Recharge pathway domains - Beetaloo GBA region

\n## **Abstract** \nInterpretation of data on maps 522 and 528 and AusAEM maps. Within the Beetaloo GBA region, areas with higher potential for recharge to the Cambrian Limestone aquifer are those with the following conditions: A. Carpentaria Basin cover is thin, B. Carpentaria B sequence consists primarily of Carpentaria A sandstone, and C. there are areas with sinkholes at surface and other collapse features. These conditions are met in NW corner of Beetaloo GBA region. Areas with potential for recharge to Carpentaria Basin A sandstone aquifer, may occur where the Carpentaria Basin sandstone is partially saturated. Indirectly this may be a source of recharge to the underlying CLA as well. This area occurs in southern parts of the Beetaloo GBA region, where the Caprentaria sandstone is utilised as an aquifer.The rest of the eastern Beetaloo probably has lower potential for recharge as Carpentaria Basin sediments tend to be dominated by clay and black shale, and can be very thick. These areas need to be double checked against longterm water level data to confirm if any recharge is occurring.\n\n\n## **Attribution** \nGeological and Bioregional Assessment Program\n\n\n## **History** \nProduced by interpreting Caprentaria thickness and sinkhole maps (see factsheet 5 available from https://www.bioregionalassessments.gov.au/gba for more details). Polygons were generated in ArcGIS from visual interpretation and stored in shapefile format.

## **摘要**
本数据集基于522号、528号地图与AusAEM地图（AusAEM）的数据解译成果。在比塔罗洛地质生物区域评估区（Beetaloo GBA）内，寒武纪灰岩含水层（Cambrian Limestone aquifer，以下简称CLA）的补给潜力较高的区域需满足以下条件：A. 卡奔塔利亚盆地（Carpentaria Basin）覆盖层较薄；B. 卡奔塔利亚B地层主要由卡奔塔利亚A组砂岩构成；C. 地表存在落水洞及其他塌陷构造。上述条件在比塔罗洛GBA区域的西北角均得到满足。
卡奔塔利亚盆地A组砂岩含水层的补给潜力区可能出现在卡奔塔利亚盆地砂岩处于部分饱和状态的区域。间接而言，这也可能成为下伏CLA的补给来源之一。该类区域分布于比塔罗洛GBA区域的南部，此处卡奔塔利亚砂岩被用作含水层。
比塔罗洛区域东部的其余部分补给潜力可能较低，因卡奔塔利亚盆地沉积物多以黏土与黑色页岩为主，且厚度往往较大。需结合长期水位监测数据对上述区域开展复核，以确认是否存在补给过程。

## **归属说明**
地质与生物区域评估项目

## **编制历史**
本数据集通过解译卡奔塔利亚厚度图与落水洞图编制而成（详细信息可参阅https://www.bioregionalassessments.gov.au/gba 公开的情况说明书5）。多边形要素通过ArcGIS软件目视解译生成，并以shapefile格式存储。