相关实验视频

Updated: Sep 14, 2025

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

Published on: September 26, 2017

综合出口级系数模型用于准确的非点源污染估计和管理在黄河流域的污染

Xueting Wang^1,2, Lei Wu^3,4,5, Yongkun Luo^1,2

¹Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Scientific reports

|July 20, 2025

概括

一个新的模型通过将环境因素与优化出口系数 (EC) 结合起来,改善了非点源污染 (NPSP) 估计. 这种增强的方法,即EC集成捕获模型 (EC-ICM),为流域管理和污染控制提供了更高的准确性.

科学领域:

环境科学环境科学
水文学的水文学
水质管理水质管理

背景情况:

出口系数模型 (ECM) 广泛用于非点源污染 (NPSP) 估计,但与复杂的流域扎.
准确量化大型,复杂的流域中的污染物负载需要比传统的ECM更先进的方法.

研究的目的:

开发和验证一个改进的模型,EC-Integrated Catchment Model (EC-ICM),用于更准确的NPSP负载评估.
整合环境因素和优化出口系数 (EC) 以提高流域管理的适应性.
确定高风险地区,并为污染控制提供有针对性的管理战略.

主要方法:

使用遗传算法 (GA) 和拉丁语超立方样本采样,获得经验EC值.
该EC-ICM结合了诸如下水流,地形,土壤侵蚀和污染物产生等因素.
污染因素是使用自然断裂进行分类的,风险评估采用积重量方法.

主要成果:

与GA优化的ECM相比,EC-ICM减少了总 (TN) 和总 (TP) 的相对误差分别为9.66%和6.68%.
土地利用 (耕地,草地) 是TN负载的主要来源,而畜牧业主导TP负载.
龙东洛斯高原被确定为NPSP的高风险地区.

结论:

在复杂的流域中,EC-ICM为NPSP估计提供了更准确和更具适应性的方法.
基于风险的区分管理策略对于确定高风险地区的有效污染控制至关重要.
未来的研究应该探索时间分辨率,气候变化影响和水力动力学模型集成.

关键词:

非点源污染的非点源污染.黄河盆地黄河盆地出口流系数模型中的出口流系数模型.总的总的总量总含量总含量

更多相关视频

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Modifying the Bank Erosion Hazard Index BEHI Protocol for Rapid Assessment of Streambank Erosion in Northeastern Ohio

Modifying the Bank Erosion Hazard Index BEHI Protocol for Rapid Assessment of Streambank Erosion in Northeastern Ohio

Published on: February 13, 2015

相关概念视频

Typical Model Studies

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.

Design Example: Design of an Irrigation Channel

Design Example: Design of an Irrigation Channel

Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...

Conservation of Mass in Moving, Nondeforming Control Volume

Conservation of Mass in Moving, Nondeforming Control Volume

Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...