WRIA 26 Cowlitz Watershed Water Availability Story Map Journal:

More Information:

Story Map Journal Questions or Comments :

Matt Rakow
Department of Ecology SWRO-WRP

WRIA 26 Cowlitz Watershed Water Availability

The Cowlitz Watershed located in western Washington includes the Cowlitz River and numerous tributary creeks and streams, several of which originate in the Cascade Mountains and Willapa Hills.  The annual precipitation in the Cowlitz Watershed ranges from 40 inches in the lower Cowlitz Valley to over 120 inches in the Cascade Mountains. Most of the precipitation falls during the winter months when water demands are the lowest.  Only a fraction of this annual precipitation becomes available for human and economic uses.

During the summer, the snowpack is gone, there is little rain, and naturally low stream flows are dependent on groundwater inflow.  At the same time, the demand for human uses, including irrigation, are at the yearly maximum.  This means that groundwater and surface water are least available when water demands are the highest.

WRIA 26 Cowlitz Watershed Water Availability Story Map Journal

The WRIA 26 Cowlitz Watershed Water Availability Story Map Journal incorporates Ecology's traditional WRIA 26-Cowlitz Watershed Water Availability Focus Sheet with numerous watershed specific data sets to create an interactive and simple-to-use web application.  After the introductory slide, each journal entry uses a separate ESRI ArcOnline web map to present data.

Data sets used to create this Story Map Journal include:

Access and Use Constraints

Information provided on Ecology's Web sites is accurate to the best of Ecology's knowledge and is subject to change on a regular basis, without notice. Ecology, the Washington Department of Fish and Wildlife (WDFW), and United State Geologic Survey (USGS) cannot and does not warrant that the information on this Web site is absolutely current, although every effort is made to ensure that it is kept as current as possible. Ecology cannot and does not warrant the accuracy of these documents beyond the source documents, although every attempt is made to work from authoritative sources. Links to related sites are provided as a courtesy, but Ecology is not responsible for their availability, content or policies.