울산만내의 2차원 분산현상에 관한 연구

Abstract

해양 오염 문제의 효과적인 대처방안은 오염물질의 분산현상을 규명함으로써 오염원에 의한 시간적, 공간적 농도분포를 예측하고 이들 오염원에 의한 피해가 없도록 관리하는 것이다. 울산만은 평균 대조차 48.2㎝의 조석과 태화강 유입수에 의한 해수유동이 발생하고 있어 이에따른 오염물질의 분산현상을 파악하여야 한다.

본 논문에서는 해수유동 현상은 Navier - Stokes 방정식을 유한차분 양해법으로 구한 Christopher G. Koutitas(1988)의 모델을 사용하였고, 여기서 계산된 해수유동 속도를 사용하여 수심방향으로 적분된 2차원 분산방정식을 2차의 삼각형요소를 사용한 유한요소법에 의해 해석하였다.

계산결과를 측정치와 비교 검정을 하지는 않았으나 하구만에서의 분산에 관한 정성적 현상을 파악하는데는 크게 유용하게 활용될 것으로 생각된다.

An effective counterplan of sea pollution problem is preestimating the concentration distribution depending on time and place through finding out the dispersion phenomena of pollutants, and managing not to be damaged by such pollutants.

There are 48.2 ㎝ of mean spring tide and outflow of Taewha river in Ulsan Bay, so the dispersion phenomena should be calculated according to these conditions.

In this paper the flow problem of sea area was calculated using the Christoper G. Koutitas finite difference model in solving Navier-Stokes equation, and using these velocity results the two dimensional dispersion equation which is integrated according to depth was calculated using the finite element method of quadratic triangular elements.

The calculated results was not verified comparing to observed data but this results should be very useful in practical dispersion problems qualitatively in the area of estuaries.

An effective counterplan of sea pollution problem is preestimating the concentration distribution depending on time and place through finding out the dispersion phenomena of pollutants, and managing not to be damaged by such pollutants.

There are 48.2 ㎝ of mean spring tide and outflow of Taewha river in Ulsan Bay, so the dispersion phenomena should be calculated according to these conditions.

In this paper the flow problem of sea area was calculated using the Christoper G. Koutitas finite difference model in solving Navier-Stokes equation, and using these velocity results the two dimensional dispersion equation which is integrated according to depth was calculated using the finite element method of quadratic triangular elements.

The calculated results was not verified comparing to observed data but this results should be very useful in practical dispersion problems qualitatively in the area of estuaries.