Primary and Secondary Coastal Sediment Compartment Maps

The National Classification of Coastal Sediment Compartments captures information on the spatial extent of all sediment compartments on the Australian coast. The classification implements a conceptual framework that supports regional and site-specific coastal management and can guide the selection of approaches to modelling shoreline response. The classification is based on the sediment systems and the geomorphologic processes that operate therein. This information is fundamental for predicting how the shoreline responds to the processes that act on it, both in the current and future climate. These include changes in waves and currents associated with sea-level rise and the placement of coastal infrastructure, e.g. sea walls and ports.\n\nThe classification is provided as two maps depicting primary and secondary sediment compartments, defined by polygons intersecting the coastline. The classification is hierarchical, such that secondary compartments fall within the extent of the primary compartments. Compartment extents, as identified by a panel of independent coastal science experts, were based on geology, geomorphology, topography and shoreline aspect. Primary compartment borders occur where these features were identified at scales between 1:250 000 and 1:100 000. Secondary compartment borders occur where these features were identified at scales less than 1:100 000\n\nThe seaward and landward boundaries of the compartments were defined by the offshore bathymetric depth and the onshore topographic elevation, respectively as follows:\n\t-130 m and +50 m elevation values for primary compartments, and \n\t-50 m and +25 m elevation values for secondary compartments.\n\nThis product is the result of a collaboration between Geoscience Australia and the Department of Industry, Innovation, Science, Climate Change, Technology and Tertiary Education. The spatial data shown in the maps, along with a detailed report and spatial data for the remaining broader scale compartments, will be available via web delivery in late 2013 through the Geoscience Australia website (www.ga.gov.au).\n\nYou can also purchase hard copies of Geoscience Australia data and other products at http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html

澳大利亚海岸沉积物单元国家分类体系（National Classification of Coastal Sediment Compartments）收录了澳大利亚沿岸所有沉积物单元的空间分布范围信息。该分类体系采用一套概念框架，可支撑区域及特定场地的海岸管理工作，并可为岸线响应模拟方法的选取提供指导。本分类体系以沉积物系统及其内部运作的地貌过程为构建基础。此类信息是预测当前及未来气候背景下岸线对其受作用过程响应方式的核心依据，这些过程包括与海平面上升相关的波浪、流场变化，以及海岸基础设施（如海堤、港口）的布设活动。

本分类体系以两幅地图形式呈现，分别对应一级与二级沉积物单元，二者以与岸线相交的多边形进行界定。该分类体系具有层级结构，二级沉积物单元的范围均包含于一级单元之内。沉积物单元的范围由独立海岸科学专家小组基于地质、地貌、地形及岸线朝向确定。一级单元的边界对应于比例尺1:250 000和1:100 000范围内识别出的上述特征；二级单元的边界则对应于比例尺小于1:100 000范围内识别出的上述特征。

沉积物单元的向海与向陆边界分别以离岸水深及陆域地形高程进行界定，具体标准如下：
- 一级单元对应-130米水深与+50米高程；
- 二级单元对应-50米水深与+25米高程。

本数据集由澳大利亚地质调查局（Geoscience Australia）与产业、创新、科学、气候变化、技术及高等教育部联合研制。地图中展示的空间数据，以及配套的详细报告与其余更大尺度沉积物单元的空间数据，将于2013年末通过澳大利亚地质调查局官方网站（www.ga.gov.au）以网络分发形式提供。

您也可通过http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html 页面订购澳大利亚地质调查局数据及其他产品的纸质副本。