coast shelf
1.The sand waves in East Gulf Beibu off Dongfang Coast were high-accurately investigated by using SIMRAD-EM3000 multibeam sounding system and DGPS Position System, and all of the investigation date were analyzed deeply. The results indicate that: 1) The bedform from coast to continental shelf obviously has the character of zonation, there appears the poorerosion zone, the sand wave and ridge zone and the flat zone.
2.In summer the upwelling in the continental shelf margin waters of the east coast of Guangdong is located in a belt-type zone which runs from southwest to northeast, in the continental shelf margin of the north Dongsha Islands, with the most intensive upwelling occuring in the southwest shallows of Taiwan.
