Next Article in Journal
The Vietnamese State and Administrative Co-Management of Nature Reserves
Previous Article in Journal
Planning Support Systems (PSS)-Based Spatial Plan Alternatives and Environmental Assessment
Article Menu

Export Article

Open AccessArticle
Sustainability 2016, 8(3), 288; doi:10.3390/su8030288

Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed

1
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130000, China
2
College of Environment and Resource, Jilin University, Changchun 130000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Marc A. Rosen
Received: 10 February 2016 / Revised: 14 March 2016 / Accepted: 15 March 2016 / Published: 22 March 2016
View Full-Text   |   Download PDF [4822 KB, uploaded 22 March 2016]   |  

Abstract

Riparian buffers can influence water quality in downstream lakes or rivers by buffering non-point source pollution in upstream agricultural fields. With increasing nitrogen (N) pollution in small agricultural watersheds, a major function of riparian buffers is to retain N in the soil. A series of field experiments were conducted to monitor pollutant transport in riparian buffers of small watersheds, while numerical model-based analysis is scarce. In this study, we set up a field experiment to monitor the retention rates of total N in different widths of buffer strips and used a finite element model (HYDRUS 2D/3D) to simulate the total N transport in the riparian buffer of an agricultural non-point source polluted area in the Liaohe River basin. The field experiment retention rates for total N were 19.4%, 26.6%, 29.5%, and 42.9% in 1,3,4, and 6m-wide buffer strips, respectively. Throughout the simulation period, the concentration of total N of the 1mwide buffer strip reached a maximum of 1.27 mg/cm3 at 30 min, decreasing before leveling off. The concentration of total N about the 3mwide buffer strip consistently increased, with a maximum of 1.05 mg/cm3 observed at 60 min. Under rainfall infiltration, the buffer strips of different widths showed a retention effect on total N transport, and the optimum effect was simulated in the 6mwide buffer strip. A comparison between measured and simulated data revealed that finite element simulation could simulate N transport in the soil of riparian buffer strips. View Full-Text
Keywords: finite element model; rainfall infiltration; pollutant retention; numerical modeling; agricultural watershed finite element model; rainfall infiltration; pollutant retention; numerical modeling; agricultural watershed
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Lin, X.; Tang, J.; Li, Z.; Li, H. Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed. Sustainability 2016, 8, 288.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top