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Site Assessments & Mapping

Site Assessments & Mapping

  • This 2008 report summarizes an inventory of tamarisk and Russian olive infestations on all the major rivers and their main tributaries in Colorado. The report  was completed by the Tamarisk Coalition for the Colorado Water Conservation Board. The purpose of this work was to 1) establish and implement an inventory protocol that would be economical to perform, 2) provide a relatively accurate understanding of the extent of the tamarisk problem in Colorado, 3) develop water and wildlife habitat impacts, and 4) estimate the cost of restoration.

  • In an effort to proactively protect water quality, Colorado has implemented Best Management Practices (BMPs) for forestry activities. BMPs are a set of water-quality protection measures and guidelines that provide direction on planning, roads, Streamside Management Zones (SMZs), timber harvesting, pesticides and fertilizers, stream crossings and fire management.  
    In September 2012, an interdisciplinary team visited six timber-harvest sites in southwest Colorado to assess Colorado forestry BMP application and effectiveness. Each site was evaluated on planning, roads, SMZs, timber harvesting, hazardous substances, stream crossings and fire management, according to written criteria in the Field Audit Rating Guide.
  • This 57-page guide from the Salt Lake County Watershed Planning & Restoration Program  explores the basics of protecting water quality, streamside habitat, and property values. While written for the Salt Lake area, the information contained in this guide is applicable to a wide range of landowners. 

    In this guide you’ll find out how you and your neighbors can:

    • Prevent or minimize erosion problems
    • Avoid flood losses
    • Protect property values
    • Preserve water quality
    • Contribute to the survival of fish and wildlife
  • The Santa Cruz River and other riparian areas in the watershed have long been the backbone of the region’s natural and cultural heritage. This rich history is highlighted in the State of the Santa Cruz River.
    The companion document, State of the Santa Cruz River – Conservation Inventory, aims to acknowledge the numerous conservation efforts underway throughout the region that promote watershed health as well as protect and restore the river. Understanding the “who”, “what”, and “where” of conservation efforts is crucial to fostering collaboration and ensuring long-term conservation success. Recognizing conservation priorities is also vital to success. 
  • This website enables users to use search functions to identify unknown weed species. 

  • Using high-resolution  multitemporal, multispectral data, the authors classified tamarisk defoliation in the Glen Canyon area in Arizona. The high spatial resolution classification provides key information to effectively inform restoration treatments regarding where and how much mechanical removal or controlled burning could be performed. Furthermore, the defoliated tamarisk classification can help understand the site-specific and spatially-variable relationship between tamarisk and the tamarisk beetle at this critical state when their interactions are still developing and currently unknown. 

  • Rapid Monitoring Protocol used in the DRRP

  • The purpose of the Stream Stewardship and Recovery Handbook is to create an educational resource for private landowners to better understand their streamside properties in the context of the larger watershed, what they can do to practice good stream stewardship and when/how they should engage outside help for stewardship or recovery projects.

  • A great deal of effort has been devoted to developing guidance for stream restoration and rehabilitation. The available resources are diverse, reflecting the wide ranging approaches used and expertise required to develop stream restoration projects. To help practitioners sort through all of this information, a technical note has been developed to provide a guide to the wealth of information available. The document structure is primarily a series of short literature reviews followed by a hyperlinked reference list for the reader to find more information on each topic. The primary topics incorporated into this guidance include general methods, an overview of stream processes and restoration, case studies, and methods for data compilation, preliminary assessments, and field data collection. Analysis methods and tools, and planning and design guidance for specific restoration features, are also provided. This technical note is a bibliographic repository of information available to assist professionals with the process of planning, analyzing, and designing stream restoration and rehabilitation projects. 
  • Vegetation response to invasive Tamarix control in southwestern U.S. rivers: a collaborative study including 416 sites

    Gonzalez et al. 2017

    Most studies assessing vegetation response following control of invasive Tamarix trees along southwestern U.S. rivers have been small in scale (e.g., river reach), or at a regional scale but with poor spatial-temporal replication, and most have not included testing the effects of a now widely used biological control. We monitored plant composition following Tamarix control along hydrologic, soil, and climatic gradients in 244 treated and 172 reference sites across six U.S. states. This represents the largest comprehensive assessment to date on the vegetation response to the four most common Tamarix control treatments. Biocontrol by a defoliating beetle (treatment 1) reduced the abundance of Tamarix  less than active removal by mechanically using hand and chain-saws (2), heavy machinery (3) or burning (4). Tamarix abundance also decreased with lower temperatures, higher precipitation, and follow-up treatments or Tamarix  resprouting. Native cover generally increased over time in active Tamarix removal sites, however, the increases observed were small and was not consistently increased by active revegetation. Overall, native cover was correlated to permanent stream flow, lower grazing pressure, lower soil salinity and temperatures, and higher precipitation. Species diversity also increased where Tamarix was removed. However, Tamarix treatments, especially those generating the highest disturbance (burning and heavy machinery), also often promoted secondary invasions of exotic forbs. The abundance of hydrophytic species was much lower in treated than in reference sites, suggesting that management of southwestern U.S. rivers has focused too much on weed control, overlooking restoration of fluvial processes that provide habitat for hydrophytic and floodplain vegetation. These results can help inform future management of Tamarix-infested rivers to restore hydrogeomorphic processes, increase native biodiversity and reduce abundance of noxious species.

    Key words: Diorhabda; exotic species control; management

  • Authors: Anna A. Shera, Hisham El Waera, Eduardo Gonzáleza,b, Robert Andersona, Annie L. Henrya, Robert Biedrona, PengPeng Yuea

    This report includes a comprehensive and detailed analysis of the vegetation response to a single watershed-scale restoration effort that includes 40 sites along the Dolores River from 2010-2014.

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