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| Titel |
Temporal and spatial variations of rainfall erosivity in Southern Taiwan |
| VerfasserIn |
Ming-Hsi Lee, Huan-Hsuan Lin, Chun-Kuang Chu |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088306
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| Publikation (Nr.) |
 EGU/EGU2014-2397.pdf |
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| Zusammenfassung |
| Soil erosion models are essential in developing effective soil and water resource
conservation strategies. Soil erosion is generally evaluated using the Universal Soil Loss
Equation (USLE) with an appropriate regional scale description. Among factors
in the USLE model, the rainfall erosivity index (R) provides one of the clearest
indications of the effects of climate change. Accurate estimation of rainfall erosivity
requires continuous rainfall data; however, such data rarely demonstrate good spatial
and temporal coverage. The data set consisted of 9240 storm events for the period
1993 to 2011, monitored by 27 rainfall stations of the Central Weather Bureau
(CWB) in southern Taiwan, was used to analyze the temporal-spatial variations of
rainfall erosivity. The spatial distribution map was plotted based on rainfall erosivity
by the Kriging interpolation method. Results indicated that rainfall erosivity is
mainly concentrated in rainy season from June to November typically contributed
90% of the yearly R factor. The temporal variations of monthly rainfall erosivity
during June to November and annual rainfall erosivity have increasing trend from
1993 to 2011. There is an increasing trend from southwest to northeast in spatial
distribution of rainfall erosivity in southern Taiwan. The results further indicated that
there is a higher relationship between elevation and rainfall erosivity. The method
developed in this study may also be useful for sediment disasters on Climate Change. |
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