InfoSWMM SUBHYD.DBF File in ISDB Folder
| Column | Value |
|---|---|
| ID | LS33 |
| RAINGAGE | 2-Mar |
| OUTLET | 330 |
| AREA | 1588 |
| IMPERV | 25 |
| WIDTH | 500 |
| SLOPE | 0.5 |
| CURB_LEN | 0 |
| SNOWPACK | |
| IMPERV_N | 0.1 |
| PERV_N | 0.001 |
| IMPERV_S | 0.05 |
| PERV_S | 0.05 |
| PCT_ZERO | 25 |
| ROUTE_TO | 0 |
| PCT_ROUTED | |
| LENGTH | |
| CNTRD_DIST | |
| NRCS_CN | |
| DCIA_LEVEL | |
| CIA_RATIO | |
| RPA_RATIO | |
| TC | |
| WQCV | |
| WQCV_TIME | |
| RNFF_COEFF | |
| STOR_COEFF | |
| EMPI_COEFF | |
| CNVY_FCTR | |
| INFIL_MDL | |
| DEP_STOR | |
| MRM_TOCM | |
| STOR_CONST | |
| RESVR_CNT | |
| STOR_EXPNT | |
| ADJ_PER_N | |
| ADJ_DS | |
| ADJ_INFIL |
Here are some possible interpretations of the columns:
- ID: a unique identifier for the component
- RAINGAGE: the rain gauge used to measure precipitation
- OUTLET: the location where water exits the system (such as a storm drain or stream)
- AREA: the area of land that drains to this component
- IMPERV: the percentage of the contributing area that is impervious (does not allow water to infiltrate into the ground)
- WIDTH: the width of the channel or pipe leading to/from this component
- SLOPE: the slope of the channel or pipe leading to/from this component
- CURB_LEN: the length of curb or other edge treatment that affects the flow of water into this component
- SNOWPACK: information about snow accumulation (not provided in this row)
- IMPERV_N: the Manning's roughness coefficient for flow on impervious surfaces
- PERV_N: the Manning's roughness coefficient for flow on pervious surfaces
- IMPERV_S: the depression storage depth for impervious surfaces
- PERV_S: the depression storage depth for pervious surfaces
- PCT_ZERO: the percentage of impervious area with zero depression storage
- ROUTE_TO: the component that receives the outflow from this component
- PCT_ROUTED: the percentage of the outflow that is routed to the next component
- LENGTH: the length of the channel or pipe leading to/from this component
- CNTRD_DIST: the distance to the centroid of the contributing area
- NRCS_CN: the Soil Conservation Service curve number for the contributing area
- DCIA_LEVEL: the depth of direct contribution (rainfall that directly enters the system rather than flowing over land)
- CIA_RATIO: the ratio of direct contribution to total rainfall
- RPA_RATIO: the ratio of rainfall to impervious area
- TC: the time of concentration (the time it takes for water to travel from the farthest point in the contributing area to the outlet)
- WQCV: the water quality volume (the volume of runoff that must be treated to meet water quality standards)
- WQCV_TIME: the time it takes to treat the water quality volume
- RNFF_COEFF: the runoff coefficient for the contributing area
- STOR_COEFF: the storage coefficient for the component
- EMPI_COEFF: the empirical coefficient for the component
- CNVY_FCTR: the conveyance factor for the component
- INFIL_MDL: the infiltration model used for the component
- DEP_STOR: the depth of storage provided by the component
- MRM_TOCM: information about treatment (not provided in this row)
- STOR_CONST: the storage constant for the component
- RESVR_CNT: the number of reservoirs in the component
- STOR_EXPNT: the storage exponent for the component
- ADJ_PER_N: the adjusted Manning's roughness coefficient for pervious surfaces
- ADJ_DS: the adjusted depression storage depth for the component
- ADJ_INFIL: the adjusted infiltration capacity for the component.
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