Analysis on the change and driving factors of coastal wetland in Shantou city
In this study,according to the human-computer interactive interpretation and GIS analysis,the distribution of coastal wetlands in Shantou city was obtained since 1980s by analyzing the multi-temporal landsat remote sensing image data.According to wetland classification system,Shantou coastal wetland was divided into natural wetlands and constructed wetlands(first classification),inclu-ding 9 types.They were shallow sea areas,rivers,lakes,beaches/coastal,mangroves forest,reser-voirs/ponds,water fields,salterns and aquaculture ponds(secondary classification).The variation characteristics and the influencing factors of coastal wetlands in Shantou city were analyzed by dynamic degrees of single wetland type,wetland transition matrix and correlation analysis.The results showed that:from 1982 to 2020,the coastal wetlands in whole area were increased slightly by 19.08 km2.The natural wetlands shrank significantly with a total area loss of 51.18 km2,while the constructed wet-lands expanded significantly,with a total area increase of 70.26 km2.The main driving force of the change came from a series of human activities such as tideland reclamation,land reclamation,sea recla-mation and river aquaculture,construction of fishing port wharf and water conservancy facilities in the rapid urbanization process of Shantou city.Secondly,the changes of sediment discharge and sea level rise of the major rivers also played a certain role in the wetland change.
NETL
NSTL
万方数据
