TY  - JOUR
PY  - 2016//
TI  - The impact of droughts and climate change on sinkhole occurrence. a case study from the evaporite karst of the Fluvia Valley, NE Spain
JO  - Science of the total environment
A1  - Linares, Rogelio
A1  - Roqué, Carles
A1  - Gutiérrez, Francisco
A1  - Zarroca, Mario
A1  - Carbonel, Domingo
A1  - Bach, Joan
A1  - Fabregat, Ivan
SP  - 345
EP  - 358
VL  - 579
IS  - 
N2  - This work introduces the concept that sinkhole frequency in some karst settings increases during drought periods. This conception is tested in a sector of the Fluvia River valley in NE Spain, where subsidence phenomena is related to the karstification of folded Eocene evaporite formations. In the discharge areas, the evaporites behave as confined aquifers affected by hypogene karstification caused by aggressive artesian flows coming form an underlying carbonate aquifer. A sinkhole inventory with chronological data has been constructed, revealing temporal clusters. Those clusters show a good correlation with drought periods, as revealed by precipitation, river discharge and piezometric data. This temporal association is particularly obvious for the last and current drought starting in 1998, which is the most intense of the record period (1940-present). Climatic projections based on recent studies foresee an intensification of the droughts in this sector of NE Spain, which could be accompanied by the enhancement of the sinkhole hazard and the associated risks.<br><br>Copyright © 2016 Elsevier B.V. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 0048-9697
UR  - http://dx.doi.org/10.1016/j.scitotenv.2016.11.091
ID  - ref1
ER  -