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Last modified
1/25/2010 6:45:45 PM
Creation date
10/5/2006 12:30:12 AM
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Floodplain Documents
County
Statewide
Basin
Statewide
Title
Design of Open Channels
Date
10/1/1977
Prepared By
USDA Soil Conservation Service
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />e <br /> <br />e <br /> <br />e <br /> <br />2-29 <br /> <br />of several measurable factors. The factors cited in Rating Charts A- <br />C below were developed from research and preference studies cited <br />at the end of this Appendix. These charts must be used within a local <br />frame of reference and must be verified by citizen participation. For <br />example, water carrying sediment may appear relatively muddy or clear <br />depending on the appearance of other streams within the area. <br /> <br />The Rating Charts A-C below rank VR values into only two groups, <br />high or low. One or more middle groups do exist between high and low. <br />These charts should be expanded into at least three groups and the <br />criteria shifted to fit the locale. For example, crystal clear water <br />(Chart B, item 1) may not exist in a locale. In that case, the clearest <br />water for the locale should be rated as a high value visual resource <br />and all other water clarity rated in comparison to it. Investigation <br />of VR values include, but is not limited, to identifying and/or mapping <br />the existing landscape as to the following. <br /> <br />RATING CHART A: Visual Resources of Streamway and Surrounding Landscape <br /> <br />Rural Areas <br /> <br />High Value Visual Resource <br /> <br />Low Value Visual Resource <br /> <br />(1) Adjacent landscape has no <br />linear patterns, no agricultural <br />activity, few or no manmade <br />structures. <br /> <br />(1) Adjacent landscape contains <br />many linear forms and <br />patterns, (other channels, <br />transmission lines, field <br />patterns). <br /> <br />(2) Stream way has the major <br />trees in the landscape <br />providing the only variety <br />and spatial definition to <br />surrounding landscape. <br /> <br />(2) Streamway provides no <br />spatial definition or variety <br />to surrounding landscape. <br /> <br />(3) Surrounding landscape <br />has no visual detractors <br />(strip mining, derelect <br />lands, erosion, etc.) and/or <br />is highly maintained with obvious <br />care for its appearance. <br /> <br />(3) Surrounding landscape <br />has obvious visual detractors. <br /> <br />247-9270_78 - 3 <br />
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