武汉长江新城地区土地质量地球化学评价

Land Quality Geochemical Assessment of the Yangtze River Demonstration District in Wuhan

为武汉长江新城污染防治和土地的规划利用取得基础数据,以长江新城为研究区,按16个点/km^(2)的密度采集表层土壤样品,系统分析了该区土壤样品中营养元素、重金属元素的含量。采用土地利用现状图斑作为评价单元,参照《土地质量地球化学评价规范》(DZ/T 0295—2016)对研究区进行地球化学评价。结果表明:长江新城土壤养分总体表现为较缺乏,土壤环境总体表现为较清洁,土壤质量地球化学综合等级以二、三等地为主;土壤中Se元素总体为适量,耕地中Se元素含量总体为缺乏—适量;灌溉水环境地球化学等级少量为二等(不合格)。总体评价情况来看,调查区土地质量以Ⅱ—Ⅲ级地为主,与土壤质量地球化学综合等级结果基本一致。

To acquire fundamental data of pollution control and land plan, utilization in the Yangtze River Demonstration District, Wuhan, taking the district as the study area, according to 16 points/km^(2) density gathering topsoil samples, systematically analyzed nutritive element, heavy metal element contents in soil samples from the district. Using soil utilization status quo map pattern spot as assessment unit, refer to the “Specification of Land Quality Geochemical Assessment DZ/T 0295-2016” carried out study area geochemical assessment. The result has shown that the soil nutrient is showing relatively deficient, soil environment belongs to rather clean type, soil quality geochemical comprehensive grade is mainly categories Ⅱ and Ⅲ. Se element content in soil is in moderation, while in farm land deficient-moderation as a whole. A few irrigations water environmental geochemical grade belongs to grade Ⅱ(unqualified). From integrated assessment point of view, study area land quality mainly belongs to land grade Ⅱ-Ⅲ, basically consistent with soil quality geochemical comprehensive grade.