Watershed

Oral

379987 - Improving the accuracy of Chl-a simulation at high water temperature ranges in the HSPF model

Tuesday, June 5
10:30 AM - 12:00 PM
Location: Greenway IJ
Co-Authors: Jin Hwi Kim, Seoul, Korea – Dongguk University; Joo-Hyon Kang, Seoul, Korea – Dongguk University

1. Introduction and purpose
A watershed model such as the Hydrological Simulation Program – Fortran (HSPF) has been widely used to predict water quality and quantity for supporting watershed management actions. However, use of a washed model can be limited due to difficulty in calibration and/or intrinsic limitation of the model. In this study, the HSPF model was automatically calibrated for the flow rate and major water quality parameters including Chl-a. The original HSPF was modified to more accurately simulate Chl-a at higher temperature ranges, which could be more critical conditions for the algal bloom.
2. Methodology
The study area was the Sumgang watershed of South Han-river in Korea. The HSPF model was linked to the MATLAB, in which an optimization algorithm was implemented to calibrate the model parameters for flow, water temperature, sediment, nutrients and Chl-a. A series of sensitivity analysis were conducted to select parameters for calibration. To improve the accuracy of Chl-a simulation, the HSPF model was modified and tested.
3. Results
The HSPF model well simulated the flow, water temperature, and nitrogen but the simulation results of the sediment, phosphorus and Chl-a were less satisfactory. Particularly, the current HSPF model was limited in simulating rapid increase in the Chl-a concentration with the increased water temperature. The HSPF model was modified to simulate the nonlinearity between temperature and the maximum phytoplankton growth rate and the results showed better Chl-a simulation results.
4. Acknowledgement
This research was supported by a grant (2015R1D1A1A01056753) from the National Research Foundation of Korea.

Dong Hoon Lee, Ph.D

Research assistant
Dongguk University

PhD student
Dong hoon Lee
+82-10-9414-5570
Dept. of Civil and Environmental Engineering
Dongguk University-Seoul
Seoul, 100-715, Korea

My major field is nonpoint source control and watershed modeling.
My oral presentation title is as follows,
"Improving the accuracy of Chl-a simulation at high water temperature ranges in the HSPF model "
I would appreciate your participation in my presentation.

Presentation(s):

Send Email for Dong Hoon Lee


Assets

379987 - Improving the accuracy of Chl-a simulation at high water temperature ranges in the HSPF model



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Improving the accuracy of Chl-a simulation at high water temperature ranges in the HSPF model