学会誌「自然災害科学」

自然災害科学36 Vol.14,No.3, 1995, p235f

【論文】[Regular Paper]

波浪追算に基づく霞ヶ浦での波候の推定

Estimation of Wave Climate in Lake Kasumigaura Based on Wave Hindcasting

山口 正隆*・畑田 佳男*・田窪 宏朗**

Masataka YAMAGUCHI*, Yoshio HATADA* and Hiroaki TAKUBO**

Abstract

This paper presents wind and wave climates in Lake Kasumigaura which is the second largest lake in Japan. Wind climate is estimated from wind data observed over 1 year every 1 hour at the lake center, so-called Koshin, which shows small seasonal variation of monthly-averaged wind speed with predominant wind directions varying every season. A hybrid parametric wave prediction model is applied for wave hindcast over 1 year in 1991, in which hindcasts show overall agreement with observations at two points. Wave climates in the lake are estimated, based on the hindcasted results at 14 representative points in and around the lake. Conclusions are that wave climate changes point by point corresponding to the fetch characteristics at each point, but that the feature of wave climate with small seasonal variation is common to all the points investigated.

キーワード:

霞ヶ浦，風候，波候，波浪追算，ハイブリッドパラメータモデル

Key words:

Lake Kasumigaura, wind climate, wave climate, wave hindcast, hybrid parametric model
*
愛媛大学工学部土木海洋工学科
Department of Civil and Ocean Engineering, Faculty of Engineering, Ehime University
**
日立造船株式会社
Hitachi Shipbuilding Inc.