GABATLAS 24 hydraulic connectivity at GAB_base

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nThe regional scale hydraulic interconnection across the base of the Great Artesian Basin data categorises the hydraulic nature of the base the GAB, through properties of rocks in direct contact below and above the base of the GAB. It indicates areas of potential connectivity between aquifers in older basins and the aquifers in the GAB sequence. \n\n\n\nThere are two data layers described as;\n\n\n\nA: Hydrogeological basement units in contact with the base of the Great Artesian Basin - representing a regional interpretation of basement stratigraphic units as hydrostratigraphic units, in contact with the base of the Jurassic-Cretaceous sequence of the GAB\n\n\n\nB: Base Great Artesian Basin hydrogeological units directly overlying hydrogeological basement - representing a regional interpretation of the of the Jurassic-Cretaceous stratigraphic units at the base of the GAB, as hydrostratigraphic units.\n\n\n\nBoth represent coverages of hydraulic character, with qualitative categories from Aquiclude, through Tight Aquitard, Leaky Aquitard, to Partial Aquifer and Aquifer.\n\n\n\nThis dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 81685.\n\n## **Dataset History** \n\nSOURCE DATA: \n\nData was obtained from a variety of sources, as listed below:\n\n\n\n1.\tRansley TR and Smerdon BD (eds) (2012) Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia.\n\n2.\tStewart, A.J., Raymond, O.L., Totterdell, J.M., Zhang, W. & Gallagher, R., 2013. Australian Geological Provinces, 2013.01 edition. 2013.01 ed. Scale 1:2500000. Geoscience Australia, Canberra, Australia.\n\n3.\tUnpublished Arkaringa and Pedirka basin boundary data supplied by South Australian Department of Environment, Water and Natural Resources (Pers. Comm. Daniel Wohling 2014)\n\n\n\nMETHOD:\n\nData layer 'A' (Hydrogeological basement units in contact with the base of the Great Artesian Basin) is modified from Ransley & Smerdon (2012), Figure 5.8 (12-6563-45), using data from Stewart et.al (2013) and unpublished, revised Arkaringa and Pedirka basin boundaries, supplied by the South Australian Department of Environment, Water and Natural Resources. \n\n\n\nPolygons representing basement units in contact with base of the Great Artesian Basin. Compiled and used in conjunction with Polygons of Great Artesian Basin units directly overlying hydrogeological basement to represent the hydraulic interconnection between the Great Artesian Basin and basement units.\n\n\n\nData Layer 'B' (Base Great Artesian Basin hydrogeological units directly overlying hydrogeological basement) is a composite dataset derived from the following aquifer and aquitard extent layers in the data sources listed below.\n\n\n\n1.\tPaleogene-Neogene (Geocat No. 81675)\n\n2.\tWinton-Mackunda (Geocat No. 81676)\n\n3.\tRolling Downs (Geocat No. 81677)\n\n4.\tCadna-owie Hooray (Geocat No. 81678)\n\n5.\tWestbourne (Geocat No. 81679)\n\n6.\tAdori-Springbok (Geocat No. 81680)\n\n7.\tBirkhead-Walloon (Geocat No. 81681)\n\n8.\tHutton (Geocat No. 81682)\n\n9.\tEvergreen-Poolowanna (Geocat No. 81683)\n\n10.\tPrecipice (Geocat No. 81684)\n\n\n\nThe Aquifer and Aquitard extents were combined and the area of contact with the base of the GAB was derived for each formation extent layer;\n\n\n\nThis data set is the Aquifer/Aquitard layers at the bottom of the GAB - those in contact with the underlying basins. This data therefore provides information about the hydrological connectivity between the GAB and the basins beneath. The attribute table has been populated with aquifer properties which can be used to map the distribution. Some of the main Aquifers have been split based on the spatial change in aquifer properties.\n\n\n\nQAQC:\n\nData has undergone a QAQC verification process in order to capture and repair attribute and geometric errors. \n\n\n\nSOFTWARE:\n\nAll modifications/edits and geoprocessing were performed using ESRI ArcGIS 10 software.\n\n## **Dataset Citation** \n\nGeoscience Australia (2014) GABATLAS 24 hydraulic connectivity at GAB_base. Bioregional Assessment Source Dataset. Viewed 07 December 2018, http://data.bioregionalassessments.gov.au/dataset/580e6e5f-38a9-40b5-a41c-2949b5488e73.

**摘要**

本数据集及其元数据声明由第三方提供给生物区域评估计划（Bioregional Assessment Programme），本文档按原始提供的形式予以呈现。

本大自流盆地（Great Artesian Basin, GAB）基底区域尺度水力连通性数据集，通过分析GAB基底上下直接接触的岩石物性，对GAB基底的水文水力特性进行分类。该数据集可识别较老盆地含水层与GAB层序含水层之间的潜在连通区域。

本数据集包含两个数据图层，具体描述如下：

A层：与大自流盆地基底直接接触的水文地质基底单元（hydrogeological basement units）——该层将基底地层单元按区域解释为水文地层单元（hydrostratigraphic units），与GAB侏罗系-白垩系层序基底直接接触。

B层：直接覆于水文地质基底之上的大自流盆地基底水文地质单元——该层将GAB基底处的侏罗系-白垩系地层单元按区域解释为水文地层单元（hydrostratigraphic units）。

两层均涵盖水力特性分类，定性类别依次为隔水层（Aquiclude）、致密弱透水层（Tight Aquitard）、渗漏弱透水层（Leaky Aquitard）、半含水层（Partial Aquifer）及含水层（Aquifer）。

本数据集及相关元数据可通过编目号81685从www.ga.gov.au获取。

**数据集历史**

### 源数据
本数据集从以下多种来源获取：

1. Ransley TR与Smerdon BD 编（2012）《大自流盆地水文地层学、水文地质与系统概念模型》，澳大利亚政府委托技术报告，由澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）大自流盆地水资源评估项目编制，CSIRO健康国家水资源旗舰计划出品。

2. Stewart AJ、Raymond OL、Totterdell JM、Zhang W、Gallagher R（2013）《2013.01版澳大利亚地质省》，2013.01版，比例尺1:2500000，澳大利亚地球科学局（Geoscience Australia），澳大利亚堪培拉。

3. 由南澳大利亚环境、水与自然资源部提供的未公开阿卡林加盆地与佩迪尔卡盆地边界数据（2014年Daniel Wohling 个人通信）。

### 制作方法
A层（与大自流盆地基底直接接触的水文地质基底单元）改编自Ransley与Smerdon（2012）的图5.8（编号12-6563-45），数据来源包括Stewart等人（2013）的成果以及南澳大利亚环境、水与自然资源部提供的经修订的未公开阿卡林加盆地与佩迪尔卡盆地边界数据。

本层通过多边形要素表征与GAB基底接触的基底单元，并与直接覆于水文地质基底之上的GAB单元多边形要素结合使用，以表征GAB与基底单元之间的水力连通性。

B层（直接覆于水文地质基底之上的大自流盆地基底水文地质单元）为复合数据集，源自以下所列数据源中的含水层与弱透水层分布图层：

1. 古近系-新近系（编目号81675）
2. 温顿-马昆达组（编目号81676）
3. 罗林斯当斯组（编目号81677）
4. 卡德纳-奥伊-胡拉组（编目号81678）
5. 韦斯特本组（编目号81679）
6. 阿多里-斯普林博克组（编目号81680）
7. 伯克黑德-瓦隆组（编目号81681）
8. 赫顿组（编目号81682）
9. 埃弗格林-普洛瓦纳组（编目号81683）
10. 普雷西皮斯组（编目号81684）

将所有含水层与弱透水层的分布范围进行合并，并针对每个地层分布图层计算其与GAB基底的接触区域。

本数据集为GAB底部的含水层/弱透水层层组，即与下伏盆地直接接触的层组。因此，本数据集可提供GAB与下伏盆地之间的水文连通性相关信息。属性表已填充含水层物性数据，可用于绘制分布图谱。部分主要含水层已根据含水层物性的空间变化进行了拆分。

### 质量控制与质量保证（QAQC）
本数据集已通过QAQC验证流程，以识别并修复属性与几何错误。

### 软件工具
所有修改、编辑及地理处理工作均通过ESRI ArcGIS 10软件完成。

**数据集引用**

澳大利亚地球科学局（Geoscience Australia）（2014）《GABATLAS 24：GAB基底水力连通性》，生物区域评估源数据集。2018年12月7日查阅，http://data.bioregionalassessments.gov.au/dataset/580e6e5f-38a9-40b5-a41c-2949b5488e73。