受海砂开采等日益强烈的人类活动作用，全球浅海陆架的海床形态正被快速改造，海底地貌和动力环境将如何随之自适应演变，是当前国际海底地貌学研究的前沿方向之一。大规模海砂开采正强烈改造着台湾浅滩的巨型沙波地貌体系，重复观测资料清晰地揭示了采砂区沙波受损后的再生现象，为研究海底沙波发育演变提供了天然的实验场。本项目以采砂最甚的台湾浅滩西部为研究区，拟开展：1）基于多波束测深与近底微地貌仪观测的高分辨率地形地貌数据，评估采砂区范围与强度，建立采砂前后沙波区多参量数据库，阐释受损后再生沙波的演变规律；2）结合动力沉积实测资料，揭示再生沙波的动力沉积过程；3）构建多分辨率的嵌套式“动力-沉积-地貌”模型，模拟复杂动力驱动下再生沙波的发育特征及沉积输运过程的转变，探讨沙波再生过程的动力机制及主控因素。预期成果能丰富对全球陆架沙波发育与演化机制的认识，也可为我国浅海陆架海砂资源的合理开采利用提供科学依据。

Increasingly intense human activities such as sand mining, cause strong disturbances of the seabed in global shallow continental shelves. How the submarine bedforms and local environments will adapt to these is one of the frontier of studies on submarine geomorphology worldwide. Large-scale marine aggregate extraction is strongly acting on the giant sand wave morphology in the Taiwan Banks. Repeated observation data clearly reveals the regeneration of dredged sand waves in the sand mining area, providing a natural experimental field for studying the formation and evolution of submarine sand waves. Taking the western Taiwan Banks of the most intensive mining activities as the study area, this project will be carried out as follow: (1) based on the high-resolution bathymetric data obtained by both ship-based multi-beam echo sounding and bottom-mounted sand wave profiler, the area and intensity of sand mining in the study area are evaluated and the datasets of sand wave geometrical characteristics before and after mining are established, to interpret the changes in regenerated sand wave morphology after mining; (2) combined with measurement data of dynamic and sediment, the regeneration process of the dredged sand waves is revealed; (3) and a multi-resolution morphodynamic model of the study area is established before and after mining, to analyze the geometrical characteristics of regenerated sand waves and the transformation of sediment transport pattern driven by complex forces of tidal currents, waves and etc. On this basis, the mechanism and main controlling factors of sand wave regeneration process are investigated. The expected results of this project will enrich our understanding of the formation and evolution of shelf sand waves, as well as provide a scientific basis for the rational exploitation and utilization of sea sand resources on the continental shelf of China.