【作者】 张旭东； 辛吉武； 王润元； 尹东；

【Author】 ZHANG Xudong1,2, XIN Jiwu3, WANG Runyuan1,YING Dong4 (1.Lanzhou Arid Institute of Meteorology ,China Meteorological Administration , Key Laboratory of Arid Climatic Change and Reducing Disaster in Gansu Province,Lanzhou 730020 ,China;2.Lanzhou Regional Climate Center, Lanzhou 730020,China;3. Hainan Meteorological Bureau,Haikou,570203 , China;4. Gansu Meteorological Bureau,Lanzhou, 730020 ,China)

【机构】 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室； 兰州区域气候中心； 海南省气象局； 甘肃省气象局；

【摘要】 本文基于甘肃省80个气象站近30年(1971-2000年)的降水量资料,利用地理信息系统(GIS)技术进行了数据栅格化。结果表明:采用趋势面分析、逐步回归、宏观地理因子模拟与小地形订正等方法,建立全省降水空间分布的数学模型,平均相对误差为1.5%。从推算结果可以看出:甘肃省降水资源分布差异很大,从100mm以下到800mm以上均有分布,而且基本上呈现由东南向西北逐级减少的趋势;甘肃省干旱区(r<300mm)面积最大,达到184144.01km2,占到全省面积的46.6%。更多还原

【Abstract】 Based on precipitation data of 80 meteorological observation stations in Gansu Province in the latest 30 years (1971-2000), the geographic information system (GIS) method was used to rasterize the data. The results showed that the mathematic model about precipitation space distribution in the whole province built by the methods stepwise regression, macro geographical factors simulation and revision of little topographic influence and etc. has characteristics of less error. The average relative error was 1.5%. The calculated result indicated that the difference of precipitation resource distribution in Gansu Province is very big over a wide range from 100mm to 800mm, which displayed a tendency of decreasing from southeast to northwest mainly. The arid area (r<300mm) was 184144.01km2 in Gansu Province, accounting for 46.6% of the whole province’s area.更多还原