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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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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...
30
Rapidly Varying Flow01:24

Rapidly Varying Flow

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Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
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Conservation of Mass in Moving, Nondeforming Control Volume01:14

Conservation of Mass in Moving, Nondeforming Control Volume

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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...
670
Hydraulic Jump: Problem Solving01:16

Hydraulic Jump: Problem Solving

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To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
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Applications of GIS: Disaster Management and Emergency Response01:29

Applications of GIS: Disaster Management and Emergency Response

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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...
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Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

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To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
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相关实验视频

Updated: May 13, 2025

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
07:58

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

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使用深度学习的盆地信息洪水频率分析显示了CONUS中一致的预测区域模式.

Rehenuma Lazin1, Giuliana Pallotta2, Céline Bonfils2

  • 1Lawrence Livermore National Laboratory Livermore, Livermore, CA, USA. lazin1@llnl.gov.

Scientific reports
|April 13, 2025
PubMed
概括
此摘要是机器生成的。

气候变化将使美国东部和西部沿海地区的洪水风险增加高达40%,而由于降低了积雪,西南地区的洪水趋势将会下降. 一个交互式地图可视化了这些未来的洪水变化.

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Watershed Planning within a Quantitative Scenario Analysis Framework
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相关实验视频

Last Updated: May 13, 2025

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
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科学领域:

  • 环境科学环境科学
  • 水文学的水文学
  • 气候科学是气候科学.

背景情况:

  • 气候变化通过改变降水和水循环动态,显著影响容易洪水的地区.
  • 了解未来的洪水趋势对于脆弱地区的有效适应计划至关重要.

研究的目的:

  • 分析气候变化对美国连续地区未来洪水趋势的影响 (CONUS).
  • 使用先进的建模技术,对10年和100年回归周期的洪水大小的变化进行预测.

主要方法:

  • 利用在gridMET气象数据上训练的长短期记忆 (LSTM) 模型,估计了638个地点的长期河流排放量.
  • 雇佣了缩小规模和偏差纠正的合模型对比项目5 (CMIP5) 气候预测作为模型输入.
  • 开发了一个交互式地图,以可视化历史和预测的洪水变化,用于适应规划.

主要成果:

  • 该LSTM模型准确地复制了观测到的河流排放模式.
  • 预计的洪水大小显示出不同的地理模式:东部和西部沿海地区的增长趋势 (+10%至+40%),西南地区的下降趋势 (-10%至-30%).
  • 增加的洪水趋势与极端降水量增加和峰值流动时间的改变有关,而下降的趋势与降低的积雪量有关.

结论:

  • 预计气候变化将在CONUS地区显著改变洪水动态,区域差异很大.
  • 适应战略必须考虑这些预测的变化,特别是沿海和西南部地区的对比趋势.
  • 开发的交互式地图是支持气候适应规划和洪水风险管理的宝贵工具.