Online Watershed Library (OWL)

The Online Watershed Library (OWL) is a service provided by the Center for Watershed Protection that allows ready access to Center publications and other resources (research papers, tools, and stormwater manuals, among others) that support best practices in watershed and stormwater management. OWL is a searchable, online database of basic information, stormwater and watershed manuals and plans, assessment tools, regulatory information, and other watershed-related resources. Users may also submit materials for inclusion in the OWL.

OWL was developed to be a time-saver for watershed and stormwater practitioners as it provides users access to a well-organized database of relevant and up-to-date information. Due to copyright protection, not all publications included in OWL are available for download and in such circumstances, a link to the publication is provided.

Browse Free
Center publications

All Center for Watershed Protection publications) can now be accessed using OWL. Electronic publications may be downloaded or order hard copies.

Attention: If you have downloaded free publications in the past, a login is no longer required. For access to the full Online Watershed Library(OWL), you can buy an annual subscription or join CWPA which includes a free annual subscription to OWL.

Click here to browse free Center publications.

Browse OWL

I’m a CWPA member

Begin your search now if you are a CWPA member with your login information.

Click here to login to the Member's Area and browse the complete Online Watershed Library (OWL).

Subscribe to OWL

I’m not a CWPA member

Non-CWPA members may purchase a subscription for $39.99/year to access the complete set of resources available in OWL.

Click here to register for an OWL subscription

Upload a document

to be included in OWL

CWPA members or OWL subscribers may upload a publication

Click here to login to OWL and upload a document.

Welcome to our new website! AWSPs is now CWPA. Learn more...

The Spring issue of the Watershed Science Bulletin on Green Infrastructure is here!

Get the Runoff Rundown on the Center’s latest projects in our April newsletter issue

Hye Yeong Kwon, Executive Director, blogs about green infrastructure.

Latest News

Upcoming Events

Fri May 31
Dave Hirschman, Program Director, teaches bio-retention systems at Stormwater Management Workshop

Wed Jun 19 @12:00 - 02:00PM
Webcast:Mastering the Language of Talking to Elected Officials

Wed Sep 18 @12:00 - 02:00PM
Webcast: Combining Green & Grey In Combined Sewer Watersheds

Wed Oct 16 @12:00 - 02:00PM
Webcast: Stormwater Trading - Markets or Mayhem

Wed Nov 20 @12:00 - 02:00PM
Webcast: Stormwater Utilities: Reckoning the Cost Side of the Equation

Other Center Websites

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