BREAK IN THE LOWER COLORADO

The Lower Colorado River : A Western System

--A historic look at the Colorado River will illustrate the dras­ tic effects of human activity on most Western rivers. Engineering features for the management of water and electric power have resulted in increased evapora­ tion, associated salinity, and other physicochemical changes; drastic reduction in many native plant and animal populations; increasing populations of intro­ duced species; ...

Planform channel dynamics of the lower Colorado River: 1976–2000

In the past two decades, major flood events have occurred on the lower Colorado River, a dramatic shift from the low flows and moderate floods associated with prior decades of river regulation. This study uses repeat aerial photography and Geographic Information System analysis to examine the planform channel response of the upper Colorado River delta (limitrophe reach) to this recently altered...

New directions in research on the Bouse Formation and the origins of the lower Colorado River

e goal of this paper is to pose research questions that may help resolve controversies about the depositional setting of the ~ 5–6 Ma Bouse Formation and paleohydrology of the earliest Colorado River system. We also summarize and update a recent Geosphere paper (Crossey et a., 2015) that discusses the application of multiple geochemical tracers (87Sr/86Sr, [Sr], δ13C, δ18O) for understanding ca...

[university of Colorado at Colorado Springs,colorado Springs, Colorado]

Accumulation and perchlorate exposure potential of lettuce produced in the Lower Colorado River region.

The Colorado River is contaminated with perchlorate concentrations of 1.5-8 microg/L, an anion linked to thyroid dysfunction. Over 90% of the lettuce (Lactuca sativa L.) consumed during the winter months in the United States is produced in the Lower Colorado River region. Studies were conducted in this region to survey the potential for lettuce perchlorate accumulation and estimate potential hu...