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MONITORING AND MODELING PEAT SOIL subsidence IN THE VENICE LAGOON

MONITORING AND MODELING PEAT SOIL SUBSIDENCE IN THE VENICE L...

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第七届国际地面沉降学术研讨会

作者： Matteo CAMPORESE Giuseppe GAMBOLATI Mario PUTTI Pietro TEATINI Maurizio BONARDI Federica RIZZETTO Luigi TOSI Stefano FERRARIS Giuseppe GASPARETTO STORI Vincenzo NICOLETTI Sonia SILVESTRI Paolo SAlandIN Dept.of Hydraulic MaritimeEnvironmentaland Geotechnical EngineeringUniversity of Padovavia Loredan 20-35131 Padova (Italy). Dept.of Mathematical Methods and Models for Scientific Applications University of Padovavia Belzoni 7-35131 Padova (Italy). Institute of Marine Sciences National Research CouncilSan Polo 1364-30125 Venezia (Italy). Dip.di Economia e Ingegneria Agraria Forestale e AmbientaleUniversity of TorinoVia L.da Vinci 44-10095 Grugliasco (Italy). Consorzio Bonifica Adige-Bacchiglione via degli Scrovegni 29-35131 Padova (Italy). Sistema Informativo-MAV San Marco 2949-30124 Venezia (Italy). Institute of Hydraulics and Road Infrastructures Polytechnic University of MarcheVia Brecce Blanche-60131 Ancona (Italy).

The Venice Lagoon is characterized by a fast morphodynamics appreciable not only over the geological scale but also in historical and modem *** lagoon environment proves very sensitive to even minor modifications of the natural and anthropogenic controlling *** important human endeavor accomplished in the past century is the reclamation of the southernmost lagoon area that has been turned into a fertile *** reclaimed soil is reach in organic matter (peat) that may oxidize with release of carbon dioxide to the *** continuous loss of carbon is causing a pronounced settlement of the farmland that lies below the present sea/lagoon *** enhances the flood hazard and impacts noticeably on the maintenance and operational costs of the drainage *** peatland subsidence is estimated at 1.5 m over the last 70 years with a current rate of 1.5-2 cm/*** geochemical reaction is primarily controlled by soil water content and temperature,and is much influenced by agricultural practices,crop rotation,and depth to the water table.A small (24 km) controlled catchment located in the area has been instrumented for accu- rately monitoring the basic parameters and recording the ground *** in situ measurements have been integrated with the combined use of remote sensing data to help cast light on the process and identify the mit- igation strategies.

关键词： organic soils peat oxidation geochemical land subsidence monitoring and modeling Venice Lagoon catchemnt

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