• 아시안잔디학회지
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• 제11권2호
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• pp.89-95
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• 1997

Soil chemical properties were investigated to elucidate vertical movement of mineral nutrients in a fairway slope of 27 year-old golf course. Soil samples were taken at every 10cm depth to 4Ocm on 4 sites 20m apart each along two parallel lines 60m apart on the slope(15˚) in August. Accord-ing to the similarity of vertical distribution pattern they could be classified into 6 distinctive groups(magnesium, nitrate, phosphorus, ammonium, manganese and copper) and the slope tended to affect the vertical movement of minerals. The contents of Ca and Mg increased with depth while NO$_3$-N and Zn decreased and correlated positively. Soil pH showed significant positive correlation with depth, Ca and Mg. Phosphorus content was highest in 10~20cm depth and decreased resulting in relatively high content in 30~40cm depth of the bottom site of slope. Iron distribution pattern was similar to phosphorus. Potassium and $NH_4$showed various(irregular) patterns. Mn was highest in the deep layer at the lower sites of slope but it was reverse at the upper sites and negatively correlated with Fe. Cu content incresed with depth and heighest in 20~30cm depth. Electroconductivity showed significant positive correlation with $NO_3$-N. Magnesium, cal-cium and copper seem to be prone to defficiency due to fast leaching, and nitrate and phosphorus prone to excess problem. Preventive measures on acidification of surface soil should be taken.

• 한국지하수토양환경학회지:지하수토양환경
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• 제27권1호
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• pp.39-49
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• 2022

Bottom ash generated from thermal power plants is mainly disposed in landfills, from which metals may be leached by infiltrating water. To evaluate the effect of metals in leachate on soil and groundwater, we characterized bottom ash generated from burning cokes, bituminous coal, the mixture of bituminous coal and wood pellets, and charcoal powder. The bottom ash of charcoal powder had a relatively large particle size, and its wood texture was well-preserved from SEM observation. The bottom ash of charcoal powder and wood pellets had relatively high K concentration from total element analysis. The eluates of the bottom ash samples had appreciable concentrations of Ca, Al, Fe, SO₄, and NO₃, but they were not a significant throughout the batch test. Therefore, it is considered that there is low possibility of soil and groundwater contamination due to leaching of metal ions and anions from these bottom ash in landfills. To estimate the trend of various trace elements, long-term monitoring and additional analysis need to be performed while considering the site conditions, because they readily adsorb on soil and aquifer substances.

• 한국토양비료학회지
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• 제5권1호
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• pp.17-23
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• 1972

밭 토양 특히 신 개간지 토양에서 결핍되기 쉬운 무기성분을 종합적으로 함유하는 종합 무기성분 거름을 제조하여 그 비효를 조사하기 위하여 우리나라 주로 모임별 토양을 공시하여 시험한 결과 1. 자실수량은 산성모암인 화강암을 모재로한 토양에서 그도의 종수 효과를 보였으나 염기성 모암인 현무암 및 혈암을 모재로한 토양에서는 그 시용효과가 없었다. 2. 화강암을 모재로한 토양에서는 C.M.F시용량에 비례하여 자실수량이 증가하였으나 현무암 및 혈암토양에서는 C.M.F. 1수준(118.5kg/10a)에서는 약간 증수하는 경향이었으나 2수준(237.0kg/10a)에서는 오히려 감수하는 경향이였다. 3. C.M.F 시용에 따른 식물체중 양분함량변화는 점소는 염기성모암을 모재로한 토야에서는 별 차이가 없으나 산성모암을 모재로한 토양에서는 감소하는 경향이었으며 칼슘함량은 이와 반대의 경향을 보였으며 인산, 마그네슘 및 붕소는 각 토양에서 공히 증가하였고 가리는 화강암을 모재로한 숙전토양에서는 약간 감소하였으며 그외 토양에서는 모두 증가하였다. 또한 이들 양분의 식물체중 흡수량은 C.M.F. 시용으로 각 성분 공히 증가하는 경향이었으며 자실수량과의 관계는 1~5%의 정의 상관관계를 보였다. 4. C.M.F시용에 따른 작물 수확후 토양중 잔류양분함량 변화를 보면 질소 및 치환성 망강 함량은 감소하였으나 pH, C.E.C., $Av-P_2O_5$, Ex-CaO, Ex-MgO 및 수용성 붕소 함량은 현저히 증가하였다. 또한 토양중 잔류된 무기양분 함량과 자실수량과의 관계를 보면 Ex-CaO. 및 Ex-MgO 함량과는 1%수준의 정상관관계를 치환성 망강량과는 1%수준의 부상관관계를 보였다.

• 한국대기환경학회지
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• 제12권3호
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• pp.255-262
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• 1996

다양하고 복잡한 환경요인에 의해 발생된 산림쇠퇴에 대한 회복책의 하나로 1990년 11월부터 1993년 8월까지 3년에 걸쳐 서울시 중심에 위치한 남산과 광릉지역의 소나무 우점종인 군집에 석회, 마그네슘, 석회+마그네슘+ 복합비료를 시용한 후 소나무잎의 왁스함량, 접촉각 및 무기양이온 함량, 토양의 산도를 분석하여 시비처리의 효과를 알아보고자 실시한 연구 결과는 다음과 같다. 1. 남산, 광릉지역 소나무잎의 왁스함량 및 접촉각값은 토양시비에 따라 증가하였고, 엽령이 증가함에 따라 접촉각값은 작아졌다. 2. 소나무잎의 K, Ca 함량은 남산에서 높았으나, Mg 함량은 광릉지역에서 높았다. 소나무잎의 K, Mg 함량은 남산과 광릉 모두 시비가 계속됨에 따라 증가하여 시비의 효과가 나타났다. 3. 토양산도는 남산지역이 pH 4.2$\sim$4.3, 광릉지역이 pH 4.6$\sim$4.9이였고, 토양시비처리에 따른 토양 산도는 변화가 없었다. 그러나 토양시비처리 기간이 경과함에 따라 무시비구에 비하여 시비처리구의 토양 pH가 상대적으로 높아지는 경향을 보였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.884-889
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• 2005

A lot of landslides were occurred in Gangnung, Macheon and Geochang areas by Typhoons such as RUSA(2002) and MEAMI(2003). Soil properties of these areas are investigated regarding geological conditions in this study. The shallow plane failure were occurred in Gangnung and Geochang areas, whereas the deep circle failure were occurred in Macheon area. The matrix in Gangnung and Geochang areas was composed of Granite, and the matrix in Macheon area was composed of Gabbro. The disturbed and undisturbed soils were sampled in these areas. As the results of laboratory tests using sampled soils, the coefficient of permeability in Granite region is lower than that in Gabbro region. In the cases that the silt and clay contents are included less than 4% for the soils of Granite region and less than 7% for the soils of Gabbro region, the coefficients of permeability are rapidly increased for both soils. In addition, the simple equations for predicting the coefficients of permeability are proposed using the effective particle size and the silt and clay contents according to geological condition.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2006년도 총회 및 춘계학술발표회
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• pp.194-197
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• 2006

제주도 대표토양을 대상으로 이들의 모재 및 토양단면의 토양 특성을 조사하고, 제주도 대표토양의 주요 유해 중금속 원소의 총 함량을 분석하여 그 분포특성과 이화학 및 광물학적 특성을 비교 평가하였다. 주성분분석 결과 전형적인 화산회토의 특성을 보이는데 하부 층위에서 Si, Al, Fe 함량의 증가 및 표토에서의 염기용탈을 보여주었다. 현무암질 모재 기원임을 보여주는 ferromagnesian 광물들이 주로 관찰되었으며 심토에서는 상당량의 깁사이트가 관찰되는 것이 특징인데 이는 표토에서 과잉 생성된 알루미늄이 하부토양으로 이동하여 이차적으로 생성집적된 것으로 판단된다. 중금속 총함량 분석결과, Zn, Ni, Co, Cr의 함량이 세계 토양 내 함량범위를 초과하였으며 향후 진행될 연구에서 제주도 화산회 토양의 주 점토구성광물인 알로페인을 비롯한 점토광물 및 비정질 물질에 대한 특성 및 정량적 조사와 중금속원소별 화학적 형태 파악을 위한 연속추출분석 등을 수행하여 중금속원소의 존재상을 규명하고 지표 토양 및 지하수 환경으로의 중금속 이동성을 평가하고자 한다.

• 한국초지조사료학회지
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• 제14권3호
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• pp.223-229
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• 1994

To find out the effects of phosphatic fertilizer application levels on the botanical composition, mineral contents and mineral nutrient deprivation of grasses and the chemical properties of soil, this expriment was arranged as a randomized complete block design with six treatments(0, 50, 100, 150, 200 and 250kg $P_2O_5$/ha) and conducted at hilly land in Gwangju, Gyeonggi Province from September, 1989 to October, 1992. The results obtained are summarized as follows: The botanical composition of grasses without posphatic fertilizer application was poor but with 150kg $P_2O_5$/ha application, remarkably increased in legume of grasses and decreaed in weed. As the phophatic fertilizer levels increase, P, Ca and Mg content of grasses were increased but N and K content tended not to be regular, and Ca/p and K/Ca+ Mg equivalent ratio were lowered. Up to 150kg $P_2O_5$/ha application level, the mineral nutrient content deprived by dry matter yield was increased but with that over application, tend not to be increased. Most of applied mineral elements were accumulated at a subsurface of grassland and as the phosphatic fertilizer application levels increase, the available $P_2O_5$ and exchangeable Mg contents of the soil tended to be remarkably increased and exchangeable K content tended to be decreased, but pH, OM and exchangeable Ca content tended not to be regular.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.1092-1099
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• 2009

Landslide researches are divided to a method of interrelationship for various factors, method of predicting landslide possibility, and method of estimating landslide risk which are occurring landslides in the natural slope. Most of landslides occurred in natural slope are caused by a heavy rainfall in summer season. Weathered soil layer located in upper side of rock mass was occurred. As well as, they are announced to have an influence to geometry, geology, soil characteristics, and precipitation in the natural slope. In order to investigate and interpret the variety of landslides from field investigation to risk analysis, landslide analysis process due to geotechnical and geological opinions are systematically demanded. In this research, the study area is located in Macheon area, Gyeongsangnam-do and performed the landslide investigation. From the results of landslide investigation and analysis, optimized standard model based on natural landslide is proposed to high technical method of landslide investigation and interpretation.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권3호
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• pp.14-24
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• 2021

Aquifer thermal energy storage (ATES) system uses groundwater thermal energy for cooling and heating of buildings, and it is also often utilized to provide warm water to crops and plants for the purpose of enhancing agricultural yields. This study investigated the potential influences of a ATES system on the geochemical properties of groundwater by simulating the variation of hydrochemistry and saturation index of groundwater during ATES operation. The test bed was installed at an agricultural field, which is mainly composed of an groundwater-rich alluvial plain. The simulation results showed no significant precipitation of mineral phases such as manganese-iron oxide, carbonate and sulfate around the ATES test bed, as well as no debasement of other important water quality parameters. The implementation of ATES system in the study area was appropriate and effective for utilizing the thermal energy of groundwater for agricultural use.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.422-425
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• 2005

Spectral characteristics depending on soil constituents and their proportion in a soil were firstly studied for monitoring of soil contamination using hyperspectral remote sensing. The reflectance spectra of heavy metals in soils were investigated in the VIS-NIR-SWIR regions (400-2500 nm) to observe spectral variation as a function of constituents and concentrations. Commercial kaolinite soils mixed with lead, copper, arsenic, and cadmium were used as synthetic soil samples for spectral measurement. In case of copper, relatively spectrally active regions was observed with some band shift whereas other heavy metals had only simple spectral variations expected to be related to the sorption phase and the amount of metal onto kaolinite. The reflectance spectrum of each metal on kaolinite could be identified in VIS-NIR region.