• 한국환경과학회지
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• 제30권12호
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• pp.1015-1025
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• 2021

Our research work aimed to evaluate cover crop effects of winter rye on soil characteristics, soil conservation, and yield productivities on potato fields with 15% slope during a fallowed period. There were two controls of bared field without any cultivation and conventional potato cultivation without winter rye. Potato cultivation increased soil pH, organic matter, available phosphate, and exchangeable cation regardless of cover crop cultivation. Sub-soil, particularly, all components of soil chemical properties showed higher value in winter rye cultivation than conventional cultivation. Higher soil density was observed on cover crop cultivation than conventional cultivation resulting from root residues of the cover crop both topsoil and subsoil. Cover crop residues positively affected plant growth and reduced the amount of soil erosion by holding the soil. Although severe soil erosion was seen in conventional cultivation, winter rye cultivation declined soil erosion by 47% during the fallow period on potato slope fields. Distinct soil bacterial communities were detected among treatments and some OTU(Operational Taxonomic Unit)s showed significantly higher abundance in winter rye treatment. Total yield and commercial rate demonstrated no significant differences while higher tuber phosphate, K⁺, and Mg²⁺ contents were observed in winter rye cultivation.

• 보존과학회지
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• 제25권2호
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• pp.155-160
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• 2009

유구의 지속성과 안정성을 높이기 위하여, 저점도 Epoxy인 SE-101의 토양의 입자 크기와 수분 함량에 따른 침투성과 전단 강도를 측정하였으며, 이 결과들을 이용하여 SE-101의 사용법을 최적화하고자 하였다. 점도 데이터로부터 충분히 예상되었듯이, 입자의 크기가 증가할수록 침투도는 증가하였으나, 전단 강도는 감소하였으며 특히, 고분자의 불균일한 경화 속도와 내부 무기 첨가제에 따라서 침투도의 편차가 심하여 질 수 있음을 알 수 있었다. 토양 내의 수분 함량이 증가할수록, 침투도와 전단 강도의 편차가 매우 심하여져서 동일 시편 내에서도 매우 취약한 부분이 생성되고, 유구 이전 중의 파손 현상 발생도 예측할 수 있어 이전재의 침투 깊이의 50% 이상은 건조된 상태에서 사용하는 것이 필요한 것으로 보인다.

• Journal of Forest and Environmental Science
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• 제30권4호
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• pp.331-341
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• 2014

The present study is an attempt to give an account of the inventory of plant species, phytosociological characteristics of vegetation and pedological characteristics of Rambi Beat Forest under Senchal East Forest Zone, Darjeeling, West Bengal, India. Its plant community were analyzed quantitatively and synthetically. The results reflect dominancy of dicotyledons over monocotyledons in the four studied sites The plant community comprising of 50 plant species belonging to 40 genera of 27 families. Ramhi beat reflected higher diversity of species. Maximum IVI value was recorded by Viola surpense (47.17) in Rambhi forest beat. The Berger parker index and evenness index were found to be highest for Viola surpense, Fragaria nubicola, Pilea umbrosa in Rambhi beat. The soil characteristics of the different pedons revealed alkaline nature of soil in Rambhi beat. Higher levels of soil organic carbon content reflect higher fertility of the soil of Rambhi beat. The response towards soil available nitrogen and phosphate were different among the ten pedons of Rambhi beat. Therefore, proper management and conservative measures needs to be implemented for conservation of bioresources in Senchel wildlife Sanctuary of West Bengal, India.

• 한국환경복원기술학회지
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• 제13권5호
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• pp.180-188
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• 2010

This study was carried out to evaluate the analysis of environmental change (forest resources and soil water conservation by land types) after planting for prevention of between 2003 and 2006 from the stone hazarding areas in Guizhou province, China. Mean diameter growth of the trees was highest for Melia azedarach, followed by Robinia pseudoacacia, Lonicera fulvotomentosa, Choerospondias axillaris, Cupressus duclouxiana, and Eucommia uimoides Oliv. Mean height growth of the trees was greatest for R. pseudoacacia, followed by Ilex kudincha, M. azedarach, C. duclouxiana, C. axillaris, E. uimoides Oliv, Zanthoxylum bungeanum, and L. fulvotomentosa. Tree biomass was greater at the afforestation sites by 1.22-1.71 ton/ha compared to that of severely eroded mountain areas. The capacities of soil water conservation by land types were 2,790 ton/ha at latent rock desertification farmland, 2,655 ton/ha at rock desertification farmland, 1,680 ton/ha at dolomite sandstone hilly country, 1,650 ton/ha at halfstony hilly country, and 1,590 ton/ha at karst physiognomy site. Soil erosion was estimated to be 1,285 ton/$km^2$ which had been 2,178 ton/$km^2$ before afforestation. Also, we should be continuative manage after planting for prevention of the stone hazarding areas in Guizhou province, China.

• 한국환경복원기술학회지
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• 제11권2호
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• pp.1-9
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• 2008

The objective of the study is 10 know the relation of landslide occurrence with using TPI (Topographic Position Index) in the Pyungchang County. Total 659 landslide scars were detected from aerial photographs. To analyze TPI, 100m SN (Small-Neighborhood) TPI map, 500m LN (Large-Neighborhood) TPI map, and slope map were generated from the DEM (Digital Elevation Model) data which are made from 1 : 5,000 digital topographic map. 10 classes clustered by regular condition after overlapping each TPI maps and slope map. Through this process, we could make landform classification map. Because it is only to classify landform, 7 classes were finally regrouped by the slope angle information of landslide occurrence detected from aerial photography analysis. The accuracy of reclassified map is about 46%.

• 아시안잔디학회지
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• 제10권1호
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• pp.49-59
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• 1996

This report is researched on the cause and mechanism of soil erosion in comparison among Kwangnung, Mt. Kaya, Mt. Chili, and Mt. Soorak by physical and chemical analyses of their for- est soils. Clay, silt, and fine sand of Mt. Soorak are far less than those of Mt. Chili, Mt. Kaya, and Kwangnung area while coarse sand is very high level. The clay ratio of soil at Mt. Soorak is the most high level in comparison with that of other area. Denudation at Mt. Soorak, therefore, is cause of erosion by the result of transportation of soil particles. The eroding velocity increase for larger particle size and stronger cohesion between soil particles. Very fine sand, silt, and clay can be present in suspension near the bottom and the size of the particles in suspension depends upon the velocity of the current near the bottom and the roughness of the bottom. Key words: Theoretical analyses, Soil erosion and conservation, Forest soils.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.357-360
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• 2005

Soil loss is widely recognized as a threat to farm livelihoods and ecosystem integrity worldwide. Soil loss prediction models can help address long-range land management planning under natural and agricultural conditions. Even though it is hard to find a model that considers all forms of erosion, some models were developed specifically to aid conservation planners in identifying areas where introducing soil conservation measures will have the most impact on reducing soil loss. Revised Universal Soil Loss Equation (RUSLE) computes the average annual erosion expected on hillslopes by multiplying several factors together: rainfall erosivity (R), soil erodibility (K), slope length and steepness (LS), cover management (C), and support practice (P). The value of these factors is determined from field and laboratory experiments. This study calculated soil erosion using GIS-based RUSLE model in Imha basin and examined soil erosion source area using SPOT 5 high-resolution satellite image and land cover map. As a result of analysis, dry field showed high-density soil erosion area and we could easily investigate source area using satellite image. Also we could examine the suitability of soil erosion area applying field survey method in common areas (dry field & orchard area) that are difficult to confirm soil erosion source area using satellite image.

• 보존과학회지
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• 제35권2호
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• pp.177-186
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• 2019

국내 목조문화재 흰개미 방제법 중 하나인 토양처리법에 적용되는 약제는 우천이나 지중의 수분 거동에 의해 방의 효력 저하가 진행되어 재처리가 요구되지만 현재 해당 기준 및 평가 방안은 전무한 실정이다. 이에 따라 약제의 방의 효력 평가 및 재처리 기간 산정을 위한 기초 실내 평가 방안을 제시하였다. 먼저 약제 방의력 평가를 위해 흰개미에 대한 기피성 및 접촉 독성을 실시하였다. 그 결과, 이번 실험에 사용된 약제는 비기피성이며, 접촉에 의한 사멸이 확인되었다. 이후 모의 강우 실험과 토양 관통 시험을 통해 토양 내 약제의 방의 효력 임계점을 산정하는 지속성 평가를 실시하였고 해당 자료를 기상 자료와 비교하여 재처리 기간을 산정하였다. 지속성 평가 결과, 약 160~170 mm 이상의 지속적인 수분 노출 이후에는 약제 처리 토양에 대한 흰개미의 천공이 확인되었다. 해당 결과를 최근 5년간 기상 자료와 비교한 결과, 본 실험에서 사용된 농도의 약제는 우리나라 장마철과 여름철 집중호우 기간이 지난 9월 이후 처리할 경우 약 1년 정도 방의 효력이 유지될 것으로 예상된다. 본 연구는 향후 국내 흰개미 방제를 위한 토양처리용 약제의 선정 매뉴얼 작성과 재처리 기간 산정을 위한 기초자료를 제공 할 수 있을 것으로 기대된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제22권6호
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• pp.74-84
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• 2017

Soil erosion is often extreme in Korea due to high rainfall intensities and steep slopes, and climate change has also increased the risk of erosion. Despite its significane, erosion-induced soil organic carbon (SOC) emission and water resource loss are not well understood, along with the lack of an integrated surface soil erosion protection policy. Therefore, to design adequate protection policies, land users, scientists, engineers and decision makers need proper information about surface soil and watershed properties related to greenhouse gas emission potential and water conservation capability, respectively. Assuming the total soil erosion of $346Tg\;yr^{-1}$, soil organic matter (SOM) content of 2% (58% of SOM is SOC), and mineralization rate of 20% of the displaced carbon, erosion-induced carbon emission could reach $800Gg\;C\;yr^{-1}$. Also the available water capacity of the soil was estimated to be 15.8 billion tons, which was 14 times higher than the yearly water supply demand in Seoul, Korea. Therefore, in order to prevent of soil erosion, this study proposes a three-stage plan for surface soil erosion prevention: 1) classification of soil erosion risk and scoring of surface soil quality, 2) selection of priority areas for conservation and best management practices (BMP), and 3) application of BMP and post management.

• 보존과학연구
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• 통권31호
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• pp.69-77
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• 2010

Preservation of artifacts that are excavated from archeological sites is closely related to soil environment. Biological remains are especially influenced by degradation activity of microorganism from soil environment. In this study a preserved human bone in archaeological tomb, Tou-kwang-myo from Joseon Period was analyzed to characterize bacteria groups by molecular genetic tools using 16S rDNA sequences. 117 clones were identified and classified 9 phylogenetic groups : ${\alpha}$-, ${\beta}$-, ${\gamma}$-, ${\delta}$-Proteobacteria, Sphingobacteria, Clostridia, Actinobacteridae, Nitrospiraceae, and Gemmatimonadetes according to homologous 16S rDNA sequences submitted in NCBI. ${\gamma}$-Proteobacteria group appears the highest ratio in bones (about 35%) while about 19.6% belong to the Actinobacteria group. The results may contribute to study on the effect of microorganisms on the human remains with burial method.