• Journal of The Geomorphological Association of Korea
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• v.17 no.2
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• pp.1-13
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• 2010

The technique of mountain ordering developed by Yamada(1999) has been tested to two small islands (Namhaedo: 301km², Geojedo: 378km²). The results and experiences above were extended and applied to the whole area of the southern part of Korean Peninsula. Three areas such as Seorak-Taebaek Mountains, Jiri-Deogyu Mountains, and Youngnam Alps are identified as the highest, 5th order mountains. 10 areas are classified as the 4th order and 87 areas as the 3rd order. It is suggested that the 5th order mountains are related to the axis of uplift and the 4th and 3rd order mountains have the same direction (NE-SW) as that of the secondary mountain systems in the Korean Peninsula. The logarithmic values of number, area, and relative altitude of the ordered mountains have the linear relationship with the order, as the laws of stream order. The several mountains which are not included in the existing mountain systems could be identified among the ordered mountains, and those mountains could be used as the basis to understand the geological structure of the Korean Peninsula. Most of the National Parks and the Provincial Parks are distributed on the 3rd, 4th, 5th order mountains. It is especially confirmed that the Songnisan National Park take a role to link the Seorak-Taebaek Mountains and Jiri-Deogyu Mountains as a important ecological axis. Therefore, it would be validated that the technique of mountain ordering has the practical values as well as the geomorphological significances.

• Korean Journal of Environmental Biology
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• v.40 no.4
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• pp.615-630
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• 2022

This study was conducted to investigate the flora of Mt. Seongdeok (Ganghwa-gun) in Korea. From the results of nine field surveys from March 2020 to July 2022, a total of 445 total taxa, representing 397 species, nine subspecies, 35 varieties, two forms and two hybrids were identified, which were placed in 273 genera and 93 families. The plant formation of Mt. Seongdeok is a deciduous broad-leaved and conifer mixed forest, which is common in the middle part of the Korean Peninsula. Most of the mountain is covered by a young secondary forest, which is mainly composed of Quercus ssp. and Pinus ssp. Among them, five taxa were endemic to Korea, one taxon were endangered plant and two taxa were red list plants. The floristic target plants amounted to 27 taxa, specifically one taxon of grade V, four taxa of grade III, seven taxa of grade II, and 15 taxa of grade I. And 43 taxa were northern lineage plants. A total of 46 species of alien plants were identified, with a Naturalized Index of 10.3%, an Urbanization Index of 11.7%, and six plants that disturbed the ecosystem. Our results provide basic data on vascular plants flora, and plant diversity and distributional changes.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.3C
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• pp.187-196
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• 2008

An earthquake of magnitude 5.0 occurred at Ssang-gye-sa, a Buddhist temple in Jirisan, located near the southern border of the Korean peninsula on 4 July 1936. It resulted in severe damage of several buildings and structures in Ssang-gye-sa. Particularly, the top component of a five-story stone pagoda in the temple was tipped over and fell down during the earthquake. This earthquake damage case would be usefully applied to estimating the intensity of ground motion in the Korean peninsula, a moderate seismicity region, where strong motion has never been recorded with the exception of historic seismic events. In order to estimate the local site effects and the corresponding ground motion at Ssang-gye-sa site, intensive site investigations including borehole drilling and in-situ seismic tests such as crosshole and SASW tests were performed in the temple area. Based on the site characteristics, site-specific seismic response analyses using various input motions were conducted for a representative Ssang-gye-sa site by means of both one-dimensional equivalent-linear and nonlinear methods with six input rock outcrop acceleration levels ranging from 0.044g to 0.220g. The resultant site-specific seismic responses indicated the amplified ground motions in the short-period range near the site period of Ssang-gye-sa. Furthermore, the intensity on rock outcrop of the 1936 Jirisan earthquake was estimated by making a comparison between the site responses analysis results in this study and the full-scaled seismic test of pagoda model in the prior study.

• Korean Journal of Remote Sensing
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• v.28 no.5
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• pp.521-529
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• 2012

The evapotranspiration (ET) is one of the most important factor in the hydrological cycle. In this study, remote sensing based ET algorithm using Moderate Resolution Imaging Spectroradiometer (MODIS) was considered. Then, Priestley-Taylor algorithm was used for estimation of potential evapotranspiration in South Korea, and its spatial distribution was analyzed. Overall applicability between estimated potential evapotranspiration and weather station pan evaporation in Nakdong river basin was represented. The results using small pan showed that correlation coefficient in Pohang and Moonkyung Station was 0.70 and 0.55, respectively. However, the results using large pan showed correlation coefficient in Pohang and Moonkyung Station was 0.62 and 0.52, respectively.

• Korean Journal of Environmental Biology
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• v.24 no.2 s.62
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• pp.95-101
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• 2006

The present paper attempts to elucidate the taxonomic status of five species of Takydromus (T. amurensis, T. wolteri, T. tachydromoides oldi, T. kwagakunesis and T. auroralis) reported in Korean Peninsula to date. For this purpose 114 Takydromus specimens were collected from April 2003 to october 2004 in Southern Korean peninsula and morphological characters inclusive of the presence of contact between front-nasal and fostral and the number of femoral pores have been analyzed. The analysis reveals that T. kwagakunesis and T. auroralis should be synonymized to T. amurensis. In addition, the Korean Takydromus consists of two species of T. amurensis and T. wolteri.

• Korean Journal of Medicinal Crop Science
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• v.16 no.5
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• pp.337-340
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• 2008

This study was conducted to compare the contents of fatty acids and phytosterols in Glehnia littoralis according to habitat areas. In leaves of G. littoralis collected from Yeong-deok, fatty acids contents was higher than that of the other aeras, while there was no difference in contents of roots and seeds according to habitat areas. Average phytosterols contents of 10 habitat areas were $3.8{\mu}g\;g^{-1}$ (campestreol) $16.8{\mu}g\;g^{-1}$ (stigmasterol) and $3.7{\mu}g\;g^{-1}$ ($\beta$-sitosterol), respectively. G. littoralis collected from Uljin showed the highest phytosterols contents than that of the other aeras.

• Korean Journal of Plant Resources
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• v.16 no.1
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• pp.61-73
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• 2003

External and anatomical characters such as stem, leaf, ovary, calyx lobe, ultrastructure of stigma epidermis of leaf blade and midvein, corolla lobe, seed coat and pollen were examined on Pterygocalyx volubilis and Tripterospermum japonicum of Korean Gentianaceae. Fruit characters(capsule and berry), absent or not of corona and pollen characters(reticulate and striate) has been used by identification characters of two taxa. But study results, external characters(root, leaf, calyx lobe, stigma, anther), internal characters(calyx love, ovary) and ultrastructure characters(epidermis o leaf blade and midvein, corolla lobe, seed coat) were useful for species identification. Taxonomic relationships among problematic taxa were discussed.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.408-408
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• 2011

수자원관리와 수문모형에 있어 강수, 증발산, 침투, 침루 등의 물 순환과정에 대한 실질적인 이해와 분석연구의 중요도가 높아지고 있는 실정이며, 그중에서도 토양수분은 강수의 침투, 유출 등의 지표면과 대기사이의 질량 및 에너지이동에 관여하는 중요한 요소로서 수자원 및 수문현상에 직접적인 영향을 미친다. 이를 위해 강수, 증발산, 토양수분과 같은 수문변수에 대한 다양한 관측이 실시되어야 하지만 국내에서는 지속적이고 안정적으로 지상관측을 할 수 없는 실정이며 관련 기반기술도 매우 취약하다. 따라서 이를 극복하기 위해서는 위성영상자료를 이용함으로써 한반도 전체에 대한 광역적인 토양수분자료의 획득을 용이하게 한다. 본 연구의 연구유역은 수자원 연구를 위해서 지정된 용담댐 시험유역으로 하였으며, 토양수분 관측지점의 지상관측 수문자료인 각 지점별 강수량, 지면온도, 인공위성자료인 MODIS 정규식생지수 등의 가용자료를 수집하고 신경망모형을 활용한 토양수분자료 생산 모형을 개발하여, 개선된 시공간 분해능과 공간정보 대표성을 가진 광역 토양수분자료를 생산하고 적용타당성을 분석하였다. 산정된 토양수분모형의 적용가능성을 파악하고자 용담댐 유역의 각 지점별 토양수분 관측데이터와 추정데이터를 비교한 결과 추천, 부귀, 상정 지점의 경우 평균 약 0.9257의 상관계수와 약 1.2917의 평균제곱근오차를 보였고, 검증지점인 천천2의 경우 약 0.8982의 상관계수와 약 5.1361의 평균제곱근오차의 결과를 보여주었으며 토양수분 추정모형의 적용가능성이 높음을 확인할 수 있었다.

• Korean Journal of Plant Taxonomy
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• v.45 no.4
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• pp.380-390
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• 2015

The morphological characters were observed in six taxa in the genus Dioscorea of Korea (D. polystachya, D. japonica, D. nipponica, D. quinqueloba, D. tenuipes, and D. dokoro). The underground structure and the formation of bulbil were useful characters for separating sect. Enanatiophyllum from sect. Stenophora. The important characters for discriminating taxonomic entities were as follows: the position of the anther and the shape of the pistil in the microstructural characters, including the protuberance of the base of the petiole, the shape and color of the flower, the shape of the fruit, and the shape of the seed wing. Based on the results, a key to Korean Dioscorea is provided and the distribution of these species in Korea is described.

• Korean Journal of Plant Taxonomy
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• v.41 no.2
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• pp.138-143
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• 2011

Based on specimens examined, a distribution map of Trachelospermum asiaticum in Korea is provided. The species is distributed on Jeju Island and over the southern and western coastal areas in Korea. The northern limit of distribution is the Deokjeok Islands of Incheon. The distributional range of this species is consistent with that of the Jeju and South coastal floristic subregions of Korea. On the other hand, we investigated the anatomical characteristics of root, stem, leaf and ovary, in addition to the ultrastructure of pollen grains and leaf surfaces of the species, as these have been scarcely examined.