ICatchmentNamData Properties

Additional parameters for the NAM catchment. These parameters are not used for the calculation, but can be used to calculate parameters for the catchment

Additional constant flow added to the total runoff Unit: [m3/s] Default: 0

Total area of catchment

Autocalibration

Variable holding the base temperature defining if the precipitation is snow or rain (T0). Type: temperature Unit: [celcius] Default: 0.0

Variable expressing at which ground water depth the capilar flux is 1 mm/day when the lower zone is completely dry (GWLfl1). Type: Ground water depth Unit: [meter] Default: 0.0

Geometry of the catchment. This is a list of coordinates defining a closed polygon as the extent of the catchment.

Catchment name

The name is not unique, there may be several catchment models for one catchment, however all catchments with the same name should/must share the same catchment geometry.

The central point of the catchment. Used for e.g. finding the rain time series closest to this catchment.

Variable holding the constant degree day coefficient (Csnow). Type: Melting Coefficient Unit: [mm/Celcius/day] Default: 2.0

The ground water depth at which the base flow equals zero (GWLBF0). Constant value, used when UseSeasonalGwDepthForZeroBaseFlow is false

Type: Ground water depth. Unit: [meter]. Default: 10.

Variables holding the seasonal crop coefficientsas read from the file Type: Dimensionless factor Unit: [] Default: 1

Used only when UseCropCoeffsAndLosses is set.

End time of catchment simulation - the latest time for which the catchment can return data

Variable holding the chainage of the external river delivering irrigation water.

Variable holding the name of the external river delivering irrigation water Type: River Name Default: Blank

This variable holds the ratio between ground water reservoir and the catchment area (Carea). It is multiplied with the baseflow after updating the groundwater depth with infiltration. Type: Dimensionless factor Unit: [] Default: 1

This flag tells if the catchment should be divided into elevation zones used when ice modelling is included. Default: false

This flag determines if a radiation coefficient should be use in the calculation. Default: false

This flag decides if a rainfall degree day coefficient should be used. Default: false.

This flag tells if snow is included in the calculation Default: false

Variable holding the infiltartion rate at field capacity (K0inf). Type: Infiltration Unit: [mm/h] Default: 1

Initial conditions for NAM state variables.

Variables holding the seasonal losses in percent due to evaporation as read from the file Type: Dimensionless factor Unit: [%] Default: 0

Used only when UseCropCoeffsAndLosses is set.

Variables holding the seasonal losses in percent to groundwater Type: Dimensionless factor Unit: [%] Default: 0

Used only when UseCropCoeffsAndLosses is set.

Variables holding the seasonal losses in percent to over land flow as read from the file Type: Dimensionless factor Unit: [%] Default: 0

Used only when UseCropCoeffsAndLosses is set.

Variable holding the fraction of the infiltration to the ground water that enters the lower ground water storage (CQlow). If set to zero, the lower ground water storage is not enabled. Type: Lower baseflow Unit: [percent] Default: 0.0

Holds the maximum groundwater depth corresponding to a zero base flow. Used when UseSeasonalGwDepthForZeroBaseFlow. Type: Ground water depth Unit: [meter] Default: 10

Holds the minimum groundwater depth at which the groundwater is transfered to the upper storage (GWLmin). Type: Ground water depth Unit: [meter] Default: 0

Holds the minimum groundwater depth corresponding to a zero base flow. Used when UseSeasonalGwDepthForZeroBaseFlow. Type: Ground water depth Unit: [meter] Default: 0

Catchment model ID. Unique id.

Catchment model ID. Unique id.

Variable holding the number of inidividual snow zones. When set, all snow zone parameter arrays are recreated and reset to default values. Default: 1

Observed data. Used for creating calibration plots and for auto-calibration reference data.

Coefficient for overland flow runoff (CQOF). It expresses the part of the net rainfall that run off as over land flow. Type: Dimensionless Unit: [] Default: 0.5

Variable telling the percentage of irrigation source that originates from external river. Type: Dimensionless Factor Unit: [] Default: 0

Variable telling the percentage of irrigation source that originates from local ground water. Type: Dimensionless Factor Unit: [] Default: 50

Variable telling the percentage of irrigation source that originates from local river. Type: Dimensionless Factor Unit: [] Default: 50

Number of person equivalent in the catchment, used with catchment discharge source boundary

Variable holding the radiation coefficient (Crad); Type: Dimensionless factor Default: 0.0;

Variable holding the rainfall degree day coefficient (Crain). Type: Rain Melting Coefficient per degree per time Unit: [/celcius/day] Default: 0.0

Maximum storage in the root/lower zone (L_max) Type: Storage depth Unit: [mm] Default: 100.00

This array holds the seasonal variation of the degree day coefficient (Csnow). Type: melting Coefficient Unit: [mm/celcius/day] Default: 1, 1.5, 2, 3, 4, 4.5, 4.5, 4, 3, 2, 1.5, 1

This flag determines if the seasonal variation of the degree day coefficient is specified in a time series. Default: false

Holds the relative seasonal depth used to calculated the groundwater depth corresponding to a zero base flow. Used when UseSeasonalGwDepthForZeroBaseFlow. Type: Dimensionless factor Unit: [] Default: 1

Holds the specific yield for the groundwater reservoir (Sy). Type: Dimensionless factor Unit: [] Default: 0.1

Start time of catchment simulation - the earliest time for which the catchment can return data

StormWater LIDs connected to catchment

Maximum surface/upper storage (Umax) Type: Storage Depth Unit: [mm] Default: 10.00

Root zone treshold for recharging groundwater (TG) Type: Dimensionless factor Unit: [] Default: 0

Root zone treshold for inter flow (TIF) Type: Dimensionless factor Unit: [] Default: 0

Root zone treshold for overland flow (TOF) Type: Dimensionless factor Unit: [] Default: 0

Time constant for the routing of base flow (CKBF) Type: Flow routing time constant Unit: [hour] Default: 2000

Time constant for the first linear reservoir routing (CK1), for overland and interflow. Type: Flow routing time constant Unit: [hour] Default: 10

Time constant for the first linear reservoir routing of inter flow (CKIF) Type: Flow routing time constant Unit: [hour] Default: 1000

Variable holding the time constant for routing ground water in the lower ground water reservoir (CKlow). Type: Flow routing time constant Unit: [hour] Default: 10000

Time constant for the second linear reservoir routing (CK2), for overland flow. Type: Flow routing time constant Unit: [hour] Default: 10

Time step used during the simulation by the catchment model

Flag telling if abstraction of ground water should be included. Default: false

Flag telling if seasonal crop coefficients and losses should be specified. Default: false

Flag telling if the evaporation has to be reduced by the snow cover. If False (default MIKE 11) the evaporation will be reduced by the snow cover, if True (default MIKE URBAN), full evaporation occurs even on the ground where there is snow.

The procedure is only valid when one snow zone is defined. If more than one snow zone is defined this must be false.

Type: bool. Default: False.

Flag telling if initial conditions is taken from a hotstart file Default: false

Flag telling if the irrigation module should be applied. Type: bool Default: False

This flag determines if a seasonal variation of the degree day coefficient should be used. Default: false

Flag telling if a seasonal variation of the ground water depth corresponding to zero base flow should be used. Default: false

Flag specifying if to use an independent time constant for the second linear reservoir routing (CK2), for overland flow. If set to false, the time constant for the first and the second linear reservoir will be the same, i.e. using only TimeConstantFirstReservoir

Default: true

Variables holding the areas of the different zones. Type: Catchment area Unit: [km2] Default: 0, not used in case of only one snow zone, the total catchment area is used instead.

Variables holding the dry temperature correction for the different zones. Type: Temperature correction Unit: [celcius] Default: 0

Variables holding the elevations for the different zones. These values are not used during the calculation, but used elsewhere to calculate parameters in different snow zones. Type: Elevation Unit: [meter] Default: 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000

Variables holding the maximum storage at the different zones. Excess storage is moved to lower snow zone. Type: Storage depth Unit: [mm] Default: 10000, if only one snow zone: 0.

Variables holding the maximum amount of water contained in the snow. Type: Max Water Unit: [%] Default: 0

Variables holding the smallest storage matching full coverage for the different zones Type: Storage depth Unit: [mm] Default: 100, if only one snow zone: 0.

Variables holding the precipitation correction for the different zones. Type: Precipitation correction Unit: [%] Default: 0

Variables holding the wet temperature correction for the different zones. Type: Temperature correction Unit: [celcius] Default: 0