Hydrologic Analysis

ArcGIS Spatial Analyst contains specialized tools for working with and deriving new information from hydrologic and landscape information.

When modeling the flow of water, you need to know where the water came from and where it is going. ArcGIS Spatial Analyst provides tools to calculate flow across an elevation surface, which provides the basis for creating stream networks and watersheds, calculating flow path length, assigning stream orders, and so forth. These kinds of derived data are often used to aggregate landscape information for input to hydrologic models.

Using the Spatial Analyst hydrologic tools, this graphic shows the results of a flood forecasting model to find areas subject to flooding during a specific storm.

Using Spatial Analyst hydrologic tools, this graphic shows results of a flood forecasting model to find areas subject to flooding during a specific storm.
Click on image to enlarge

The groundwater tools can be used to perform simple 2D advection?dispersion modeling of groundwater flow and constituents in groundwater. The Darcy Flow tool generates a groundwater flow field from hydrogeological data. The Particle Track tool follows the path of advection (movement) through the flow field from a point source, and the Porous Puff tool calculates the dispersion of a chemical or constituent as it is moved along the flow path.

Available Hydrologic Analysis tools include:

Flow Accumulation
Flow Direction
Flow Length
Fill
Sink
Stream Link
Stream Order
Stream To Feature
Watershed
Darcy Flow
Particle Track
Porous Puff

Next: Raster Generalization


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