ANewMethod forZoning ofCoastalBarriersbased onHydro-geomorphological andClimateCriteria

Document Type: Original Research Paper

Authors

Dep. Mec. Est. e Ing. Hidráulica – Instituto delAgua, University of Granada, Spain. Instituto del Agua, c/ Ramón yCajal, 4,Granada 18071, Spain

Abstract

This paper presents a new methodology for the zoning of littoral sand barriers on the basis of
their groundwater dynamic responses to the local mean water level (MWL) climate. The method is based on
the comparison of the characteristic scales of the horizontal drainage and recharge processes. Using the
Boussinesq equation and basic hydro-geomorphological parameters, this methodology identifies the climatic
events that markedly affect the groundwater dynamics across the barrier, along with the location of the most
affected cross sections. The application of the methodology to the Mar Menor sand barrier shows that a
significant number of cross sections can be particularly vulnerable to the effects of local storm events typical
of the Mediterranean coast during the spring and winter seasons. The location of the affected cross sections is
analyzed as a function of both the local MWL forcing and hydrogeological parameters. This case study
highlights the possible use of the proposed methodology for land use planning and the environmentalmanagement
of coastal sand bars.

Keywords