HIGH-RESOLUTION RAINFALL MEASUREMENTS BY RADAR FOR VERY SMALL BASINS - THE SAMPLING PROBLEM REEXAMINED

被引：139

作者：

FABRY, F ^{[1
]}

BELLON, A ^{[1
]}

DUNCAN, MR ^{[1
]}

AUSTIN, GL ^{[1
]}

机构：

[1] UNIV AUCKLAND,DEPT PHYS,AUCKLAND,NEW ZEALAND

来源：

JOURNAL OF HYDROLOGY | 1994年 / 161卷 / 1-4期

关键词：

D O I：

10.1016/0022-1694(94)90138-4

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The dependence of the accuracy of short-period radar rainfall accumulations on periodic sampling of the rainfield is investigated. It is shown that errors due to sampling can be greater than all the other errors combined if accumulations are improperly computed. However, if the movement and the development of the storms are taken into account, these errors can be reduced dramatically. Using an accumulation method taking storm movement and evolution into account, the space and time resolution of radar maps resulting in the most accurate 5 min accumulations over areas smaller than 1 km2 was determined. It is shown that the best accumulations are obtained with very high time resolution data. Furthermore, for a given time resolution, there is an optimum spatial resolution that minimizes rainfall accumulation errors.

引用

页码：415 / 428

页数：14

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