Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Effect of rock fragment cover on nutrient loss under varied rainfall intensities : A laboratory study

Li, Hanzhi ; Fan, Dengxing ; Niu, Jianzhi ; Jia, Guodong ; Sun, Jiamei ; Yu, Xinxiao and Zhang, Linus LU orcid (2018) In Hydrology Research 49(2). p.390-406
Abstract

Surface rock fragments retard overland flow discharge, reduce the runoff generation rate and soil erosion as well as nutrients loss. In Northwest China, a common method for minimizing water, soil, and nutrient losses is the use of rock fragment cover. We used lab stimulation testing to evaluate rock fragment cover efficacy for nutrient conservation. Nutrient losses were determined in both the runoff and sediments under three rain intensities (30, 60 and 90 mm·h1), four rock fragment covers (0, 10, 20 and 30%) and a slope of 10. The results showed that rock fragment cover significantly reduced the nutrient losses. Compared with the bare soil control, the rock fragment cover reduced the runoff volume and sediments by 18-38 and... (More)

Surface rock fragments retard overland flow discharge, reduce the runoff generation rate and soil erosion as well as nutrients loss. In Northwest China, a common method for minimizing water, soil, and nutrient losses is the use of rock fragment cover. We used lab stimulation testing to evaluate rock fragment cover efficacy for nutrient conservation. Nutrient losses were determined in both the runoff and sediments under three rain intensities (30, 60 and 90 mm·h1), four rock fragment covers (0, 10, 20 and 30%) and a slope of 10. The results showed that rock fragment cover significantly reduced the nutrient losses. Compared with the bare soil control, the rock fragment cover reduced the runoff volume and sediments by 18-38 and 11-69%, respectively, and reduced N and P losses by 9-43 and 16-70%, respectively. These results indicate that rock fragment cover is an effective method for reducing land degradation and improving local environmental conditions.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nutrient loss, Rock fragment cover, Simulated rainfall, Soil, Water conservation
in
Hydrology Research
volume
49
issue
2
pages
17 pages
publisher
IWA Publishing
external identifiers
  • scopus:85045734880
ISSN
1998-9563
DOI
10.2166/nh.2017.026
language
English
LU publication?
yes
id
ce184329-792f-4903-a855-4adc068b18ac
date added to LUP
2018-05-23 10:52:59
date last changed
2022-04-25 07:30:35
@article{ce184329-792f-4903-a855-4adc068b18ac,
  abstract     = {{<p>Surface rock fragments retard overland flow discharge, reduce the runoff generation rate and soil erosion as well as nutrients loss. In Northwest China, a common method for minimizing water, soil, and nutrient losses is the use of rock fragment cover. We used lab stimulation testing to evaluate rock fragment cover efficacy for nutrient conservation. Nutrient losses were determined in both the runoff and sediments under three rain intensities (30, 60 and 90 mm·h<sup>1</sup>), four rock fragment covers (0, 10, 20 and 30%) and a slope of 10. The results showed that rock fragment cover significantly reduced the nutrient losses. Compared with the bare soil control, the rock fragment cover reduced the runoff volume and sediments by 18-38 and 11-69%, respectively, and reduced N and P losses by 9-43 and 16-70%, respectively. These results indicate that rock fragment cover is an effective method for reducing land degradation and improving local environmental conditions.</p>}},
  author       = {{Li, Hanzhi and Fan, Dengxing and Niu, Jianzhi and Jia, Guodong and Sun, Jiamei and Yu, Xinxiao and Zhang, Linus}},
  issn         = {{1998-9563}},
  keywords     = {{Nutrient loss; Rock fragment cover; Simulated rainfall; Soil; Water conservation}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{2}},
  pages        = {{390--406}},
  publisher    = {{IWA Publishing}},
  series       = {{Hydrology Research}},
  title        = {{Effect of rock fragment cover on nutrient loss under varied rainfall intensities : A laboratory study}},
  url          = {{http://dx.doi.org/10.2166/nh.2017.026}},
  doi          = {{10.2166/nh.2017.026}},
  volume       = {{49}},
  year         = {{2018}},
}