What are the infiltration rates and runoff potential of soils in the Type D hydrologic group?

What are the infiltration rates and runoff potential of soils in the Type D hydrologic group?

• A. High infiltration and high runoff
• B. Low infiltration and high runoff
• C. Moderate infiltration and moderate runoff
• D. High infiltration and low runoff

Answer: (B)

Type D soils are characterized by their generally low infiltration rates and high runoff potential. This hydrologic group typically includes soils that have a high clay content, which can lead to poor drainage and low permeability. As a result, when rainfall occurs, these soils do not absorb water effectively; instead, they tend to allow most of the water to flow over the surface, contributing to higher runoff. Such conditions increase the likelihood of erosion and can exacerbate flooding issues in areas with Type D soils. Understanding these properties is crucial for stormwater management and erosion control, as techniques must be employed to mitigate runoff and promote better water management in these scenarios.

Type D soils are characterized by their generally low infiltration rates and high runoff potential. This hydrologic group typically includes soils that have a high clay content, which can lead to poor drainage and low permeability. As a result, when rainfall occurs, these soils do not absorb water effectively; instead, they tend to allow most of the water to flow over the surface, contributing to higher runoff. Such conditions increase the likelihood of erosion and can exacerbate flooding issues in areas with Type D soils. Understanding these properties is crucial for stormwater management and erosion control, as techniques must be employed to mitigate runoff and promote better water management in these scenarios.