Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall

Abstract This study investigated the variation characteristics of micro-topography during successive erosive stages of water erosion: splash erosion (SpE), sheet erosion (ShE), and rill erosion (RE). Micro-topography was quantified using surface elevation change, soil roughness (SR) and multifractal...

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Autores principales:	Jian Luo, Zicheng Zheng, Tingxuan Li, Shuqin He
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44a9065870724a18ad8aeb99f8448c81
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spelling	oai:doaj.org-article:44a9065870724a18ad8aeb99f8448c812021-12-02T16:07:50ZChanges in micro-relief during different water erosive stages of purple soil under simulated rainfall10.1038/s41598-018-21852-62045-2322https://doaj.org/article/44a9065870724a18ad8aeb99f8448c812018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21852-6https://doaj.org/toc/2045-2322Abstract This study investigated the variation characteristics of micro-topography during successive erosive stages of water erosion: splash erosion (SpE), sheet erosion (ShE), and rill erosion (RE). Micro-topography was quantified using surface elevation change, soil roughness (SR) and multifractal model. Results showed that the area of soil surface elevation decay increased gradually with the development of water erosion. With rainfall, the combined effects of the detachment by raindrop impact and the transport of runoff decreased SR, whereas rill erosion contributed to increase SR. With the increase in slope gradient, soil erosion area gradually decreased at the splash erosion stage. By contrast, soil erosion area initially decreased and then increased at the sheet and rill erosion stages. The width of the D q spectra (ΔD) values increased at the splash erosion stage and then decreased at the sheet and rill erosion stages on the 10° slope, opposite to that on the 15° slope. The ΔD values decreased with the evolution of water erosive stages on the 20° slope. The slope had an enhancing effect on the evolution of water erosion. In this study, we clarified the essence of micro-topography and laid a theoretical foundation for further understanding diverse hydrological processes.Jian LuoZicheng ZhengTingxuan LiShuqin HeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jian Luo Zicheng Zheng Tingxuan Li Shuqin He Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
description	Abstract This study investigated the variation characteristics of micro-topography during successive erosive stages of water erosion: splash erosion (SpE), sheet erosion (ShE), and rill erosion (RE). Micro-topography was quantified using surface elevation change, soil roughness (SR) and multifractal model. Results showed that the area of soil surface elevation decay increased gradually with the development of water erosion. With rainfall, the combined effects of the detachment by raindrop impact and the transport of runoff decreased SR, whereas rill erosion contributed to increase SR. With the increase in slope gradient, soil erosion area gradually decreased at the splash erosion stage. By contrast, soil erosion area initially decreased and then increased at the sheet and rill erosion stages. The width of the D q spectra (ΔD) values increased at the splash erosion stage and then decreased at the sheet and rill erosion stages on the 10° slope, opposite to that on the 15° slope. The ΔD values decreased with the evolution of water erosive stages on the 20° slope. The slope had an enhancing effect on the evolution of water erosion. In this study, we clarified the essence of micro-topography and laid a theoretical foundation for further understanding diverse hydrological processes.
format	article
author	Jian Luo Zicheng Zheng Tingxuan Li Shuqin He
author_facet	Jian Luo Zicheng Zheng Tingxuan Li Shuqin He
author_sort	Jian Luo
title	Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
title_short	Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
title_full	Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
title_fullStr	Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
title_full_unstemmed	Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
title_sort	changes in micro-relief during different water erosive stages of purple soil under simulated rainfall
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/44a9065870724a18ad8aeb99f8448c81
work_keys_str_mv	AT jianluo changesinmicroreliefduringdifferentwatererosivestagesofpurplesoilundersimulatedrainfall AT zichengzheng changesinmicroreliefduringdifferentwatererosivestagesofpurplesoilundersimulatedrainfall AT tingxuanli changesinmicroreliefduringdifferentwatererosivestagesofpurplesoilundersimulatedrainfall AT shuqinhe changesinmicroreliefduringdifferentwatererosivestagesofpurplesoilundersimulatedrainfall
_version_	1718384712536293376

Changes in micro-relief during different water erosive stages of purple soil under simulated rainfall

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