Next Article in Journal
Spectrophotometric Detection of Glyphosate in Water by Complex Formation between Bis 5-Phenyldipyrrinate of Nickel (II) and Glyphosate
Next Article in Special Issue
Hydrological Modelling and Water Resources Assessment of Chongwe River Catchment using WEAP Model
Previous Article in Journal
Decision Support Concept to Selection of Wastewater Treatment Plant Location—the Case Study of Town of Kutina, Croatia
Previous Article in Special Issue
An Ensemble Decomposition-Based Artificial Intelligence Approach for Daily Streamflow Prediction
Article Menu

Export Article

Open AccessArticle
Water 2019, 11(4), 718; https://doi.org/10.3390/w11040718

Evaluation of the Effect of Channel Geometry on Streamflow and Water Quality Modeling and Modification of Channel Geometry Module in SWAT: A Case Study of the Andong Dam Watershed

1
Department of Regional Infrastructure Engineering, Kangwon National University, Gangwon-do, Chuncheon-si 200-701, Korea
2
Department of Environmental Engineering, Chungbuk National University, Chungdae-ro 1, Chungbuk-do, Cheongju-si 28644, Korea
3
Department of Civil and Environmental engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
4
Han River Environment Research Center, 42, Dumulmeori-gil, 68 beon-gil, Yangseo-myeon, Yangpyeong-gun, Gyeonggi-do 12585, Korea
5
Agriculture and Life Sciences Research Institute, Kangwon National University, Gangwon-do, Chuncheon-si 200-701, Korea
*
Author to whom correspondence should be addressed.
Received: 25 March 2019 / Revised: 3 April 2019 / Accepted: 4 April 2019 / Published: 6 April 2019
(This article belongs to the Special Issue Hydrologic Modelling for Water Resources and River Basin Management)
  |  
PDF [3358 KB, uploaded 22 April 2019]
  |  

Abstract

The impact of the channel geometry on water quantity and quality simulation of the Soil and Water Assessment Tool (SWAT) was evaluated for the Andong Dam watershed. The new equations to determine the bankfull width of the channels and the bottom width of the floodplains were developed using aerial photographs, and its performance was compared with the current equations of SWAT. The new equations were more exact than the current equations since the current equations tended to overestimate the widths of the channel and floodplain. When compared with the observed data, the streamflow of the scenario 2 (S2, applying the new equations) showed lower deviation and higher accuracy than scenario 1 (S1, applying the current equations) because the peak flow of S2 captured the observed data better due to the impact of the change geometry. Moreover, the water quality results of S2 outperformed S1 regarding suspended solid, total nitrogen, and dissolved oxygen. This is attributed to the variables, such as flow travel time, which is directly related to the channel geometry. Additionally, SWAT was modified to consider the various channel cross-sectional shapes. The results of this study suggest that the channel geometry information for the water quantity and quality estimation should be carefully applied, which could improve the model performance regarding streamflow and water quality simulations. View Full-Text
Keywords: channel geometry; SWAT; hydrological modeling; regression equation; water quality modeling; Andong Dam Watershed; aerial photographs channel geometry; SWAT; hydrological modeling; regression equation; water quality modeling; Andong Dam Watershed; aerial photographs
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

Share & Cite This Article

MDPI and ACS Style

Han, J.; Lee, D.; Lee, S.; Chung, S.-W.; Kim, S.J.; Park, M.; Lim, K.J.; Kim, J. Evaluation of the Effect of Channel Geometry on Streamflow and Water Quality Modeling and Modification of Channel Geometry Module in SWAT: A Case Study of the Andong Dam Watershed. Water 2019, 11, 718.

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