configure system first
💧 Grid Distribution Uniformity Test

Section 4.4 Grid Test Methodology

Grid uniformity test arranged between three adjacent sprinklers in representative part of system. Grid centered on sprayline, extending just beyond wetted width.

⚙️ Test Parameters
Total irrigation test time
Diameter of collectors used for Grid DU test and depth calculations
🌡️ Evaporation Test (Control Collector)
Initial volume in control collector at start of test
Final volume in control collector at end of test
Diameter of control collector used for evaporation measurement
Automatically calculated from control collector data above
📊 Data Collection Method

📄 Upload Grid DU Data from CSV

Format: Transect ID, Distance along transect (m), Volume (mL), Collection Time (min)

✏️ Manual Grid Data Entry

Grid input fields are auto-generated based on your collector setup configuration.

Configure collector setup to auto-generate grid input fields
Upload CSV data or manually enter collector measurements
🧮 Calculate Grid Distribution Uniformity
🔧 Pressure Distribution Uniformity Analysis

Pressure-Flow Relationship (Equation 22)

q = Kd × p^x where q is flow, Kd is discharge coefficient, p is pressure, x is exponent

📄 Upload Pressure Data from CSV

Format: Lateral ID, Distance along lateral (m), Pressure (kPa)

✏️ Manual Pressure Data Entry

3 measurements per sprayline: inlet, middle, and outlet pressure
Select number of pressure points and click "Generate Input Fields" to begin manual entry
📊 Multiple Sprayline System Performance Results

Section 4.4 Multiple Sprayline Analysis

Complete all tests to see comprehensive field performance results.

  • Sprinkler Performance: Discharge coefficient and pressure-flow relationship
  • Grid DU: Distribution pattern uniformity from collector test
  • Pressure DU: Flow uniformity from pressure variations
  • Field DU: Combined performance using simple multiplication
📋 Section 4.4 Compliant Report Generation