- ENGLISH
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
Simulation of Daily Soil Moisture Content and Reconstruction of Drought Events from the Early 20th Century in Seoul, Korea, using a Hydrological Simulation Model, BROOK
Abstract
To understand day-to-day fluctuations in soil moisture content in Seoul, I simulated daily soil moisture content from 1908 to 2009 using long-term climatic precipitation and temperature data collected at the Surface Synoptic Meteorological Station in Seoul for the last 98 years with a hydrological simulation model, BROOK. The output data set from the BROOK model allowed me to examine day-to-day fluctuations and the severity and duration of droughts in the Seoul area. Although the soil moisture content is highly dependent on the occurrence of precipitation, the pattern of changes in daily soil moisture content was clearly quite different from that of precipitation. Generally, there were several phases in the dynamics of daily soil moisture content. The period from mid-May to late June can be categorized as the initial period of decreasing soil moisture content. With the initiation of the monsoon season in late June, soil moisture content sharply increases until mid-July. From the termination of the rainy season in mid-July, daily soil moisture content decreases again. Highly stochastic events of typhoons from late June to October bring large amount of rain to the Korean peninsula, culminating in late August, and increase the soil moisture content again from late August to early September. From early September until early October, another sharp decrease in soil moisture content was observed. The period from early October to mid-May of the next year can be categorized as a recharging period when soil moisture content shows an increasing trend. It is interesting to note that no statistically significant increase in mean annual soil moisture content in Seoul, Korea was observed over the last 98 years. By simulating daily soil moisture content, I was also able to reconstruct drought phenomena to understand the severity and duration of droughts in Seoul area. During the period from 1908 to 2009, droughts in the years 1913, 1979, 1939, and 2006 were categorized as ‘severe’ and those in 1988and 1982 were categorized as ‘extreme’. This information provides ecologists with further potential to interpret natural phenomenon, including tree growth and the decline of tree species in Korea.
- keywords
- BROOK model, daily soil moisture content, drought duration, drought severity, fluctuation of soil moisture content, hydrological simulation model, Seoul
참고문헌
Bormann FH, Likens GE. 1979. Pattern and process in a forested ecosystem. Springer-Verlag, New York, New York.
Choi Y. 2004. Trends on temperature and precipitation extreme events in Korea. J Korean Geograph Soc 39(5): 711-721.
Federer CA. 1980. Frequency of agricultural and forest drought in New Hampshire: 1926-1975. Research Report No. 26. Water Resource Research Center, University of New Hampshire, Durham, New Hampshire, USA.
Federer CA. 1992. BROOK90: a simulation model for evapotranspiration, soil water, and streamflow. USDA Forest Service, Northeastern Forest Experiment Station, Durham, New Hampshire. (an unpublished manual for the simulation model).
Federer CA, Lash D. 1978. BROOK: a hydrologic simulation model for eastern forests. Research Report No. 19. Water Resource Research Center, University of New Hampshire, Durham, New Hampshire.
Ha KJ, Ha E. 2006. Climatic change and interannual fluctuations in the long-term record of monthly precipitation for Seoul. Int J Climatol 26: 607-618.
Kim E. 1988. Radial growth patterns of tree species in relation to environmental factors. Unpublished Ph.D. Dissertation, Yale University, New Haven, Connecticut, USA.
Kim ES. 1993. Dynamics of climate and soil moisture content in forests of Seoul area. For Humanity 5: 47-62. Institute of Forest Science, Kookmin University, Seoul, Korea.
Kim ES. 2010. Statistical interpretation of climate change in Seoul, Korea, over the last 98 years. J Ecol Field Biol 33(1): 37-45.
Kim ES, Kim YS. 2000. Possibility of climate change and simulation of soil moisture content on Mt. Hallasan National Park, Chejudo Island, Korea. Korean J Ecol 23(2): 117-123.
Kim ES, Son Y, Park GS, Oh CH, Lee SH, Kim YS. 2009. Reforestation of degraded forests by Black Locust (Robinia pseudoacacia) and its impact on biodiversity and forest health in Korea, In: Proceedings of the 10th INTECOL International Congress of Ecology. International Association for Ecology (INTECOL). Brisbane, Australia, August 16-21, 2009.
Kimmins JP. 2004. Forest Ecology (Third ed.). Prentice Hall, Upper Saddle River, New Jersey.
Korea Meteorological Administration. 2008. Annual Climatological Report.
Lee DR. 2006. Drought: A dilemma in water supply and demand planning. Water & Future 39(3): 19-23. (written in Korean)
Lee SH. 2009. A study on the relationships between radial growth of black locust (Robinia pseudoacacia L.) and climatic factors on Mt. Namsan, Seoul, Korea. Unpublished MS Thesis, Kookmin University, Seoul, Korea. (written in Korean with an English Abstract)
Likens, GE, Bormann FH, Pierce RS, Eaton JS, Johnson NM. 1977. Biogeochemistry of a forested ecosystem. Springer- Verlag, New York, New York.
McMaster GS, Wilhelm WW. 1997. Growing degree-days: one equation, two interpretations. Agricultural and Forest Meteorology 87: 291-300.
Min SK, Kwon WT, Park EH, Choi Y. 2003. Spatial and temporal comparisons of droughts over Korea with East Asia. Int J Climatol 23: 223-233.
- 다운로드 수
- 조회수
- 0KCI 피인용수
- 0WOS 피인용수