.png){kind=icon}
返回
Development of a precipitation nowcasting algorithm based upon optical flow techniques
.png){kind=icon}
PRE
AI
DOI：10.1016/j.jhydrol.2003.11.011.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
A new advection-based nowcasting scheme for precipitation has been developed for the Gandolf system. The method employed removes the need to split the radar analysis into contiguous rain areas (CRA's) and uses a smoothness constraint. Thus, it is similar to the Variational Echo Tracking approach. Optical flow ideas are used to diagnose the advection velocity of blocks within rain analyses, which involve the direct solution of the Lagrangian persistence equation. In block-based approaches, the radar analyses are partitioned a-priori and a CRA may be split over a number of blocks. This scheme is compared with the old Gandolf advection scheme, which is based on CRA's, and the new scheme performs better-both in cases associated with severe flooding and over a continuous verification period of 3 months. The benefit is conjectured to be due mainly to the difficulty in unambiguously identifying CRA's, which is particularly troublesome on small domains, such as the UK. Thus, it is concluded that block-based methods are likely to be superior to object-based methods in the majority of cases. Crown Copyright (C) 2003 Published by Elsevier B.V. All rights reserved.
Keyword:
advection
precipitation
radar
radar extrapolation
rainfall
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
6.3
论文数:
2.4W
被引数:
9.8W
机构
暂无机构信息
引用论文
Analysis of electromyographic signals in human jaw closing muscles at various isometric force levels
PREAI
分享收藏The storm cell identification and tracking algorithm: An enhanced WSR-88D algorithm风暴细胞识别与跟踪算法: 一种增强的WSR-88D算法
OAAI
OAAI分享收藏分享收藏
Verification of precipitation in weather systems: determination of systematic errors.png)
JOURNAL OF HYDROLOGY
JOURNAL OF HYDROLOGYIF6.3
PREAI
分享收藏分享收藏
查看更多内容