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Intercomparison of Wave Hindcasts Using Two Kinds of Sea Wind Distribution Data in Tokyo Bay and Ise Bay

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Publication Date
Keywords
  • Wave Hindcasting
  • Two Kinds Of Wind Distribution Data
  • Tokyo Bay
  • Wave Height Error Statistics
  • Ise Bay
  • 500

Abstract

?????????????????????????????????????????????????????????????????????????????????????????? ?????????????????????????? ??????????????????????????????????????????????????? ?????????????????????????????????????????? ?????????????????????????????????????? ????????????????????????????????????? ???????????????????? ??? ????????????????????????????????????????????????????????? ?????? ???? 38 工学ジャーナル 第 12 巻 2013 年 3 月 Annual Journal of Eng., Ehime Univ., XII, Mar., 2013 2種類の海上風分布資料を用いた東京湾および伊勢湾における 波浪推算の精度比較 Intercomparison of Wave Hindcasts Using Two Kinds of Sea Wind Distribution Data in Tokyo Bay and Ise Bay 山口正隆*・大福 学**・畑田佳男***・野中浩一** Masataka YAMAGUCHI*, Manabu OHFUKU**, Yoshio HATADA***and Hirokazu NONAKA** Shallow water wave hindcasting in Tokyo Bay and Ise Bay was independently conducted using two kinds of wind distribution data for each of many storms in recent years. One hindcasting is estimated using the measurement data of sea and coastal winds and the other using the measurement data of on-land SDP winds. Accuracy of the hindcast wave heights is evaluated with the 4 error indices obtained from the comparison between hindcasts and measurements at several stations in each bay. Various statistics of the error indices give the following indications; 1)Measurement winds-based hindcasts show a 8-%(Tokyo Bay) or 5-%(Ise Bay) overestimation for wave height at individual times and good agreement on average with the measurement for the maximum wave height during a storm. 2)SDP winds-based hindcasts yield on average a 14-% overestimation for wave height at individual times and a 3-%(Tokyo Bay) or 8-%(Ise Bay) overestimation for the maximum wave height during a storm. 3)Accuracy of the measurement winds-based hindcasts is higher than that of the SDP winds-based hindcasts in Ise Bay but the contrary may hold true in Tokyo Bay. 4) Each of the hindcasts may be said to give reasonable evaluation for the maximum wave height during a s

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