Skip to content

Research at St Andrews

Calibration of the high pressure Cohesive Strength Meter (CSM)

Research output: Contribution to journalArticle

Author(s)

S. Vardy, J. Saunders, T.J. Tolhurst, P. Davis, David Maxwell Paterson

School/Research organisations

Abstract

Coastal erosion is an immense economic and social problem that has been receiving increased attention in recent years. A number of devices have been developed to determine the sediment stability in coastal areas: laboratory and field flumes; a range of different erosion devices; shear vanes and fall cone penetrometers. The cohesive strength meter (CSM) erosion device was developed to determine in situ the temporal and spatial variations in the erosion threshold of muddy intertidal sediments. Technological developments have enabled considerable improvements to be made to the original design over the last 15 years.

This paper describes modifications to the CSM system that extend the range of eroding pressures the device can generate, to enable measurements to be made on very stable and consolidated sediments such as saltmarshes. A recalibration of the modified device found inconsistencies in the calibration for CSM devices presently in use, therefore a completely new calibration method is presented. This calibrates the CSM jet pressure to the pressure on the surface sediment (henceforth termed the "stagnation pressure"). The stagnation pressure when erosion is detected is assumed to be a relative (but not absolute) measure of the erosion threshold. The application of the device using the new calibration under laboratory conditions on muddy sediment is also presented. The following calibration equations were generated for the individual CSM models, where y = stagnation pressure at the sediment surface (Nm(-2)) and x = jet exit pressure (kPa): Mark IV (high pressure): y = 22.652x; Mark IV (prototype): y = 8.528x; and Mark III: y = 15.844x. (c) 2007 Elsevier Ltd. All rights reserved.

Close

    Research areas

  • cohesive strength meter, CSM, intertidal sediment stability, erosion threshold, calibration, EROSION SHEAR-STRESS, INTERTIDAL SEDIMENTS, IN-SITU, STABILITY

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Sediment dynamics of natural and restored Bolboschoenus maritimus saltmarsh

    Taylor, B. W., Paterson, D. M. & Baxter, J. M., 26 Jun 2019, In : Frontiers in Ecology and Evolution. 7, 10 p., 237.

    Research output: Contribution to journalArticle

  2. Integrating field and laboratory approaches for ripple development in mixed sand–clay–EPS

    Baas, J. H., Baker, M. L., Malarkey, J., Bass, S. J., Manning, A. J., Hope, J. A., Peakall, J., Lichtman, I. D., Ye, L., Davies, A. G., Parsons, D. R., Paterson, D. M. & Thorne, P. D., 5 Jun 2019, In : Sedimentology. Early View, 20 p.

    Research output: Contribution to journalArticle

  3. Factors affecting the spatial and temporal distribution of E. coli in intertidal estuarine sediments

    Wyness, A. J., Paterson, D. M., Mendo, T., Defew, E. C., Stutter, M. I. & Avery, L. M., 15 Apr 2019, In : Science of the Total Environment. 661, p. 155-167

    Research output: Contribution to journalArticle

  4. Chemical dispersant enhances microbial exopolymer (EPS) production and formation of marine oil/dispersant snow in surface waters of the subarctic northeast Atlantic

    Suja, L. D., Chen, X., Summers, S., Paterson, D. M. & Gutierrez, T., 20 Mar 2019, In : Frontiers in Microbiology. 10, 13 p., 553.

    Research output: Contribution to journalArticle

  5. The effect of cyclic variation of shear stress on non-cohesive sediment stabilization by microbial biofilms: the role of ‘biofilm precursors’

    Chen, X., Zhang, C., Paterson, D. M., Townend, I. H., Jin, C., Zhou, Z., Gong, Z. & Feng, Q., 1 Feb 2019, In : Earth Surface Processes and Landforms. Early View, 11 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Continental Shelf Research (Journal)

    Craig Smeaton (Member of editorial board)
    2017 → …

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Related by journal

  1. Adaptations of microphytobenthos assemblages to sediment type and tidal position

    Boa-De-Jesus, B. M., Brotas, V., Ribeiro, L., Mendes, C. R., Cartaxana, P. & Paterson, D. M., 2009, In : Continental Shelf Research. 29, 13, p. 1624-1634 10 p.

    Research output: Contribution to journalArticle

  2. The effects of simulated rain on the erosion threshold and biogeochemical properties of intertidal sediments

    Tolhurst, T. J., Watts, C. W., Vardy, S., Saunders, J. E., Consalvey, M. C. & Paterson, D. M., 30 Jun 2008, In : Continental Shelf Research. 28, p. 1217-1230 14 p.

    Research output: Contribution to journalArticle

  3. Small scale temporal and spatial variability in the erosion threhold and properties of cohesive intertidal sediments

    Tolhurst, T., Defew, E. C., de Brouwer, J., Wolfstein, K., Stal, L. & Paterson, D. M., 2006, In : Continental Shelf Research. 26, 3, p. 351-362 11 p.

    Research output: Contribution to journalArticle

  4. Small-scale temporal and spatial variability in the erosion threshold and properties of cohesive intertidal sediments

    Tolhurst, T. J., Defew, E. C., de Brouwer, J. F. C., Wolfstein, K., Stal, L. & Paterson, D. M., Mar 2006, In : Continental Shelf Research. 26, 3, p. 351-362 12 p.

    Research output: Contribution to journalArticle

ID: 362235