Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Filters applied. Clear all
. 2016 Dec;188(12):692.
doi: 10.1007/s10661-016-5681-9. Epub 2016 Nov 25.

Export of Non-Point Source Suspended Sediment, Nitrogen, and Phosphorus From Sloping Highland Agricultural Fields in the East Asian Monsoon Region

Affiliations

Export of Non-Point Source Suspended Sediment, Nitrogen, and Phosphorus From Sloping Highland Agricultural Fields in the East Asian Monsoon Region

Arif Reza et al. Environ Monit Assess. .

Abstract

Excess sediment and nutrient export from agricultural fields with steep slopes is a major concern linked to surface water quality in Korea. In this study, the export of suspended sediment (SS), total nitrogen (TN), and total phosphorus (TP) and their event mean concentrations (EMCs) in surface runoff from a highland mixed land use (61% forested, 30% cropped, 9% other) watershed were quantified. In 2007, the Korean Ministry of Environment (MoE) declared the study area as a priority region for non-point source (NPS) pollution management and initiated various best management practices (BMPs) in the study watershed. SS, TN, and TP concentrations in Mandae Stream were monitored for 5 years (2009-2013) to evaluate the effectiveness of BMPs. Average EMCs for SS, TN, and TP were as high as 986, 3.4 and 0.8 mg/L, respectively. The agricultural export coefficients of agricultural land in the study watershed for SS, TN, and TP were 5611, 171, and 6.83 kg/ha/year, respectively. A comparison with results from other studies shows that both EMCs and agricultural export coefficients in the study watershed were much higher than most of the results reported for watersheds in other regions. The results show that sediment and nutrient export from intensive agriculture areas with steep slopes continue to be a major concern for the downstream reservoir, Lake Soyang. Remedial strategies should be directed towards controlling sources of SS, TN, and TP to improve downstream water quality in sloping highland agricultural areas in Korea.

Keywords: Event mean concentration (EMC); Korea; Monsoon; Nitrogen; Non-point source; Phosphorus.

Similar articles

See all similar articles

References

    1. Water Environ Res. 2002 Jan-Feb;74(1):100-8 - PubMed
    1. Environ Monit Assess. 2008 May;140(1-3):147-59 - PubMed
    1. Sci Total Environ. 2011 Apr 15;409(10):1739-45 - PubMed
    1. J Environ Sci (China). 2010;22(6):801-5 - PubMed
    1. Environ Monit Assess. 2002 Jun;76(2):213-48 - PubMed

LinkOut - more resources

Feedback