相关实验视频
Updated: Jul 13, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.1K
绘制全球非洪水平原湿地地图
Charles R Lane1, Ellen D'Amico2, Jay R Christensen3
1U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Athens, Georgia, USA.
概括
一个新的全球数据集的非洪平湿地 (NFWs) 显示,它们对于流域弹性至关重要. 这些NFW通常很小,位于河流泛滥平原之外,占全球大部分湿地,对保护和管理至关重要.
科学领域:
- 水文和湿地科学 水文和湿地科学
- 地理空间分析的研究.
- 环境管理环境管理
背景情况:
- 非洪水平原湿地 (NFWs) 对于流域弹性至关重要,提供必要的水文和生态化学功能.
- 全球NFW数据集的缺乏阻碍了有效的水资源管理和野生动物息地保护.
- 了解NFW分布对于应对流域规模的洪水,干旱和水质至关重要.
研究的目的:
- 开发和发布一个公开可用的全球非洪平原湿地数据集 (全球NFW数据集).
- 为将NFW纳入水资源管理和保护战略提供必要的空间数据.
- 为未来关于NFW功能和生态作用的研究奠定基础.
主要方法:
- 全球河流泛滥平原地图 (90米分辨率) 与全球整体湿地地图的整合.
- 开发洪水平原,湿地和非洪水平原湿地的空间数据层.
- 使用21个不同的盆地在美国境内的数据集的验证.
主要成果:
- 确定了近3300万个潜在的NFW,估计全球范围超过1600万平方公里.
- 全球已识别的湿地像素中,NFW占53%,表明它们是世界上大多数的湿地.
- 确定的NFW的中位数大小小小,从0.0180.138平方公里不等.
结论:
- 全球NFW数据集是推动湿地保护和管理的新型资源.
- 这一数据集有助于将NFW纳入水文,生物地球化学和生物模型.
- 这些发现凸显了NFW对全球湿地生态系统的重大,但经常被忽视的贡献.
相关概念视频
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
52
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...
52
Applications of GIS: Disaster Management and Emergency Response
90
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
90
Conservation of Mass in Moving, Nondeforming Control Volume
1.1K
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...
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...
1.1K
Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
Field Application of Global Positioning System
51
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
51
Plane Potential Flows
399
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
Uniform...
399

