• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Natural analogs for improved understanding of coupled processes in engineered earth systems: examples from karst system evolution
【24h】

Natural analogs for improved understanding of coupled processes in engineered earth systems: examples from karst system evolution

机译：天然类似物可增进对工程地球系统中耦合过程的理解：岩溶系统演化的例子

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There is an increasing need to understand the behaviour of engineered earth systems, from the viewpoint of safe waste disposal and exploration of renewable energy sources. Often, human activities lead to significant perturbations of the earth systems, involving hydrologic, mechanical, thermal and chemical processes. Prediction of the long-term response of earth systems to large perturbations is critical for evaluating their design, performance and operation. Because many of the processes involved in system response will manifest over decades or centuries, field-testing during the design stage is infeasible. In this connection, we propose that development of coupled process simulators and testing them on natural analogs provided by geologic systems may be fruitful. As example, we illustrate our attempts to simulate the development of two types of cave systems - branchwork in meteoric environments and mazework in hypogene or hydrothermal environments. Our computational models combine hydraulic, thermal and chemical processes in limestone fractures and consider the influence of subsurface heterogeneity as well. Our computational results vividly demonstrate the mechanisms by which branchwork patterns develop in meteoric environments and demonstrate how sustained dissolution along upward flow channels can be established in hypogene environments, thus creating favourable conditions for development of maze patterns. Investigations of system sensitivities in both types of environments indicate that a surprisingly robust pattern of behaviour results, thus serving as a target for developing simplified conceptual models of these systems. We also discuss the implications of our results for design, operation and risk analysis of engineered earth systems.
机译：从安全处置废物和探索可再生能源的角度出发，越来越需要了解人造地球系统的行为。通常，人类活动会导致地球系统发生重大扰动，涉及水文，机械，热和化学过程。预测地球系统对大扰动的长期响应对于评估其设计，性能和操作至关重要。由于涉及系统响应的许多过程将持续数十年或数百年，因此在设计阶段进行现场测试是不可行的。在这方面，我们建议开发耦合过程模拟器并在地质系统提供的天然类似物上进行测试可能是富有成果的。例如，我们说明了我们试图模拟两种类型的洞穴系统的尝试-流星环境中的分支工作和低本位或热液环境中的迷宫工作。我们的计算模型结合了石灰岩裂缝中的水力，热力和化学过程，并考虑了地下非均质性的影响。我们的计算结果生动地证明了在流星环境中分支模式发展的机制，并证明了如何在次生环境中建立沿向上流动通道的持续溶解，从而为迷宫模式的发展创造了有利条件。对两种类型的环境中的系统敏感性进行的研究表明，行为的模式出奇地健壮，从而成为开发这些系统的简化概念模型的目标。我们还将讨论我们的结果对工程地球系统的设计，运营和风险分析的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号