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Tytuł pozycji:

Estimation of rainfall erosivity based on WRF-derived raindrop size distributions

Tytuł :
Estimation of rainfall erosivity based on WRF-derived raindrop size distributions
Autorzy :
Q. Dai
J. Zhu
S. Zhang
S. Zhu
D. Han
G. Lv
Pokaż więcej
Temat :
Technology
Environmental technology. Sanitary engineering
TD1-1066
Geography. Anthropology. Recreation
Environmental sciences
GE1-350
Źródło :
Hydrology and Earth System Sciences, Vol 24, Pp 5407-5422 (2020)
Wydawca :
Copernicus Publications, 2020.
Rok publikacji :
2020
Kolekcja :
LCC:Technology
LCC:Environmental technology. Sanitary engineering
LCC:Geography. Anthropology. Recreation
LCC:Environmental sciences
Typ dokumentu :
article
Opis pliku :
electronic resource
Język :
English
ISSN :
1027-5606
1607-7938
Relacje :
https://hess.copernicus.org/articles/24/5407/2020/hess-24-5407-2020.pdf; https://doaj.org/toc/1027-5606; https://doaj.org/toc/1607-7938
DOI :
10.5194/hess-24-5407-2020
Dostęp URL :
https://doaj.org/article/e195bb281e3a414691a5b8e08622da22
Numer akcesji :
edsdoj.195bb281e3a414691a5b8e08622da22
Czasopismo naukowe
Soil erosion can cause various ecological problems, such as land degradation, soil fertility loss, and river siltation. Rainfall is the primary water-driven force for soil erosion, and its potential effect on soil erosion is reflected by rainfall erosivity that relates to the raindrop kinetic energy. As it is difficult to observe large-scale dynamic characteristics of raindrops, all the current rainfall erosivity models use the function based on rainfall amount to represent the raindrops' kinetic energy. With the development of global atmospheric re-analysis data, numerical weather prediction techniques become a promising way to estimate rainfall kinetic energy directly at regional and global scales with high spatial and temporal resolutions. This study proposed a novel method for large-scale and long-term rainfall erosivity investigations based on the Weather Research and Forecasting (WRF) model, avoiding errors caused by inappropriate rainfall–energy relationships and large-scale interpolation. We adopted three microphysical parameterizations schemes (Morrison, WDM6, and Thompson aerosol-aware) to obtain raindrop size distributions, rainfall kinetic energy, and rainfall erosivity, with validation by two disdrometers and 304 rain gauges around the United Kingdom. Among the three WRF schemes, Thompson aerosol-aware had the best performance compared with the disdrometers at a monthly scale. The results revealed that high rainfall erosivity occurred in the west coast area at the whole country scale during 2013–2017. The proposed methodology makes a significant contribution to improving large-scale soil erosion estimation and for better understanding microphysical rainfall–soil interactions to support the rational formulation of soil and water conservation planning.

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