Much of the flat land adjacent to the Arkansas River is very poorly drained, and artificial drains have been installed on much of the agricultural land. A narrow strip along the eastern edge of the county, ranging in width from 6 miles at the north county line to 1 mile at the south county line, is drained by east-flowing tributaries of the Walnut River.

The North Fork and South Fork Ninnescah rivers join in the southwestern part of the county to form the Ninnescah River which flows to the southeast and leaves the county near Clearwater. Big Slough and Cowskin Creek head in the northwestern part of the county and parallel the course of the Arkansas to join it near Derby and in northeast Sumner County, respectively. drainage is by Big Slough, Cowskin Creek, the Ninnescah River. The Little Arkansas River enters the county near the center of the north boundary, flows east-southeast, and joins the Arkansas River at Wichita. The Arkansas River enters the county at the north-west corner, flows in a southeasterly direction to a point north of Wichita where it turns south, and leaves near the southeast corner. Geological Survey and dates are those of last revision of sheets.ĭrainage of the county is by way of the Arkansas River and its tributaries. Names are official quadrangle names of the U.S. 4).įigure 3-Map of Kansas showing physiographic divisions (from Schoewe, 1949).įigure 4-Outline map of Sedgwick County, Kansas, showing areas covered by modern 7 1/2-minute quadrangle topographic maps. Modern 7 1/2-minute topographic maps are available for all of the county (Fig. The lowest point, about 1,220 feet above sea level, is where the Arkansas River leaves the county to the south. The highest point in the county, about 1,540 feet above sea level, is on its west edge, about 5 miles southwest of Andale.

The topography of the county is characterized by the extreme flatness of the broad Arkansas River valley and the gently rolling slopes rising to the uplands adjacent to the valley. The location of the county with respect to other physiographic areas of the State is shown in Figure 3. Sedgwick County, with the exception of the northeast corner, lies within the Arkansas River Lowlands section of the Central Lowland physiographic province (Schoewe, 1949).

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