Platte River Management Joint Study Final Report

• File Number: 8461.100
• Description: Adaptive Management Workgroup
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 7/20/1990
• Author: Biology Workgroup
• Title: Platte River Management Joint Study Final Report
• Water Supply Pro - Doc Type: Report/Study

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Table 8.• Percentage of acres in open channel, riverine grassland, and cropland
habitat in 14 bridge segments. The change in tYie availability of open channel
and grassland since pre-settlement times is indicated in the columns labeled ?
loss. Averages for the Big Bend (segments 1-11) and the North Platte (segments
12-14) are shown below each column.
$ CHANNEL -% UPLAND
Channel. % woody
_ ----- x 100
loss %.total
channel beach/bar
Grassland loss ='% cropland
± $ development divided by
$ total + $ development x
100 . herbaceous Grassland Upland Woads
-tcomplex shrubs open
Develop- water
Segment Acres ment Total Open Woody Loss Total Grass Crop Loss
1 58,374 7.8 10.2 3.9 6.3 61.7 82.0 22.4 59.6 75.0
2 36,215 11.0- 7.1 2.8. 4.3 60.6 83.3 18.4 64.9 80.0
3 35,926 12.2 6.7 2.8 3.9 58.2 81.2 27.4 53.8 70.6
4 25,454 4.8 7.4 3.0 4.4 59.5 87.7 27.1 60.6 70.7
5 41,872 4.6 7.8 2.5 5.3 67.9 67.5 18.6 68.9 79.8
6 28,180 5.1 8.4 2.9 5.5 65.5 86.4 • 17.9 68.5 80.4
7 29,700 4.6 9.0 2.7 6.3 70.0 86.4 27.9 58.5 69.3
8 35,005 11.4 9.3 2.9 6.4 68.8 79.5 20.4 59.1 77.6
9 42,407 6.7 10.3 2.6 7.7 74.8 81.1 39.2 41.9 56.3
10 29,928 5.1 12.3 2.4 9.9 50.5 82.6 .33.2 49.4 62.1
11 54,637 5.6 12.6 3.4 9.2 73.0 81.9 27.8 54.1 68.2
Mean 417,698 7.4 9.2 2.9 6.3 67.3 83.6 25.5 58.1 71•8
12 75,892 14.0 6.8 1..5 5.3 77.9 79.1 58.8 20.3 36.8
13 38,967 3.6 6.0 1.9 4.1 68.3 90.3 63.7. 26.6 32.2
14 63,910 2.5 4.9. 2.2 2.7 55.1 92.5 71.5 21.0 24.7
Mean 178,769 6.7 5.9 1.9 4.1 67.1 87.3 . 64.7 22.0 31.2