Water environment carrying capacity of Dachen Island sea area,Taizhou
WANG Zuanyi
LI Yingdong
ZHENG Xinyun
CHENG Xiaopeng
HAUNG Hong
WANG Zhenhua
Abstract：Water quality at 20 sites in the sea area of Dachen Island,Taizhou City,was examined in Nov.,2019.The comprehensive pollution index of heavy metals was calculated with improved Nemer-ow index method,the water quality data were analyzed screened was with principla component analysis method,and the water environment carrying capacity was calculated and evaluated with BP neural net-work strategy.The results showed that all indexes meet the second grade of seawater quality standard except DIN and PO4-P;Pb content of individual sites is slightly higher than others,but the overall con-centration of heavy metals meet the second grade;the main driving factors of water environment quality are DIN,PO4-P,CODMn,DO,comprehensive pollution index of heavy metals and petroleum hydrocar-bons.The water environment carrying capacity revealed by BP neural network was spatially heteroge-neous,being lower in the northwest sea area and increasing to the southeast with the increase of the distance from the island.The water environment carrying capacity of the ecological protection zone was capable,and the water quality met the requirements of marine ranching construction.While the human activity area was slightly overloaded,the monitoring and management of water quality should be strengthened.
Keywords：Dachen Island sea areamarine ranchingprincipal component analysisBP neural net-workwater environment carrying capacity
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 116-123 )