Calculating Runoff / Streams using DEM in ArcGIS

How do I create a stream from a DEM in ArcGIS?

Stream Order or River Network using DEM Map in ArcGIS

1. Open Fill, select Input file- Dem Map, choose Output Destination and write the name, then click OK.
2. Open Flow Direction, select Input file- Fill, choose Output Destination and write the name, then click OK.

How do I calculate stream order in ArcGIS?

Quote from video: Now if you zoom in it's actually going to be a bit more visible. All right now what you can do in order to generate the stream. Order is you can go back to your toolbox. And there's this option called

What is the formula for calculating runoff?

The Rational Formula is expressed as Q = CiA where: Q =Peak rate of runoff in cubic feet per second C =Runoff coefficient, an empirical coefficient representing a relationship between rainfall and runoff.

How do you calculate total runoff volume?

To calculate the runoff from any given rainfall:

1. Take the dimensions of the footprint of your roof and convert them to inches. (So, a 50′ x 20′ roof is 600″ x 240″.)
2. Multiply the roof dimensions by the number of inches of rainfall. (In this example, 600″ x 240″ x 1″ = 144,000 cubic inches of water.)

How do you convert DEM to slope in ArcGIS?

Create a slope map from the DEM layer.

1. Navigate to System Toolboxes > Spatial Analyst Tools > Surface > Slope.
2. Select the output of the Topo to Raster tool as the input raster.
3. Specify the location of the output raster.
4. Select the output measurement.
5. Click OK. A slope map is created from the DEM layer.

What can you do with a DEM in ArcGIS?

Digital elevation models (DEMs) are geospatial datasets that contain elevation values sampled according to a regularly spaced rectangular grid. They can be used in terrain analysis, 3D visualizations, and hydrological modelling, among other applications.
 

How do you calculate stream flow?

Multiply the average depth of the stream by the width of the stream to find the area in ft2. Divide the distance traveled by the average travel time to find the velocity of the stream in ft/sec.

How do you determine stream order?

A 1st order stream has no other streams flowing into it. When two streams with different orders join, the resulting stream has the same order as the highest order of the two joining streams. For example, when a first and second order stream join, the resulting stream is second order.

How do you measure the flow of a stream?

Quote from video:

How do you create an elevation from a DEM?

Click the Elevation Point Attribute drop-down arrow and specify the field where you want to insert the new point’s elevation value. Click within the DEM on the map to create a new elevation point. The point is created and selected in the map. to save the point features you just created.

Can we convert map into stream?

Converting complete Map into Stream: This can be done with the help of Map. entrySet() method which returns a Set view of the mappings contained in this map. In Java 8, this returned set can be easily converted into a Stream of key-value pairs using Set. stream() method.
 

How do you extract a cross section from a DEM?

The tool can use your existing line layer to extract the profile from the raster data.



1 Answer

1. Select the raster image.
2. Add Layer.
3. From the drop-down list select Selected Polyline.
4. Select the line layer.
5. Select the line in the map view the one above the raster image.