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Last modified
1/26/2010 4:18:54 PM
Creation date
2/19/2008 2:39:57 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.400
Description
Colorado River Operations and Accounting - Deliveries to Mexico
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
6/1/1999
Author
Environmental Defense Fund
Title
A Delta Once More - Restoring Riparian and Wetland Habitat in the Colorado River Delta - Environmental Defense Fund - 06-01-99
Water Supply Pro - Doc Type
Report/Study
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<br />Nevertheless, despite its diminished state, the delta <br />plays a significant ecological role that goes far beyond <br />its bounds. For migratory birds, the delta is a key stop- <br />over along the Pacific Flyway (Payne et ai., 1992), and it <br />supports large numbers of wintering waterfowl. <br />Although resident and migratory bird densities have not <br />been studied extensively, the delta is considered a key <br />element of the flyway, and the only significant fresh- <br />water wetland among the Mexican Pacific Coast marshes <br />(See Appendix A for a list of birds recorded in the delta). <br />Species under threat elsewhere in the Colorado basin <br />still find refuge in the delta, which is also home to the <br />largest known populations of two endangered species, <br />the desert pupfish and the Yuma clapper rail (Glenn et <br />aI., 1996). Delta marshes still have the capacity to <br /> <br />Photo 1. Rio Hardy <br /> <br />provide nursery habitat for marine life that, in turn, <br />supports other marine life across the entire upper Gulf. <br /> <br />Significant riparian areas and wetlands include: <br /> <br />. riparian areas along the Colorado River from the <br />border to the delta (82,000 acres [33,000 hal), which <br />have recovery potential, in part because gallery <br />forests of cottonwood and willow have shown a <br />capacity for self-restoration during recent floods; <br /> <br />. the Rio Hardy fRio Colorado wetlands, an area that <br />fluctuates with floods and was recently measured at <br />23,719 acres (9600 ha), in the western delta near the <br />confluence of the Rio Hardy and the Colorado, <br />supported by flows from the Rio Hardy and <br />Colorado River flood flows; <br /> <br /> <br /> <br /> <br /> <br />./" -{.At-. ! <br />'~'oM'" ,;-1 <br />.' .r;,. <br /> <br />6 <br />
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