A Study of Total Nitrogen Pollutant Load through Baseflow Analysis at the Watershed

Abstract

It has been well known that it is not easy to quantify pollutant loads driven by non-point source pollution due to various factors affecting generation and transport mechanism of it. Especially pollutant loads through baseflow have been investigated by limited number of researchers. Thus in this study, the Web-based WAPLE (WHAT-Pollutant Load Estimation) system was developed and applied at study watersheds to quantify baseflow contribution of pollutant. In YbB watershed, baseflow contribution with WWTP discharge is responsible for 49.5% of total pollutant loads at the watershed. Among these, pollutant loads through baseflow (excluding any WWTP discharge) is responsible for 61.7% of it. In GbA watershed, it was found that 58.4% is contributed by baseflow with WWTP discharge 2.9% and 97.1% is by baseflow. For NbB watershed (without WWTP discharge), 52.3% of pollutant load is transported through baseflow. As shown in this study, it was found that over 50.0% of TN (Total Nitrogen) pollutant loads are contributed by non-direct runoff. Thus pollutant loads contributed by baseflow and WWTP discharge as well as direct runoff contribution should be quantified to develop and implement watershed-specific Best Management Practices during dry period.

Limitation Analysis on Estimation of SS Pollutant Load using Korean Ministry of Environment's 8-Day Interval Flow and Water Quality data

“…SPCONLinear parameter for calculating the maximum amount of sediment that can be reentrained during channel sediment routing SPEXP parameter for calculating sediment reentrained in channel sediment routing USLE_P USLE equation support practice factor Fig.6. Estimation of pollutant loading using the NI(Choi et al, 2015).기…”

Analysis of Pollutant load Reduction Efficiency with Riparian Buffer System Using the SWAT-REMM

“…그러나 특성화된 하천의 수질개선을 위해서는 직접유출량 뿐만 아니라 기저 유출량에 의한 오염부하를 정량화하여 평가하고 저감시킬 수 있는 방안이 필요하다 할 수 있다 Choi et al, 2015). Table 3에서 방류량 ( …”