Phreatic Standing Water Level Points at 10m Intervals - PED

## **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\nPoints at 10m intervals of the SWL depths to the phreatic groundwater zone.\n\n## **Purpose** \n\nTo represent SWL depths to the phreatic groundwater zone at 10m intervals.\n\n## **Dataset History** \n\nAll drillholes with recorded construction information, water cut and static water level (SWL) information within the study area were extracted from the South Australian Government Geological database SAGeodata.\n\nAs a first pass, the first water cut was compared to the SWL - if the SWL was lower than the first water cut, the SWL was accepted. If the SWL was more elevated than the first water cut, further analysis was undertaken.\n\nFurther analysis involved reviewing the construction details of the well. If either a) the top of the well screen was more elevated than the SWL, b) the well screen included the first water cut or c) the well was open, the SWL was accepted as phreatic. However, if a) the well was artesian b) the screen did not cover the first water cut interval or b) no construction information was available, the well was rejected.\n\nFinally, in order to both ensure adequate well coverage and to limit the amount of work undertaken, phreatic surfaces that included SWL that appeared slightly sub artesian were calculated and compared. In areas of adequate well coverage, minimal difference was not between wells where there was a 1, 5 and 10m sub-artesian difference between the first water cut and the SWL. Consequently, a margin of error of +10m was allowed for wells with SWL's more elevated than the recorded water cut.\n\n## **Dataset Citation** \n\nSA Department of Environment, Water and Natural Resources (2015) Phreatic Standing Water Level Points at 10m Intervals - PED. Bioregional Assessment Source Dataset. Viewed 12 October 2016, http://data.bioregionalassessments.gov.au/dataset/9305b01d-a3e6-4182-a1eb-d6933d697a2c.

## 摘要

本数据集及其元数据声明由第三方提交至生物区域评估计划（Bioregional Assessment Programme），此处按原始提交版本呈现。

该数据集为潜水含水层带静态水位（Static Water Level，SWL）深度以10米为间隔的测点数据。

## 数据集用途

用于以10米为间隔表征潜水含水层带的静态水位深度。

## 数据集历史

本研究区内所有记录有钻孔结构信息、出水段及静态水位（SWL）信息的钻孔，均从南澳大利亚州政府地质数据库SAGeodata中提取。

初步筛查阶段，将首次出水段与静态水位进行比对：若静态水位低于首次出水段，则保留该静态水位数据；若静态水位高于首次出水段，则需开展进一步分析。

进一步分析需核查钻孔的结构细节。若满足以下任一条件，则将该静态水位认定为潜水水位并予以保留：a）钻孔滤水管顶部高于静态水位；b）钻孔滤水管覆盖首次出水段；c）钻孔为开放式结构。反之，若满足以下任一条件，则剔除该钻孔数据：a）该井为自流井；b）滤水管未覆盖首次出水段区间；c）无钻孔结构信息。

最后，为确保钻孔覆盖充分且控制工作量，对包含疑似轻微亚自流静态水位的潜水面进行计算与比对。在钻孔覆盖充分的区域，首次出水段与静态水位间存在1米、5米及10米亚自流差值的钻孔之间，其计算得到的潜水面差异并不显著。因此，对于静态水位高于记录出水段的钻孔，允许设定+10米的误差容限。

## 数据集引用格式

南澳大利亚州环境、水与自然资源部（2015）《10米间隔潜水静态水位测点数据——PED》，生物区域评估源数据集。2016年10月12日查阅，http://data.bioregionalassessments.gov.au/dataset/9305b01d-a3e6-4182-a1eb-d6933d697a2c。