Gippsland Lakes Digital Elevation Model

The Gippsland Lakes are a large coastal lagoon system in Victoria with major settlements on their shores and a potential inundation area of over 700sq km. A digital elevation model (DEM) of the Gippsland Lakes was developed in 2002 to support flood level estimation. The ANUDEM program, produced by the Centre for Resource and Environmental Studies at the Australian National University was used to produce the DEM from a comprehensive range of data sources including digitised contours from aerial photogrammetry and survey data from local authorities . The Gippsland Lakes DEM provides a digital description of the terrain surface lying below 5 metres on the Australian Height Datum (AHD), including the bathymetry of the lakes, and gives continuous elevation values over the entire study domain. The DEM provides a useful tool for extracting cross-sections of model input, computing storage volumes for confined areas and displaying computed flood extents. The DEM has been developed for use in modeling high flow events and should not be used to assess inundations patterns under low flow conditions.

吉普斯兰湖（Gippsland Lakes）是维多利亚州一处大型沿海潟湖系统，沿岸分布有主要定居点，潜在淹没面积超过700平方千米。2002年，为支撑洪水水位估算工作，研究人员构建了吉普斯兰湖的数字高程模型（digital elevation model, DEM）。该模型采用澳大利亚国立大学（Australian National University）资源与环境研究中心开发的ANUDEM程序，基于多源综合数据集生成，数据来源涵盖航空摄影测量数字化等高线以及地方当局提供的测量数据。吉普斯兰湖数字高程模型可数字化描述澳大利亚高程基准面（Australian Height Datum, AHD）下5米以浅的地表形态，涵盖湖泊的水深地形，并可为整个研究区域提供连续的高程数值。该模型可用于提取模型输入断面、计算受限区域蓄水量以及可视化展示模拟洪水淹没范围，是一款实用的分析工具。本数字高程模型专为高流量事件模拟开发，不可用于评估低流量工况下的淹没格局。