Fall — Field Example
Define the finished purpose, reference levels, underlying material condition and the evidence required by the receiving operation. Geometry alone does not establish structural or agronomic performance.
This reference assembles relevant extracts from the guide library. It is general project planning, not a local project report, verified specification or translated technical publication.
Incorrect Fall
Fall is the change in elevation along a defined direction. An incorrect fall can include a reversal, an insufficient gradient or a gradient that differs from the design.
Before moving material
Identify the start and end points, distance and elevation reference.
Receiving operation and checks
Measure the corrected profile independently. Check intermediate points because correct end levels can still hide a local dip.
There is no universal drainage fall appropriate to every project.
Read the complete Incorrect Fall guideHow to Establish Fall Across Land
Fall across land is established by relating target elevations to measured horizontal distances. Set the required direction before choosing a gradient or moving soil.
Before moving material
Identify start, end and intermediate controls.
Receiving operation and checks
Measure the constructed surface independently. Check intermediate points and receiving outlets.
The example calculations on this site illustrate geometry, not universal design slopes.
Read the complete How to Establish Fall Across Land guideSlope and Fall Calculator
Fall calculation converts a slope and distance into a change in elevation. It does not decide which slope the project requires. For example, 300 metres at 1 in 5,000 gives a geometric fall of 60 millimetres.
Before moving material
Choose the measurement direction and confirm the units.
Receiving operation and checks
Compare planned end levels and intermediate checks with the design. Check millimetres versus metres and whether the entered distance is horizontal.
The example is geometry only, not an irrigation or drainage design recommendation.
Read the complete Slope and Fall Calculator guideRecord the job inputs
Use this checklist to turn the scenario into a specific brief. Retain the design revision and agree who accepts each completed layer.
Checklist ticks apply only while this page is open. Include the completed brief in your project records.
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