|
|
|
Title: STABILIZATION OF DEBRIS FLOW SCAR USING SOIL BIOENGINEERING
Accession Number: 00625161
Record Type: Component
Availability: Find a library where document is available Abstract: On January 4, 1982, a large debris flow occurred in an undeveloped hillside and flowed into an area of residential housing in Pacifica, California. This debris flow (which originated in a previously unrecognized colluvium-filled swale) destroyed two houses approximately 300 vertical-ft below the source area and killed three children. Emergency grading and erosion control measures were soon implemented but these measures did not stop the continuing erosion. Deterioration of the temporary erosion control facilities was rapid. The magnitude of erosion from the slope also prevented vegetation from being reestablished in the scar area. In March 1988, plans were developed to regrade the source area of the debris flow (to remove additional colluvium) and install long-term soil bioengineering erosion control measures. These measures were designed to immediately reduce surficial erosion. A reduction in the surface water flow rate would allow increased infiltration into the ground and help rapid root growth of the bioengineering materials to allow root reinforcement of the upper soils. Over several years, this system would reduce the surficial erosion and allow indigenous plants in the area to become reestablished in the debris flow track. Design concepts and methods of construction are related. A long-term monitoring program is being performed by the consultants originally involved in the project to determine the success of the stabilization effort. This program consists of periodic visits to the site to walk the slopes and develop a photographic log of the vegetation development.
Supplemental Notes: This paper appears in Transportation Research Record No. 1343, Rockfall Prediction and Control and Landslide Case Histories. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Rockfall prediction and control and landslide case histories Monograph Accession #: 01404973
Language: English
Authors: Thomas, Michael RKropp, Alan LPagination: p. 101-107
Publication Date: 1992
Serial: ISBN: 0309052068
Features: Figures
(4)
; References
(2)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Construction; Design; Geotechnology; Highways; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: Oct 21 1993 12:00AM
More Articles from this Serial Issue:
|
