Land Use And Impervious Mapping
2 hoursDigitize parcels; assign curve numbers.
Intermediate4-8 hours
Stormwater Runoff Model Guide
Complete stormwater runoff model guide for hydrology practitioners. Step-by-step workflow with 4 stages and 4 specialized tools. Covers land use and impervious mapping, select design storm hyetograph, run hec-hms or equivalent.
stormwater engineersplanners
Workflow
Select Design Storm Hyetograph
1 hourApply regional IDF for target duration.
Run HEC-HMS Or Equivalent
2 hoursRoute subbasin runoff through network.
Size Detention Or Conveyance
2 hoursCompare peak and volume to ordinance limits.
Tools Used
Checklist
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Planning
Preparation
Safety
Execution
Reference Materials
TR-55Standard
Document CN and time of concentration.
SCS RunoffFormula
Q from rainfall and CN.
CN ClassesTable
Reference values.
| Cover | CN |
|---|---|
| Forest | 55 |
| Urban | 98 |
Label in Field
Label samples immediately with date, GPS coordinates, and habitat notes.
Chain of Custody
Maintain sample integrity from collection through lab analysis.
Wildlife Safety
Know venomous species and territorial animals in your study area.
Safety Notes
- Verify outfall floodplain limits.
- Mark utilities before excavation.