Scenario arithmetic only—not engineering design, regulatory compliance, infiltration suitability, water-quality, or flood-safety advice. Verify system assumptions and requirements with qualified local professionals.

StepVolume unitInitial storageCapacityReserve floorOutlet rate per hourDefault outlet active hours / stepInfiltration rate per hourInfiltration cap / stepDefault reuse / stepFixed assumed loss / stepStorage loss % / stepRestoration target storageRestore by source step numberMissing policyScenario name

Series CSV: period,inflow,reuse,active_hours

Period is YYYY-MM-DDTHH:00 for hourly or YYYY-MM-DD for daily. Each row first adds inflow and removes above-capacity overflow, then allocates controlled release, infiltration, reuse, and assumed losses. Outlet activity is limited by active hours; infiltration runs across the one- or 24-hour step. Reserve constrains release, infiltration, and reuse, but not losses.

Import JSON

Per-step cistern mass balance
Period	Start	Inflow	Overflow	Outlet hours	Release	Infiltration	Reuse request	Reuse served	Unmet reuse	Losses	End	Residual

Stormwater Cistern Drawdown Planner

Assumptions / restoration