| 利用雷达回波与GIS技术反演面雨量研究 |
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| 引用本文： | 何健,王春林,毛夏,孙向明.利用雷达回波与GIS技术反演面雨量研究[J].气象科技,2006,34(3):336-339,i0002. |
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| 作者姓名： | 何健 王春林 毛夏 孙向明 |
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| 作者单位： | 1. 广东省气象局气候与农业气象中心,广州,510080
2. 深圳市气象局,深圳,518001 |
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| 摘 要： | 自动气象站可以直接测量单点或较小范围的降水量,测量精度较高,但自动气象站的分布密度不够,往往漏掉强降水、暴雨中心。雷达能实时探测云和降水结构及系统发生、发展演变情况,能迅速提供一定区域的实时降水情况,但雷达测量误差较大,测定局地降水量精度不高,因此,将自动气象站与雷达进行点面结合,采用一定的数学方法和GIS技术,可以得到能够代表某特定区域平均降水情况的面雨量。以深圳市行政区域面雨量反演为例,建立区域内所有测站的6 min累积降雨资料与雷达回波数据之间的回归关系,借助GIS技术和包括对经度、纬度、海拔高度3个因子的地理订正,构建雷达图上特定行政区域的面雨量计算模型,并对格点拟合雨量进行空间分辨率的精细化反演,得到雷达图上的特定行政区域的面雨量图。
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| 关 键 词： | 面雨量 多普勒雷达 GIS |
| 收稿时间： | 2005-03-29 |
| 修稿时间： | 2005-03-292005-08-17 |
Research on Radar Echoes and GIS Technique for Deducing Regional Rainfall |
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| He Jian,Wang Chunlin,Mao Xi,Sun Xiangming.Research on Radar Echoes and GIS Technique for Deducing Regional Rainfall[J].Meteorological Science and Technology,2006,34(3):336-339,i0002. |
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| Authors: | He Jian Wang Chunlin Mao Xi Sun Xiangming |
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| Institution: | 1 Guangdong Climate and Agrometeorology Center, Guangzhou 510080; 2 Shenzhen Municipal Meteorological Bureau, Shenzhen 518001 |
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| Abstract: | An automatic weather station can directly measure the rainfall of a single station or within a small range with higher precision,but it often omits severe rainfall centers or gusts because of its inadequate distribution density.Radars can probe the structure of clouds and precipitation,trace them from beginning to the end in real time,and provide the real-time precipitation of a specific region rapidly,but their measurement errors are relatively large and the precision of local rainfall measurements is not high.Combining automatic weather stations with radars,applying mathematical methods and GIS techniques,the areal rainfall that represents the mean rainfall of a specific region can be obtained.As an example of deducing the areal rainfall,the regression relationship between six-minute accumulative rain by automatic weather stations and radar echoes over Shenzhen is established by means of GIS techniques and the geographic modification of the three factors(longitude,latitude,and sea level elevation).The calculation model of the area rainfall of a specific area on radar map is developed;and then the high-precision high-resolution(spatial) grid fitting rainfall is gained;thus the areal rainfall distribution of a specific area from radar map is obtained. |
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| Keywords: | regional rainfall Doppler radar GIS technique |
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