Monday, March 20, 2023

InfoSWMM SUBHYD.DBF File in ISDB Folder

InfoSWMM SUBHYD.DBF File in ISDB Folder

ColumnValue
IDLS33
RAINGAGE2-Mar
OUTLET330
AREA1588
IMPERV25
WIDTH500
SLOPE0.5
CURB_LEN0
SNOWPACK
IMPERV_N0.1
PERV_N0.001
IMPERV_S0.05
PERV_S0.05
PCT_ZERO25
ROUTE_TO0
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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