PAWC to 150cm DSM data of the Fitzroy catchment WA, Darwin catchments and Mitchell catchment Qld generated by the Northern Australia Water Resource Assessment

PAWC to 150cm is one of 18 attributes of soils chosen to underpin the land suitability assessment of the Northern Australia Water Resource Assessment (NAWRA) through the digital soil mapping process (DSM). PAWC (plant available water capacity) indicates the ability of a soil to retain and supply water for plant growth. This PAWC raster data represents a modelled dataset of PAWC to 150cm (mm of water to 150cm of soil depth) and is derived from analysed site data, spline calculations and environmental covariates. PAWC is a parameter used in land suitability assessments for rainfed cropping and for water use efficiency in irrigated land uses. This raster data provides improved soil information used to identify opportunities and promote detailed investigation for a range of sustainable regional development options and was created within the ‘Land Suitability’ activity of the CSIRO NAWRA. A companion dataset and statistics reflecting reliability of this data are also provided and can be found described in the lineage section of this metadata record. Processing information is supplied in ranger R scripts and attributes were modelled using a Random Forest approach.
The DSM process is described in the CSIRO NAWRA published report ‘Digital soil mapping of the Fitzroy, Darwin and Mitchell catchments. A technical report from the CSIRO Northern Australia Water Resource Assessment to the Government of Australia'. The land suitability assessment this dataset underpins is described in the CSIRO NAWRA published report ‘Land suitability of the Fitzroy, Darwin and Mitchell catchments. A technical report from the CSIRO Northern Australia Water Resource Assessment to the Government of Australia'.

150cm深度植物有效持水量（Plant Available Water Capacity，PAWC）是为支撑澳大利亚北部水资源评估（Northern Australia Water Resource Assessment，NAWRA）的土地适宜性评估而选取的18项土壤属性之一，相关评估通过数字土壤制图（Digital Soil Mapping，DSM）流程开展。PAWC指土壤留存并供给植物生长所需水分的能力。本PAWC栅格数据为150cm土壤深度对应的有效持水量数据集（单位：mm水/150cm土壤深度），由实地分析样本数据、样条插值计算与环境协变量建模生成。PAWC是雨养作物土地适宜性评估以及灌溉用地用水效率评估的关键参数。该栅格数据提供了更精准的土壤信息，可用于识别可持续区域发展机遇并推动相关细节调研，其由澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation，CSIRO）主导的NAWRA“土地适宜性”项目研制。本数据集配套的数据可靠性统计信息亦已提供，相关说明可参见本元数据记录的谱系（lineage）章节。数据处理流程通过基于ranger的R脚本实现，土壤属性则通过随机森林（Random Forest）方法建模。
数字土壤制图流程的详细说明可参见CSIRO发布的NAWRA技术报告《菲茨罗伊、达尔文与米切尔流域数字土壤制图——澳大利亚联邦科学与工业研究组织北部澳大利亚水资源评估项目向澳大利亚政府提交的技术报告》。本数据集支撑的土地适宜性评估内容，则见于CSIRO发布的NAWRA技术报告《菲茨罗伊、达尔文与米切尔流域土地适宜性——澳大利亚联邦科学与工业研究组织北部澳大利亚水资源评估项目向澳大利亚政府提交的技术报告》。