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Title: Predicted high-water elevations for selected flood events at the Albert Pike Recreation Area, Ouachita National Forest

Author: Marion, D.A.;

Date: 2012

Source: Gen. Tech. Rep. SRS-164. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 58 p.

Publication Series: General Technical Report (GTR)

Description: The hydraulic characteristics are determined for the June 11, 2010, flood on the Little Missouri River at the Albert Pike Recreation Area in Arkansas. These characteristics are then used to predict the high-water elevations for the 10-, 25-, 50-, and 100-year flood events in the Loop B, C, and D Campgrounds of the recreation area. The peak discharge and related roughness characteristics of the June 11, 2010, flood are determined using detailed field survey data and iterative slope-area modeling, while standard step modeling is used to assess the fit of computed to observed high-water elevations. Results show that the peak discharge during the flood was 35,600 cubic feet per second in the upper portion of the Loop D Campground, and 40,800 cubic feet per second in the lower portion of the Loop D and all of the Loop B and C Campgrounds. Peak discharges for the 10-, 25-, 50-, and 100-year flood events are computed using regional-regression equations. Standard step modeling of high-water elevations for the 10-, 25-, 50-, and 100-year discharges shows that the Loop C and D Campgrounds are located at or below the 10-year flood elevation, and that the Loop B Campground is located close to the 25-year flood elevation. The elevations of the Loop B, C, and D Campgrounds averaged 1 to 7 feet below the computed 100-year flood high-water elevations.

Keywords: 100-year flood, Albert Pike Recreation Area campground, Manning n estimation, peak discharge, regional-regression equation, slope-area method, standard step method

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Citation:


Marion, D.A. 2012. Predicted high-water elevations for selected flood events at the Albert Pike Recreation Area, Ouachita National Forest. Gen. Tech. Rep. SRS-164. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 58 p.

 


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