Investigation on the Nourished Sand Movement in terms of Luminescence Measurements

Abstract

In this study, monitoring the nourished sand longshore movement was performed based on the feldspar luminescence measurements, including both Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). Nourished sand presents larger TL/OSL properties than the natural beach sand. Investigation on the spatiotemporal distribution of post-filling beach sand luminescence features provides the opportunity for assessment on the nourished sand movement characteristics, which was demonstrated from the present field studies along the Miyazaki coast and Shounan coast. Comparing these two techniques, it was found that the OSL technique is suitable for study on short-term sediment movement within a limited area; whereas, TL technique can be applied to the long-term and large-area nearshore process estimation.