對數-雙曲線分布於粒徑分析及區分沉積環境之評估
Date Issued
2002
Date
2002
Author(s)
DOI
902116M002017
Abstract
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.
Subjects
grain size analysis
log-hyperbolic distribution
log-hyperbolic shape triangle
Tsaota
coastal dune
coastal dune
Publisher
臺北市：國立臺灣大學地理環境資源學系暨研究所
Type
report
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