Surface water Preliminary Assessment Extent (PAE) for the Maranoa Balonne Condamine (MBC) subregion - v03

## **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\nThe surface water PAE has been derived using maximum flood extent and stream flow data analysis for rivers in the MBC subregion.\n\nMost rivers in the subregion are ephemeral. Apart from a few wet months (the wet season in this region is October to April), river flow is zero or close to zero, except for the Dawson River. The volume of surface water generated and used in the mining and CSG developments throughout the year is much larger in comparison. Consequently, potential discharge from developments to these rivers could have a significant impact on the riparian environment. Since there will be little or no natural streamflow for most days of the year, the quality of released water also remains potentially unchanged along the rivers. \n\n\n\nIt is unclear how far any effluent water would travel in the natural water courses before being of no concern due to dilution, evaporation, seepage, chemical transformation or a combination of these. Factors that influence this include the quality and quantity of the release or spillage, existing flow in the receiving waters and the prevailing weather conditions. \n\n\n\nBuffers were applied to the Dawson, Moonie and Weir rivers. These vary between 5 and 7 km and are not symmetric along the channels. The widths were influenced by the extent of the riparian vegetation.\n\n## **Dataset History** \n\nThe PAE boundary was originally defined in Google Earth and saved to a KML format file, which was then imported into ArcGIS as a shapefile.\n\n\n\nBuffers were applied to the Dawson, Moonie and Weir rivers. These vary between 5 and 7 km and are not symmetric along the channels. The widths were influenced by the extent of the riparian vegetation.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2014) Surface water Preliminary Assessment Extent (PAE) for the Maranoa Balonne Condamine (MBC) subregion - v03. Bioregional Assessment Derived Dataset. Viewed 25 October 2017, http://data.bioregionalassessments.gov.au/dataset/26db7289-a34e-4160-9964-31ba49d56e68.\n\n## **Dataset Ancestors** \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** [NSW Catchment Management Authority Boundaries 20130917](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85)\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** [Bioregional Assessment areas v02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f)\n\n* **Derived From** [Geological Provinces - Full Extent](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad)\n\n* **Derived From** [Surface water preliminary assessment extent for the Maranoa-Balonne-Condamine subregion - v02](https://data.gov.au/data/dataset/eba4c66d-1b66-450b-8ab4-c930000ce316)\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。本元数据声明中的谱系（Lineage）字段已标注其源数据集来源，而生成该衍生数据集所历经的处理流程则详见元数据声明中的历史（History）字段。

本地表水初步评估范围（Surface water Preliminary Assessment Extent, PAE）系针对马兰诺阿-巴隆-康达明（Maranoa Balonne Condamine, MBC）次区域内的河流，通过最大洪水范围与河川径流数据分析衍生得到。

该次区域内多数河流为间歇河。除每年10月至次年4月的湿季数月外，除道森河（Dawson River）外，其余河流径流量均为零或接近零。全年矿业与煤层气（Coal Seam Gas, CSG）开发活动产生与消耗的地表水量远高于天然径流量。因此，开发活动向这些河流的潜在排污可能对河岸带环境造成显著影响。由于一年中多数时日天然径流量极少甚至为零，排入水体的水质沿河道几乎不会发生变化。

目前尚不明确任何排污废水在因稀释、蒸发、渗漏、化学转化或上述多种过程共同作用而达到无害水平前，会在天然河道中输送多远。影响该输送距离的因素包括排污或泄漏的水质与水量、受纳水体的现有径流量以及当地气象条件。

研究团队已对道森河、穆尼河（Moonie River）与韦尔河（Weir River）设置缓冲区，缓冲区宽度介于5至7公里之间，且沿河道并非对称分布，其宽度设定受河岸植被覆盖范围影响。

## **数据集历史**

初步评估范围（PAE）边界最初于谷歌地球（Google Earth）中划定，并保存为KML格式文件，随后被导入ArcGIS并转换为形状文件（shapefile）。

研究团队已对道森河、穆尼河与韦尔河设置缓冲区，缓冲区宽度介于5至7公里之间，且沿河道并非对称分布，其宽度设定受河岸植被覆盖范围影响。

## **数据集引用**

生物区域评估计划（2014） 马兰诺阿-巴隆-康达明次区域地表水初步评估范围（PAE）- 版本03。生物区域评估衍生数据集。查阅日期：2017年10月25日，网址：http://data.bioregionalassessments.gov.au/dataset/26db7289-a34e-4160-9964-31ba49d56e68.

## **数据集溯源**

* **衍生自** [2010年自然资源管理（Natural Resource Management, NRM）区域](https://data.gov.au/data/dataset/1d54e38f-4051-4f0c-a350-c7dbd8eba65b)

* **衍生自** [生物区域评估区域 版本03](https://data.gov.au/data/dataset/96dbf469-5463-4f4d-8fad-4214c97e5aac)

* **衍生自** [20130917年新南威尔士州流域管理局边界](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85)

* **衍生自** [生物区域评估区域 版本01](https://data.gov.au/data/dataset/0fd0d820-30b3-451f-a126-a50040426999)

* **衍生自** [GEODATA 25万比例尺地形系列3 文件地理数据库格式(.gdb)](https://data.gov.au/data/dataset/96ebf889-f726-4967-9964-714fb57d679b)

* **衍生自** [GEODATA 25万比例尺地形系列3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)

* **衍生自** [生物区域评估区域 版本02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f)

* **衍生自** [全域地质省](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad)

* **衍生自** [马兰诺阿-巴隆-康达明次区域地表水初步评估范围 - 版本02](https://data.gov.au/data/dataset/eba4c66d-1b66-450b-8ab4-c930000ce316)