As this study points out, that:
Long-term weather records show that northeasterly winds are dominant during winter, and can reach speeds as high as 10 – 17 m s-1 (Shih et al. 1994). This led to the build-up of up to 1.5 km long, 200 – 300 m wide dune ridges obliquely parallel to the coastline. Consequently, a relatively wide, sandy beach, accompanied by up to 10 – 20 m high coastal dunes stretches about 1.2 km south of the river-mouth. The shoreline characteristic changes again, as the beach transitions into a cliff coast