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|Title:||FLUVIAL CHANGE AND THE DEVELOPMENT OF THE PING RIVER, THAILAND: SEDIMENTOLOGICAL AND CHRONOLOGICAL EVIDENCE||Authors:||ELISHA ANNE TEO PEI YI||Keywords:||fluvial geomorphology, avulsion, disaster management, thailand, morphodynamics, palaeochannel||Issue Date:||24-Aug-2018||Citation:||ELISHA ANNE TEO PEI YI (2018-08-24). FLUVIAL CHANGE AND THE DEVELOPMENT OF THE PING RIVER, THAILAND: SEDIMENTOLOGICAL AND CHRONOLOGICAL EVIDENCE. ScholarBank@NUS Repository.||Abstract:||The incomplete fluvial history of the Ping River, Thailand led to underestimation of avulsions as a disaster risk. This study provides sedimentological evidence of formerly avulsed palaeochannels and proves that avulsions are a characteristic phenomenon of the Ping. The sedimentology (using electrical resistivity tomography, augering and luminescence dating methods) indicates that the Ping evolved from a braided to an avulsing system due to the cooling/drying in the mid-Holocene. Despite recent warming/wetting, increased bank resistance has prevented the Ping from returning to its braided system style. Instead, avulsions have become the dominant form of fluvial adjustment during the recent warm/wet climate. At least three avulsions (up to five events) have occurred within the past millennium, possibly triggered by floods, human interferences, or earthquakes. Future avulsions are possible. Setup and triggering factors still exist and are exacerbated by human impact. It is recommended that geomorphic processes be incorporated into flood risk assessment.||URI:||http://scholarbank.nus.edu.sg/handle/10635/151260|
|Appears in Collections:||Ph.D Theses (Open)|
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