• Title/Summary/Keyword: Daegwallyeong

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Flora and Vegetation of Hilly Pasture in Daegwallyeong (대관령 산지초지의 식물상 및 식생 특성)

  • Kim, Myung-Hyun;Eo, Jinu;Kwon, Soon-Ik;Song, Young-Ju
    • Korean Journal of Environmental Biology
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    • v.35 no.3
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    • pp.398-412
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    • 2017
  • The aim of this study was to collect the basic data for effective creation and management of hilly pasture. The investigation of flora and vegetation was conducted at 59 $relev\acute{e}s$ in hilly pasture of Daegwallyeong from 2014 to 2016. The vascular plants of the hilly pasture were 121 listed taxa which contain 38 families, 90 genera, 104 species, 13 varieties, and 12 subspecies. The biological type of the hilly pasture was determined as the $Th-D_4-R_5-e$ type. Twelve taxa were of naturalized plants composed of 5 families, 9 genera, 12 species. The urbanization index and the naturalized index were 3.7% and 9.9%, respectively. The vegetation types in the hilly pasture were classified into the following 3 communities: the Spiraea miyabei-Spiraea salicifolia community, the Persicaria thunbergii community, and the Agrostis alba-Phleum pratense community. The Agrostis alba-Phleum pratense community was classified into the following 5 subcommunities: the Poa pratensis subcommunity, the Artemisia princeps subcommunity, the Festuca ovina subcommunity, the Rumex acetosella subcommunity, and the typical subcommunity. Two factors (slope and EC) had the strongest impact on plant community distribution. Especially, the steep sloping sites (over $40^{\circ}$) did not play a crucial role in maintaining adequate pasture because of the invasion and establishment of shrubs.

The Study on Influence Factors of Snowfall Enhancement Used by Orographic Cloud Seeding in a Mountainous Area

  • Yang, Ha-Young;Ryu, Chan-Su
    • Journal of Integrative Natural Science
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    • v.7 no.3
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    • pp.214-218
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    • 2014
  • The main objective of this study is to analyse the influence factors of snowfall enhancement by glaciogenic seeding in a mountainous area. Twenty-five seeding experiments have been conducted during the period of February to April 2010. To use two rates seeding experiments (SR1: $1.04g\;min^{-1}$, SR2: $2.08g\;min^{-1}$) have been tested to get an appropriate ratio for snowfall enhancement at Daegwallyeong area. The conditions of seeding are able as followings: surface temperature <$0^{\circ}C$, wind speed <5 m/s, wind direction between 0 and $130^{\circ}$. The experiment results indicated that in the case of SR1 was more effective than SR2. The number of small ice particles below 1.0 mm was increased during seeding period measured by PARSIVEL disdrometer near generator. Most of snowfall enhancement by seeding was observed the inflow of the easterly wind blew in toward Gangwon regions from the East Sea and the supersaturated supercooled liquid water due to orographic effect.

On the Contrast of Aerosol Size Distribution and Cloud Condensation Nuclei Concentrations between the East and the West of the Korean Peninsula (대관령과 영종도에서 측정한 에어러솔 크기분포 및 CCN 수농도에 관한 연구)

  • Kim, Jong Hwan;Park, Min-Su;Shim, Sungbo;Yum, Seong Soo
    • Atmosphere
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    • v.22 no.1
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    • pp.87-96
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    • 2012
  • Aerosol number concentration ($N_{CN}$), size distribution and cloud condensation nuclei (CCN) concentration ($N_{CCN}$) were measured during 16-21 August 2008 at Daegwallyeong (DG) located in the eastern rural region of the Korean Peninsula. In the very next week (22-29 August 2008) the same aerosol properties were measured at Yeongjong Island (YJ) in the Yellow Sea. $N_{CN}$ for all 3 size cuts (above 3, 6 and 10 nm) was significantly higher at DG than YJ, but $N_{CCN}$ was significantly lower at the former and resulted in the $N_{CCN}/N_{CN}$ ratio more than twice higher at YJ ($0.94{\pm}0.09$ vs. $0.35{\pm}0.15$ at 0.53% supersaturation). The geometric mean diameter at DG, $53{\pm}15nm$, was much smaller than that at YJ, $91{\pm}6nm$, due to the particle formation events that were likely to have occurred continuously at DG. For given mean diameter, aerosols were more likely to act as CCN at YG compared to those at DG.

A Qualitative Analysis of WRF Simulation Results of Typhoon 'Rusa' Case (태풍 루사와 관련된 WRF의 수치모의 결과 분석)

  • Kim, Jin-Won;Lee, Jae Gyoo
    • Atmosphere
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    • v.17 no.4
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    • pp.393-405
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    • 2007
  • Simulation results of WRF for the case of typhoon 'Rusa' were analyzed, comparing with observed data especially forjavascript:confirm_mark('abe', '1'); the Gangneung area around to examine its ability in numerical simulation. From the hourly precipitation time series, two peaks were found at Gangneung and Daegwallyeong, while only one peak was found from those of inland regions else. Especially, for the Yeongdong region, the first peak was directly related to spiral bands generated in front of the typhoon. Convective cells that were developed within the spiral bands moved to the eastern coastal area from the sea so that local heavy rainfall occurred in the Yeongdong region. The second peak was mainly related to the accompanying rain band of typhoon itself, topographic effect and the convergence near Gangneung area. Precipitation in Gangneung was simulated as much as about 30% of observed one. The main reason of this result came from a poor representation of wind directions in Gangneung area of WRF model. Observed wind direction was northwesterly but simulated one was nearly easterly in the area. This might shift a local heavy rainfall area downstream to the mountain area rather than the coastal area.

Cloud Physics Observation System (CPOS) and Validation of Its Products (구름물리 관측시스템 및 산출물 검정)

  • Chang, Ki-Ho;Oh, Sung-Nam;Jeong, Ki-Deok;Yang, Ha-Young;Lee, Myoung-Joo;Jeong, Jin-Yim;Cho, Yohan;Kim, Hyo-Kyung;Park, Gyun-Myeong;Yum, Seong-Soo;Cha, Joo-Wan
    • Atmosphere
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    • v.17 no.1
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    • pp.101-108
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    • 2007
  • To observe and analyze the cloud and fog characteristics, the METeorological Research Institute (METRI) has established the Cloud Physics Observation System (CPOS) by implementing the cloud observation instruments: Forward Scattering Spectrometer Probe (FSSP), PARticle SIze and VELocity (PARSIVEL), Microwave Radiometer (MWR), Micro Rain Radar (MRR), and 3D-AWS at the Daegwallyeong Enhanced Mountain Weather Observation Center. The cloud-related products of CPOS and the validation status for the size distribution of FSSP, the precipitable water of MWR, and the rainfall rate of MRR and PARSIVEL are described.

A Model for Predicting the Effect of Increasing Air Temperature on the Net Photosynthetic Rate of Quercus mongolica Stands

  • Ihm, Byung-Sun;Lee, Jeom-Sook;Kim, Jong-Wook;Kim, Joon-Ho
    • Journal of Ecology and Environment
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    • v.30 no.1
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    • pp.1-7
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    • 2007
  • A model was developed to predict the effects of rising air temperature on net photosynthetic rate of Quercus mongolica stands at Mt. Paekcheok-san, Kangwon-do in South Korea. The PFD (Photon flux density) and air temperature were determined from weather data from the research site and the Daegwallyeong meteorological station and gas exchange or release responses of each tree component were measured. Using these data, we simulated the effects of increases in mean annual air temperatures above current conditions on annual $CO_2$ budget of Q. mongolica stands. If mean annual air temperature is increased by 0.5, 1.0, 1.5, 2.0, 2.5 or $3.0^{\circ}C$, annual net photosynthetic rate will be increased by 8.8, 12.8, 14.5, 12.6, 9.2 and 1.0 ton $CO_2\;ha^{-1}yr^{-1}$ respectively. Simulations indicate that changes in air temperature will have a major impact on gas exchange and release in Q. mongolica stands, resulting in a net increase in the rate of carbon fixation by standing crops.

Effect of Forest Therapy Program on Stress and Physical Health Promotion of Forest Fire Victims (산림치유프로그램이 산불피해지역주민의 스트레스와 신체적 건강증진에 미치는 영향)

  • Kim, Jin-Sook;Kim, Myeong-Jong;Min, Ji-seon;Hwang, Seong-ug;Yu, Ji-hoon;Jeon, Yeong-soon
    • Journal of Environmental Science International
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    • v.29 no.9
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    • pp.915-924
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    • 2020
  • The purpose of this study was to conduct a forest healing program for victims affected by the large forest fires of 2017 in Gangneung and to investigate its effects on the stress and physical health promotion of the victims. From January to March 2019, three forest therapy programs were conducted on 49 residents of four villages that suffered forest fires in the National Center for Forest Therapy, Daegwallyeong. The results showed that the degree of stress of forest fire victims decreased significantly by means of these programs. Furthermore, autonomic nerve activity, stress resistance, stress index, and fatigue decreased significantly and average heart rate and heart stability also improved.

Vascular Plants of 4 Sections in Gangwon-do, Baekdudaegan Mountains - Focused on Mt. Odaesan section, Daegwallyeong~Mt. Seokbyeongsan section, Mt. Cheongoksan~Mt. Deokhangsan section and Geumdaebong~Mt. Taebaeksan section - (백두대간 강원도 4개 권역의 관속식물상 - 오대산, 대관령~석병산, 청옥산~덕항산, 금대봉~태백산 권역을 중심으로-)

  • Oh, Hyun-Kyung;You, Ju-Han
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.21 no.4
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    • pp.43-63
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    • 2018
  • The purpose of this study is to investigate and analyze the vascular plants in the Baekdudaegan Mountains and to provide the basic data necessary for future ecosystem conservation measures. The numbers of vascular plants were summarized as 699 taxa including 98 families, 338 genera, 598 species, 4 subspecies, 80 varieties, and 17 forms. There were 427 taxa in A-section, 451 taxa in B-section, 361 taxa in C-section, and 455 taxa in D-section. The rare plants were 37 taxa including 2 taxa of the CR, EN, and DD each, 12 taxa of the VU, and 19 taxa of the LC. The Korean endemic plants were 30 taxa including Salix koriyanagi Kimura, Hanabusaya asiatica (Nakai) Nakai, Carex okamotoi Ohwi, and so forth. The northern plants were 41 taxa including Equisetum hyemale L., Anemone reflexa Steph. et Willd., Symplocarpus renifolius Schott ex Miq., and so forth. The naturalized plants were 33 taxa including Fallopia dumetorum (L.) Holub, Coreopsis lanceolata L., Poa pratensis L., and so forth. The invasive alien plants were 3 taxa including Rumex acetocella L., Ambrosia artemisiifolia L., and Aster pilosus Willd.

Soil Erosion Reduction Plan for Watershed with Sloping Fields of Highland Agriculture by Using GEOWEPP Model (GEOWEPP 모형을 이용한 고랭지 경사지밭 소유역의 토양유실 저감방안)

  • Moon, Jong-Pil;Kim, Tai-Cheol;Lee, Sung-Hyoun;Kwon, Jin-Kyung;Lee, Su-Jang;Lim, Kyoung-Jae
    • Journal of The Korean Society of Agricultural Engineers
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    • v.52 no.6
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    • pp.135-144
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    • 2010
  • This study was performed to suggest a soil loss reduction skill through estimating soil erosion from a small watershed including each type of sloping agriland by using GEOWEPP model. Experimental watershed at Gangwon province was selected for very typical sloping fields of highland agriculture in Alpine area. Runoff discharge and sediment load, hourly rainfall amount occurred during storm event were gauged, and weather data were obtained from Daegwallyeong meteorological station. The results of GEOWEPP model estimation showed that relative error values for total runoff discharge and sediment load were 3 %, -14.5 % respectively. Based on the result, soil erosion and waterway path map for each hillslope were made to select target hillslope. Several hillslopes of severe soil erosion were analyezed and then the optimal vegetative filter strip construction width and waterway path to plant grass were decided by using GEOWEPP Model.

Analysis of Preference and Psychological Recovery by Sound, Scenery, Soundscape in Healing Forest (치유의숲 소리, 경관, 소리경관(soundscape)에 따른 선호도 및 심리적 회복감 분석)

  • Kim, Jin-Sook;Shin, Won-Seob;Kim, Myeong-Jong
    • Journal of Environmental Science International
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    • v.30 no.3
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    • pp.267-277
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    • 2021
  • This study investigates sound, scenery, and soundscape preferences, which are sensory factors that users feel in a healing forest, comparing the difference in recovery by the soundscape. In the barrier-free, wooden walking path of the National Daegwallyeong Healing Forest, a survey site with five different conditions was selected. Users prefer water sounds the most and places with open views for scenery. For the complex sensation of soundscapes, the most preferred is a space where water sounds can be heard, and either a waterfall or an open view can be seen. A profile of mood states test was use to compare users' psychological recovery by the soundscape. It was found that users felt the most positive mood with water sounds and open views. In addition, users' preference for artificial sounds, scenery, and soundscape was the lowest. In the mood state test, it was found that the artificial soundscape incited the most negative emotions.