Improved levee resilience through soil application of a natural organic polymer; field study : Kaufman Levee No. 1

Abstract

The Kaufman Levee No. 1 rehabilitation project is under the jurisdiction of the U.S. Army Corps of Engineers (USACE) Fort Worth District. Three areas along the levee, from river mile 445 to river mile 452, were damaged and experienced slope failure as the result of high energy flows in

Biopolymer Production in the Aquifer of a Groundwater Pump-and-Treat System

“…EPS influences a number of biofilm characteristics that microbes rely on to develop and maintain communities. Some of the functions of EPS within biofilms include the following: water retention, including moisture retention in a solid matrix (Larson et al 2012(Larson et al , 2016(Larson et al , 2019; surface adhesion and self-adhesion of cells into biofilms (Sutherland 2001); formation of protective barriers, enhanced scavenging of anions and cations from bulk liquid and surfaces, and nutrient accumulation (Laspidou and Rittmann 2002); enhanced growth rates and resistance to antibiotics and disinfectants (Goldberg 2002); greater local diversity, physical protection, and stabilization (Chen et al 1998); and providing a framework for coordinated behavior (Bais et al 2006). This framework includes intercellular communications to promote adaptation to rapidly changing environmental conditions (Kjelleberg and Molin 2002) such as nutrient deficient conditions (Koch et al 2001).…”