Next Article in Journal
Stormwater Management: Calculation of Traffic Area Runoff Loads and Traffic Related Emissions
Previous Article in Journal
Existing Opportunities to Adapt the Rio Grande/Bravo Basin Water Resources Allocation Framework
Article Menu

Export Article

Open AccessArticle
Water 2016, 8(7), 292; doi:10.3390/w8070292

Development of Field Pollutant Load Estimation Module and Linkage of QUAL2E with Watershed-Scale L-THIA ACN Model

Water Pollution Load Management Research Division, National Institute of Environmental Research, Seogu, Incheon 22689, Korea
Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47907-2093, USA
Department of Biological and Agricultural Engineering, Texas A&M University, College Station, TX 77843, USA
Water Resources Research Centre, K-Water Institute, Daejeon 34350, Korea
Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Korea
Author to whom correspondence should be addressed.
Academic Editor: Karl-Erich Lindenschmidt
Received: 22 April 2016 / Revised: 24 June 2016 / Accepted: 11 July 2016 / Published: 15 July 2016
View Full-Text   |   Download PDF [2537 KB, uploaded 15 July 2016]   |  


The Long Term Hydrologic Impact Assessment (L-THIA) model was previously improved by incorporating direct runoff lag time and baseflow. However, the improved model, called the L-THIA asymptotic curve number (ACN) model cannot simulate pollutant loads from a watershed or instream water quality. In this study, a module for calculating pollutant loads from fields and through stream networks was developed, and the L-THIA ACN model was combined with the QUAL2E model (The enhanced stream water quality model) to predict instream water quality at a watershed scale. The new model (L-THIA ACN-WQ) was applied to two watersheds within the Korean total maximum daily loads management system. To evaluate the model, simulated results of total nitrogen (TN) and total phosphorus (TP) were compared with observed water quality data collected at eight-day intervals. Between simulated and observed data for TN pollutant loads in Dalcheon A watershed, the R2 and Nash–Sutcliffe efficiency (NSE) were 0.81 and 0.79, respectively, and those for TP were 0.79 and 0.78, respectively. In the Pyungchang A watershed, the R2 and NSE were 0.66 and 0.64, respectively, for TN and both statistics were 0.66 for TP, indicating that model performed satisfactorily for both watersheds. Thus, the L-THIA ACN-WQ model can accurately simulate streamflow, instream pollutant loads, and water quality. View Full-Text
Keywords: L-THIA ACN; pollutant loads; QUAL2E; simulation; TN; TP; water quality L-THIA ACN; pollutant loads; QUAL2E; simulation; TN; TP; water quality

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

Ryu, J.; Jang, W.S.; Kim, J.; Jung, Y.; Engel, B.A.; Lim, K.J. Development of Field Pollutant Load Estimation Module and Linkage of QUAL2E with Watershed-Scale L-THIA ACN Model. Water 2016, 8, 292.

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



[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top