owllogovertThe 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.

Institutions or libraries that require a Licensing Agreement, click here.


 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.

 

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The June 2014 Watershed Science Bulletin explores different types of BMP media additives and their phosphorus removal capability.  Read now!

 

The Spring 2014 issue of Runoff Rundown has arrived.  Read now!

 

The latest blog from SWEMA and Gene LeManna urges a more balanced approach of green and grey in stormwater treatment.

 

Need to develop an IDDE program? Read the guidance.

 

NEW! Two versions of the Watershed Treatment Model (WTM) released to help users estimate benefits from a wide range of stormwater runoff and pollutant removal practices. Download your FREE COPY of the WTM and User's guide.

 

Onancock parking lot soaks up rain for a cleaner creek. Learn More...