Soil Amendment Guidance for Infiltration and Stormwater Treatment

Details

• Creators:
  Mohanty, Sanjay K. ; Stenstrom, Michael K. ; Das, Tonoy K. ; Tummala, Chandra
• Corporate Creators:
  University of California, Los Angeles. Department of Civil and Environmental Engineering
• Corporate Contributors:
  California. Department of Transportation
• Subject/TRT Terms:
  Best Practices Drainage Highway Design Hydrology Infiltration Pollutants Roadside Sand Soil Aggregates Soil Compaction Soils By Properties

  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; California
• Corporate Publisher:
  California. Department of Transportation
• Abstract:
  Pollutants from roadway runoff are the leading cause of surface water impairments. Thus, treatment of road runoff by building roadside stormwater best management practices (BMPs) could prevent pollution and turn the road infrastructure into a sustainable water solution. However, limited infiltration in compacted roadside soil poses a significant challenge to designing roadside BMPs. To overcome this challenge, roadside or curbside soil where compaction is required could be mixed with amendments to alleviate the negative impact of compaction and increase infiltration and stormwater treatment. Compaction could decrease the amendment’s particle size if it crumbles under pressure. Furthermore, the amendment amount could vary based on soil hydraulic properties. This study aims to provide selection guidance for amendments and their quantity to achieve stormwater treatment goals in curbside soil where compaction is required for road design. To create a study that is representative of all California soil types, soils were collected within Caltrans Right of Way (ROW) from 8 sites, with two soil sites from each of the four hydrologic soil groups (HSG) A, B, C, and D. The selected physical, geotechnical, and chemical properties of all soils were measured to verify their HSG type. All soils exhibited a limited infiltration capacity under compaction and contained low organic carbon, indicating amendments were needed to improve their capacity to infiltrate stormwater and remove pollutants.
• Format:
  PDF
• Funding:
  65A0715
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9c4f0eca23ad449a768fe6d8290e7881cf5aa500866e8bc464d30b80462e0c85fdcda043f9b0b717400d3768c90a2f6724689d23a527048a469d4362c2e727d8
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/90478/dot_90478_DS1.pdf
• File Type:
  [PDF - 8.17 MB ]