Investigating the Applicability of Biotechnical Streambank Stabilization in Texas PDF Download
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Author: Harlow C. Landphair
Publisher:
ISBN:
Category : Riparian areas
Languages : en
Pages : 67
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Book Description
The Texas Department of Transportation has commonly utilized concrete and other non-biodegradable measures to stabilize stream channels throughout Texas. This research project investigated an alternative stabilization method specifically geared toward the warm regions of Texas, which utilizes live plant materials combined with inert materials such as geosynthetics and rocks to provide protection of streambanks or slopes. In this project, researchers designed five demonstration projects and conducted plant dormancy extension experiments on black willow (Salix nigra). Two of five designed projects were let, and only one project was built. Researchers found that in biotechnical engineering, live plant cuttings are harvested and planted in the dormant period. Texas's short dormant periods make biotechnical construction scheduling very difficult. Following the definition of short dormant period in Texas, researchers conducted the dormancy extension research, which investigated the possibility of extending the dormancy window of live cuttings for construction of biotechnical techniques.
Author: Harlow C. Landphair
Publisher:
ISBN:
Category : Riparian areas
Languages : en
Pages : 67
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Book Description
The Texas Department of Transportation has commonly utilized concrete and other non-biodegradable measures to stabilize stream channels throughout Texas. This research project investigated an alternative stabilization method specifically geared toward the warm regions of Texas, which utilizes live plant materials combined with inert materials such as geosynthetics and rocks to provide protection of streambanks or slopes. In this project, researchers designed five demonstration projects and conducted plant dormancy extension experiments on black willow (Salix nigra). Two of five designed projects were let, and only one project was built. Researchers found that in biotechnical engineering, live plant cuttings are harvested and planted in the dormant period. Texas's short dormant periods make biotechnical construction scheduling very difficult. Following the definition of short dormant period in Texas, researchers conducted the dormancy extension research, which investigated the possibility of extending the dormancy window of live cuttings for construction of biotechnical techniques.
Author: Harlow C. Landphair
Publisher:
ISBN:
Category : Bioengineering
Languages : en
Pages : 4
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Book Description
Author: Dennis Lyn
Publisher:
ISBN: 9781622603626
Category :
Languages : en
Pages :
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Book Description
A conceptual framework for the design of biotechnical streambank revetment is proposed. It is intended to be simple in practice, flexible in being widely applicable, familiar in retaining certain aspects of current practice while being patterned after other aspects, and encouraging a more environmentally sensitive approach to reliable streambank protection for INDOT projects. It distinguishes between a toe zone, where traditional hard armoring techniques such as those already included in the INDOT standard designs are more appropriate, and an upper bank zone where vegetation-based techniques would typically be applied. Default techniques are identified to simplify the choice of measures for 'routine' problems, but more case-specific techniques may also be selected. Primary techniques that offer immediate protection on their own are also distinguished from supplementary techniques that are used only in combination with other (primary) techniques. The boundary between the toe zone and the upper bank zone is proposed to be the maximum of the ordinary high water mark (or bankfull elevation), the elevation corresponding to the 2-year discharge, and the elevation corresponding to the point that is one third up the slope from the bank toe at the design discharge (for streambank protection). For the upper bank zone, for bank slopes up to 2H:1V, regrading and revegetation with herbaceous species together with the use of rolled erosion control products (RECPs) is proposed as the default. The other (non-default) main primary technique for the upper bank zone is the vegetated mechanically stabilized earth (VMSE, or vegetated reinforced soil slope VRSS, or soil lifts) option (where revegetation with herbaceous species is also considered standard). This requires more engineering and construction effort but is appropriate for those projects where a more vertical (up to maximum bank slope of 1H:1V) solution is desired. The supplementary techniques to be included are live staking to be used with the regrading option, and brush-layering to be used with the VMSE option.
Author: John Newton
Publisher:
ISBN: 9781622603602
Category :
Languages : en
Pages :
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Book Description
As part of a larger project to develop guidelines for the design of biotechnical approaches to streambank stabilization to be included in INDOT standard designs and specifications, a field assessment was undertaken of 26 sites, of which 13 were INDOT sites. Multiple techniques were frequently installed in combination, which resulted in 47 samples of 12 different techniques at the 26 sites. Each site was visited at least once and the measures were visually inspected for evidence of damage either to the measure or to the streambank being protected. Some of the field assessments were supplemented by interviews with designers involved in the INDOT projects; the general merits of biotechnical techniques were discussed together with those of specific techniques that might be included in a standard design. The assessment resulted in grouping the techniques into three broad categories: (i) typically reliable techniques that could be used where tolerance for bank instability is very low, and generally involving hard armor, (ii) potentially reliable techniques where the tolerance for bank instability is low to moderate, and (iii) techniques that are appropriate only for special circumstances or to be used only in combination with measures from the other two groups.
Author: John T. Stanley
Publisher:
ISBN:
Category : Riparian areas
Languages : en
Pages : 4
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Book Description
Author: Gary W. Wells
Publisher:
ISBN:
Category : Streambank planting
Languages : en
Pages : 4
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Book Description
Author: Angela Wright (Lynn)
Publisher:
ISBN:
Category :
Languages : en
Pages : 154
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Book Description
Author: Gary W. Wells
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Book Description
Author: Donald H. Gray
Publisher: John Wiley & Sons
ISBN: 9780471049784
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
The first comprehensive, practical guide to the selection,construction, and installation of soil bioengineering andbiotechnical slope protection Here is the ultimate guide to physically attractive,environmentally compatible, and cost-effective methods ofprotecting slopes from erosion and mass wasting. Lavishlyillustrated with more than 150 photographs and supplemented withscores of charts and tables, this book covers the entire subjectfrom general principles and background on the nature of soilerosion and mass movement to detailed information on rootstrengths, treatment selection, unit costs, critical tractivestresses, methods for harvesting and handling live cuttings, andmore. Four illustrated case studies, each addressing a different set ofproblems and solutions, demonstrate both the application ofparticular technologies and the site investigation, planning,scheduling, and organization required to complete these projectssuccessfully. This unique reference handbook * Reviews the horticultural and engineering underpinnings forbiotechnical and soil engineering treatments * Documents and explains the role of woody plants in stabilizingslopes against both surficial erosion and mass movement * Provides details on a broad range of soil bioengineering methods,including live staking, live fascines, brushlayering, live cribwalls, branchpacking, and live slope gratings * Describes various biotechnical methods and materials, includingthe incorporation of vegetation in erosion control blankets,flexible mats, cellular revetments (geocells), rock armor (riprap), and gabion and open-front crib walls * Summarizes the findings of the National ScienceFoundation-sponsored workshop to assess the state of the art anddetermine research needs For practicing professionals, researchers, and students ingeotechnical engineering, geology, soil science, forestry andforest engineering, landscape architecture, environmentalhorticulture, and restoration ecology, this book offers thorough,up-to-date coverage that is not available from any other singlesource.
Author: Harlow C. Landphair
Publisher:
ISBN:
Category : Bioengineering
Languages : en
Pages : 37
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Book Description
