Land units of the Victorian Wimmera

This dataset is the primary data output from the Wimmera land resource assessment project undertaken in 2004-06. It contains soil and land information at a scale of 1:100 000 for all freehold land in the Wimmera region of Victoria. The dataset was developed by the project "A Land Resource Assessment of the Wimmera Region" conducted by Robinson et al. (2006). This project was undertaken by DPI's PIRVic Division for the Wimmera Catchment Management Authority to provide consistent land resource information across the region. It utilised data from existing soil surveys at varying scales and intensity conducted over the previous 60 years, remote sensing information and additional field work to develop updated 1:100 000 scale soil/landform mapping across the region. The nominal scale of the dataset is appropriate for broadscale assessment of land capability and regional planning. At the map scale of this dataset soil-landform units are not homogeneous. For each defined soil-landform unit, soil types were identified and an assessment of their risk of degradation (compaction, erosion, sodicity and acidity) was made. Importantly it should be noted that soil attributes (for example texture, sodicity, pH) are expected to vary between acquired soil sites. As the variability of soil attributes within a map unit is difficult to predict, it is important to note that representative soils should be used as a guide only. The study report describing the project methodology and dataset attributes is available from the Victorian Resources Online website. DOI 10.4226/92/58e729e8aea3e本数据集为2004-2006年开展的威默拉（Wimmera）土地资源评估项目的核心数据产出成果，涵盖维多利亚州威默拉地区所有永久产权土地的1:10万比例尺土壤与土地相关信息。 本数据集由罗宾逊等人（Robinson et al., 2006）主持的"A Land Resource Assessment of the Wimmera Region"项目研发。该项目由维多利亚州初级产业部（DPI）下属的PIRVic部门承接，服务于威默拉流域管理局，旨在为该区域提供统一标准的土地资源信息。项目依托过去60年间开展的不同比例尺与精度的现有土壤调查数据、遥感信息及补充野外调查工作，完成了该区域1:10万比例尺的更新版土壤/地貌制图。 本数据集的标称比例尺适用于土地承载力的大范围评估与区域规划工作。 在本数据集的成图比例尺下，土壤-地貌单元并非均质单元。针对每一个划定的土壤-地貌单元，研究人员已识别其中的土壤类型，并评估了其发生退化（包括压实、侵蚀、碱化与酸化）的风险。 需特别说明的是，所采集的土壤点位间的土壤属性（例如质地、碱化度、pH值）存在差异。由于制图单元内土壤属性的变异性难以预测，因此需明确：所选取的代表性土壤仅可作为参考依据。 阐述本项目研究方法与数据集属性的研究报告可从维多利亚州资源在线（Victorian Resources Online）官网获取。 DOI：10.4226/92/58e729e8aea3e