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相关概念视频

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

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

53
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...
53
Manipulation and Analysis01:21

Manipulation and Analysis

29
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
29
Levels of Use of a GIS01:29

Levels of Use of a GIS

57
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
57
Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

110
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...
110
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

208
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
208
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...
91

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相关实验视频

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Watershed Planning within a Quantitative Scenario Analysis Framework
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一个经过修改的DRASTIC模型,用于使用连接路径和分析层次过程方法进行地下水脆弱性评估.

Ali Miron Baki1, Seyed Morsal Ghavami2

  • 1Department of Surveying Engineering, University of Zanjan, Zanjan, Iran.

Environmental science and pollution research international
|October 9, 2023
PubMed
概括

这项研究通过将分析层次流程 (AHP) 与连接路径方法 (CPM) 集成来增强地下水脆弱性评估,以改进DRASTIC模型. 修改后的方法为更好的水资源管理提供了更准确的污染风险评估.

关键词:
在 AHP AHP 中.在CPM中使用CPM.这是极端的,极端的.地理信息系统 (GIS) 是一个评估地下水脆弱性的评估这是PCM的PCM.

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相关实验视频

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科学领域:

  • 环境科学 环境科学
  • 水文地质学 水文地质学
  • 水资源管理 水资源管理

背景情况:

  • 地下水对于家庭,农业和工业需求至关重要,需要有效的污染脆弱性评估.
  • 标准DRASTIC模型是基于GIS的工具,使用了7个参数,但由于在不同水气候区域中固定参数重量存在局限性.
  • 调整DRASTIC参数权重对于在各种环境设置中准确地绘制脆弱性至关重要.

研究的目的:

  • 通过整合分析层次过程 (AHP) 和连接路径方法 (CPM) 来修改DRASTIC模型,以改进地下水脆弱性评估.
  • 为了解决预定义的DRASTIC参数权重的局限性,并提高其在不同水气候条件下的适用性.
  • 开发一种更精确,更一致的方法来评估地下水污染的脆弱性.

主要方法:

  • 该研究整合了分析层次过程 (AHP) 以获得专家判断,以及连接路径方法 (CPM) 以完成对对比矩阵 (PCM).
  • 通过结合AHP和CPM来开发一个修改后的DRASTIC模型,以根据专家输入调整参数权重并确保一致性.
  • 拟议的方法应用于伊朗Khoy县,并与标准DRASTIC和农药DRASTIC模型进行比较.

主要成果:

  • 经过修改的DRASTIC模型,整合了AHP和CPM,与标准DRASTIC (0.47) 和农药DRASTIC (0.27) 相比,与酸盐度的相关性更高 (0.57).
  • 连接路径方法有效地估计了不完整的对对比矩阵中的缺失判断,确保了几何一致性.
  • 在Khoy县的应用证实了AHP-CPM综合方法对地下水脆弱性评估的增强精度.

结论:

  • AHP和CPM的整合为完善DRASTIC模型提供了一个强大的框架,从而更准确地进行地下水脆弱性评估.
  • 拟议的方法克服了标准DRASTIC模型中固定参数权重的局限性,为区域水文地质条件提供了更大的适应性.
  • 这种增强的方法对于制定针对地下水资源的有针对性的保护和预防管理策略是有价值的.