Arkansas River Channel Capacity and Riparian Habitat Planning Study

• Description: ARCA
• State: CO
• State: KS
• Basin: Arkansas
• Water Division: 2
• Date: 8/1/2001
• Author: U.S. Army Corps of Engineers
• Title: Arkansas River Channel Capacity and Riparian Habitat Planning Study
• Water Supply Pro - Doc Type: Report/Study

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APPENDICES
A. Flood History and Damages: Chapters 1-- 4 =and reference section (pages 45 -48) of the ,
report entitled Post Flood Assessment Report, Arkansas River, Southern Colorado and dated
September 15, 1999.
B. CWCRIU'SGS Groundwater Investigation: The CWCB will prepare a summary report of
the CWCB/USGS Groundwater Investigation. The CWCB/USGS Report is also appended for
reference
C. 1999 La Juntaworth La Junta PL -99 Report
LIST OF FIGURES 1
Figure 1. General Study Area: Arkansas River Upper Reach, between Pueblo /Otero County
Line and John Martin Reservoir, Otero and Bent Counties, Colorado............ 3
Figure 2. Area View of Problem Areas, Upper peach, between Pueblo /Otero County Line and
John Martin Reservoir, Otero and Bent Counties, Colorado ..... ............................... 4
Figure 3. Bed gradations, Arkansas River and tributaries near Lamar, Colorado, ......... 25
April 1997.
Figure 4. Historic measured suspended sediment ............................. .............................30
Figure Improved channel template results .................................... .............................
Figure PZF Estimates ............................................................... ............................... 36 1
LIST OF PLATES '
Plate 1. Discharge Rating Curve at La Junta ................................. ............................... 27
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LIST OF TABLES
Table -1.
Problem areas defined in this study ................................ ...............................
3
Table 2 -1.
Annual Peak Discharges per calendar year at USGS stream gages on
the Arkansas River above John Martin Dam, 1942 to 1999 ..........................
7
Table3 -1.
Stream Gages ................................................................... ...............................
26
Table -2.
Discharge Frequency Peaks ........................................... ...............................
28
Table 3 -3.
Correlation (R2 values) of discharge versus suspended sediment .................
29
Table -4.
Manning's roughness values ............... ........................ ...............................
31
Tabl 3 -5.
Existing sediment transport rates .........:.......................... .........I.....................
32
Tabl 3 -6.
In- channel sediment transport rates ................................ ...............................
32
Table 3 -7.
Improved channel template sedimentation results .......... ...............................
33
LIST OF FIGURES 1
Figure 1. General Study Area: Arkansas River Upper Reach, between Pueblo /Otero County
Line and John Martin Reservoir, Otero and Bent Counties, Colorado............ 3
Figure 2. Area View of Problem Areas, Upper peach, between Pueblo /Otero County Line and
John Martin Reservoir, Otero and Bent Counties, Colorado ..... ............................... 4
Figure 3. Bed gradations, Arkansas River and tributaries near Lamar, Colorado, ......... 25
April 1997.
Figure 4. Historic measured suspended sediment ............................. .............................30
Figure Improved channel template results .................................... .............................
Figure PZF Estimates ............................................................... ............................... 36 1
LIST OF PLATES '
Plate 1. Discharge Rating Curve at La Junta ................................. ............................... 27
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