行政院國家科學委員會專題研究計畫成果報告:雨量站網設計中地形高程效應之影響(二)
Date Issued
1998
Date
1998
Author(s)
DOI
872313B002048
Abstract
Raingauge network in Tan-sui River
watershed is evaluated by theory of
geostatistics and random field simulation.
Dimensionless variogram of hourly rainfall
was established using hourly rainfall data
observed at thirty-two raingauge stations.
With reference to global kriging variances, a
sequential algorithm determines the
reasonable number of raingauges that should
be retained and basic raingauges that are
required to detect the trend of rainfall spatial
variation. Finally, a random field
simulation model (HYDRO_GEN) generates
realizations of an hourly rainfall random field
with predetermined probability distribution
and variogram. Using these simulated
realizations, we demonstrate that probability
distribution and variogram of the hourly
rainfall random field are successfully
recovered by the retained raingauges.
However, the basic raingauges fail to recover
the stochastic characteristics of hourly
rainfall field; instead, variogram of annual
rainfall field is recovered.
Subjects
kriging estimation
Random field simulation
raingauge network
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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