地形对沈北新区汛期降水影响分析

利用辽宁省单站雷达实时资料、沈阳市气象局、沈北新区气象局气象观测资料,采用天气学分析方法,从地形特点、天气学原理等方面探讨地形对沈北新区汛期降水的影响.结果表明,该区历年12 h降水量≥30 mm日数为5d,24h降水量≥50 mm日数为2d.一般稳定天气过程与全市平均雨量接近或稍多,雷雨阵性等不稳定天气过程比全市平均雨量高1～2个量级,多短时暴雨天气,给该区防汛工作造成一定压力.

Effects of Terrain on Precipitation of Shenbei New Area in Flood Period

Using l,iaoning radar real time data, meteorological obser,ation data of Shenyang Meteorological Bureau and Shenbei New Area Mete- rological Bureau, effeels of terrain on preeipilatiou of Shenbei new area in flood period were discussed frum aspects of terrain characteristics and sy.optir theor7 with synoplie analysis melhod. Over the years, rainfall amounts in this area, 12 hours rainfall 〉/ 30 mm was 5 days, 24 hours rainfall i〉50 mm was 2 days. （nerally, the widespread rain weather is close to or slightly more than the average rainfall amounts of this city. The thundershowers synopli, process is higher＂ Ihan Ihe average raintdl amounts （al）oul 1 to 2 orders）, and much shurl-term rainstorm weather＂ leads to （erlaiu pressure to the work of flood control.