粤港澳大湾区陆域土壤环境地球化学评价图

土壤环境质量综合评价图依据《土壤环境质量标准》（GB 15618-1995），计算表层土壤Cd、Hg、As、Cu、Pb、Cr、Zn、Ni等8种重金属元素质量分级综合指数Pi，然后应用MAPGIS软件TIN模型进行分析，以指数值的1、2、3勾绘等量线成图。海洋沉积物的环境地球化学评价主要为沉积物中Cu、Zn、Pb、Cr、As、Cd和Hg七种重金属污染程度评价，采用Hakanson（1980）评价方法计算出污染程度指数后，利用Surfer软件绘插值绘制成等值线图，然后导入ArcMap绘制污染程度分区图。

The comprehensive evaluation map of soil environmental quality is developed based on the Soil Environmental Quality Standard (GB 15618-1995). The comprehensive classification index Pi of 8 heavy metal elements including Cd, Hg, As, Cu, Pb, Cr, Zn and Ni in topsoil is first calculated, then analyzed using the TIN model of MAPGIS software, with contour lines plotted based on the index thresholds of 1, 2 and 3. The environmental geochemical evaluation of marine sediments mainly focuses on the pollution degree assessment of 7 heavy metals including Cu, Zn, Pb, Cr, As, Cd and Hg in sediments. After calculating the pollution degree index using the Hakanson (1980) evaluation method, interpolated contour maps are generated using Surfer software, which are then imported into ArcMap to produce pollution degree zoning maps.