Drainage modelling for Australia's year-round Stations in Antarctica and at Macquarie Island

This GIS dataset is the result of modelling of surface water drainage for Australia's year-round stations in Antarctica (Casey, Davis, Mawson) and at Macquarie Island. This was done by the Australian Antarctic Data Centre in 2000 at the request of Dr Martin Riddle and Dr Ian Snape of the Australian Antarctic Division.The modelling was done using ESRI's ArcInfo workstation. A digital elevation model (DEM) was first created from the the Australian Antarctic Data Centre's topographic data, principally surface contours, and then drainage basins and drainage paths were derived from the DEM. The drainage is predicted surface flow due to changes in elevation and doesn't take account of any other processes. Several DEMs were created for each station at different spatial extents and resolutions.The origin of the topographic data was mapping from aerial photography. The aerial photography was flown on 4 January 1994 (Casey), 11, 12 February 1997 (Davis), 7 December 1994 (Macquarie Island) and 18 March 1996 (Mawson).The data available for download includes for each station: 1 the DEMs and the topographic data from which they were created; and2 the predicted drainage basins and drainage paths.The data was originally created in ESRI's coverage (vector) and grid (raster) formats. It is provided here in ESRI's file geodatabase format.Documentation is included with the data.The modelling was done as an aid to fuel spill contingency planning and the predicted drainage paths were used in the production of a spill risk assessment map for each station to go with the Australian Antarctic Division's fuel spill contingency plan for each station. The maps are available from the SCAR Map Catalogue (see a Related URL) and have catalogue numbers 13702 to 13705.Validation of the modelling for Casey is described in M.J.Riddle, I.Snape, D.T.Smith and A.Z.Woinarski, 'Development and validation of a GIS-based dispersion model for oil spills in snow covered ground' in Proceedings of the 3rd International Conference Contaminants in Freezing Ground, Hobart 14-18 April 2002 Figures 1 and 2 in this paper are available from the SCAR Map Catalogue and have catalogue numbers 12930 and 12931.

本地理信息系统（GIS）数据集是澳大利亚南极常年科考站（Casey、Davis、Mawson）及麦夸里岛地表水排水建模的结果。此项工作由澳大利亚南极数据中心于2000年应澳大利亚南极分部的Martin Riddle博士和Ian Snape博士的要求完成。

建模使用ESRI的ArcInfo工作站进行。首先基于澳大利亚南极数据中心的地形数据（主要为地表等高线）创建数字高程模型（DEM），随后从DEM中提取流域和排水路径。该排水为基于海拔变化预测的地表径流，未考虑其他过程。为每个站点创建了多个不同空间范围和分辨率的DEM。

可供下载的数据包含各站点的以下内容：1）DEM及其生成所用的地形数据；2）预测的流域和排水路径。数据最初以ESRI的coverage（矢量）和grid（栅格）格式创建，此处提供的是ESRI的文件地理数据库格式。数据附带相关文档。

建模旨在辅助燃油泄漏应急规划，预测的排水路径用于制作各站点的泄漏风险评估图，以配合澳大利亚南极分部针对各站点的燃油泄漏应急计划。这些地图可从SCAR地图目录获取（参见相关URL），目录编号为13702至13705。

Casey站点建模的验证详见M.J.Riddle、I.Snape、D.T.Smith及A.Z.Woinarski所著《基于GIS的冰雪覆盖区石油泄漏扩散模型的开发与验证》一文，该文发表于《第三届国际冻土污染物会议论文集》（霍巴特，2002年4月14-18日）。文中图1和图2可从SCAR地图目录获取，目录编号为12930和12931。