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## Calculating Runoff using TOPMODEL (M6)

Authors: Owners: This resource does not have an author who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource. This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource. Resource The size of this resource is 54.2 MB Oct 21, 2019 at 6:07 p.m. Jun 07, 2021 at 4:34 p.m. 10.4211/hs.ea30176c717d4b7baeb85c16427f1d6f See how to cite this resource Geographic Feature Content  Geographic Raster Content
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### Abstract

This resource contains data inputs and an iPython Jupyter Notebook used to simulate semi-distributed variable source area runoff generation in a tributary to the Logan River. This resource is part of the HydroLearn Physical Hydrology learning module available at https://edx.hydrolearn.org/courses/course-v1:Utah_State_University+CEE6400+2019_Fall/about.

In this activity, the student learns how to (1) calculate the topographic wetness index using digital elevation models (DEMs) following up on a previous module on DEMs and GIS in Hydrology; (2) apply TOPMODEL concepts and equations to estimate soil moisture deficit and runoff generation across a watershed given necessary watershed and storm characteristics; and (3) critically assess concepts and assumptions to determine if and why TOPMODEL is an appropriate tool given information about a specific watershed.

Please note that this exercise sets up the data needed to estimate runoff in the Spawn Creek watershed using TOPMODEL. Spawn Creek is a tributary of the Logan River, Utah. This exercise uses some of the same data as the Logan River Exercise in Digital Elevation Models and GIS in Hydrology at https://www.hydroshare.org/resource/9c4a6e2090924d97955a197fea67fd72/. If running the TOPMODEL for other study sites, you need to prepare a DEM TIF file and an outlet shapefile for the area of interest.
- There are several sources to obtain DEM data. In the U.S., the DEM data (with different spatial resolutions) can be obtained from the National Elevation Dataset available from the national map (http://viewer.nationalmap.gov/viewer/). Another DEM data source is the Shuttle Radar Topography Mission (https://www2.jpl.nasa.gov/srtm/), an international research effort that obtained digital elevation models on a near-global scale (search for Digital Elevation at https://www.usgs.gov/centers/eros/science/usgs-eros-archive-products-overview?qt-science_center_objects=0#qt-science_center_objects).
- If not already available, you can generate the outlet shapefile by applying basic terrain analysis steps in geospatial information system models such as ArcGIS or QGIS.

### Coverage

#### Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
North Latitude
42.1128°
East Longitude
-111.4569°
South Latitude
41.6622°
West Longitude
-111.8177°

### Data Services

The following web services are available for data contained in this resource. Geospatial Feature and Raster data are made available via Open Geospatial Consortium Web Services. The provided links can be copied and pasted into GIS software to access these data. Multidimensional NetCDF data are made available via a THREDDS Data Server using remote data access protocols such as OPeNDAP. Other data services may be made available in the future to support additional data types.

### Related Resources

 This resource is referenced by Lane, B. A. & Garousi Nejad, I. (2019), Physical Hydrology, HydroLearn, https://edx.hydrolearn.org/courses/course-v1:Utah_State_University+CEE6400+2019_Fall/about The content of this resource is derived from The TIF file, LoganDEM.tif, is the Digital Elevation Model (DEM) data of the Logan Watershed. LoganDEM.tif data was obtained from the National Elevation Dataset available from the national map (http://viewer.nationalmap.gov/viewer/). The content of this resource is derived from The shapefile, SpawnOutlet.shp, is retrieved from terrain analysis processes.

### Credits

#### Funding Agencies

##### This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation (NSF) Collaborative Research: Improving Student Learning in Hydrology & Water Resources Engineering by Enabling the Development, Sharing and Interoperability of Active Learning Resou 1726965
National Science Foundation (NSF) Collaborative Research: Improving Student Learning in Hydrology & Water Resources Engineering by Enabling the Development, Sharing and Interoperability of Active Learning Resou 1725989
Utah State University Open Educational Resources (OER) Grant

### How to Cite

Garousi-Nejad, I., B. Lane (2021). Calculating Runoff using TOPMODEL (M6), HydroShare, https://doi.org/10.4211/hs.ea30176c717d4b7baeb85c16427f1d6f

This resource is shared under the Creative Commons Attribution CC BY.