IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 7 - WATER RESOURCES AND HYDROINFORMATICS : Spatial Rainfall Correlations and Their Implications for Raingage Network and Rainfall Interpolation
Spatial Rainfall Correlations and Their Implications for Raingage Network and Rainfall Interpolation
Author : Bellie Sivakumar, Fitsum M. Woldemeskel and Vijay P. Singh
Rainfall data at fine spatial resolutions are needed for various applications in the fields of hydrology, water resources, and environment. However, high spatial resolution rainfall data are not widely available, especially in developing regions. A common practice to obtain such data is through interpolation, based on rainfall data available at coarser resolutions or nearby points. A fundamental assumption in the development of many of the interpolation schemes is the existence of correlation in rainfall across space, with nearby points considered to be more correlated than distant ones. Although this assumption is reasonable, it is also important to note that rainfall correlation alone is not sufficient to examine the spatial rainfall estimation problem, since other factors (e.g. scale, threshold) also play important roles. In the present study, we propose a methodology that combines rainfall correlations, spatial scale, and correlation thresholds for representing spatial rainfall correlations in a region. We apply this method to high-quality monthly rainfall data at a resolution 0.25 x 0.25 latitude\longitude across Australia. Important implications of the results are also discussed.
File Size : 482,005 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 19/07/2016
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