Guidance for Design Hydrology for Stream Restoration and Channel Stability (2017) / Chapter Skim
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42 C h a p t e r 5 This chapter presents two examples of using the CSR Tool. One example is a sand-bed river using U.S.
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Figure 5-1. Map of Big Raccoon Creek watershed in Indiana (Indiana Department of Environmental Management 2013)
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Figure 5-3. Selecting "Stream Type" on "Startup" tab.
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Figure 5-5. Selecting "Hydrology Info" on "Startup" tab.
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46 Guidelines for Design hydrology for Stream restoration and Channel Stability Hydrology Results This example uses the default 25 bins to sort the data, which are displayed in Column D under "Bin #" (Figure 5-8)
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CSr tool examples 47 Figure 5-8. "Hydrology" tab, Big Raccoon Creek example results.
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48 Guidelines for Design hydrology for Stream restoration and Channel Stability flow record. The total effectiveness or total sediment transported per day on average in a given year is the sum of the individual effectiveness for each bin which is displayed at the bottom of Column Q
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CSr tool examples 49 5.1.4 Design Reach Tab The required inputs, denoted by red asterisks, are entered for the design reach (Figure 5-10)
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50 Guidelines for Design hydrology for Stream restoration and Channel Stability to find associated slopes that will produce CSR = 1. The default minimum of 3 ft is used to produce a full family of solutions.
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CSr tool examples 51 Planform Characteristics The outputs for planform calculations are displayed in Columns R through W in Figure 5-11. Column R is the width versus bankfull depth based on the bank height specified on the design reach tab.
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52 Guidelines for Design hydrology for Stream restoration and Channel Stability for each stable channel solution. Columns B and C of the tab give a summary of the average discharge of each bin used for the supply and design reach calculations and the supply reach effectiveness for each bin.
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CSr tool examples 53 Figure 5-14. "Startup" tab of the CSR Tool.
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54 Guidelines for Design hydrology for Stream restoration and Channel Stability Figure 5-15. Selecting "Stream Type" on "Startup" tab.
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CSr tool examples 55 Figure 5-17. Selecting "Hydrology Info" on "Startup" tab.
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Figure 5-19. "Startup" tab with "Start New Project" defined.
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CSr tool examples 57 5.2.3 Grain Size Distribution Tab The "Grain Size Distribution" tab (Figure 5-21) is displayed and required for this example because it is a "Gravel/Cobble" bed stream type.
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58 Guidelines for Design hydrology for Stream restoration and Channel Stability the geometric standard deviation (sg) ; Row 7 shows the sand fraction, which in this example is 0.1 or 10%.
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CSr tool examples 59 Figure 5-22. "Supply Reach" tab, Red River example results.
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60 Guidelines for Design hydrology for Stream restoration and Channel Stability the "effectiveness" or the estimated sediment transported per day by each bin discharge on average in a given year based on the probability of daily flows in the flow record. The total effectiveness or total sediment transported per day on average in a given year is the sum of the individual effectiveness for each bin which is displayed at the bottom of Column Q
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CSr tool examples 61 to find slope and width combinations that balance the sediment capacity of the supply and design reach and produce CSR = 1. This will create a "Results" tab and a "Detailed Results" tab.
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62 Guidelines for Design hydrology for Stream restoration and Channel Stability the dimensions and channel characteristics were matched for the supply and design reach to verify the accuracy of the program output. If these characteristics are matched, then the bottom width and slope of the supply reach should be a solution in the family of stable channel design solutions because the same channel could pass the same sediment yield.
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CSr tool examples 63 5.2.7 Detailed Results Tab In addition to the "Results" tab, a "Detailed Results" tab (Figure 5-27) is created when the CSR analysis is run.
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