Assessing the relationships between elevation and extreme precipitation with various durations in southern Taiwan using spatial regression models
Article first published online: 9 JAN 2012
Copyright © 2011 John Wiley & Sons, Ltd.
Volume 26, Issue 21, pages 3174–3181, 15 October 2012
How to Cite
Chu, H.-J. (2012), Assessing the relationships between elevation and extreme precipitation with various durations in southern Taiwan using spatial regression models. Hydrol. Process., 26: 3174–3181. doi: 10.1002/hyp.8403
- Issue published online: 17 SEP 2012
- Article first published online: 9 JAN 2012
- Accepted manuscript online: 12 NOV 2011 04:53AM EST
- Manuscript Accepted: 1 NOV 2011
- Manuscript Received: 23 JUL 2011
- extreme precipitation;
- geographically weighted regression (GWR);
- simultaneous autoregression (SAR);
- conditional autoregression (CAR)
A spatially autocorrelated effect exists in precipitation of a mountainous basin. This study examines the relationship between maximum annual rainfall and elevation in the Kaoping River Basin of southern Taiwan using spatial regression models (i.e. geographically weighted regression (GWR), simultaneous autoregression (SAR), and conditional autoregression (CAR)).
Results show that the GWR, SAR, and CAR models can improve spatial data fitting and provide an enhanced estimation for the rainfall–elevation relationship than the ordinary least squares approach. In particular, GWR achieves the most accurate estimation, and SAR and CAR achieve similar performance in terms of the Akaike information criterion. The relationship between extreme rainfall and elevation for longer duration is more concise than that for short durations. Results show that the spatial distribution of precipitation depends on elevation and that rainfall patterns in study area are heterogeneous between the southwestern plain and the eastern mountain area. Copyright © 2011 John Wiley & Sons, Ltd.