首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Geospatial Analysis of Mass-Wasting Susceptibility of Four Small Catchments in Mountainous Area of Miyun County Beijing
【2h】

Geospatial Analysis of Mass-Wasting Susceptibility of Four Small Catchments in Mountainous Area of Miyun County Beijing

机译:北京市密云县山区四个小流域大规模消减磁化率的地理空间分析

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Driven by the pull of gravity, mass-wasting comprises all of the sedimentary processes related to remobilization of sediments deposited on slopes, including creep, sliding, slumping, flow, and fall. It is vital to conduct mass-wasting susceptibility mapping, with the aim of providing decision makers with management advice. The current study presents two individual data mining methods—the frequency ratio (FR) and information value model (IVM) methods—to map mass-wasting susceptibility in four catchments in Miyun County, Beijing, China. To achieve this goal, nine influence factors and a mass-wasting inventory map were used and produced, respectively. In this study, 71 mass-wasting locations were investigated in the field. Of these hazard locations, 70% of them were randomly selected to build the model, and the remaining 30% of the hazard locations were used for validation. Finally, a receiver operating characteristic (ROC) curve was used to assess the mass-wasting susceptibility maps produced by the above-mentioned models. Results show that the FR had a higher concordance and spatial differentiation, with respective values of 0.902 (area under the success rate) and 0.883 (area under the prediction rate), while the IVM had lower values of 0.865 (area under the success rate) and 0.855 (area under the prediction rate). Both proposed methodologies are useful for general planning and evaluation purposes, and they are shown to be reasonable models. Slopes of 6–21° were the most common thresholds that controlled occurrence of mass-wasting. Farmland terraces were mainly composed of gravel, mud, and clay, which are more prone to mass-wasting. Mass-wasting susceptibility mapping is feasible and potentially highly valuable. It could provide useful information in support of environmental health policies.
机译:在重力的推动下,消融包括与沉积在斜坡上的沉积物迁移有关的所有沉积过程,包括蠕变,滑动,下陷,流动和下降。进行大量浪费的敏感性映射至关重要,目的是为决策者提供管理建议。当前的研究提出了两种单独的数据挖掘方法-频率比(FR)和信息价值模型(IVM)方法-来绘制中国北京密云县四个集水区的消融敏感性。为了实现这一目标,分别使用和制作了九个影响因素和浪费大量的库存图。在这项研究中,在野外调查了71个浪费大量的地点。在这些危险场所中,随机选择了其中的70%来建立模型,其余的30%危险场所用于验证。最后,使用接收器工作特性(ROC)曲线来评估上述模型产生的质量消散敏感性图。结果表明,FR具有较高的一致性和空间差异性,分别为0.902(成功率以下区域)和0.883(预测率以下区域),而IVM较低,为0.865(成功率以下区域)。和0.855(低于预测率的区域)。两种建议的方法都可用于总体规划和评估目的,并且被证明是合理的模型。 6–21°的坡度是控制质量浪费发生的最常见阈值。农田梯田主要由砾石,泥土和黏土组成,它们更容易浪费。浪费大量磁化率图是可行的,并且可能具有很高的价值。它可以提供有用的信息来支持环境卫生政策。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号