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Assessing the Impact of Climate Change on Intensity-Duration-Frequency (IDF) Curves in Manitoba.

机译:评估气候变化对曼尼托巴省的强度-持续时间-频率(IDF)曲线的影响。

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摘要

Global climate models predict changes in precipitation patterns in many areas of the world. Extreme precipitation in particular is poorly represented in climate models and there are significant difficulties involved in assessing the frequency and severity of future extreme precipitation events. In this study, several methods have been reviewed and compared for estimating projected changes in Intensity-Duration-Frequency (IDF) curves, commonly used in urban hydrology. A theoretical approach based on geostatistical considerations is employed to derive reasonable areal-reduction factors that make it possible to compare gridded model data with observations.;The mean value method and QQ-mapping have been used to remove biases from modeled data. A simple scaling model has been developed to construct IDF curves using the bias-corrected modeled data for the control and future climate. To investigate uncertainties in predicted changes, different simulations from the North American Regional Climate Change Assessment Program (NARCCAP) have been analyzed.
机译:全球气候模型预测了世界许多地区降水模式的变化。特别是极端降水在气候模型中的表现不佳,在评估未来极端降水事件的频率和严重性方面存在重大困难。在这项研究中,已对几种方法进行了回顾和比较,以估算城市水文学中常用的强度-持续时间-频率(IDF)曲线的预计变化。采用基于地统计学的理论方法来得出合理的面积缩减因子,从而可以将网格化模型数据与观测值进行比较。;均值方法和QQ映射已用于消除建模数据中的偏差。已经开发出一种简单的缩放模型,以使用用于控制和未来气候的偏差校正的建模数据来构造IDF曲线。为了调查预测变化的不确定性,已对北美地区气候变化评估计划(NARCCAP)的不同模拟进行了分析。

著录项

  • 作者

    Saha, Tultul.;

  • 作者单位

    University of Manitoba (Canada).;

  • 授予单位 University of Manitoba (Canada).;
  • 学科 Engineering Civil.;Climate Change.;Engineering Environmental.
  • 学位 M.Sc.
  • 年度 2013
  • 页码 153 p.
  • 总页数 153
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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