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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/123/05/1097-1114

    • Keywords

       

      Sediment grain-size; water renewal time; bathymetry; abiotic classification; EntropyMax; lagoon.

    • Abstract

       

      Integrated classification maps were produced by combining sediment grain-size and hydrological data (water renewal time, WRT) from two Mediterranean lagoons, Lesina (LL) and Varano (LV), Italy. The geophysical characteristics of the two basins, derived from detailed bathymetric charts, are quite distinct: ∼30% of LL (mean depth ∼1 m) but only 3% of LV (mean depth ∼3 m) is shallower than 1 m. The sediments of both lagoons are mainly composed of mud (∼80%). A detailed multivariate analysis of grainsize data by EntropyMax classified the lagoon beds of LL and LV into five sedimentary facies. WRT data, computed by a hydrodynamic model, indicated different hydrological conditions in the two lagoons: LL showed a sharp west–east gradient, with a basin-wide average of ∼190 days, whilst LV showed a fairly uniform distribution and a higher basin-wide average (∼260 days). The distribution of sedimentary facies and water renewal times were combined in a composite map representing the distribution of environmental patterns. The approach outlined in this study can be used to improve zonation schemes by providing a hydromorphological perspective on transitional and coastal environments.

    • Author Affiliations

       

      Emanuela Molinaroli1 Alessandro Sarretta2 Christian Ferrarin3 4 Emanuele Masiero5 Antonietta Specchiulli6 Stefano Guerzoni3

      1. UniversitàCa’ Foscari Venezia, Dipartimento di Scienze Ambientali Informatica e Statistica, Dorsoduro 2137, 30123 Venezia, Italy.
      2. CNR–Consiglio Nazionale delle Ricerche, ISMAR – Istituto di Scienze Marine in Bologna, via Gobetti 101, 40129 Bologna, Italy.
      3. CNR–Consiglio Nazionale delle Ricerche, ISMAR – Istituto di Scienze Marine in Venezia, Castello 2737/F, 30122 Venezia, Italy.
      4. CNR–Consiglio Nazionale delle Ricerche, IAMC – Istituto per l’Ambiente Marino Costiero in Oristano, 090782 Torregrande, Oristano, Italy.
      5. Urban Planning, Via S. Martino 11-35030 Veggiano, Padova, Italy.
      6. CNR–Consiglio Nazionale delle Ricerche, ISMAR Istituto di Scienze Marine in Lesina, via Pola 4, 71010 Lesina (FG), Italy.
    • Dates

       
  • Journal of Earth System Science | News

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