Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Event Mean Concentration of Nitrogen and Phosphorus from a Dairy and Crop Farming Complex Watershed

  • Yoon, Kwang-Sik (Department of Biosystems & Agricultural Engineering, Institute of Agricultural Science and Technology, Chonnam National University) ;
  • Shirmohammadi, Adel (Department of Bioengineering, University of Maryland college Park) ;
  • Choi, Woo-Jung (Department of Biosystems & Agricultural Engineering, Institute of Agricultural Science and Technology, Chonnam National University) ;
  • Jung, Jae-Woon (Department of Biosystems & Agricultural Engineering, Institute of Agricultural Science and Technology, Chonnam National University)
  • Published : 2006.12.30
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Abstract

Event mean concentration (EMC) of nitrogen (N) and phosphorus (P) is primary information for non-point source pollution assessment of a watershed. The EMCs for various types of agriculture such as dairy and crop farming under different climate and geologic conditions are not fully investigated. A diary- and cropfarming complex agricultural watershed in Piedmont region in Maryland, USA has been monitored for 10 years as a section 319 national monitoring program of US EPA. Dairy manure was the main source of fertilizer for crop farming in this watershed. Observed mean concentrations of N and P for each event were analyzed. Distribution of EMCs for N and P showed a wide range of variations. Representative EMCs of T-N and $NO_{3}-N$ tended to be higher than those reported for other agricultural watersheds. This study confirmed that site-specific EMC information for various agricultural practices is required for better assessment of non-point source pollution using EMC method.

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References

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