Ra—Riverby

Ra—Riverby gravelly sandy loam, frequently flooded

Map Unit Setting

  • National map unit symbol: kpwm

  • Elevation: 600 to 700 feet

  • Mean annual precipitation: 52 to 60 inches

  • Mean annual air temperature: 57 to 61 degrees F

  • Frost-free period: 190 to 200 days

  • Farmland classification: Not prime farmland

Map Unit Composition

  • Riverby and similar soils: 70 percent

  • Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Riverby

Setting
  • Landform: Flood plains

  • Landform position (three-dimensional): Tread

  • Parent material: Gravelly alluvium derived from interbedded sedimentary rock

Typical profile
  • H1 - 0 to 12 inches: gravelly sandy loam

  • H2 - 12 to 60 inches: extremely gravelly coarse sandy loam

Properties and qualities
  • Slope: 0 to 3 percent

  • Depth to restrictive feature: More than 80 inches

  • Natural drainage class: Excessively drained

  • Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)

  • Depth to water table: About 48 to 60 inches

  • Frequency of flooding: Frequent

  • Frequency of ponding: None

  • Available water storage in profile: Low (about 3.6 inches)

Interpretive groups
  • Land capability classification (irrigated): None specified

  • Land capability classification (nonirrigated): 4s

  • Hydrologic Soil Group: A

  • Hydric soil rating: No

 


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