Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology

Characteristics of Runoff Nutrient Loss and Particle Size Distribution of Eroded Sediment under Varied Rainfall Intensities

Authors
Guanhua Zhang
Corresponding Author
Guanhua Zhang
Available Online March 2016.
DOI
https://doi.org/10.2991/icmmct-16.2016.119How to use a DOI?
Keywords
Nutrients loss, runoff and sediment, particle size distribution, simulated rainfall
Abstract
Soil erosion is a serious problem of worldwide concern. Rainfall intensity is an important factor affecting soil erosion and the resulting nutrients loss. Field experiments were conducted to investigate the effect of rainfall intensity (60, 100 and 140 mm/h) on runoff nutrients loss and sediment particles size distribution under simulated rainfall conditions. The results showed that rainfall intensity had a significant effect on runoff, sediment and the associated nutrients loss. In general, higher rainfall intensity led to higher runoff nutrients loss. Furthermore, the nutrients mostly lost through sediment instead of runoff water. Inorganic nitrogen loss was mainly due to runoff, primarily in the form of NO3-N. Positive linear relationships existed between soil loss and nutrients loss. Rainfall intensity had more significant effects on enrichment ratio of nitrogen (ERN) than that of organic matter (EROM) and phosphorus (ERP). Compared with the original surface soil, the sediment contained more fine particles (<20m). The clay content significantly decreased with increasing rainfall intensity (p<0.05). ER of sediment-bound nutrients was positively correlated with ER of particles smaller than 2m. This suggested that the clay fraction (<2µm) was preferentially eroded and soil nutrients were mainly adsorbed on or contained within this part of particles.
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Volume Title
Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology
Series
Advances in Engineering Research
Publication Date
March 2016
ISBN
978-94-6252-165-0
ISSN
2352-5401
DOI
https://doi.org/10.2991/icmmct-16.2016.119How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Guanhua Zhang
PY  - 2016/03
DA  - 2016/03
TI  - Characteristics of Runoff Nutrient Loss and Particle Size Distribution of Eroded Sediment under Varied Rainfall Intensities
BT  - Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology
PB  - Atlantis Press
SP  - 587
EP  - 595
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmct-16.2016.119
DO  - https://doi.org/10.2991/icmmct-16.2016.119
ID  - Zhang2016/03
ER  -