摘要
用趋势面分析方法,对黄土高原降水分布效应的研究表明:黄土高原地区降水量的空间分布趋势决定于地理位置和海拔高度;东南部及东部暖湿气流是支配黄土高原降水的主导气流,其中东南气流作用稍强。坡向、坡度、植被条件及地形对降水也有一定影响,如秦岭北坡、太行山西坡等背风坡可使降水比理论值减少5%～7%;干旱及荒漠区减少14%左右;而高原中的突立山系(如六盘山—陇山)则使降水增幅约16%。
It has been studied that the amount of precipitation in the Loess Plateau is controlled by geographical location and elevation mainly. The analysis of trend area shows that the precipitation is also affected by slope exposure,gradient,vegetational and topographical conditions, and so on. The warm—wet air curents from southeast and east are the dominant ones for the occurrence of precipitation in the Loess Plateau. In chich the air crurrent from southeast is a little stronger than that from east. It is obvious that the synthetic factors affect on precipitation in the Loess plateau. For example, the precipitation on northern slope of the Qinling Mountains and western slope of the Taihang Mountains is 5—7% less than their theoretical value;it is 14% more than their theoretical value in the dry and desert regions,and increases 16% comparing with their theoretical value in high mountains of the Loess plateau,such as in the Liupanshan Mountains and Longshan Mountains.
出处
《干旱区地理》
CSCD
北大核心
1993年第2期71-76,共6页
Arid Land Geography
关键词
黄土高原
降水
趋势面
地理因素
Loess Platear,Precopitation,Analysis of trend area
