相关实验视频
Updated: Jun 23, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.0K
[景观模式对非点源污染的空间尺度影响:中国东北部泰子河流域的案例研究]
Le-Ting Lyu1, Xiao-Yu Zheng1, Qi Liu2
1School of Geography, Liaoning Normal University, Dalian 116029, Liaoning, China.
概括
优化景观模式,特别是靠近河流的景观模式,是减少非点源污染的关键. 战略性土地利用和景观多样性管理改善了河流流域的水质.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 水文学的水文学
背景情况:
- 河流水质量是由自然因素和人类行为所塑造的.
- 景观模式影响各种空间尺度的污染物产生和运输.
研究的目的:
- 分析景观模式与泰子河流盆地河流非点源污染之间的关系.
- 确定影响水质的关键空间尺度和景观指数.
主要方法:
- 使用了相关性分析和冗余分析.
- 使用了水质监测数据和土地使用数据.
主要成果:
- 水质因季节而异,在洪水季节条件更好.
- 总 (TN) 和总 (TP) 度在下游和支流汇合处较高.
- 景观模式的影响在非洪水季节和TN上更为显著.
- 最佳的解释尺度是在500米的缓冲区 (洪水季节) 和下流域尺度 (非洪水季节) 内.
- 建筑土地,耕地和赤裸裸的土地增加了TN和TP,而森林减少了它们.
- 斑点密度,类似邻近的百分比和传染指数是关键的景观指标.
结论:
- 合理的景观分配,丰富多样性和优化的聚合/连接在流域和河岸区域可以改善水质.
- 这些战略支持河流流域的可持续生态管理.
相关概念视频
Typical Model Studies
354
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.
354
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
43
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
43

