离地面或海平面高度(M)123451.1710.740.62101.3810.740.62151.521.140.740.62201.631.250.840.62301.81.4210.62401.921.561.130.73502.031.671.250.84602.121.771.350.93702.21.861.451.02802.271.951.541.11902.342.021.621.191002.42.091.71.271502.642.382.031.612002.832.612.31.922502.992.82.542.193003.122.972.752.453503.123.122.942.684003.123.123.122.914503.123.123.123.12地面粗糙度类别选择地面粗糙离地面或海平D类指有密集建风压高度变化μ z= A类指近海海面B类指田野、乡C类指有密集建A类16.8 米1.56快速查询面粗糙度类别：或海平面高度H=密集建筑群且房屋较高的城市市区度变化系数μ z= 海海面和海岛、海岸、湖岸及沙漠地区；野、乡村、丛林、丘陵以及房屋比较稀疏的乡镇和城市郊区；密集建筑群的城市市区；
