https://scholars.lib.ntu.edu.tw/handle/123456789/40809
標題: | 對數-雙曲線分布於粒徑分析及區分沉積環境之評估 | 作者: | 李建堂 | 關鍵字: | 粒徑分析;對數-雙曲線分布;對數-雙曲線形狀三角形;草漯 海岸沙丘;grain size analysis;log-hyperbolic distribution;log-hyperbolic shape triangle;Tsaota coastal dune | 公開日期: | 2002 | 出版社: | 臺北市:國立臺灣大學地理環境資源學系暨研究所 | 摘要: | 本研究經由長方形網格採樣設計,自 草漯海岸沙丘中的沙灘/沙丘系統採取 120 個沉積物樣本用來評估:(1)對數-雙曲 線分布於粒徑分析的適用性;以及(2)利用 對數-雙曲線分布中的敏感參數來區分沙 灘/沙丘系統中不同沉積環境的可行性。 研究顯示有98 個樣本(81.7%)的粒徑 分布合於對數-雙曲線分布,同時其偏態和 峰度參數(Chi 和Xi)散點圖均位於對數-雙 曲線形狀三角形內。此結果顯示,對數- 雙曲線分布模式適用於本研究沉積物的 粒徑分布。另外,由對數-雙曲線模式導出 的主要參數,經簡單變異數分析顯示,有 5 個敏感參數在沙灘和沙丘中有顯著的差 異(=0.05),而用此5 個參數區別沙灘和 沙丘沉積環境的準確性達78.6%,因而利 用對數-雙曲線分布的敏感參數來區分不 同沉積環境是可行的。 Total 120 surface sediment samples were collected from the beach/dune system in Tsaota coastal dune area by means of rectangular grid sampling design to assess: (1) the suitability of log-hyperbolic distribution for grain size analysis; and (2) the applicability of sensitive parameters derived from the log-hyperbolic distribution model to discriminate sediments between beach and dune sub-environments. Results indicated that 98 of 120 samples (81.7%) could fit the log-hyperbolic distribution and scatter plots of Chi and Xi located within the log-hyperbolic shape triangle. This suggested that the log-hyperbolic distribution is the appropriate model for sediment grain size distribution in this study. Five sensitive parameters of log-hyperbolic distribution were determined by means of simple variance analysis. Those parameters are significantly different between beach and dune sub-environments (=0.05). Meanwhile, the discriminant analysis indicated that the accuracy of discrimination between beach and dune sediments via these 5 sensitive parameters is 78.6%. Thus, it is applicable of using sensitive parameters derived from the log-hyperbolic distribution to discriminate beach/dune system sub-environments. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/11405 | 其他識別: | 902116M002017 | Rights: | 國立臺灣大學地理環境資源學系暨研究所 |
顯示於: | 地理環境資源學系 |
檔案 | 描述 | 大小 | 格式 | |
---|---|---|---|---|
902116M002017.pdf | 199.44 kB | Adobe PDF | 檢視/開啟 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。