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Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China

Rainfall patterns and land cover are two important factors that affect the runoff generation process. To determine the surface and subsurface flows associated with different rainfall patterns on sloping Ferralsols under different land cover types, observational data related to surface and subsurface...

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Autores principales: Duan, Jian, Yang, Jie, Tang, Chongjun, Chen, Lihua, Liu, Yaojun, Wang, Lingyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5549742/
https://www.ncbi.nlm.nih.gov/pubmed/28792507
http://dx.doi.org/10.1371/journal.pone.0182706
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author Duan, Jian
Yang, Jie
Tang, Chongjun
Chen, Lihua
Liu, Yaojun
Wang, Lingyun
author_facet Duan, Jian
Yang, Jie
Tang, Chongjun
Chen, Lihua
Liu, Yaojun
Wang, Lingyun
author_sort Duan, Jian
collection PubMed
description Rainfall patterns and land cover are two important factors that affect the runoff generation process. To determine the surface and subsurface flows associated with different rainfall patterns on sloping Ferralsols under different land cover types, observational data related to surface and subsurface flows from 5 m × 15 m plots were collected from 2010 to 2012. The experiment was conducted to assess three land cover types (grass, litter cover and bare land) in the Jiangxi Provincial Soil and Water Conservation Ecological Park. During the study period, 114 natural rainfall events produced subsurface flow and were divided into four groups using k-means clustering according to rainfall duration, rainfall depth and maximum 30-min rainfall intensity. The results showed that the total runoff and surface flow values were highest for bare land under all four rainfall patterns and lowest for the covered plots. However, covered plots generated higher subsurface flow values than bare land. Moreover, the surface and subsurface flows associated with the three land cover types differed significantly under different rainfall patterns. Rainfall patterns with low intensities and long durations created more subsurface flow in the grass and litter cover types, whereas rainfall patterns with high intensities and short durations resulted in greater surface flow over bare land. Rainfall pattern I had the highest surface and subsurface flow values for the grass cover and litter cover types. The highest surface flow value and lowest subsurface flow value for bare land occurred under rainfall pattern IV. Rainfall pattern II generated the highest subsurface flow value for bare land. Therefore, grass or litter cover are able to convert more surface flow into subsurface flow under different rainfall patterns. The rainfall patterns studied had greater effects on subsurface flow than on total runoff and surface flow for covered surfaces, as well as a greater effect on surface flows associated with bare land.
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spelling pubmed-55497422017-08-12 Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China Duan, Jian Yang, Jie Tang, Chongjun Chen, Lihua Liu, Yaojun Wang, Lingyun PLoS One Research Article Rainfall patterns and land cover are two important factors that affect the runoff generation process. To determine the surface and subsurface flows associated with different rainfall patterns on sloping Ferralsols under different land cover types, observational data related to surface and subsurface flows from 5 m × 15 m plots were collected from 2010 to 2012. The experiment was conducted to assess three land cover types (grass, litter cover and bare land) in the Jiangxi Provincial Soil and Water Conservation Ecological Park. During the study period, 114 natural rainfall events produced subsurface flow and were divided into four groups using k-means clustering according to rainfall duration, rainfall depth and maximum 30-min rainfall intensity. The results showed that the total runoff and surface flow values were highest for bare land under all four rainfall patterns and lowest for the covered plots. However, covered plots generated higher subsurface flow values than bare land. Moreover, the surface and subsurface flows associated with the three land cover types differed significantly under different rainfall patterns. Rainfall patterns with low intensities and long durations created more subsurface flow in the grass and litter cover types, whereas rainfall patterns with high intensities and short durations resulted in greater surface flow over bare land. Rainfall pattern I had the highest surface and subsurface flow values for the grass cover and litter cover types. The highest surface flow value and lowest subsurface flow value for bare land occurred under rainfall pattern IV. Rainfall pattern II generated the highest subsurface flow value for bare land. Therefore, grass or litter cover are able to convert more surface flow into subsurface flow under different rainfall patterns. The rainfall patterns studied had greater effects on subsurface flow than on total runoff and surface flow for covered surfaces, as well as a greater effect on surface flows associated with bare land. Public Library of Science 2017-08-08 /pmc/articles/PMC5549742/ /pubmed/28792507 http://dx.doi.org/10.1371/journal.pone.0182706 Text en © 2017 Duan et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Duan, Jian
Yang, Jie
Tang, Chongjun
Chen, Lihua
Liu, Yaojun
Wang, Lingyun
Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title_full Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title_fullStr Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title_full_unstemmed Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title_short Effects of rainfall patterns and land cover on the subsurface flow generation of sloping Ferralsols in southern China
title_sort effects of rainfall patterns and land cover on the subsurface flow generation of sloping ferralsols in southern china
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5549742/
https://www.ncbi.nlm.nih.gov/pubmed/28792507
http://dx.doi.org/10.1371/journal.pone.0182706
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