Accession Number : AD1011606


Title :   Evaluation of Rhizobium tropici-derived Biopolymer for Erosion Control of Protective Berms. Field Study: Iowa Army Ammunition Plant


Descriptive Note : Technical Report


Corporate Author : U.S. Army Engineer Research and Development Center Vicksburg United States


Personal Author(s) : Larson,Steven ; Nijak,Gary Jr ; Corcoran,Maureen ; Lord,Elizabeth ; Nestler,Catherine


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1011606.pdf


Report Date : 01 Jun 2016


Pagination or Media Count : 48


Abstract : A Rhizobium tropici-produced biopolymer was applied to an explosion protection berm at the Iowa Army Ammunition Plant (IAAAP) to stabilize the soil, prevent loss of berm height, reduce erosion, and increase the rate and extent of revegetation. The berm was recontoured, and a hydroseeder was used to apply biopolymer with grass seed. The control area received plain water and seed. Evaluated biopolymer application methods include: single surface application, double surface application, and a double application at depth, with the first application 2-ft below ground surface (bgs), and the second on the surface. A LiDAR (Light Detection and Ranging) survey evaluated soil movement from the berm slope over three years. The double application of the biopolymer at depth was the most effective application method as determined by calculating soil loss and surface roughness, followed closely by the double surface application. At 19 months post-treatment, a landslip was observed in the treated area that received the double surface application of biopolymer. There was no evidence of soil cracking in any other treated areas.


Descriptors :   BIOPOLYMERS , environmental protection , ARMY CORPS OF ENGINEERS , SOIL EROSION


Distribution Statement : APPROVED FOR PUBLIC RELEASE