Estimated Urban Soil Chemistry

The Estimated Urban Soil Chemistry data are derived by spatial interpolation of the Measured Urban Soil Chemistry data. A unique feature of this dataset is the inclusion for the first time of estimated bioaccessible arsenic and lead data. The Estimated Urban Soil Chemistry data indicates the estimated geometric mean concentrations (mg kg-1) of Arsenic, Cadmium, Chromium, Nickel and Lead in topsoil derived by spatial interpolation of the Measured Urban Soil Chemistry data. Estimated bioaccessible As and Pb concentrations are derived using linear regression models of the relationship between total and bioaccessible concentrations. The Estimated Urban Soil Chemistry data can be used to assist Local Planning Authorities to identify those areas where a risk assessment may need to be carried out by developers. Comparison of this spatially referenced geochemical data with information on current or historic land use and geological information might help environmental professionals decide whether high potentially harmful element (PHE) concentrations in topsoils can be attributed to geogenic or anthropogenic sources. The dataset is based on, and limited to, an interpretation of the records in the possession of the BGS at the time the dataset was created. This dataset consists of two shape files Estimated Urban Soil Chemistry (As, Cr, Ni) and Estimated Urban Soil Chemistry (Cd, Pb).

本数据集之都市土壤化学估算值，系通过测量都市土壤化学数据的空间插值所得。该数据集的一大特色在于首次纳入估算的生物可及砷和铅数据。都市土壤化学估算值揭示了通过测量都市土壤化学数据的空间插值得出的表层土壤中砷、镉、铬、镍和铅的估算几何平均浓度（mg/kg）。估算的生物可及砷（As）和铅（Pb）浓度则是基于总浓度与生物可及浓度之间关系的线性回归模型计算所得。都市土壤化学估算数据可协助地方规划当局识别可能需要开发商进行风险评估的区域。将此类具有空间参考的地球化学数据与当前或历史土地利用信息及地质信息进行对比，有助于环境专业人士判断表层土壤中高潜在有害元素（PHE）浓度是否归因于地质或人为来源。本数据集基于并限于在数据集创建时英国地质调查局（BGS）所拥有的记录进行解读。该数据集包含两个形状文件：估算都市土壤化学（As, Cr, Ni）和估算都市土壤化学（Cd, Pb）。