Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Numerical Study on the Changes in Microscopic Meteorological Elements due to Land Use Variations in the Nakdong River Basin

낙동강 하천 토지이용 변화에 따른 미세규모 기상 요소의 변동에 관한 수치 연구

  • Kim, Eun-Ji (Department of Earth Science, Pusan National University) ;
  • Lee, Soon-Hwan (Department of Earth Science Education, Pusan National University)
  • 김은지 (부산대학교 지구과학과) ;
  • 이순환 (부산대학교 지구과학교육과)
  • Received : 2016.07.05
  • Accepted : 2016.12.08
  • Published : 2016.12.31
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Abstract

A numerical assessment using mesoscale-CFD (computational fluid dynamics) coupled A2C (atmosphere to CFD) model was carried out to analyze the variation of microscopic air flow pattern due to the construction of the Chilgok barrage in the Nakdong River. Scenarios with air flow patterns were classified into pre- and post-construction. The increased width of the river due to the construction of the Chilgok barrage induced obvious changes in moisture and the thermal environment around the river. However, air temperature variation was restricted within an area along the windward side in the numerical assessment. The impact of barrage construction on air temperature tends to be stronger during the nighttime than the daytime. It also stronger during the winter than the summer. In the simulation, the convergence of mesoscale wind is more pronounced after barrage construction than before. This is caused by the change of heat flux pattern induced by the widening of the river. Although this work is a case study with restricted atmospheric stability conditions that has several limitations in the numerical simulations, the impacts of the land-use changes brought about by the construction of the barrage in the river acceptable.

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References

  1. Do, W. G., Jung, W. S., 2012, An analysis on the variation trend of urban heat island in Busan area(2006-2010), J. Environ. Sci., 21(8), 953-963.
  2. Jeon, B. I., Kim, I. G., Lee, Y. M., 2002, A change of local meteorological environment according to dam construction of Nakdong-River: . Meteorological data analysis before and after dam construction, J. Environ. Sci., 11(3), 161-168.
  3. Kawamura, K., 1977, Spatial distribution of urban climate, Meteorol. Res. Note, 133, 26-47.
  4. Kim, H. D., Cho, C. B., Seo, K. S., 2016, Micrometeorological characteristics during the steam fog over the Gumi reservoir of Nakdong river, J. Environ. Sci., 25(3), 405-415.
  5. Kim, K. R., Kwon, T. H., Kim, Y. H., Koo, H. J., Choi, B. C., Choi, C. Y., 2009, Restoration of an inner-city stream and its impact on air temperature and humidity based on long-term monitoring data, Adv. Atmos. Sci., 26(2), 283-292. https://doi.org/10.1007/s00376-009-0283-x
  6. Kim, S. B., Um, H. H., Kwon, B. H., Oh, S. N., Kim, Y. H., 2004, Examination of heat budget model for urban thermal environment evaluation, Asia-Pacific J. Atmo. Sci., 40(2), 147-158.
  7. Kimura, F., Takahashi, S., 1991, The effects of land-use and anthropogenic heating on the surface temperature in the Tokyo metropolitan area : A numerical experiment, Atmos. Environ., 25B, 155-164.
  8. Koo, H. S., Kim, H. D., Yun, W. T., Lee, S. H., 2010, Variation of regional circulations due to long-term change of land use in the Daegu metropolitan region for 100 years, Asia-Pacific J. Atmos. Sci., 46(1), 53-64. https://doi.org/10.1007/s13143-010-0006-3
  9. Lee, C. B., 1981, Changes of fog days and cloud amount by artificial lakes in Chuncheon, J. Korean Meteorol. Soc., 17, 18-26.
  10. Lee, H. W., Lee, K. O., Baek, S. J., Kim, D. H., 2005, Analysis of meteorological features and prediction probability associated with the fog occurrence at Chun-cheon, J. Korean Soc. Atmos. Environ., 21(3), 303-313.
  11. Lee, J. B., Bong, J. H., Jo, H. N., 1990, Aspects of local climatic change due to dam construction, J. Atmos. Res., 7, 75-81.
  12. Lee, S. H., Kim, H. D., 2008, Effects of regional warming due to urbanization on daytime local circulations in a complex basin of the Daegu metropolitan area, Korea, J. Appli. Meteorol., 47, 1427-1441. https://doi.org/10.1175/JAMC1504.1
  13. Lee, S. H., Kim, H. D., 2010, Modification of nocturnal drainage flow due to urban surface heat flux, Asia-Pacific J. Atmos. Sci., 46, 53-465. https://doi.org/10.1007/s13143-010-0006-3
  14. Mango, L. M., Melesse, A. M., McClain, M. E., Gann, D., Setegn, S. G., 2011, Land use and climate change impacts on the hydrology of the upper Mara river basin, Kenya: Results of a modeling study to support better resource management, Hydrol. Earth Syst. Sci., 15, 2245-2258. https://doi.org/10.5194/hess-15-2245-2011
  15. Mitchell, J. M., 1961, The temperature of cities, Wetherwise, 14, 224-229. https://doi.org/10.1080/00431672.1961.9930028
  16. National Meteorological Research Institute, 2014, Developing research for the impact assessment technologies of local meteorology.
  17. Oh, S. M., Hwang, J. M., Yoon, T. M., Jung, J. H., Kwon, S. T., 1995, Changes of fog occurrence and climatic factors caused by dam construction in the neighborhood of Andong, Institute of agricultural science and technology Andong National University, 2, 23-35.
  18. Oke, T. R., 1973, City size and the urban heat island, Atmos. Environ., 7, 769-779. https://doi.org/10.1016/0004-6981(73)90140-6
  19. Scire, J. S., Robe, F. R., Fermau, M. E., Yamartino, R. J., 2000, A user's guide for the CALMET meteorological model (Ver. 5), Earth Tech., Miami, USA.
  20. Un, J., Son, K. I., Kim, M. M., 2009, Numerical analysis for bed changes in the upstream channel due to the installation of sediment release openings in the flood control dam, J. Korea Water Resour. Assoc., 42(4), 319-329. https://doi.org/10.3741/JKWRA.2009.42.4.319
  21. Wang, S., Kang, S., Zhang, L., Li, F., 2008, Modelling hydrological response to different land-use and climate change scenarios in the Zamu river basin of northwest China, Hydrol. Process., 22, 2502-2510. https://doi.org/10.1002/hyp.6846
  22. Yamada, T., 2011, Downscaling mesoscale meteorological models for computational wind engineering applications, J. Wind Eng. Ind. Aerodyn., 99(4), 199-216. https://doi.org/10.1016/j.jweia.2011.01.024
  23. Yamada, T., Bunker, S., 1988, Development of a nested grid, second moment turbulence closure model and application to the 1982 ASCOT bruch creek data simulation, J. Appl. Meteorol., 27, 562-578. https://doi.org/10.1175/1520-0450(1988)027<0562:DOANGS>2.0.CO;2
  24. Yasushi, S., 1994, Heat island intensity in Koshigaya - A case study of the rural with the paddy field, Tenki, 41(9), 515-523.