Southwest Biological Science Center

Glen Canyon Dam Adaptive Management Program (GCDAMP)

The Grand Canyon Monitoring and Research Center (GCMRC) is the science provider for the Glen Canyon Dam Adaptive Management Program (GCDAMP), and its scientists study the effects of Glen Canyon Dam operations on the resources of Grand Canyon. More information about the GCDAMP can be found at the Bureau of Reclamation and the GCDAMP Wiki page. Neither of these sites are US Geological Survey (USGS) websites, so accessing those sites means you will leave the USGS website and will be entering other domains. 

Bureau of Reclamation, GCDAMP Page

Bureau of Reclamation, GCDAMP Page

The Bureau of Reclamation's web page for the Glen Canyon Dam Adaptive Management Program contains a wealth of information on Glen Canyon Dam and the Adaptive Management Program (GCDAMP).  This will take you to a site not maintained by the USGS.

BOR GCDAMP

GCDAMP Wiki Pages

GCDAMP Wiki Pages

An unofficial, yet valuable resource for all things related to the adaptive management program, including how the adaptive management process works, recent meetings, and more.  This site is not maintained by USGS or any other government entity.

GCDAMP Wiki
Filter Total Items: 28
Date published: December 8, 2016
Status: Active

Grand Canyon Sandbar Monitoring

Since the completion of Glen Canyon Dam in 1963, the amount of sand supplied to Grand Canyon National Park has been reduced by more than 90 percent. The Paria River, a tributary to the Colorado River 15 miles downstream from the dam, is now the single most important supplier of sand to the Colorado River within the Park. This large reduction in sand supply has resulted in substantial decrease...

Contacts: Paul Grams, Ph.D., Robert Tusso, Keith A Kohl, Joseph E. Hazel, Jr., Daniel Buscombe, Matt Kaplinski
Date published: December 8, 2016
Status: Active

Adaptive Management

In 1996, the Secretary of the Interior signed a formal decision altering the historical flows from Glen Canyon Dam and establishing the Glen Canyon Dam Adaptive Management Program (GCDAMP). In the context of the management of Glen Canyon Dam, adaptive management was selected to create a process whereby “the effects of dam operations on downstream resources would be assessed and the results of...

Date published: December 5, 2016
Status: Active

Sediment Storage in the Colorado River

The sandbars exposed along the shoreline of the Colorado River represent only a small fraction of the sand deposits in Grand Canyon, most of which are on the bed of the river in eddies and the channel. Current management practice includes efforts to maintain and build sandbars by releasing high flows from Glen Canyon Dam that are timed to coincide with periods of fine-sediment supply from...

Date published: December 5, 2016
Status: Active

Aquatic Insects

Aquatic insects live in the water as larvae most of their lives, then emerge onto land for a brief period as winged adults. Sampling these emerged adults on land is therefore a useful tool for understanding the condition of the aquatic insect population that is in the water, particularly in large rivers where sampling the larvae on the river bed is impractical. Our group uses a variety of...