A Study on Environmental Impact of Fishing Engineering to Dongwuyang Internal Bay

ZHANG Wu; YANG Hong; PU Mingfeng

Abstract：HD and MT models in MIKE21 verification were used to studying the environmental impact of fishing engineering to Dongwuyang Internal Bay.The change of Dongwuyang tidal current field and sediment field in presence of Xiandong and Guanmen fishing port projects were calculated and analyzed,individually and simultaneously.The results showed that in the existence of Guanmen fishing port project,the area of the sediment erosion near Guanmen water course was the largest.In the existence of Guanmen and Xiandong fishing port projects,the growth of water flow velocity and area of the strong sediment erosion was smaller.However in the existence of Xiandong fishing port,the growth of water flow velocity and area of the strong sediment erosion were the smallest.The Guanmen fishing port made the hydrology in Guanmen waterways and area of north extender to be the biggest.This scenario resulted in turbid water and had the greatest impact on the growth of surrounding algae and zooplankton.It also reduced the yields of farmed laver and kelp and cultured animals.Besides,such scenarion caused a great influence on the distribution of spawning area of large yellow croaker.Taking togather,Xiandong fishing port construction was reasonable,but the location of Guanmen fishing port remained some problems.