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Comparison and Applications of the Thornthwaite Moisture Index Using GIS

机译:使用GIS的荆棘抗湿度指数的比较与应用

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Comparison of four different TMI computational methods (Thornthwaite 1948; Thornthwaite and Mather 1955; Willmott and Feddema 1992; Witczak et al. 2006) are made using the National Oceanic and Atmospheric Administration's (NOAA) 30-year (1981-2010) climate normal for the U.S., are presented. Comparisons of the four TMI contour maps and evaluation of specific locations within Texas reveal discrepancies between each method. Contour maps of the continental U.S. are presented for the TMI-1955, TMI-1992, and TMI-2006, and analyzed along with the TMI-1948 contour from Thornthwaite (1948) using a geographic information system (GIS) platform. The GIS platform was developed as a tool for determining the TMI-1955, TMI-1992, and TMI-2006 at any desired location within the U.S. Comparison of various TMI computational methods indicates that the adoption of the TMI-2006 method most closely matches the original moisture balance approach of the TMI-1948 method, as was intended by its developers; however, caution should be taken when implementing TMI-based climate analysis in geotechnical applications given variability in methods and sensitivity to selected input data.
机译:四种不同TMI计算方法的比较(Thornthwaite 1948; Thornthwaite和Mather 1955; Willmott和Feddema 1992; Witczak等,2006)是使用国家海洋和大气管理局(NOAA)30年(1981-2010)气候正常的展示了美国。四个TMI轮廓图的比较和德克萨斯州特定位置的评估揭示了每种方法之间的差异。美国大陆美国的轮廓图是为TMI-1955,TMI-1992和TMI-2006提供的,并使用地理信息系统(GIS)平台与TMI-1948的轮廓一起分析。 GIS平台被开发为用于确定TMI-1955,TMI-1992和TMI-2006在美国各种TMI计算方法的比较内的任何所需位置的工具,表明TMI-2006方法的采用最接近匹配TMI-1948方法的原始水分平衡方法,由其开发商的意图;但是,在岩土应用中实施基于TMI的气候分析时,应注意在岩土应用中的致易变性和对所选输入数据的灵敏度的变化时进行。

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