Spatial distribution, morphometry and activity of La Puebla de Alfindén sinkhole field in the Ebro river valley (NE Spain): applied aspects for hazard zonation |
| |
Authors: | F Gutiérrez-Santolalla M Gutiérrez-Elorza C Marín G Desir C Maldonado |
| |
Institution: | (1) Dpto. de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza, C/. Pedro Cerbuna, 12, 50009 Zaragoza, Spain |
| |
Abstract: | A highly active collapse sinkhole field in the evaporitic mantled karst of the Ebro river valley is studied (NE Spain). The subsidence is controlled by a NW-SE trending joint system and accelerated by the discharge of waste water from a nearby industrial state. The morphometry, spatial distribution and temporal evolution of the sinkholes have been analysed. The volume of the sinkholes yields a minimum estimate of average lowering of the surface by collapse subsidence of 46 cm. The clustering of the sinkholes and the tendency to form elongated uvalas and linear belts, in a NW–SE direction have a predictive utility and allow the establishment of criteria for a hazard zonation. With the precipitation record supplied by a pluviograph and periodic cartographic and photographic surveys the influence of heavy rainfall events on the triggering of collapses has been studied. |
| |
Keywords: | Evaporite karst Collapse sinkhole Spatial distribution Hazard zonation Spain |
本文献已被 SpringerLink 等数据库收录! |