CLM - Bore water level QLD

## **Abstract** \n\nThe dataset was derived by the Bioregional Assessment Programme from multiple source datasets. The source datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement. \n\n\n\nThis dataset contains the water level data for the Queensland part of the Clarence-Moreton Basin. The data were organized by geological formations. Water level data for the Queensland part of the Clarence-Moreton bioregion were obtained from the DNRM database. The 'water level' information in the database refers to the distance from the natural ground surface or reference point to the water surface in a groundwater bore. When the water level is above a reference point, it has a positive value, otherwise it is negative. No record is indicated by a zero. The 'Elevation' table records the elevation of natural ground surface around a bore or the reference point based on AHD or state datum (STD). When two elevation records for the same bore appeared, the most recent record was used. Thus, the water level represented as AHD is the sum of the water level in the 'Water level' table and the corresponding elevation in the 'Elevation' table. For the data to be deemed useful in the statistical analyses, they needed to be referenced relative to one datum. In this case, the Australian Height Datum (AHD) was used. Due to inconsistencies in data (being referenced to AHD, STD, and assumed datum (ASS)) and unknown quality and source of the elevations, the Australian one-second DEM was used for referencing all elevation data.\n\n## **Dataset History** \n\nThis dataset was compiled through the following process. \n\n\n\n1. Filter the data using the spatial extent of the Clarence-Moreton Basin;\n\n2. Data quality check;\n\n3. Replace the bore elevation data with the Australia 1s DEM data;\n\n4. Computer groundwater level using the measured water depth and the bore elevation;\n\n5. Aquifer assignment. Seven screen codes are used to indicate different bores in terms of their spatial relationship with a particular aquifer.\n\nI: bores with screen intervals inside the aquifer\n\nT: bores with a screen top inside the aquifer\n\nB: bores with a screen bottom within the aquifer\n\nE: bores with screen intervals penetrating the entire aquifer\n\nBOI: bores with their bottom inside the aquifer although without screen information in the database\n\nDS: aquifer assignment for a bore sourced directly from the state database where the bore is only open to a single aquifer\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2014) CLM - Bore water level QLD. Bioregional Assessment Derived Dataset. Viewed 28 September 2017, http://data.bioregionalassessments.gov.au/dataset/20c5f443-bd19-4d2b-9f96-6633244c64e5.\n\n## **Dataset Ancestors** \n\n* **Derived From** [Bioregional Assessment areas v02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f)\n\n* **Derived From** [Natural Resource Management (NRM) Regions 2010](https://data.gov.au/data/dataset/1d54e38f-4051-4f0c-a350-c7dbd8eba65b)\n\n* **Derived From** [Bioregional Assessment areas v03](https://data.gov.au/data/dataset/96dbf469-5463-4f4d-8fad-4214c97e5aac)\n\n* **Derived From** [QLD Department of Natural Resources and Mines Groundwater Database Extract 20142808](https://data.gov.au/data/dataset/a5c5cbdb-1152-43f7-9533-a123027b7ce1)\n\n* **Derived From** [Bioregional Assessment areas v01](https://data.gov.au/data/dataset/0fd0d820-30b3-451f-a126-a50040426999)\n\n* **Derived From** [GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)](https://data.gov.au/data/dataset/96ebf889-f726-4967-9964-714fb57d679b)\n\n* **Derived From** [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)\n\n* **Derived From** [NSW Catchment Management Authority Boundaries 20130917](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85)\n\n* **Derived From** [Geological Provinces - Full Extent](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad)\n\n* **Derived From** [Geoscience Australia, 1 second SRTM Digital Elevation Model (DEM)](https://data.gov.au/data/dataset/9a9284b6-eb45-4a13-97d0-91bf25f1187b)\n\n**摘要** 本数据集由生物区域评估计划（Bioregional Assessment Programme）从多源数据集衍生而来。源数据集的相关信息详见本元数据声明中的“谱系（Lineage）”字段，该衍生数据集的制作流程则记载于元数据声明的“历史（History）”字段。 本数据集包含克拉伦斯-莫顿盆地（Clarence-Moreton Basin）昆士兰州部分的水位数据，数据按地质地层进行组织。克拉伦斯-莫顿生物区域昆士兰州部分的水位数据源自昆士兰州自然资源与矿业部（DNRM）数据库。数据库中的“水位”指从自然地表或参考点至地下水钻孔水面的距离：当水位高于参考点时，数值为正；反之则为负，无记录时以0表示。 “高程”表记录了钻孔周边自然地表或参考点基于澳大利亚高程基准面（AHD）或州基准面（STD）的高程值。若同一钻孔存在多条高程记录，则采用最新的一条。因此，以澳大利亚高程基准面（AHD）为基准的水位值，等于“水位”表中的水位数值与“高程”表中对应高程数值之和。为确保数据可用于统计分析，需统一基准。本数据集采用澳大利亚高程基准面（AHD）作为统一基准。鉴于原始数据存在基准不一致的问题（部分数据采用AHD、STD或假定基准（ASS）），且原始高程数据的质量与来源不明，因此本数据集采用澳大利亚1秒分辨率数字高程模型（DEM）对所有高程数据进行基准统一。 **数据集历史** 本数据集通过以下流程编制完成： 1. 基于克拉伦斯-莫顿盆地的空间范围对数据进行筛选； 2. 开展数据质量检查； 3. 采用澳大利亚1秒分辨率数字高程模型（DEM）数据替换钻孔高程数据； 4. 根据实测水深与钻孔高程计算地下水位； 5. 含水层赋值。采用7种筛管编码来表征钻孔与特定含水层的空间关联关系： - I：筛管区间完全位于含水层内部的钻孔 - T：筛管顶部位于含水层内部的钻孔 - B：筛管底部位于含水层内部的钻孔 - E：筛管区间穿透整个含水层的钻孔 - BOI：数据库中无筛管信息且钻孔底部位于含水层内部的钻孔 - DS：直接源自州级数据库的钻孔含水层赋值，此类钻孔仅揭露单一含水层 **数据集引用** 生物区域评估计划（2014）CLM - 昆士兰州钻孔水位数据. 生物区域评估衍生数据集. 查阅日期：2017年9月28日，http://data.bioregionalassessments.gov.au/dataset/20c5f443-bd19-4d2b-9f96-6633244c64e5. **数据集溯源** * 源自 [生物区域评估区域 v02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f) * 源自 [自然资源管理（NRM）区域 2010](https://data.gov.au/data/dataset/1d54e38f-4051-4f0c-a350-c7dbd8eba65b) * 源自 [生物区域评估区域 v03](https://data.gov.au/data/dataset/96dbf469-5463-4f4d-8fad-4214c97e5aac) * 源自 [昆士兰州自然资源与矿业部20142808地下水数据库提取数据](https://data.gov.au/data/dataset/a5c5cbdb-1152-43f7-9533-a123027b7ce1) * 源自 [生物区域评估区域 v01](https://data.gov.au/data/dataset/0fd0d820-30b3-451f-a126-a50040426999) * 源自 [GEODATA TOPO 250K 系列3 文件地理数据库格式（.gdb）](https://data.gov.au/data/dataset/96ebf889-f726-4967-9964-714fb57d679b) * 源自 [GEODATA TOPO 250K 系列3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f) * 源自 [新南威尔士州流域管理局边界 20130917](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85) * 源自 [地质省全范围数据集](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad) * 源自 [澳大利亚地质科学局1秒分辨率SRTM数字高程模型（DEM）](https://data.gov.au/data/dataset/9a9284b6-eb45-4a13-97d0-91bf25f1187b)