Overland Flow Distance to Channel Network
(c) 2001 by O.Conrad
This module calculates overland flow distances to a channel network based on gridded digital elevation data and channel network information.
The flow algorithm may be either Deterministic 8 (O'Callaghan & Mark 1984) or Multiple Flow Direction (Freeman 1991)
References:
- Freeman, G.T., 1991: 'Calculating catchment area with divergent flow based on a regular grid', Computers and Geosciences, 17:413-22
- O'Callaghan, J.F., Mark, D.M., 1984: 'The extraction of drainage networks from digital elevation data', Computer Vision, Graphics and Image Processing, 28:323-344
Parameters
- Grid system
Grid system
- Grid system
- Elevation
Input Grid
- A grid that contains elevation data.
- Channel Network
Input Grid
- A grid providing information about the channel network. It is assumed that no-data cells are not part of the channel network. Vice versa all others cells are recognised as channel network members.
- Overland Flow Distance
Output Grid
- The overland flow distance in map units. It is assumed that the (vertical) elevation data use the same units as the (horizontal) grid coordinates.
- Vertical Overland Flow Distance
Output Grid
- This is the vertical component of the overland flow
- Horizontal Overland Flow Distance
Output Grid
- This is the horizontal component of the overland flow
- Flow Algorithm
Choice
- Choose a flow routing algorithm that shall be used for the overland flow distance calculation:
- D8
- MFD
Available choices: D8, MFD