SUSTAINABLE WATER RESOURCES MANAGEMENT PLANS IN THE TIBER RIVER BASIN FOR ENVIRONMENT PROTECTION, MINIMUM INSTREAM FLOWS REGULATION AND THE TRASIMENO LAKE ECOSYSTEM PRESERVATION (ITALY)
Up-dated in July 2015
Demosite description Trasimeno Lake Major Issues
* Poor water quality due to Lithology / Geochemistry irrational land management * Severe droughts due to irrational Arenaceous flysch (N), carbonate shelf water use and possible climate and pelagic deposit (E), clastic deposits change scenarios (fig.1) in the alluvial valley * Impact of drought on microbial processes in sediments and on Fig.2 - Drastic changes of the lake water level highly carbon cycling (fig 2) affect microbial processes in biofilms when sediment get dry (Courtesy of S. Fazi)
Main description: 43°06’N, 12°07’ E From the ‘Autoritá di Bacino del Social-Ecohydrological System Fiume Tevere’ archive Catchment Ecohydrological sub-system Catchment Sociological sub-system The length of the Tiber River is 405 km. Almost 90% of the Tiber River Basin is covered by the regions of Umbria and Lazio. More than 4 million people living in the basin of which 80% in the Province of Rome. EH Objectives EH Methodology Objectives Stakeholders
The basin is mainly characterized by small farms and a leading sector in the Tiber valley is hydropower * The links between the Water * Starting from scientifically * Researchers (University of generation plants concentrated in the Nera River basin. hydrological variability and the ecological processes in based knowledge, the Perugia – IRSA-CNR) Trasimeno Lake is a shallow lake which could host rare species but it is also a well-known touristic area. Since 2006, water and sediments will be objective is to biodiversity * Tiber River Authority and Biodiversity protection, stakeholder the lake is part of the international "Living Lakes". explored in areas of the river Umbrian, Tuscany and Lazio catchment with different expectations and regions administrative constraints to Apply complementary Services anthropogenic impact. * EU Water Framework Conserve Ecohydrological Enhance Ecohydrological Ecohydrological processes in high Particular attention will be achieve an integrated Directive processes in natural ecosystems processes in novel ecosystems impacted systems given at the relation between management of the * Regional Environmental Resilience water flow and water quality. catchment. Protection Agency YES NO YES Are inputs to: Set conditions for: Set conditions for: Participate in:
Ecohydrology Principles and Solutions Lifezones Life Zone ACTIVITIES Warm Temperate Dry Forest * Modelling the Decision Support System * Integrated Lake Basin Management EH * Quantification of the hydrological processes at PPT (mm/yr) T (ºC) * Development of a set of water resources evaluation and management WEB-GIS Tools (WRME project) IMPLEMENTATION catchment scale and mapping the impacts; * Trasimeno Lake Regional Park education proposals PRINCIPLES 750 13 Results EH SOLUTIONS PET ratio: 1,02 MAIN EXPECTED OUTCOME Preservation measures to minimize the periodic hydrological crisis of the Elevation: 257,33 m Trasimeno lake Humidity: sub-humid Rehabilitation of natural flows by monitoring the water LATEST RESULTS withdrawals HYDROLOGICAL FLOW The results highlight the extreme hydrological vulnerability of Lake Trasimeno in relation with climate change (for temperature, a rate of change of about +5°C century−1, and for precipitation, about −30% century−1 for the basin) between 1969-1999 (Ludovisi et al., 2013). Giardino et al. (2010) confirmed the meso-eutrophic conditions of Lake Trasimeno (average Chl-a = 8.5 mg/m3). A reduction in Integrated Lake Basin Management macrophyte beds from 2003 to 2008 was also observed. HYDROLOGICAL FLOW CLICK HERE TO SEE THE REFERENCES Fig.1-Trasimeno water crisis in Developed by: A Initiative of: 2003, lake level falls 1,85 m below gauge zero (Courtesy of S. Casadei) Stefano Casadei University of Perugia [email protected]