💦 Centre-Pivot Irrigation Lab: Nozzle Flow, Application Depth and Christiansen Uniformity

A full-scale 3D centre-pivot field: nozzle flow rises linearly with radius (q ∝ √pressure) to keep application depth uniform, while the percent timer, wind drift, evaporation, friction along the lateral and nozzle faults decide the catch-can depth, Christiansen and Heermann-Hein uniformity, and Green-Ampt runoff.