Preprints
https://doi.org/10.5194/nhess-2021-16
https://doi.org/10.5194/nhess-2021-16

  19 Feb 2021

19 Feb 2021

Review status: this discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). The manuscript was not accepted for further review after discussion.

Evolution of the Tazones Lighthouse slope (Cantabrian coast, N Spain). Multidisciplinary monitoring between 2018 and 2020

María José Domínguez-Cuesta1, Pelayo González-Pumariega2, Pablo Valenzuela3, Carlos López-Fernández1, Manuel Mora4, Mónica Meléndez5, Fernando Herrera1, Miguel Ángel Marigil6, Luis Pando1, José Cuervas-Mons1, and Montserrat Jiménez-Sánchez1 María José Domínguez-Cuesta et al.
  • 1Department of Geology, University of Oviedo, Oviedo, Spain, Oviedo, 33005, Spain
  • 2Department of Mining Exploitation and Prospecting, University of Oviedo, Mieres, 33600, Spain
  • 3Tecnologías y Servicios Agrarios, Tragsatec S.A., León, 24008, Spain
  • 4Delegación Territorial en Castilla y León, Agencia Estatal de Meteorología, Valladolid, 47014, Spain
  • 5Oficina de Oviedo, Instituto Geológico y Minero de España, Oviedo, 33005, Spain
  • 6Delegación de Asturias, Instituto Geográfico Nacional, Oviedo, 33007, Spain

Abstract. The Tazones Lighthouse slope shows different active mass movements affecting an area of 70.000 m2 of the Cantabrian Coast (N Spain), characterized by almost vertical rocky cliffs developed on Jurassic rocks: alternating marl, sandstone and limestone with three main stratigraphic and structural discontinuity families. Between June 2018 and May 2020, 22 monthly monitoring campaigns have been carried out to measure the displacement of 38 control points, located between 95–110 masl. The total station monitoring has been complemented by ortophoto analysis and detailed digital terrain models (DTM) from two drone flights. Since the beginning of the 3D monitoring, about the 50 % of the markers moved more than 1 m, one of them exceeding 15 m. Detailed DTM has shown that the increased activity is controlled by the discontinuities. There is an extraordinary correlation between displacement acceleration and precipitation and soil moisture: the largest displacements have occurred after 2 periods of intense rain (January and October–November 2019, with a maximum 24-hour precipitation of 64.5 mm and 82.1 mm, respectively, and soil moisture values higher than 90 %). This represents an exceptional opportunity to analyse in real time the Jurassic cliffs retreat of the Cantabrian Coast, a question that remained not quantified.

María José Domínguez-Cuesta et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-16', Alan Trenhaile, 21 Feb 2021
    • AC1: 'Reply on RC1', María José Domínguez-Cuesta, 09 Mar 2021
    • AC3: 'Reply on RC1', María José Domínguez-Cuesta, 05 Apr 2021
  • RC2: 'Comment on nhess-2021-16', Anonymous Referee #2, 08 Mar 2021
    • AC2: 'Reply on RC2', María José Domínguez-Cuesta, 09 Mar 2021
    • AC4: 'Reply on RC2', María José Domínguez-Cuesta, 05 Apr 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-16', Alan Trenhaile, 21 Feb 2021
    • AC1: 'Reply on RC1', María José Domínguez-Cuesta, 09 Mar 2021
    • AC3: 'Reply on RC1', María José Domínguez-Cuesta, 05 Apr 2021
  • RC2: 'Comment on nhess-2021-16', Anonymous Referee #2, 08 Mar 2021
    • AC2: 'Reply on RC2', María José Domínguez-Cuesta, 09 Mar 2021
    • AC4: 'Reply on RC2', María José Domínguez-Cuesta, 05 Apr 2021

María José Domínguez-Cuesta et al.

María José Domínguez-Cuesta et al.

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Short summary
We are a multidisciplinary research group interested in the study of landscape dynamics and its interaction with human communities. At present, we are working in a project concerning with the evolution of the Cantabrian Coast cliffs. One of the studied areas is the Jurassic coast in which the Tazones Lighthouse slope is located. This represents an exceptional opportunity to analyse in real time the Jurassic cliffs retreat of the Cantabrian Coast, a question that remained not quantified.
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