• 해양환경안전학회지
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• 제21권5호
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• pp.492-500
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• 2015

본 논문에서는 새만금 개발사업이 해양환경에 미치는 영향에 대한 국민들의 인식을 분석하였다. 이를 위해 새만금 인근지역인 전북 군산시, 김제시, 부안군 400가구 및 새만금 인근지역 외 전국 600가구 등 총 1,000가구를 대상으로 설문조사를 수행하여 얻은 결과를 분석하였다. 또한 새만금 개발사업의 경제적 효과 및 해양환경 영향을 동시에 고려할 때 새만금 개발사업에 대해 판단하는 공공의 태도에 영향을 미치는 요인을 분석하기 위해 서열프로빗 모형을 적용한 통계적 분석을 수행하였다. 인식조사 결과, 새만금 개발사업의 경제적 효과와 해양환경 영향을 동시에 고려할 때, 새만금 인근지역조사 및 전국조사 응답자의 70 % 이상이 새만금 개발사업을 반대하였다. 또한 설문조사 응답자의 90 % 이상이 새만금 방조제 외해역의 해양환경관리가 필요하다고 인식하고 있었다. 따라서 새만금 방조제 외해역 환경관리를 위한 적절한 대책이 마련되어야 할 것이다.

• 한국해안해양공학회지
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• 제2권1호
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• pp.34-42
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• 1990

우리나라 서해안 새만금해역의 조석을 수량적분한 수치모형에 의해 조사하였다. 첫 단계로서 4개 주요분석(M$_2$, S$_2$, $K_1$, $O_1$)의 외해경계외력을 부여함으로써 독립적인 조석체계를 산정하였다. 수립된 모형은 이 해역에 방조제가 건설될 시 주요분조의 변화양상을 1차적으로 평가하는데 적용된 바 반일구조의 진폭은 방조제 전면에서 2-7cm확폭되나 일주조는 큰 변화가 없었다. 반면에 방조제에 의한 주류체계는 큰 변화를 제시하는데 방조제 전면부의 유속감소와 최대해저마찰응력의 변화를 볼 때 전면부의 토사이몰 가능성이 높은 것으로 추정된다.

• 한국농공학회논문집
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• 제51권2호
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• pp.29-34
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• 2009

A series of laboratory model tests and numerical analysis is performed to analyze characteristics of desalination and to predict a period of desalination for subsurface saturated soil in Saemanguem reclaimed area. The results show that quantity of desalination is small as salinity of water is increased. On the contrary, quantity of desalination is increased as salinity of soil is high. In order to decrease the salinity to 10 % of initial salinity of soil at depth of 2 m, it takes 11 years to desalinate the soil 50 m away from drainage ditch. For soil at depth of 1.5 m only 1 year to desalinate the soil near drainage ditch. Also, water head of 80 cm is required to desalinate to 10 % of initial salinity for 60 cm thick soil. Because the following results is based upon the Saemangeum soil, an application of this result for another field will be cautious. More research will be required on this matter.

• 한국농공학회논문집
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• 제50권4호
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• pp.39-50
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• 2008

A study on fugitive dust dispersion was conducted at Saemanguem reclaimed area located at the west coastal area of Jeon-buk Province Total reclaimed area is 40,100ha developed by building a 33km long sea dike through Gunsan, Gimje, and Buan. (Land: 28,300ha, Fresh Water Lake: 11,800ha) After this area was completely reclaimed in 2006, there has been high possibility of dust generation and dispersion to the neighboring area. The dust generated at the reclaimed land was composed mainly of minerals with high salinity, and it could make harmful effect on crop production as well on to human's health such as eye irritation and respiratory disease. Especially, when those aerosol particles are reached on the leaves of farm crops, the photosynthesis and respiration of the plants can be under restraint resulting in the decrease of agricultural productivity of the nearby farm areas. Furthermore, highly concentrated salty particles can directly damage the leaf cells. In this study, field experiment has been conducted to regularly measure the locally suspended dust particles and analyze how they were dispersed to the neighboring areas. The collected dust particles were analyzed to examine theirs sizes, concentrations, and components. The SPSS statistical program was also used to separate the dust concentration generated by the reclaimed land from the total dust concentration measured at the measuring locations.

• 농촌계획
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• 제25권3호
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• pp.115-128
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• 2019

The A1B scenario predicts that the mean air temperature of South Korea will rise up to $3.8^{\circ}C$ by 2071. However, the effects of ecosystem services are declining because of various environmental problems, including climate change, land use change, stream intensification, non-point pollution, and untreated garbage. Moreover, horticultural sites which have various ecosystem services suffer highly absorbed heat from the heat island phenomenon associated with climate change. Therefore, we analyzed the heat island phenomenon occurring in an protected horticulture estimated area in Saemanguem, South Korea. Using an advanced measurement method, we examined the air temperature change derived from water channels as well as open spaces. The CFD analysis of coverage ratio 85% design showed wind speed of 2.09 m/s and temperature of $38.07^{\circ}C$. At a coverage ratio of 70%, the wind speed was improved to 2.61 m/s and the temperature was improved to $36.89^{\circ}C$. In Alternative 2 with wetlands and trees, the wind speed was 2.71 m/s and the temperature was $35.90^{\circ}C$. When the coverage ratio decreases to 55%, the wind speed increases showing 3.06 m/s and the temperature decreases showing $35.18^{\circ}C$.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.299-307
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• 2009

New lake dike in Saemanguem area is 125km length and require a great amount of fill materials, but it's difficult to get the amount of materials and develop a quarry because of environment conservation. Therefore, the solution is to use the dredged soil in project area as the fill materials not to develop quarry. However, characteristic of dredged soil as a silty fined sand is very weak at seepage, sliding, erosion of dike due to infiltration of rainfall, wind etc. So, lake dike using dredged soil must be constructed safely against the unstable problem of dredged sand. The objective of research is to make safe lake dike using dereged soil on construction of Saemangeum new lake dike. So, we analyzed the characteristic of dredged soil and suggested a standard section of lake dike.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.1458-1465
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• 2010

A lot of dredging and reclaming projects are recently under way in Korea for the efficient use of limiting land space. Saemanguem area is special case of reclaiming by dredged soil. In case of a confined disposal of dredged soils by a pump dredger, generally coarse grained soils are separated from fines with dropping at the near part of the pump dredger. This kind of seperation of fine contents could be a factor of liquefaction by earthquake. In Korea, recently, earthquakes with magnitude of 3.0 or higher are distinctively increasing in 1990. In this study, cyclic shear characterics of Saemanguem Dredged sand depending on fine content were analyzed. A series of undrained cyclic triaxial test with cyclic stress ratio ($\sigma_d/{2\sigma_{{\upsilon}c}}'$) were performed on both isotropic consolidated specimen and sand with fine contents of 0%, 5%, 15%, 30%, 40% under the effective vertical stress of 100kPa and 50% and 60%, 70% of relative density for fine content of 0%, respectively. In the test results, cyclic shear strength increased by increasing of cyclic stress ratio($\sigma_d/{2\sigma_{{\upsilon}c}}'$) with increasing the relative density at the same number of cyclic under the effective confining pressure of 100kPa. It is almost highest the double amplitude(DA) 1%, 3%, 5%, 7.5% and 10% at fine content of 15% between Cyclic stress ratio($\sigma_d/{2\sigma_{{\upsilon}c}}'$) value at cyclic number five and fine content. Number of cyclic is 30 under the effective vertical stress of 100kPa, 70% of relative density for fine content of 15%. when the cyclic stress ratio at each relative density was compared at cyclic number five, the double amplitude(DA) 1%, 3%, 5%, 7.5% and 10%, and the pore-pressure ratio (${\Delta}u/{\sigma'}_c$) 0.95 value were compared; under the relative density of 70% and the effective confining pressure of 100kPa. The pore-pressure ratio (${\Delta}u/{\sigma'}_c$) 0.95 value showed a similar trend to the double amplitude (DA) 5% line.

• 한국토양비료학회지
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• 제44권1호
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• pp.48-52
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• 2011

The effect of soil water content on the transformation potential of N compounds derived from hydrolysis of urea applied in a reclaimed tidal soils which was saline-sodic was observed to evaluate nitrification rates of urea. Soil samples were collected from Moonpo series at the newly reclaimed area in Saemanguem. For the transformation potential of N compounds from urea (46% N), newly reclaimed tidal soils (RS) were amended with urea at the rates of 0, 10, and 20 kg $10a^{-1}$. With leachate obtained from the incubated RS in a leaching tube at $25^{\circ}C$, urea hydrolysis and nitrification were measured for a total of 30days. The cumulative amounts of $NO_3{^-}$-N in each of the four soils treated with urea was linear with time of incubation. Results showed that increase in pH occurred with increasing application rate of urea and volumetric water content due to hydrolysis of urea. The total N in the RS was decreased with incubation time, indicating that rates of urea hydrolysis was influenced by soil moisture conditions. Also, the cumulative amount of nitrate in RS gradually increased with increase in time of incubation.

• 한국환경복원기술학회지
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• 제18권3호
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• pp.1-11
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• 2015

This research was conducted to compare the effect of soil amendment and loess on physial and chemical properties of dredged soil and primary height growth of Ulmus davidiana var. japonica. Three types of research plots: control plot (Dredged soil only), DC treatment plot (Dredged soil + soil amendment) and DCL treatment plot (Dredged soil + soil amendment + Loess) were set at Okgu research site in Saemanguem. 32 trees of U. davidiana var. japonica were planted in each plots after 14 months from the construction. Soil texture, pH, electrical conductivity (EC), organic matter (OM), total nitrogen (TN), available P, exchangeable cation ($K^+$, $Na^+$, $Mg^{2+}$, $Ca^{2+}$) and sodium chloride were measured after 3 years from the construction. Also, survival rate and height of U. davidiana var. japonica were measured 22 months after planting, and the correlation between height of trees and the physico-chemical properties of soil were analyzed. Even though pH in both DC and DCL treatment plots are lower than control plot, they are still alkaline (> pH 8). OM, TN and available P in both DC and DCL treatment were higher than the control. Particularly, the content of available P in both DC and DCL treatment plots are 1.4~5.1 times and 2.0~3.1 times higher than the control respectively. The concentration of exchangeable Mg in DCL treatment plot was 1.1~5.5 times higher than the control (p < .05). The survival rate of the species was the highest in DCL treatment plot (98%) followed by DC treatment plot and the control. The average height of the trees in both DC and DCL treatment plots is 1.1m while the control is 0.8m. OM, TN, available P, K+ were significantly related to the height of U. davidiana var. japonica(p < .01). The results indicate that soil amendment affects on soil physial and chemical properties of dredged soil and height growth of U. davidiana var. japonica.

• 한국산림과학회지
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• 제106권2호
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• pp.186-195
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• 2017

본 연구에서 일반 토양에 비해 무기양분 함량이 적고 배수성이 좋지 않은 새만금간척지 토양에 식재 된 포플러 수종의 생리적 특성을 조사하였다. 7월과 8월에, 이태리포플러 클론인 Venziano, L.Avanzo와 미루나무 교잡종 클론인 97-18, 97-19은 생리적인 특성의 차이를 보였다. 이태리포플러 클론이 미루나무 교잡종 클론에 비해 생리적 특성이 우수하였다. 특히 Venziano 클론의 순광합성률은 각각 평균적으로 $18.62{\mu}mol\;CO_2\;m^{-2}{\cdot}s^{-1}$, $17.11{\mu}mol\;CO_2\;m^{-2}{\cdot}s^{-1}$로 다른 클론들과 비교해서 높은 수치를 보였다. 반면, 미루나무 교잡종인 97-18클론의 7월 광색소 함량은 $2.37mg{\cdot}g^{-1}FW$으로 가장 높은 수치를 보였으나, 8월에는 이태리포플러 클론보다 낮은 함량을 보였다. 미루나무 교잡종은 8월에 순광합성률, 광색소함량 등 전반적인 생리적 활성이 떨어졌다. 결론적으로, 새만금간척지에 식재된 포플러 묘목의 생리적인 특성은 이태리포플러 종인 Venziano 클론이 우수하였다.