Applicability Test of STPS for HEC-RAS-based Turbidity Prediction Model in the Nagdonggang

Namjoo Lee; Seohye Choi; Chang-Sung Kim

doi:10.17820/eri.2021.8.4.245

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2021 Vol.8, Issue 4 Preview Page Next Page

Original Article

Applicability Test of STPS for HEC-RAS-based Turbidity Prediction Model in the Nagdonggang HEC-RAS에 기반한 탁도예측모형 STPS의 낙동강에 대한 적용성 검토

31 December 2021. pp. 245-252

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Abstract

A turbidity current in a river and a lake occurs due to diverse nutrient loading including suspended sediment in sediment runoff, which affects water withdrawal and river environments. We developed one dimensional time-variant numerical model based on Python for the Nagdonggang mainstream. We examined the numerical stability and the applicability of the model by performing the simulation of quasi-steady flow in non-flooding for three cases, which are different according to the point and the amount of turbidity inflows in the Nagdonggang upstream and a tributary. The result was reasonable in the respect of the conservation of matter. The model will facilitate to simulate a large river if we can secure the data of turbidity variations in a target river reach or measured points in a field.

Keywords

Advection dispersion model

Nagdonggang

Python

Turbidity

Water quality

하천이나 호소에서 발생하는 탁도 흐름은 유역유사유출 과정에서 부유사와 같이 다양한 영양물질이 혼합된 물질 순환의 결과물로 취수나 하천환경 등에 영향을 미치는 원인이 된다. 본 연구는 낙동강 본류를 대상으로 일차원 비정상(time-variant) 수치모형의 Python 코드를 개발하였다. 개발모형의 수치 안정성을 검토하였으며 모형의 적용성을 시험하기 위해 비홍수기의 준정상류 흐름에 대하여 낙동강 본류의 상류 탁도와 지류의 탁도 변화가 반영된 3가지 모의조건으로 적용하였다. 적용 결과, 각 모의 조건에 대해 물질 보존 관점에서 합리적인 수치해석 결과를 얻을 수 있었으며 향후 현장에서 실측된 지점 또는 하도 구간 내의 탁도 유동 자료을 확보할 수 있다면 대하천에 적용 가능한 탁도 간략 예측모형으로 활용할 수 있을 것이다.

키워드

이송확산모형

낙동강

Python

탁도

수질

References

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Information

Publisher :Korean Society of Ecology and Infrastructure Engineering
Publisher(Ko) :응용생태공학회
Journal Title :Ecology and Resilient Infrastructure
Journal Title(Ko) :응용생태공학회 논문집
Volume : 8
No :4
Pages :245-252
Received Date : 2021-11-24
Revised Date : 2021-12-03
Accepted Date : 2021-12-16
DOI :https://doi.org/10.17820/eri.2021.8.4.245

Ecology and Resilient Infrastructure ISSN:2288-8527(Online) 응용생태공학회 논문집

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