摘要
选取地处长江三峡河谷(湖北侧)的香溪长江公路大桥桥位区(郭家坝站)附近沿江3个气象站、6个自动站多年的风速、风向资料进行对比分析,讨论了峡谷对河谷内不同区域风速的不同影响。结果表明:在水平方向上,烟墩堡、郭家坝、庙堡等临江3站平均风速偏大、最大风速及极大风速出现大值频次偏高,狭管效应明显,其余非临江站则受局地地形遮蔽影响平均风速偏小、最大风速及极大风速出现大值频率偏低;在垂直方向上,150 m以下风速几乎没有明显的高度变化,实测风廓线指数几乎为0;桥位处阵风性强,阵风系数为1.56。
We select three meteorological stations and six automatic weather stations which are located along the three gorges valley（in Hubei Province） nearby Xiangxi Yangtze River Highway Bridge（Guojiaba meteorological station）. We collected wind speed and wind direction data for comparative analysis, and analyzed the different influence of wind speed in different regions of the valley. The results showed that, in the horizontal direction, the three automatic weather stations of Yandunbao, Guojiaba and Miaobao are near the river, presenting an obvious funnel effect, where average wind speeds are larger, and the frequencies of high-value of maximum wind speed and extreme wind speed increase. The rest of stations located not near the river are affected by the local terrain where average wind speeds are smaller, maximum wind speed and extreme wind speed in large frequency are low; In the vertical direction, the wind speed under 150 meters not change in height, the measured wind-profiling index is approximately zero; At the location of bridge, the value of gust factor is 1.56 where gustiness is strong.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2016年第5期851-858,共8页
Resources and Environment in the Yangtze Basin
基金
行业专项(GYHY201306023
GYHY201206013)
三峡工程生态环境监测项目(JJ2015-005)
大渡河气候影响项目(PBG-QT-2013-026)
宜昌香溪长江公路大桥--桥位气候背景和风参数研究~~
