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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...
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What is Climate?

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Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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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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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.
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Topographic Surveying and Contours01:29

Topographic Surveying and Contours

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Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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相关实验视频

Updated: Jan 10, 2026

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
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全球土地荒漠化风险评估全球土地荒漠化风险评估

Yu Ren1, Shengchun Xiao2, Xiaomei Peng2

  • 1Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Journal of environmental management
|November 27, 2025
PubMed
概括

超过43%的全球面临着高度的荒漠化风险,主要是由气候质量推动的. 了解这些全球荒漠化热点对于有效的土地管理和打击土地退化至关重要.

关键词:
驱动因素 驱动因素全球荒漠化导致的沙漠化.梅达卢斯-欧洲航天局风险 风险 风险 风险 风险

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Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
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相关实验视频

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Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
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科学领域:

  • 环境科学 环境科学
  • 生态生态学 生态生态学
  • 地理 地理 地理 地理.

背景情况:

  • 荒漠化是一个关键的全球环境挑战.
  • 了解荒漠化风险和驱动因素对于国际协议至关重要.
  • 目前全球荒漠化评估的范围有限.

研究的目的:

  • 评估2020年全球荒漠化风险.
  • 在全球范围内确定荒漠化的关键驱动因素.
  • 为打击荒漠化的战略提供信息.

主要方法:

  • 使用了加强的地中海荒漠化和土地利用-环境敏感区域 (MEDALUS-ESA) 模型.
  • 在四个关键方面整合多方面的评估指标.
  • 使用2020年数据评估全球荒漠化风险.

主要成果:

  • 全球43.09%的土地面积面临着荒漠化的高或极端风险.
  • 低风险和中等风险地区分别占35.52%和21.39%.
  • 高风险地区集中在地中海,非洲,东亚和南美洲.

结论:

  • 气候质量是全球荒漠化风险的主要驱动因素.
  • 植被和管理质量也对荒漠化作出了重大贡献.
  • 这些发现为全球和区域荒漠化管理提供了指导.