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<br /> <br />COLORADO <br />FLOODPLAIN AND STORMWATER CRITERIA MANUAL <br /> <br />Chapter 8 - Mappinq Standards and Modernization <br /> <br />The recornrnended rninimum standards (accuracy, scale, contour interval, etc,) of <br />mapping and field survey data for use in floodplain analyses and delineations are <br />provided in this chapter, This chapter also provides practical guidelines for converting <br />existing floodplain delineations on hard copy maps into a digital format and <br />preparation of new digital floodplain boundaries that are compatible with the GIS <br />format for later incorporation into D-FIRMs. <br /> <br />Chapter 9 - Hvdroloqv <br /> <br />This chapter presents three hydrologic modeling approaches (synthetic, statistical, <br />and regional regression) and their common applications for different hydrologic and <br />watershed conditions. <br /> <br />Various synthetic hydrologic modeling methods and computer programs <br />recommended for use in determining the rainfall and runoff information for different <br />hydrologic and watershed conditions are discussed. The guidelines for use of <br />statistical and regional regression methods for various conditions are also provided. <br /> <br />Chapter 10 - Hvdraulic Analysis <br /> <br />Three hydraulic analysis approaches (field check, limited, and detailed) and modeling <br />methods and applications are presented in this chapter. <br /> <br />The field check method describes simple techniques that could be used in the field to <br />estimate channel capacity and flood flow rates without the use of computer aided <br />programs. Recommended methods and guidelines for preparation of limited and <br />detailed hydraulic and floodplain analyses of natural and manmade open <br />channel/river systems are also provided. <br /> <br />Chapter 11 - Floodplain Delineation <br /> <br />Recommended methods and techniques for delineation of limited and detailed <br />floodplain and f100dway boundaries are provided in this chapter, The recommended <br />delineation procedures outlined in this chapter are compatible with the FEMA FIS <br />pubiications. BFE's, flood profiles, and other related delineation topics are discussed <br />in this chapter. <br /> <br />Chapter 12 - Unique Hvdraulic Conditions <br /> <br />Practical analysis and design guidelines for areas with unique hydraulic conditions <br />will be provided in this chapter in the future. Specifically, this chapter will deal with <br />hydraulic evaluation of alluvial fans, mud and debris flow, irrigation-stormwater <br />interaction, ice jam, and erosion control and setback zones, <br /> <br />Chapter 13 - Desiqn of Hvdraulic Structures <br /> <br />Currently, this chapter provides recommended minimum criteria for hydraulic design <br />of open channels, bridges and culverts, dams and reservoirs, and levees, <br />Recommended design criteria for detention basins, drop structures, and recreational <br />structures will be provided in the future. When appropriate, references are made to <br />existing hydraulic and design manuals and guidelines for more detailed discussions, <br /> <br />MARCH 2004 - Draft <br /> <br />EXECUTIVE SUMMARY <br />