Built by
Benjy Marks
Select
EP
FL
Phreatic
Impermeable Area
Standpipe
New EP head (m)
x: -, y: -
?
h
Select and drag endpoints/lines/polygons to edit geometry and BCs.
Instructions
Close
Quick Start
Pick an example or start from the default model.
Draw boundaries with EP, FL, Phreatic, and Impermeable Area tools.
Switch to Standpipe and click to read head and water rise.
Tune Kx, Ky, grid size, and EP/FL interior counts in Settings.
Tool Meanings
EP:
fixed hydraulic head line.
Phreatic:
fixed head equal to elevation.
FL:
impermeable no-flow line.
Impermeable Area:
no-flow polygon.
Select:
move/edit existing boundaries and polygons.
View + Editing Controls
Wheel/pinch to zoom.
Drag empty canvas space (in Select) to pan.
Fit
resets to full-domain view.
h
toggles head-value shading overlay.
In Select:
Alt
+edge click adds a vertex,
Ctrl/Cmd
+vertex click removes one.
Esc
cancels drawing.
Delete
removes the selected item.
Save / Load / Export
Save PNG
exports the current canvas image.
Save state
exports model setup (domain, solver, boundaries, view) as JSON.
Load state
by dragging a saved JSON or `.flownet2` file onto the app.
Notes
Outer boundary is no-flow by default unless overridden by user-drawn EP/phreatic lines.
Coordinates mode switches between real
(x, y)
and transformed
(x', y')
space.