NWM Flood Extent Forecast

Description

Download NWM timeseries Q data and construct floodplain extent (floodplain polygons) of the downloaded Q by applying JoinFeatures on the downloaded timeseries data with precomputed Flood Stack dataset (FloodDS).

Usage

Parameters

Parameter Name	Type	Direction	Data Type	Dialog Reference
Input FPRiver	Required	Input	Feature Layer	River lines with fields [feature_id, HydroID] where feature_id=COMID
Input FPZoneRiver	Required	Input	Feature Layer	floodplain on river with 86 dhs, (dh=0.3048), fields = [StreamID,HIndex,HValue,CompositeID], CompositeID=StreamID*100+HIndex
Input Rating Curve Lookup Table	Required	Input	Table View	pf_ModelStream, whose [Q, H] fields are used as rating curve Q->H.
Slice Increment	Required	Input	Double	Slice_Increment (=0.3048), delta_h used to create the floodds dataset.
Input NWM Forecast Type	Required	Input	String	Short Range = Short_Range Forecast with forecast of 1 hr interval for 18 hrsMedium Range = Medium_Range Forecast with forecast of 3 hrs interval for 80 hrs.
Output NWM Time Series Table Name	Required	Input	String	NWM Q Time series table name - the downloaded time series would be stored in the same workspace of FPRiver.
Output Floodplain TS Dataset	Required	Output	Feature Layer	Output floodplain extent polygons