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Stormwater Planning Tool

Optimize cistern pre-drain timing and size rain gardens. Achieve compliance with stormwater regulations while minimizing infrastructure costs.

System Configuration

Irrigation + indoor non-potable use

For recharge calculations

DC's standard design storm is 1.7 inches

100% = full cistern before storm, 0% = empty

Optimization Results

Configure your system parameters and click "Run Optimization" to see results

How It Works

1

Configure Your System

Enter your cistern size, catchment area, and soil infiltration rate

2

Run Optimization

The tool tests 48 pre-drain scenarios to minimize overflow

3

Size Rain Garden

Get the optimal rain garden size and SRC credit calculations