Comparisons of Simulation Results Using the NWS Hydrology Laboratory's Research Modeling System
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Comparisons of Simulation Results Using the NWS Comparisons of Simulation Results Using the NWS Hydrology Laboratory's Research Modeling SystemHydrology Laboratory's Research Modeling System
(HL-RMS)(HL-RMS)
Hydrology LaboratoryHydrology LaboratoryOffice of Hydrologic DevelopmentOffice of Hydrologic DevelopmentNational Weather Service/NOAANational Weather Service/NOAA
Ziya Zhang, Victor Koren, Ziya Zhang, Victor Koren, Seann Reed, Michael Smith, and David WangSeann Reed, Michael Smith, and David Wang
HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
What is HL-RMS?What is HL-RMS?
A Research Modeling System being developed
by researchers in the Hydrology Laboratory,
Office of Hydrologic Development, NWS/NOAA.
Modeling framework for testing lumped, semi-
distributed, and fully-distributed hydrologic
modeling approaches.
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
HL-RMS ComponentsHL-RMS Components
Pre-simulation:
Determines connectivity matrix
Derives SAC parameters
Derives routing parameters
Simulation:
Simulates rainfall/runoff for each grid (SAC, ...)
Conducts hillslope and channel routing
Computes hydrographs
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
HL-RMS CapabilitiesHL-RMS Capabilities
Ingests NEXRAD Stage III xmrg data
Uses lumped or distributed model parameters
Uses lumped or distributed precipitation
Computes hydrographs at any interior points
Selection between lumped, semi-distributed, and
fully distributed modes
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
HL-RMS CapabilitiesHL-RMS Capabilities cont.
Output Arc/Info grids for selected variables
Flexible to modify gridded parameters
Modular design to test other models
Computational element: NEXRAD 4km HRAP grid
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Test BasinTest Basin
Blue River Basin
Oklahoma
Missouri
Kansas
Arkansas
Texas
Area: Area: 12331233 km km22Area: Area: 12331233 km km22
Blue River Basin, OKBlue River Basin, OK
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Test RunsTest Runs
Lumped parameters from manual calibration, lumped forcing
Distributed parameters, distributed forcing
Scaled distributed parameters, distributed forcing
Continuous Simulation from 1993 to 2000Continuous Simulation from 1993 to 2000
Scale factor was based on comparing a calibrated value of a basin to an averaged value of gridded values of that basin
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Samples of Gridded ParametersSamples of Gridded Parameters
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Test ResultsTest Results Distributed Channel RunoffDistributed Channel Runoff
Channel Runoff (cms)Channel Runoff (cms)November 7, 1996 22:00
outlet
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
November 7, 1996 7:00 - 8:00November 7, 1996 7:00 - 8:00
Test ResultsTest Results Rainfall & Surface RunoffRainfall & Surface Runoff
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Test ResultsTest Results Hydrographs @ Interior PointsHydrographs @ Interior Points
BasinOutlet
A
B
C
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
BasinOutlet
A
B
C
Test ResultsTest Results Hydrographs @ Interior PointsHydrographs @ Interior Points
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
outlet
Total Precipitation (mm)An Event in 1994An Event in 1994An Event in 1994An Event in 1994
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
outlet
Total Precipitation (mm)
An Event in 1995An Event in 1995An Event in 1995An Event in 1995
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
outlet
Total Precipitation (mm)
An Event in 1996An Event in 1996An Event in 1996An Event in 1996
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
An Event in 1997An Event in 1997An Event in 1997An Event in 1997
outlet
Total Precipitation (mm)
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
outlet
Total Precipitation (mm)
An Event in 1998An Event in 1998An Event in 1998An Event in 1998
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
outlet
Total Precipitation (mm)
An Event in 1999An Event in 1999An Event in 1999An Event in 1999
Test ResultsTest Results Hydrograph ComparisonHydrograph Comparison
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
ObservationsObservations
Simulations using HL-RMS in distributed mode without any calibration effort yields better results than calibrated lumped simulations at most times
Distributed modeling yields much better results for events where rainfall has big variation across a basin
Distributed simulation results are better when the SAC parameters are scaled based on calibrated parameters
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
Rainfall distribution has the biggest effect on differences between lumped and distributed simulations
Derived gridded rainfall-runoff and routing parameters are reasonably good
Use of only gridded parameters yields higher peaks in hydrographs
Recession part of simulated hydrographs is off the most compared to observed discharges
ObservationsObservations cont.
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HYDROLOGY LABORATORY, OHD/NWS/NOAAHYDROLOGY LABORATORY, OHD/NWS/NOAA
ObservationsObservations cont.
HL-RMS is a workable and a flexible research tool to study hydrologic processes, and to test the sensitivity of model parameters and input forcing on simulations