Void evolution in soluble rocks: Development and validation of numerical models by field evidence

可溶岩石中的空洞演化：通过现场证据开发和验证数值模型

• 批准号: 5437925
• 负责人: Professor Dr. Steffen Birk
• 金额: --
• 依托单位: Institute of Geological Science
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5437925?language=en
• 关键词: Void; evolution; soluble; rocks; Development

The relation between hydrogeological environment and void evolution in soluble rocks will be examined by numerical modeling. Whereas earlier research focussed on generic conceptual settings, this project aims to establish site-related numerical models that are largely based on field data compiled from selected study sites. The study sites will be located in the karst terrain of the Western Ukraine, because this area is well documented, displays the full sequence of karst evolutionary stages, and hosts a wide variety of karst phenomena. Consequently, project results will be readily transferable to other karst areas. Using a Geographic Information System (GIS), field data will be compiled and analysed yielding site-related conceptual models of void evolution in various types of settings. These conceptual models will be tested by numerical modelling and iteratively improved by comparing model outcome and field observations. As a result, hydrogeological environments promoting the evolution of voids in suluble rocks will be identified. Based on a through literature review, the concepts derived from the study sites will be transferred and adapted to other karst regions. Thus, the fundamental knowledge required for the assessment of karst geohazards, such as land subsidence, collapses, and dam failure, will be provided.

通过数值模拟研究了水文地质环境与可溶性岩石孔隙演化的关系。虽然早期的研究集中在一般的概念设置，这个项目的目的是建立网站相关的数值模型，主要是基于从选定的研究网站汇编的现场数据。研究地点将位于乌克兰西部的喀斯特地形，因为该地区有很好的记录，显示了喀斯特演化阶段的完整序列，并拥有各种各样的喀斯特现象。因此，项目成果将很容易转移到其他岩溶地区。利用地理信息系统，将汇编和分析实地数据，得出与场地有关的各种类型环境中空洞演变的概念模型。这些概念模型将通过数值模拟进行测试，并通过比较模型结果和实地观测结果进行迭代改进。因此，水文地质环境，促进发展的空隙在可溶性岩石将被确定。通过文献回顾，从研究地点得出的概念将被转移和适应其他岩溶地区。从而为岩溶地质灾害（如地面沉降、崩塌和溃坝）的评价提供基础知识。