• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.180-180
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• 2021

가로수는 「도로법」 제11조에 따른 도로(고속국도를 제외한다)와 보행자전용도로 및 자전거전용도로 등 대통령령으로 정하는 도로의 도로구역 안 또는 그 주변지역에 심는 수목을 말하며, 도시의 가로수는 기후조절효과 및 대기오염 정화효과 등을 가질 뿐 아니라 도심지 내에 녹색을 도입하고 도시경관을 구성하는 주요 요소이다. 전국 각 시도에서는 가로수 조성사업을 지속적으로 추진하고 있다. 하지만 몇몇 도시에서는 적절하지 않은 가로수 관리로 인해 가로수가 말라죽는 현상이 증가하고 있다. 이에 가로수 고사 현상을 감소시키기 위하여 토양수분과 토양온도를 측정하여 가로수 피해와 연관성을 조사할 필요성이 있다고 판단하였다. 본 연구는 춘천시에서 진행하였으며, 일반 가로수와 현재 가로수 고사로 문제가 되고 있는 3 모니터링 지점을 선정하고, 토양수분 센서를 5, 15, 40 cm 깊이에 설치하였다. 센서를 이용하여 토양수분과 지온, EC 모니터링을 실시하였다. 토양수분 모니터링 자료를 활용하여 토층별 토양수분 소비량 산정을 하고, 현장 토양시료를 채취하여 물리·화학적 특성을 분석하였다. 또한 가로수 증발산량 산정 및 토층별 토양수분 소비량과 소비패턴을 비교하였다. 본 연구 결과를 향후 RZWQM(Root Zone Water Quality Model) 모델의 기초자료 및 시나리오 구성에 활용될 수 있으며, 모니터링 및 모델링 결과를 활용하여 가로수 및 도시 표토 기능 위협 요인을 분석에 활용 될 수 있다.

• Korean Journal of Environmental Agriculture
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• v.29 no.2
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• pp.93-101
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• 2010

For the study of possibility of practical use as an organic farm materials of the mixtures with lignite and amino acid solution, this experiment was carried out to investigate the effects of the mixtures on the growth and the yield of rice plant, chinese cabbage, and red pepper, and the effects of the mixtures on chemical properties of soil. Also, when the mixtures of the lignite plus amino acid solution and the chemical fertilizer were applied to these three crop cultivation area, authors want to know how can the loss in quantity of chemical fertilizer affects the growth and the yield of these crops. As the results, growth of rice plant applied with the mixtures of lignite and amino acid solution was better than that applied with the recommended rate of chemical fertilizer. Especially, the growth of rice plant appeared to be good at the treatment of 150 kg/ha of the mixed lignite with amino acid solution and at that of its mixtures and standard fertilization. Growth of chinese cabbage and red pepper was good at the application of 600 kg/ha of the mixed lignite with amino acid solution and at that of its mixtures and standard fertilization. Yield of rice and chinese cabbage was good at the treatment of 150 kg/ha of the mixed lignite with amino acid solution and at that of its mixtures and standard fertilization, and yield of red pepper was good at the application of 600 kg/ha of the mixed lignite with amino acid solution and at that of its mixtures and standard fertilization. The organic matter content increased and while the exchangeable cation decreased when the lignite mixed with amino acid solution and the loss in quantity of chemical fertilizer applied at paddy field. Incase of these treatments, pH and available phosphorus increase at upland field, but did not change at paddy field.

• The Journal of Engineering Geology
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• v.33 no.1
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• pp.69-83
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• 2023

Forest fires increase the risk of subsequent soil erosion and mass movement in burned areas, even under rainfall conditions below landslide alert thresholds, by destroying plants and vegetation and causing changes to soil properties. These effects of forest fires can alter runoff in burned areas by altering soil composition, component minerals, soil water repellency, soil mass stability, and soil fabric. Heat from forest fires not only burns shallow organic matter and plants but also spreads below the surface, affecting soil constituents including minerals. This study analyzed X-ray diffraction and physical properties of topsoil and subsoil obtained from both burned and non-burned areas to identify the composition and distribution of clay minerals in the soil. Small amounts of mullite, analcite, and hematite were identified in burned soils. Vermiculite and mixed-layer illite/vermiculite (I/V) were found in topsoil samples from burned areas but not in those from non-burned areas. These findings show changes in soil mineral composition caused by forest fires. Expansive clay minerals increase the volume of soil during rainfall, degrading the structural stability of slopes. Clay minerals generated in soil in burned areas are therefore likely to affect the long-term stability of slopes in mountainous areas.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2001.09a
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• pp.249-253
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• 2001

퇴적물에 오염된 중금속의 지화학적 특성을 규명하고자, 연속추출방법을 이용하여 구성광물 과의 지구화학적 수반관계와 산성화에 따른 중금속 용출특성을 연구하였다. 용출실험과 연속추출 실험을 종합한 연구결과, 서울시 도로변의 하수퇴적물이 산성비와 같은 요인에 의해 pH 5.0정도의 약산성환경과 접촉하였을 때 중금속의 상대적인 용출특성은 Zn>>Cd$\geq$Co>Ni>Cu$\geq$Pb>Cr이며, 원소별 용출량은 Zn 40-90%, Cd 10-30%, Co 15-25%, Ni 5-25%, Cu 0-20%, Pb 0% 및 Cr 0% 이었다. 하수퇴적물에 오염된 Zn, Cd, Cu 및 Ni의 용출은 매우 우려할 만한 수준이며, 수계의 물리화학적 변화(pH 등)에 따라 이들 원소의 일부분이 용해되어 지표수 및 강물을 오염시킬 것으로 예상된다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2001.04a
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• pp.57-61
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• 2001

일반적으로 Asphaltene은 원유뿐만 아니라 화석연로원(Fessil Fuel Sources)에도 포함되어 있는 것으로 알려져 있으며 난분해성으로 탄화수소(Hydrocarbon)와 Heterocyclic 또는 N-, S-, 산소를 포함하는 화합물이다. 그리고 금속성 물질이 Asphaltene Fraction에 농축되어 있는 것으로 알려져 있다. 한편 이러한 metallo-complex는 Asphaltene의 구조화합물중 방향족계 sheet 사이에 Self-association 상태로 존재한다. Asphaltene의 분해는 일반 TPH나 BTEX계 유류의 분해 기작과는 매우 상이하며 현재까지 Asphaltene으로 오염된 토양의 복원 기술을 매우 미미한 것으로 알려져 있다. 따라서 본 연구는 Asphalteme으로 오염된 토양의 복원 기숙을 개발하기 위한 전단계로 Asphaletene의 구성물질과 저분자화 작용기작을 구명하여 효과적 복원기술 개발을 위하여 Arabian Light Oil에서 Oil 자체와 Oil에서 분리해낸 Asphaltene을 사용하여 용매조건과 처리제별로 저분자화 과정을 조사하였다.

• Korean Journal of Soil Science and Fertilizer
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• v.17 no.1
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• pp.1-6
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• 1984

Soils in Cheju Island, derived mostly from volcanic ashes, were collected for chemical analysis to determine the effect of land utilization pattern on soil chemical characteristics. The coastal area has long been used for intensive farming and some of the mid-mountain region were recently reclaimed for agricultural crop production. The cation exchange capacity and the organic matter in the soils increased in the order of coastal area < mid-mountain belt < upper mountain area, while pH, base saturation, available phosphorus and exchangeable bases decreased with the elevation. Generally, the organic matter, the cation exchange capacity and the exchangeable bases of the Cheju soils were found to be considerably higher than the Korean mainland soils. However, the base saturation and the available phosphorus were far below the mainland average. The ratio of monovalent basic cations to total exchangeable bases showed the highest in the soils of the mountain belts and the lowest in the coastal area soils. These data suggest that a higher soil pH in the coastal area as compared to the mountainous slopes has resulted not from the sea water but from continuous application of alkaline fertilizers and times.

• Ecology and Resilient Infrastructure
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• v.4 no.4
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• pp.193-199
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• 2017

In this study, changes of soil properties including soil texture, specific surface area, organic matter content, pH, cation exchange capacity and exchangeable cations content were investigated in response to strong acid or base accident. The properties changed significantly when the soil reacted with 10 M HCl or 1 M NaOH (i.e., when one gram of soil received 50 and 5 mmol of HCl or NaOH), respectively. When the soil reacted with 10 M HCl or 1 M NaOH solution, soil texture changed from sandy loam to loamy sand and specific surface areas decreased from $5.84m^2/g$ to 4.85 and $1.92m^2/g$, respectively. The soil organic matter content was reduced from 3.23% to 0.96 and 0.44%, and the soil pH changed from 5.05 to 2.35 and 10.65, respectively. The cation exchange capacity decreased from 10.27 cmol/kg to 4.52 and 5.60 cmol/kg, respectively. Especially, high concentrations of $Al^{3+}$ or $Na^+$ were observed in acidic or basic spills, respectively, which is likely to cause toxicity to terrestrial organisms. The results suggest that restoration of soil properties, as well as soil remediation, needs to be carried out to maintain the soil function in chemical spill sites.

• Korean Journal of Soil Science and Fertilizer
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• v.43 no.4
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• pp.478-483
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• 2010

This study was conducted to investigate the physico-chemical properties of Schizandra chinensis Baillon orchard soils located in Jangsu-gun, Jeollabuk-do. Surface (0 to 10 cm) soils were collected from 200 experimental sites located at Jangsu-eup (53 site), Gyenam-myeon (31), Chunchun-myeon (73), Janggye-myeon (12), Bunyam-myeon (31). The soil texture was mostly loamy sand, and the mean values of degree of soil aggregate and soil porosity were 33.1 and 59.9%, respectively. The pH, EC, total-N, available-P, soil organic matter, and cation exchange capacity of the soils were $5.51{\pm}0.54$, $290{\pm}139{\mu}S\;cm^{-1}$, $946.3{\pm}65.5mg\;kg^{-1}$, $319.6{\pm}29.2mg\;kg^{-1}$, $29.0{\pm}13.9g\;kg^{-1}$ and $4.11{\pm}0.34cmol_c\;kg^{-1}$, respectively. The concentrations of Pb, Cd, Cu and Zn were $3.48{\pm}0.55$, $0.09{\pm}0.04$, $6.90{\pm}0.91$ and $97.7{\pm}42.2mg\;kg^{-1}$, respectively. The presented data can be utilized in better managing Schizandra chinensis Baillon orchard soils in the studied areas.

• Economic and Environmental Geology
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• v.43 no.6
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• pp.543-553
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• 2010

This study was focused on the mineralogical and geochemical characteristics of field soil of the Baekje Kingdom from K wongbawigol site in Jeongdongri, Buyeo and whether the bricks from Songsanri Tombs and Muryung's Royal Tomb were made of soil from this site. Soil samples show the similar size fraction as a silt loam and acidic soil, whereas some samples have the enrichment of organic matter, P and S. Also, they have similar geochemical behavior of elements and similar mineral phases consisting of quartz, plagioclase, orthoclase, vermiculite, mica and kaolinite. The enrichment of iron oxide is found in some soil layer, including the iron oxide mottling and precipitation along plant roots and they are attributed to repeat oxidation and reduction environments due to flooding and drainage of field soil. It's anthropogenic alteration by human activity. Especially, it is assumed that the concentration of the iron oxides found in bricks from Muryung's Royal Tomb and Songsanri Tombs is the additional evidence that soil in this study is probably the raw materials of those bricks.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.5
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• pp.709-716
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• 2011

In order to collect basic data of soil environment in the Vicinity of King Sejong Station, King George Island, Antarctica, the physico-chemical characteristics of soils were investigated. Soil samples were collected in Barton Peninsula from 13 sites according to direction from the Sejong Cape. Soils from 13 sites were divided into three groups. The sand percentage of soils were much higher as above 90% than silt and clay percentages of soils at the all sites. Soil texture was classified sandy (10 sites) and loamy sand (3 sites). In distribution characteristics at different soil particles according to direction, large particles ($>500{\mu}m$) were higher in the order of Group 1 (Marian cove coast regions) > Group 2 (Inland regions) > Group 3 (Maxwell bay coast regions). On the other hand, small particles ($<355{\mu}m$) were higher in the order of Group 3 > Group 2 > Group 1. Chemical characteristic of soils showed significant differences at different areas. pH ranged 4.5-6.7, showing it was slightly acid and EC ranged $0.06-0.16dS\;m^{-1}$. T-N, OM and T-C contents were high at #6, #8, #12 and #13 sites. T-P and P2O5 contents were high at #9 and #12 sites. The results of this study will be helpful to understand soil environment in the Antarctic Peninsula and surrounding islands.