Implementation Guidance for the Control of Undesirable Vegetation on Dredged Material

摘要

The purpose of this technical note is to provide guidance for implementing selected management practices to control undesirable vegetation on dredged material. Dredged material is normally removed from navigable waterways or from aquatic environments and placed in confined disposal facilities (CDFs) or in other upland environments. Natural colonization is allowed, although in many cases undesirable vegetation such as Phragmites communis (common reed), Salix sp. (willow), Populus sp. (poplar and cottonwood), Bidens bipinnata (Spanish needle), and/or Pennisetum purpureum (napier grass) becomes established. Recently, CDFs have filled, and new CDFs are extremely difficult to find. Removal and beneficial use of dredged material are becoming more desirable to provide storage space for future dredged material. However, undesirable vegetation has interfered with CDF operations and the potential beneficial use of dredged material as a high-quality material. Elimination of undesirable vegetation will enhance the quality of the dredged material for use in beneficial products such as manufactured topsoil, engineered soil capping material, building blocks, and construction flow able fill. Under the Dredging Operations and Environmental Research program, demonstration projects were conducted to develop management strategies to control undesirable weedy vegetation on dredged material.