H2OMAP SWMM Calibrator
fully automates and greatly simplifies the traditional
calibration process, making urban drainage model
calibration a remarkably easy and enjoyable task.
H2OMAP SWMM Calibrator considers any combination
of flow, depth, and/or velocity measurements, quickly
adjusting user-selected model parameters to best
reflect what is actually occurring in the system.
Five distinct groups of urban drainage network parameters,
and any of their combination, can be automatically
determined. These are:
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Subcatchment
groups such as subcatchment runoff parameters
and groundwater parameters including area,
width, percent imperviousness, slope, Manning's
N for pervious and impervious subareas, depression
storage for pervious and impervious subareas,
Colorado Urban Hydrograph Procedure parameters
such as length, centroid distance, CIA fraction,
RPA fraction, lag time for Natural Resources
Conservation Service's dimensionless and triangular
unit hydrograph method, groundwater flow coefficient,
surface water flow coefficient, groundwater
flow exponent, surface water flow exponent,
surface-groundwater interaction coefficient).
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Soil
groups (i.e., infiltration parameters) including
Horton's Infiltration parameters such as maximum
infiltration rate, minimum infiltration rate,
decay rate, drying time, maximum volume; Green-Ampt
parameters such as suction, conductivity,
initial deficit and Curve Number parameters
such as curve number, conductivity, and drying
time. |
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Aquifer
group including porosity, wilting point, field
capacity, conductivity, conductivity slope,
tension slope, upper evaporation fraction,
lower evaporation depth, bottom elevation,
water table elevation, and unsaturated zone
moisture. |
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RDII
group (i.e., RDII unit hydrograph parameters)
including R, T, and K for short-term, medium-term,
and long-term responses. |
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Conduit
group which includes the Manning's roughness
coefficient. |
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The parameters are not allowed to exceed the maximum
or be less than their minimum physically-meaningful
limits.
Extremely flexible and powerful, H2OMAP SWMM Calibrator
offers various goodness-of-fit evaluation criteria
including:
| • |
Simple
Least Square Error |
| • |
Mean
Least Square Error |
| • |
Root
Mean Square Error |
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| • |
Nash-Sutcliffe
Efficiency Criterion |
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Modified
Coefficient of Efficiency |
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Deviation
in total volume of observed and simulated
values |
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First
Dimensionless Form of Simple Least Square
Error |
| • |
Dimensionless
Form of Root Mean Square Error |
Calibration can be performed considering:
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Entire
time series (i.e., all available measurements) |
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Only
peak values ( i.e., measurements exceeding
desired threshold) |
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Only
low values (i.e., measurements less than desired
threshold) |
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Results can be summarized using:
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Graphical
Comparison of measured and simulated values |
| • |
Correlation
plot of simulated and measured values |
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Statistical
summary for every measurement site |
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All Goodness-of-fit evaluation
criteria described above are reported for
every measurement site
Basic statistics such as mean and standard
deviation of observed data as well as simulated
values are reported
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In summary, H2OMAP SWMM Calibrator
allows wastewater engineers to generate credible
models to help them optimize system performance
and capital improvement programs while saving
a tremendous amount of time and money, and without
sacrificing accuracy or ease of use.
Application Dependent
- H2OMAP SWMM Suite.
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