Laboratory Oscillating Nozzle Rainfall Simulator
Applies realistic drop size distribution and terminal impact velocity across the flume.
Agricultural Engineering / Rainfall Runoff Soil Loss
FREE TO EXPLORELABORATORY 19 · AGRICULTURAL ENGINEERING
Rainfall Simulator Surface Runoff & Sediment Yield (Universal Soil Loss Equation)
Measure surface runoff volume and soil sediment detachment under controlled artificial rainfall and calibrate the soil erodibility factor (K) in the Universal Soil Loss Equation (USLE). Explore interactive farm machinery simulation, irrigation hydraulics, and agricultural engineering telemetry.
FARM MACHINERY · SOIL & WATER · POST-HARVEST · STRUCTURES
Your virtual agricultural engineering laboratory.
TOTAL SOIL SEDIMENT YIELD A—
FIELD & TEST CELL TELEMETRY
Ready to sample with Erosivity EI/100 = 2.4 index/100.
Adjust Erosivity EI/100, then execute agricultural trial.
Agricultural engineering telemetry and biosystems states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity agricultural and environmental modeling.
Agricultural assumptions and boundary condition limits
USLE predicts average sheet and rill erosion; it does not model gully erosion, stream bank collapse, or mass landslides. Evaluated using bare tilled sandy clay loam soil packed in a 9% slope erosion flume (LS = 1.0, C = 1.0, P = 1.0) under simulated rainfall intensities from 35 to 110 mm/h.
Agricultural apparatus & field instrumentation sensors.
Tilting Soil Erosion Flume (1.0 m × 2.0 m)
Heavy-duty steel soil bed with porous drainage floor and adjustable slope from 0% to 20%.
Runoff & Sediment Collection Flume End-Trough
Captures all overland runoff water and detached soil sediment continuously.
Electronic Runoff Hydrograph Weighing Logger
Measures cumulative runoff mass at 5-second intervals to plot the hydrograph.
Suspended Sediment Centrifuge & Convection Oven
Separates suspended sediment from runoff aliquots and dries soil at 105°C.
Optical Disdrometer Raindrop Sensor
Measures droplet size spectrum and kinetic impact energy E with 0.1 mm precision.
FOLLOW THE METHOD
A reason behind every step.
Measure surface runoff volume and soil sediment detachment under controlled artificial rainfall and calibrate the soil erodibility factor (K) in the Universal Soil Loss Equation (USLE). Standardized parameter settings: 1.0, 1.7, 2.4, 3.1, 3.8, 4.5 index/100.
01
Soil Flume Packing & Slope Setup
Pack the erosion flume with sieved agricultural soil in 5 cm lifts to achieve uniform bulk density (1.30 g/cm³), setting flume tilt to exactly 9% standard slope.
02
Soil Pre-Wetting Calibration
Pre-wet the soil bed with fine mist for 15 minutes to bring topsoil to consistent field capacity and eliminate antecedent moisture variability.
03
Simulator Intensity Setting
Set oscillating nozzle frequency and water pressure to deliver rainfall intensity I = 35 mm/h (corresponding to EI_30 / 100 = 1.00).
04
Runoff Hydrograph & Sediment Sampling
Engage rainfall for exactly 30 minutes, recording the time to runoff initiation and collecting 1-liter runoff-sediment samples every 5 minutes from the collection trough.
05
Sediment Separation & Gravimetry
Flocculate and centrifuge runoff samples, decant clear water, and dry sediment in the 105°C oven to compute total sediment yield A (kg/ha).
06
Erosivity Stepping & Erodibility Slope
Increment rainfall erosivity across five additional levels (EI_30 / 100 = 1.7, 2.4, 3.1, 3.8, 4.5), plot sediment yield A versus erosivity, and extract the erodibility slope K_usle.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into agricultural engineering insight.
Points are your recorded observations. The solid regression line validates Rainfall Runoff Soil Loss mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
A = K_usle · (EI_30 / 100) = 12.5000 · (EI_30 / 100)
| # | Normalized Rainfall Erosivity Index EI_30 / 100 (index/100) | Total Soil Sediment Yield A (kg/ha) | Rainfall erosivity index EI_30 / 100 | Sediment yield A (kg/ha) | Remove |
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