Systems Dynamics of Detention/Retention in Ponds

池塘滞留/滞留的系统动力学

• 批准号: 0003408
• 负责人: Pieter Visscher
• 金额: $ 26.46万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003408&HistoricalAwards=false
• 关键词: Systems; Dynamics; Detention; Retention; Ponds

0003408TorgersenSmall ponds are traditional for control of stormwater and chemical runoff. However, 'events' has been observed that result in significant internal loading, hyper-eutrophication and export of nutrients and contaminants from the ponds. We hypothesize that ordinary bacterial processes within the sediments/benthic-boundary-layer coupled with aperiodic shallow-pond-specific processes are responsible for this internal loading and downstream contamination. Thus, the coupled interactions of physics chemistry and biology in detention/retention ponds control the state of the pond more than any individual processes. This internal loading and coupled dynamics of ponds significantly alters the application of ponds in environmental engineering.We will test hypotheses for internal loading 'events' in ponds with continuous-recording instruments (WEB-addressable) and measure the dynamic responses of ponds to internal loading 'events' (rainfall, spring, accidents, etc.) We will observe and quantify significant bulk processes involved in the removal of nutrients and contaminants from retention ponds as well as the processes that regenerate/release nutrients and metals. With monitored pond response, coupled with direct sampling and wet chemical analyses, we will define a coupled dynamic pond model.We will develop a loading history model of ponds building upon CASC2D as a function of land use to predict when the critical lifetime of a pond has been reached and remediation is required. Development of the 1) pond-loading model and 2) pond dynamics model will contribute to the appropriate use and application of ponds as detention/retention devices in the environment. We will develop the web-addressable monitoring equipment with the possibility of creating an Instrumented Environmental Systems Laboratory for use in undergraduate teaching, honors theses and extensions to high school.. The pond loading and pond dynamics models developed from this study of two ponds can be tested with simplified studies in other ponds. Continuing projects will evaluate pond dynamics across a variety of climatic zones and land use types. The ultimate product will be a database and models that will significantly improve pond design and management.

0003408 Torgersen小池塘是控制雨水和化学径流的传统方法。 然而，“事件”已被观察到，导致显着的内部负载，富营养化和出口的营养物质和污染物从池塘。 我们假设，普通的细菌过程内的沉积物/底栖边界层加上非周期性的浅水池特定的过程是负责这种内部负载和下游污染。 因此，物理化学和生物学在滞留/滞留池的耦合相互作用控制的状态比任何单独的过程。 这种内部负载和耦合动力学的池塘显着改变池塘在环境工程中的应用。我们将测试假设的内部负载“事件”的池塘连续记录仪器（WEB可寻址）和测量池塘的动态响应内部负载“事件”（降雨，春天，事故等）。我们将观察和量化从保留池中去除营养物质和污染物以及再生/释放营养物质和金属的过程中所涉及的重要批量过程。 通过监测池塘响应，结合直接采样和湿化学分析，我们将定义一个耦合的动态池塘模型。我们将在CASC 2D上开发一个池塘负荷历史模型，作为土地利用的函数，以预测何时达到池塘的临界寿命并需要修复。 1）池塘负荷模型和2）池塘动力学模型的开发将有助于池塘作为环境中的滞留/保留装置的适当使用和应用。 我们将开发网络可寻址的监测设备，并有可能创建一个仪器化环境系统实验室，用于本科教学，荣誉论文和高中扩展。 池塘负荷和池塘动力学模型，从本研究的两个池塘，可以在其他池塘的简化研究进行测试。持续的项目将评估池塘动态在各种气候带和土地利用类型。 最终的产品将是一个数据库和模型，将显着改善池塘的设计和管理。