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Last active March 9, 2023 15:07
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SWMM Surface Runoff and Storage difference in RPT and OUT file
Raw
readme.md

I have two models, the first model has one subcatchment and second has two subcatchments. The sum of impervious, pervious and impervious areas are equal for both models. I add an 10 mm constant rainfall with a duration of 1 hour.
The infiltration rate is set to 10 mm/h.
The storage for impervious areas is 5 mm.
The evaporation rate is set to 0 mm/day.
The sum of subcatchment areas is 100 ha with 50% impervious and 50% impervious with no storage.
This should result in 10.000 m³ rainfall, 5000 m³ infiltration loss, 1250 m³ stored volume in the impervious areas and 3750 m³ runoff.

Raw
one_sc.inp
[TITLE]
;;Project Title/Notes
[OPTIONS]
;;Option Value
FLOW_UNITS LPS
INFILTRATION HORTON
FLOW_ROUTING DYNWAVE
LINK_OFFSETS DEPTH
MIN_SLOPE 0
ALLOW_PONDING NO
SKIP_STEADY_STATE NO
START_DATE 01/01/2023
START_TIME 00:00:00
REPORT_START_DATE 01/01/2023
REPORT_START_TIME 00:00:00
END_DATE 01/01/2023
END_TIME 00:00:00
SWEEP_START 01/01
SWEEP_END 12/31
DRY_DAYS 0
REPORT_STEP 00:00:01
WET_STEP 00:00:01
DRY_STEP 00:00:01
ROUTING_STEP 0:00:01
RULE_STEP 00:00:00
INERTIAL_DAMPING PARTIAL
NORMAL_FLOW_LIMITED BOTH
FORCE_MAIN_EQUATION H-W
VARIABLE_STEP 0.75
LENGTHENING_STEP 0
MIN_SURFAREA 12.566
MAX_TRIALS 8
HEAD_TOLERANCE 0.005
SYS_FLOW_TOL 5
LAT_FLOW_TOL 5
MINIMUM_STEP 0.5
THREADS 1
[EVAPORATION]
;;Data Source Parameters
;;-------------- ----------------
CONSTANT 0.0
DRY_ONLY NO
[RAINGAGES]
;;Name Format Interval SCF Source
;;-------------- --------- ------ ------ ----------
RG VOLUME 1:00 1.0 TIMESERIES TS
[SUBCATCHMENTS]
;;Name Rain Gage Outlet Area %Imperv Width %Slope CurbLen SnowPack
;;-------------- ---------------- ---------------- -------- -------- -------- -------- -------- ----------------
SC RG OL 100 50 200 0.5 0
[SUBAREAS]
;;Subcatchment N-Imperv N-Perv S-Imperv S-Perv PctZero RouteTo PctRouted
;;-------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
SC 0.01 0.1 5 5 50 OUTLET
[INFILTRATION]
;;Subcatchment Param1 Param2 Param3 Param4 Param5
;;-------------- ---------- ---------- ---------- ---------- ----------
SC 10 10 4 7 0
[OUTFALLS]
;;Name Elevation Type Stage Data Gated Route To
;;-------------- ---------- ---------- ---------------- -------- ----------------
OL 0 FREE NO
[TIMESERIES]
;;Name Date Time Value
;;-------------- ---------- ---------- ----------
TS 1:00 10
TS 2:00 0
[REPORT]
;;Reporting Options
SUBCATCHMENTS ALL
NODES ALL
LINKS ALL
[COORDINATES]
;;Node X-Coord Y-Coord
;;-------------- ------------------ ------------------
OL 11 14
[VERTICES]
;;Link X-Coord Y-Coord
;;-------------- ------------------ ------------------
[Polygons]
;;Subcatchment X-Coord Y-Coord
;;-------------- ------------------ ------------------
SC 10 12
SC 10 2
SC 0 2
SC 0 12
[SYMBOLS]
;;Gage X-Coord Y-Coord
;;-------------- ------------------ ------------------
RG 11 0
Display the source blob
Display the rendered blob
Raw
surface_storage_error.ipynb
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Raw
two_sc.inp
[TITLE]
;;Project Title/Notes
[OPTIONS]
;;Option Value
FLOW_UNITS LPS
INFILTRATION HORTON
FLOW_ROUTING DYNWAVE
LINK_OFFSETS DEPTH
MIN_SLOPE 0
ALLOW_PONDING NO
SKIP_STEADY_STATE NO
START_DATE 01/01/2023
START_TIME 00:00:00
REPORT_START_DATE 01/01/2023
REPORT_START_TIME 00:00:00
END_DATE 01/01/2023
END_TIME 00:00:00
SWEEP_START 01/01
SWEEP_END 12/31
DRY_DAYS 0
REPORT_STEP 00:00:01
WET_STEP 00:00:01
DRY_STEP 00:00:01
ROUTING_STEP 0:00:01
RULE_STEP 00:00:00
INERTIAL_DAMPING PARTIAL
NORMAL_FLOW_LIMITED BOTH
FORCE_MAIN_EQUATION H-W
VARIABLE_STEP 0.75
LENGTHENING_STEP 0
MIN_SURFAREA 12.566
MAX_TRIALS 8
HEAD_TOLERANCE 0.005
SYS_FLOW_TOL 5
LAT_FLOW_TOL 5
MINIMUM_STEP 0.5
THREADS 1
[EVAPORATION]
;;Data Source Parameters
;;-------------- ----------------
CONSTANT 0.0
DRY_ONLY NO
[RAINGAGES]
;;Name Format Interval SCF Source
;;-------------- --------- ------ ------ ----------
RG VOLUME 1:00 1.0 TIMESERIES TS
[SUBCATCHMENTS]
;;Name Rain Gage Outlet Area %Imperv Width %Slope CurbLen SnowPack
;;-------------- ---------------- ---------------- -------- -------- -------- -------- -------- ----------------
SC1 RG OL 50 50 200 0.5 0
SC2 RG OL 50 50 200 0.5 0
[SUBAREAS]
;;Subcatchment N-Imperv N-Perv S-Imperv S-Perv PctZero RouteTo PctRouted
;;-------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
SC1 0.01 0.1 5 5 50 OUTLET
SC2 0.01 0.1 5 5 50 OUTLET
[INFILTRATION]
;;Subcatchment Param1 Param2 Param3 Param4 Param5
;;-------------- ---------- ---------- ---------- ---------- ----------
SC1 10 10 4 7 0
SC2 10 10 4 7 0
[OUTFALLS]
;;Name Elevation Type Stage Data Gated Route To
;;-------------- ---------- ---------- ---------------- -------- ----------------
OL 0 FREE NO
[TIMESERIES]
;;Name Date Time Value
;;-------------- ---------- ---------- ----------
TS 1:00 10
TS 2:00 0
[REPORT]
;;Reporting Options
SUBCATCHMENTS ALL
NODES ALL
LINKS ALL
[COORDINATES]
;;Node X-Coord Y-Coord
;;-------------- ------------------ ------------------
OL 11 14
[VERTICES]
;;Link X-Coord Y-Coord
;;-------------- ------------------ ------------------
[Polygons]
;;Subcatchment X-Coord Y-Coord
;;-------------- ------------------ ------------------
SC1 10 12
SC1 10 2
SC1 0 2
SC1 0 12
SC2 22 12
SC2 22 2
SC2 12 2
SC2 12 12
[SYMBOLS]
;;Gage X-Coord Y-Coord
;;-------------- ------------------ ------------------
RG 11 0
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