Environmental geology of the Front Range urban corridor and vicinity, Colorado, with a section on physical properties and performance characteristics of surficial deposits and rock units in the Greater Denver area

Hansen, Wallace R.; Crosby, Eleanor; Shroba, Ralph R.

doi:10.3133/pp1230

Cited by 13 publications

(16 citation statements)

References 15 publications

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“…Creek is a tributary (basin area, 2,398 km 2 ) of the Arkansas River in south-central Colorado (Figure 1). Basin elevation ranges from 1,432 m at the confluence with the Arkansas River to 4,300 m at the summit of Pikes Peak (Hansen and Crosby 1982). Channel form alternates between braided reaches and meandering, single-thread reaches.…”

Section: Study Area-fountainmentioning

confidence: 99%

Barriers Impede Upstream Spawning Migration of Flathead Chub

et al. 2013

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Many native cyprinids are declining throughout the North American Great Plains. Some of these species require long reaches of contiguous, flowing riverine habitat for drifting eggs or larvae to develop, and their declining populations have been attributed to habitat fragmentation or barriers (e.g., dams, dewatered channels, and reservoirs) that restrict fish movement. Upstream dispersal is also needed to maintain populations of species with passively drifting eggs or larvae, and prior researchers have suggested that these fishes migrate upstream to spawn. To test this hypothesis, we conducted a mark-recapture study of Flathead Chub Platygobio gracilis within a 91-km reach of continuous riverine habitat in Fountain Creek, Colorado. We measured CPUE, spawning readiness (percent of Flathead Chub expressing milt), and fish movement relative to a channel-spanning dam. Multiple lines of evidence indicate that Flathead Chub migrate upstream to spawn during summer. The CPUE was much higher at the base of the dam than at downstream sites; the seasonal increases in CPUE at the dam closely tracked seasonal increases in spawning readiness, and marked fish moved upstream as far as 33 km during the spawning run. The upstream migration was effectively blocked by the dam. The CPUE of Flathead Chub was much lower upstream of the OHDD than at downstream sites, and <0.2% of fish marked at the dam were recaptured upstream. This study provides the first direct evidence of spawning migration for Flathead Chub and supports the general hypothesis that barriers limit adult dispersal of these and other plains fishes.

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Section: Study Area-fountainmentioning

confidence: 99%

Barriers Impede Upstream Spawning Migration of Flathead Chub

et al. 2013

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“…Altitude ranges from 4,700 ft at the confluence with the Arkansas River to 14,109 ft at the summit of Pikes Peak (source). Fountain and Monument Creeks are the two main drainages and are located in the transition of two distinctive physiographic landforms-the Front Range and the Colorado Piedmont (Hansen and Crosby, 1982)-which corresponds to two Level III ecoregions: the Southern Rockies and the Southwestern Tablelands (Omernik, 1987). The Front Range, which comprises the western onethird of the study area, is underlain by granite.…”

Section: Study Areamentioning

confidence: 99%

Temporal change in biological community structure in the Fountain Creek basin, Colorado, 2001-2008

Zuellig¹,

Bruce²,

Stogner³

2010

Scientific Investigations Report

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“…1) has a drainage area of about 926 mi 2 , and elevation ranges from about 4,700 ft at the confluence with the Arkansas River to 14,109 ft at the summit of Pikes Peak. There are two major physiographic landforms within the area-the Front Range and the Colorado Piedmont (Hansen and Crosby, 1982), which correspond to two Level III ecoregions-the Southern Rockies and the Southwestern Tablelands (Omernik, 1987). The Front Range, which comprises the western one-third of the study area, is underlain by granite.…”

Section: Description Of Study Areamentioning

confidence: 99%

Urban-Related Environmental Variables and Their Relation with Patterns in Biological Community Structure in the Fountain Creek Basin, Colorado, 2003-2005

Zuellig¹,

Bruce²,

Evans³

et al. 2007

Scientific Investigations Report

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between urban-related environmental variables and biological patterns. A conceptual model was developed that showed the influence of urban-related environmental variables and their relation to fish and invertebrate assemblages. This model should prove helpful in guiding future studies on the impacts of urbanization on aquatic systems. Long-term monitoring efforts may be needed in other drainages along the Front Range of Colorado to link urban-related variables to aquatic communities in transition zone streams. Schumm, 1981). However, in some plains streams groundwater withdrawals, irrigation canals, and off channel ponds have decreased base flow and in some instances completely dewatered channels (Cross and Moss, 1987). In Fountain Creek, base flow above the Las Vegas St. WWTF in Colorado Springs (fig. 1) is primarily sustained by groundwater discharge, but downstream from the WWTF, base flow is composed predominantly of WWTF discharge (Edelmann and others, 2002). A substantial increase in base flow was evident in the lower reaches of Fountain Creek after 1980 when trans-mountain return flows were not available for irrigation

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Environmental geology of the Front Range urban corridor and vicinity, Colorado, with a section on physical properties and performance characteristics of surficial deposits and rock units in the Greater Denver area

Abstract: FIGURE 9. Dinosaur footprint in the South Platte Formation of the Dakota Group at Alameda Parkway near Morrison. Print is about 44 cm long front to back. Sharp claw marks indicate a carnivorous dinosaur; it was walking on its toes, leaving no heel print. May 1968.

Cited by 13 publications

References 15 publications

Barriers Impede Upstream Spawning Migration of Flathead Chub

Barriers Impede Upstream Spawning Migration of Flathead Chub

Temporal change in biological community structure in the Fountain Creek basin, Colorado, 2001-2008

Urban-Related Environmental Variables and Their Relation with Patterns in Biological Community Structure in the Fountain Creek Basin, Colorado, 2003-2005

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