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Decadal-Scale Analysis of Coastal Landslides Along the Big Sur Coast: Rates and Processes. Open file rept.
| 题名： | Decadal-Scale Analysis of Coastal Landslides Along the Big Sur Coast: Rates and Processes. Open file rept. |
| 作者： | GREEN, K. R.; HAPKE, C. J. |
| 关键词： | *Coastal-highways.;Rates-; Processes-; Short-term-movement-rates; California-. |
| 摘要： | Landslides in the coastal mountains of Big Sur in Monterey and San Luis Obispo Counties are common, especially during the winter months. These frequent landslides regularly disrupt Coast Highway 1, by blocking the highway with boulders and/or debris, or undercutting the roadway. Historical documentation of landslide activity in this area indicates slide activity closed portions of the road prior to its completion in 1937. The California Department of Transportation (Caltrans) maintains the Coast Highway 1 corridor and recently established the Big Sur Coast Highway Management Plan (CHMP) to develop management practices that will best maintain the highway while minimizing impact on the near shore environment of the Monterey Bay National Marine Sanctuary (MBNMS) just offshore. One issue of concern is that deposition of the landslide material in the MBNMS may have a negative impact on near shore biological communities. The purpose of the present study is to document the rates and processes of landslide movement and sediment delivery along three specific landslides: Hurricane Point, Big Slide-Pitkins Curve, and Grayslip. The primary goals of the research are to quantify the short-term (decadal) rate of movement of material within each of the landslide complexes, to analyze how the landslide evolves morphologically through time, and to produce decadal-scale maps of distribution of losses and gains in the landslide to determine how much sediment is deposited into the MBNMS (or removed by trucking). |
| 报告类型： | 科技报告 |
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