AEOLIAN SAND TRANSPORT HIGH FREQUENCY LONG PERIOD CALIBRATION

摘要

Studies have been carried out, from April 1999 to April 2000, in Tróia (SW Portugal)rnin order to identify aeolian sand transport inhibitor factors during one year, aiming properrncalibration of known models. Photogrammetry, beach/dune system surveys and a high frequencyrnvertical sensor array were used to estimate aeolian sand transport. Calculated transport for allrndirections was 2.02 m3m-1year-1 with resultant of 1.58 m3m-1year-1 landwards – double ofrnmeasured value for 1958-99 time interval and up to three times measured survey values at sensorrnarray location, averaging 0.44 m3m-1year-1 for entire profile dune distance. Results show the needrnof local high frequency sensor calibration for better inhibitor factors understanding, improvingrnestimated/measured transport ratio. Expected self-recovery rates of the studied dune systemrn(1 m3 m-1) extend from 10 months to 3.3 years. However, sediment availability and single pointrnsensor readings are, still, non-controlled factors.