Mechanics and Modelling of Agricultural Nonpoint Source Pollution

农业面源污染的机理和模型

• 批准号: RGPIN-2018-04733
• 负责人: Rudra, Ramesh
• 金额: $ 2.62万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753195
• 关键词: Mechanics; Modelling; Agricultural; Nonpoint; Source

The long-term research goals have been to develop practical approaches for environmentally sustainable nonpoint source pollution control, including watershed based source water protection and nutrient management. Development of such approach; needed for food security, environmental sustainability, soil resilience for sustainable food production and for future capacity building; will provide means to assess the effect of structural and non-structural best management and water management practises on the health of the water bodies in a watershed. Development of such approaches also require better understanding and description of hydrologic variable and processes affecting seasonal hydrology, their impact of stream flow pattern and adopted best management practices on nutrient loads. This research focuses on the quantification of the changes in the stream flow regimes due to climate change, development of an easily use-able screening approach for the application of non-point source pollution best management practises, and the development of an innovative approach to evaluate the performance of structural and non-structural best management practises adopted to control and improve stream water quality in Ontario's unique seasonal climatic conditions. This approach will lead to the development of tools for effective management of sediment and nutrient non-point source pollution due to agricultural land use activities. The proposed goal will be achieved by (i) quantification of the effect of climate change on hydrologic variables such as seasonal stream flow pattern, temperature and precipitation regimes, (ii) by development of an easily usable screening approach to identify the location of sediment and phosphorus sources for application of best management practises in a watershed, and (iii) by development of an event based watershed model having the capability to explicitly evaluate the impact of seasonal rainfall events and structural best management practices such as pipe inlets and blind inlets, and non-structural best management practices such as within watershed and along the stream vegetative filter strips adopted for non-point source pollution control. This research will provide a tool to evaluate the impact of road side ditches and variable field boundaries on sediment and nutrients delivered to the stream. This research will also provide a simple screening tool to identify the location for the application of best management practises in an agricultural watershed. Though the focus of this research has been the Ontario conditions, the results will be applicable to other regions of the country. The ultimate beneficiary will be society and humanity, who will be benefited from potential source water protection and water quality improvements.

长期研究目标是开发用于环境可持续的非点源污染控制的实用方法，包括基于分水岭的水源防水和营养管理。发展这种方法；粮食安全，环境可持续性，可持续粮食生产和未来能力建设所需的必需；将提供评估结构和非结构性最佳管理和水管理实践对流域水体健康的影响。这种方法的开发还需要更好地理解和描述水文变量和影响季节性水文的过程，流动流程模式的影响以及采用最佳管理实践对营养负荷。这项研究的重点是量化由于气候变化而导致的流流动方式的变化，开发易于使用的筛选方法，以应用非点源污染最佳管理实践以及开发一种创新方法来评估在安大略省独特的季节性气候条件下采用的结构和非结构性最佳管理实践的表现。这种方法将导致开发由于农业用途活动而导致的有效管理沉积物和营养非点污染的工具。 提出的目标将通过（i）量化气候变化对水文变量的影响，例如季节性流动流程，温度和降水状态，（ii）开发一种易于使用的筛选方法来识别沉积物的位置和磷源在流域中应用最佳管理实践，以及（iii）通过开发基于事件的分水岭模型，具有明确评估季节性降雨事件和结构最佳管理实践的影响，例如管道入口和盲人入口和盲人入口，以及非结构性的最佳管理实践，例如在流域内和沿溪流的植物过滤条，用于非点源污染控制。这项研究将提供一种工具，以评估道路侧沟和可变田间边界对溪流的沉积物和养分的影响。这项研究还将提供一个简单的筛选工具，以确定在农业流域中最佳管理实践的位置。尽管这项研究的重点是安大略省的条件，但结果将适用于该国其他地区。最终的受益人将是社会和人类，他们将从潜在的来源保护和水质改善中受益。