Land use and cover change and sustainable development in the coastal zone of mainland China
The change of land use and land coverage is an essential research topic in global change studies.Coastal zones are hotspots in this research field.We obtained land use and land cover data(CLCD)in the coastal zone of mainland China from 1985 to 2021.Land use change rate,transfer matrix of land use,geo-spec-trum of land use change,indicators of United Nations'Sustainable Development Goals(SDGs)15.1.1,15.2 and 15.3.1 were used to analyze the characteristics of land use change and the progress in achieving the SDGs in the coastal zone of mainland China.1)From 1985 to 2021,the overall trend of land use and land cover change in the coastal zone of mainland China was mainly characterized by cropland shrinkage and impervious surface expansion,followed by forest land expansion,then shrub,grassland and barren land contraction,and small ex-pansion of water.2)The main types of land use were cropland and forest in the coastal zone of mainland China in the beginning of the study period,but in the later years,cropland,forest and impervious surface were the main types.3)The spatial separation degree of land use change was low in the study area,and the rate of change from cropland to impervious surface was the highest,and it was concentrated in the economic circles with high population density such as the Bohai Bay,the Yangtze River Delta and the Pearl River Delta.4)In terms of SDG indicators,the SDG indicator 15.1.1(forest coverage)increased by 0.88%(4 088.89 km2)in the coastal zone of mainland China.The SDG Indicator 15.1.1,forest area as a proportion of total land area,shows a promising sign of achieving SDG Target 15.1.1.Forests are effectively restored and controlled,showing a promising sign of achieving SDG Target 15.2.The land degradation rate rapidly increased in the early stage and stabilized in the later stage,with a land degradation rate of 11.76%in the study area over the past 36 years.Land degradation remains the main pattern of land change in the coastal zone of mainland China which sug-gests that in order to achieve a land degradation-neutral zone by 2030 as stated by SDG Target 15.3,more ef-forts are needed.Nonetheless,in the future,it is necessary to rationally plan the land use in the coastal zone of mainland China and dramatically improve land quality.
coastal zone of mainland Chinaland use changeUnited Nations Sustainable Development Goalsland use transfer matrixgeo-spectrum of land use change
万方数据
