Consiglio Nazionale delle Ricerche

Tipo di prodottoAbstract in atti di convegno
TitoloEffects of agricultural drainage systems on sediment connectivity in a small Mediterranean lowland catchment under contrasted rainfall events
Anno di pubblicazione2018
FormatoElettronico
Autore/iAleix Calsamiglia (1,2), Julián García-Comendador (1,2), Josep Fortesa (1,2), José A. López-Tarazón (1,2,3), Stefano Crema (4), Marco Cavalli (4), Adolfo Calvo-Cases (5), Joan Estrany (1,2)
Affiliazioni autori(1) Department of Geography, University of the Balearic Islands, E-07122 Palma de Mallorca, Balearic Islands, Spain. Mediterranean Ecogeomorphological and Hydrological Connectivity Research Team (http://medhycon.uib.cat), (2) Institute of Agro-Environmental and Water Economy Research -INAGEA, University of the Balearic Islands, (3) Institute of Earth and Environmental Science, University of Potsdam, Germany, (4) CNR-IRPI, National Research Council of Italy - Research Institute for Geo-Hydrological Protection, Padova, Italy, (5) Department of Geography, University of Valencia, Av. Blasco Ibáñez 28, 46010, Valencia, Spain
Autori CNR e affiliazioni
  • STEFANO CREMA
  • MARCO CAVALLI
Lingua/e
  • inglese
AbstractTraditional drainage systems combining man-made channels and subsurface tile drains have been used since Roman times to control water excess, favouring adequate soil water regime for agriculture purposes. However, mechanization of agriculture, abandonment or land use changes lead to a progressive deterioration of these drains in the last decades. The effects of these structures on hydrological and sediment dynamics have been previously analyzed in a small Mediterranean lowland catchment (Can Revull, Mallorca; Spain) by establishing an integrated sediment budget with a multi-technique approach. Moreover, the recent advances in morphometric techniques enable the completion of this analysis by the accurate identification of active areas (i.e. sources, pathway links, and sinks) and improve the understanding of (de-)coupling mechanisms of water and sediment linkages. In this study, an index of connectivity (IC) derived from a LiDAR-based high resolution DTM (< 1 pt m-2; RMSE < 0.2 m) was used to evaluate the spatial patterns of connectivity of the catchment. Design and configuration of the drainage system in Can Revull generated changes, favouring lateral decoupling between different compartments, with hillslopesfloodplain and floodplain-channels relationships showing a general decrease of IC values, and high longitudinal connectivity along the artificial channel network. Field observations after a low-magnitude high-frequency event (i.e. 23 mm in 5 h) corroborated that the drainage systems in Can Revull enabled rapid drainage of the water excess also promoting low surface runoff within the field crops, proving to be an effective management practice for erosion control in agricultural Mediterranean lowland catchments.. However, the occurrence of high-magnitude rainfall events may exceed the drainage capacity of the artificial channel network, giving rise to changes in the spatial patterns of connectivity, shifting the water pathways, triggering new sedimentary processes and considerably increasing the effective area of the catchment. The relationships between structural and functional connectivity according to the frequency-magnitude of the events is a challenge that will be addressed in this oral presentation.
Pagine da14985
Pagine a-
Pagine totali1
RivistaGeophysical research abstracts (Online)
Attiva dal 2000
Editore: Copernicus GmbH - Katlenburg-Lindau
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1607-7962
Titolo chiave: Geophysical research abstracts (Online)
Titolo proprio: Geophysical research abstracts. (Online)
Titolo abbreviato: Geophys. res. abstr. (Online)
Numero volume della rivista20
Serie/Collana-
Titolo del volume-
Numero volume della serie/collana-
Curatore/i del volume-
ISBN-
DOI-
Verificato da referee-
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)-
Parole chiavesediment connectivity, mediterranean, rainfall, agricultural drainage system
Link (URL, URI)https://meetingorganizer.copernicus.org/EGU2018/EGU2018-14985.pdf
Titolo convegno/congressoEGU - European Geosciences Union 2018
Luogo convegno/congressoVienna (Austria)
Data/e convegno/congresso8-13 aprile 2018
RilevanzaInternazionale
RelazioneContributo
Titolo parallelo-
Scadenza embargo-
Licenza-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • DTA.AD003.027.001 : Geomorfometria e dinamiche del sedimento nei bacini montani
Progetti Europei-
Allegati