Download - Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN
![Page 1: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/1.jpg)
MIKE 11
Modelling the rainfall-runoff process
Available Rainfall Runoff (RR) models:
• UHM
• NAM
• SMAP
• URBAN
![Page 2: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/2.jpg)
MIKE 11
Modelling the rainfall-runoff process (NAM)
RAINFALL
POTENTIAL EVAPORATION
MODEL PARAMETERS
RUNOFF COMPONENTS
EVAPORATION
RECHARGE
![Page 3: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/3.jpg)
MIKE 11
NAM : “nedbør-afstrømnings model”
Describes the land phase of the hydrological cycle
The NAM is a lumped, conceptual model:
• lumped catchment regarded as one unit.parameters are average values
• conceptual based on considerations of thephysical processes
Similar models: Stanford, SSARR, HBV, SMAR,..
![Page 4: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/4.jpg)
MIKE 11
Types of Application
• General hydrological analysis - runoff distribution - estimates of infiltration / evaporation• Flood Forecasting - subcatchment inflow to river model - links to meteorological models• Extension of streamflow records - advanced gap-filling - improved basis for extreme value analysis etc.• Prediction of low flow - for irrigation management - for water quality control
![Page 5: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/5.jpg)
MIKE 11
equations
The NAM Model
![Page 6: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/6.jpg)
MIKE 11
NAM, Initial conditions
• Initial Water Content of Surface and Root zone storages
• Initial values for Overland flow and Interflow
• Initial Groundwater Depth
Data to be specified:
Recommended to disregard the first half year or so of the results to eliminate erroneous Initial Conditions!
![Page 7: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/7.jpg)
MIKE 11
NAM, Model Calibration
• Water balance in system
• Runoff hydrographs, peak and shape
• Comparison of Runoff results with observations
Most NAM Parameters of empirical nature=> values must be determined by Calibration:
Generally recommended to change only one parameter between each run !
![Page 8: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/8.jpg)
MIKE 11
NAM, Model Calibration
1. Manual Step-by-step procedure (changing one variable at a time)
2. Autocalibration Automatic optimisation routine using multi-objective optimisation strategy. 4 objectives:
1) Overall Volume error (= water balance)
2) Overall root mean square error (= hydrograph shape) 3) average root mean square error of peak flow events4) average root mean square error of low flow events
Easy to use - BUT EVALUATION OF VARIABLE VALUES
REQUIRED TO JUDGE HYDROLOGICAL SENSIBILITY
![Page 9: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/9.jpg)
MIKE 11
NAM simulation, Liver creek
![Page 10: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/10.jpg)
MIKE 11
RR Parameter editor
Editor-file: *.rr11
Editing of Model-specific parameters for Rural Catchments :
NAM Model-specific parameters comprise:
• Surface, Root-zone and Snow melt data
• Ground water data
• Initial Conditions
• Irrigated Area
![Page 11: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/11.jpg)
MIKE 11
RR Parameter editor (NAM)
Example:
Surface-Rootzone variables
![Page 12: Modelling the rainfall-runoff process Available Rainfall Runoff (RR) models: UHM NAM SMAP URBAN](https://reader036.vdocuments.us/reader036/viewer/2022062404/551b7778550346a6148b5295/html5/thumbnails/12.jpg)
MIKE 11
RR Input to HD Simulation
Inclusion of Runoff results in River model:
1) RR-simulation (produce RR Result-file)
2) Specify Catchment definitions in Network Editor(input to single points or distributed along reach)
3) Specify RR Result-filename in Simulation Editor