Drainage Connectivity Characterization

Description

Generates connectivity for deranged terrain through the lowest elevations on the boundaries. The tool adds links from the "center" of one drainage area to the "center" of the connected drainage areas. This link consists of one feature composed of two geometric segments - one segment starting at the "center" of one drainage area nad ending on the lowest point on the boundary between the two areas and the other segment starting at that point on the boundary and ending at the "center" of the other drainage area.

The tool works on a selected set of Drainage Boundary features or on all features if there is no selected set. It processes the selected Drainage Boundary lines characterized with IsIncluded=1 and IsDone=0.

Usage

Arc Hydro;Connectivity

Parameters

Parameter Name	Type	Direction	Data Type	Dialog Reference
Input DEM Raster	Required	Input	Raster Layer	Input DEM used to retrieve elevations.
Input Flow Direction Raster	Required	Input	Raster Layer	Input Flow Direction Grid used to generate the links from the lowest point on the shared boundaries to the catchment sink or stream confluence junction.
Input Drainage Area Feature Class	Required	Input	Feature Layer	Input drainage area features associated to drainage boundaries being processed.
Input Drainage Boundary Feature Class	Required	Input	Feature Layer	Input Drainage Boundaruy features being processed. Tool will process only features having IsIncluded=1 and IsDone=0 or Null.
Input Drainage Point Feature Class	Required	Input	Feature Layer	Input Drainage Point feature class.
Input Drainage Connectivity Table	Required	Input	Table View	Input Drainage Connectivity table storing the HydroIDs of the drainage boundaries and of the associated drainage areas (-1 for external area).
Input HydroEdge Feature Class	Optional	Input	Feature Layer	Feature class where HydroEdge features associated to the links will be stored. This feature class will be created if it does not already exist. If it already exists, new features will be appended.
Input HydroJunction Feature Class	Optional	Input	Feature Layer	Feature class where HydroJunction features associated to the links will be stored. This feature class will be created if it does not already exist. If it already exists, new features will be appended.
Input Boundary Drainage Line Feature Class	Optional	Input	Feature Layer	Feature class where Boundary Drainage Line features associated to the links will be stored. This feature class will be created if it does not already exist. If it already exists, new features will be appended.