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.\n\nThe 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.\n\nThe nominal scale of the dataset is appropriate for broadscale assessment of land capability and regional planning.\n\nAt 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.\n\nImportantly 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.\n\nThe study report describing the project methodology and dataset attributes is available from the Victorian Resources Online website.\n\nDOI 10.4226/92/58e729e8aea3e

本数据集为2004至2006年间开展的威默拉（Wimmera）土地资源评估项目的核心数据产出成果。其包含维多利亚州威默拉地区所有永久保有土地的1:10万比例尺土壤与土地相关信息。

本数据集由Robinson等人（2006年）开展的《威默拉地区土地资源评估》项目研发。该项目由DPI下属PIRVic部门为威默拉流域管理局实施，旨在为全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、遥感信息及额外野外作业数据，完成了全区域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，并评估了其退化风险（包括板结、侵蚀、钠质化与酸化）。

需特别说明的是，所获取的土壤采样点位间的土壤属性（例如质地、钠质化程度、pH值）存在差异。由于图斑内部土壤属性的变异性难以预测，因此仅可将代表性土壤作为参考依据。

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）网站获取。

DOI 10.4226/92/58e729e8aea3e