• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2002년도 추계 합동 특강 및 학술발표대회
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• pp.64-64
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• 2002

• 상하수도학회지
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• 제23권6호
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• pp.711-717
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• 2009

In this study, SWMM model is used to reproduce the main storm sewer system located in the Nae-Hang drainage basin of the Mokpo city and keep track of flood discharge. Given the outlet of the reaches border the coastline, this paper has taken the dual-drainage approach to perform inundation simulation, considering both the overflows and inflows at the manholes of the sewer system, and at the same time, taking the impacts of tidal stage into consideration. The following conclusions are reached in this study: First, when planning lowland sewer system alongside the coastline or the riverside, the tidal stage or flood stage need to be considered in the planning and design processes. Second, an analysis that fails to consider overflow and inundation at the manholes may overestimate inundation depth of the flooded area. In other words, in order to estimate flood discharge and flood stage in a lowland storm sewer system, it is desirable to analyze the conveyance capacity of storm sewer system and simulate overflow and inundation at the manholes at the same time.

• 한국석유지질학회:학술대회논문집
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• 한국석유지질학회 1997년도 제4차 학술발표회 발표논문집
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• pp.1-11
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• 1997

Thirty one samples from Late Cretaceous and Tertiary interval sections (468-783m) of the Kachi-I Well in Block II, Yellow Sea Basin, have been analysed for their terrestrially derived palynofloras. The systematic study of the palynomorphs recovered has yielded one hundred and fifty-five taxa; forty-three species of spores belonging to twenty-eight genera, seventy-seven pollen assignable to forty-three genera, and twenty-seven species assignable to fifteen genera and eight fungal remains. The results of both qualitative and quantitative analysis propose a succession of eight terrestrial palynomorph associations. Seven associations are erected in Late Maastrichtian and one in Early to Middle Miocene. Age determinations are on the basis of palynomorph taxa alone for the all associations. The Late Cretaceous/Tertiary unconformity is recognised at between 603 and 613m, based on the palynological data. The sedimentary basin during the Late Cretaceous seem to be lowland shallow marginal lacustrine with stagnant, mesotrophic conditions. On the other hand, the basin during the Early-Middle Miocene is considered to have been characterised by lowland swamp areas. The palaeoclimatic conditions during the Late Cretaceous are considered to be humid tropical to subtropical, while during the Early to Middle Miocene they are considered to be warm temperate with humid conditions. A comparison of palynomorph assemblages between the present study and the previous studies of Late Cretaceous in Circum-Pacific Northern Hemisphere is made, These assemblages reveal that lower sections (612-783m) of the Kachi-I well belong to the Late Cretaceous Aquilapollenites province of Herngreen and Chlonova (1981) and Srivastava (1981, 1994).

• 한국초지조사료학회지
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• 제14권1호
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• pp.18-26
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• 1994

Forage quality evaluation with several grasses grown at a high altitude pasture situated at 1,000m above sea level was made to determine what is the feed value of these grasses and whether these grasses have any differences in forage quality compared with the grdsses grown at lowland pastures. In this experiment, Common, Venture, and Palaton reed canarygrass (Phahris arundinucea L.) and Climax timothy (Phleum pratense L.) were used and harvested at two different dates, 5 July and 30 September, 1989. Cmde protein (CP) concentrations in the grasses grown in September were higher than in July. Among the grasses grown, Palaton and Common reed canarygrass were highest in CP concentration in July and September, respectively. Acid detergent fiber (ADF) and neutral detergent fiber (NDF) concentrations in the grasses harvested in July were higher than in September. Palaton reed canruygrass was lowest in ADF and NDF concentrations at the both harvest dates. Relative feed value (RFV) in the grases harvested in July was ranged from 92 to 105 and that in September was from 110 to 117. Palation reed canarygrass had the highest RFV of 105 and 117 in July and September, respectively, therefore, the forage quality of this grass was ranked as Grade 2 based on the AFGC Hay Quality Standards. Overall forage quality of the grasses grown at a high altitude pasture seemed to be higher than the forage quality at lowland pastures. Based on the RFV assigned by the AFGC, forages with RFV 92 to 117 in this experiment could only work well in rations for low producing dairy cows.

• Geomechanics and Engineering
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• 제5권1호
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• pp.57-70
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• 2013

Constant rate of strain (CRS) consolidation tests were conducted for undisturbed Ariake clay samples from three boreholes in Saga Plain of Kyushu Island, Japan. The coefficients of consolidation ($c_{\nu}$) were interpreted from the CRS test results by small- and large-strain theory. Large-strain theory was found to interpret smaller $c_{\nu}$ values and less strain rate effect on $c_{\nu}$ than that by small-strain theory. Comparing the theoretical strain distributions within a soil specimen to those obtained by numerical simulation shows that the small-strain theory can be used only for the dimensionless parameter $c_{\nu}/\dot{\varepsilon}H_0^2{\geq}50$ (where $\dot{\varepsilon}$ is strain rate and $H_0$ is the specimen height), and the large-strain theory can be used for a larger range of strain rates. Applying the criterion to undisturbed Ariake clay with a $c_{\nu}$ value of about $1{\times}10^{-7}\;m^2/s$, it is suggested that the large-strain theory should be adopted for calculating the $c_{\nu}$ value when $\dot{\varepsilon}$ > 0.03%/min.

• 한국산학기술학회논문지
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• 제8권1호
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• pp.110-115
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• 2007

도시지역의 우수관거는 최근 발생 빈도가 높은 국지적 집중호우에 대하여 배수기능 수행이 취약한 실정이며, 특히 저지대 역류 현상에 따른 침수피해는 도시 설계 및 관거 개량사업에 있어서 반드시 해결해야할 사항이다. 본 연구에서는 강우분석을 통한 도시유출특성을 고려하여 현행 우수관거의 설계빈도에 대한 통수능력을 검토하였으며, 방류하천의 계획홍수위 영향을 고려하여 관거 내 역류 및 저지대 침수량을 분석함으로써 도시유역의 원활한 내수배제를 위한 유수지 및 펌프장의 설치 여부 및 규모 산정을 위한 기초자료를 제공하였다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2012년도 학술발표회
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• pp.36-36
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• 2012

Drainage water in lowland paddy fields is quantitatively influenced recycle and/or repeated irrigation by irrigation facilities, i.e. pumps, check gates, small reservoirs and so on. In those drainage channels, nutrients accumulation and increasing organic matters are considered to be occurred, and water quality would be degraded not only environmental aspect but irrigation purpose. In general, Total Nitrogen (T-N) is interested water quality index in irrigation water, because high nitrogen concentration sometimes caused decreasing rice production by excess growth and fallen or degrading quality of taste, then, farmers would like to clear water less than 1mg/L of T-N concentration. In drainage channel, it is known that the nitrogen concentration change is influenced by physical, chemical and biological properties, i.e, stream or river bed condition, water temperature, other water quality index, and plant cover condition. In this study, discharge data (velocity and level) in a drainage channel was monitored by an Acoustic Doppler system and water quality was sampled at same time in 2011. So those data was analyzed by multi regression model to realize hydrological and environmental factors to influence with nitrogen concentration. The results showed the difference tendency between irrigation and non-irrigation period, and those influenced factors would be considered in water quality model developing in future.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2019년도 추계학술대회
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• pp.21-21
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• 2019

Approximately 80% of rice field in Africa conducts in rainfed (Nishimaki 2017). The rice is damaged by water stress because fields like rainfed lowland repeat drying and humidity of soil because of impossible water control. Then water stress is one of the major limiting factors for decreasing rice yield. So, in initial growth stage, quick and efficient root development is useful way to avoid drought stress by getting water from deeper soil layer with roots elongation as the hypothesis. Daniel et al (2016) reported that NERICA1 and NERICA4 show different patterns of root plasticity for drought stress. NERICA1 has greater development of lateral root in shallow soil layer, while NERICA4 has greater development in deep root elongation to underground. This study was aimed to evaluate the effect of root development in initial growth stage on growing NERICA1 and NERICA4 under different soil moisture condition in rainfed lowland rice field. They were grown in same water condition until 35 days after sowing (35DAS), and after that each varieties were separated in dry and wet condition. The rice plants were grown until 60DAS. The results of soil moisture, the root extension angle, shoot dry weight and bleeding ratio showed that NERICA4 can mitigate dry stress from surface soil compered to NERICA1.

• 한국작물학회지
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• 제25권4호
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• pp.10-16
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• 1980

벼의 내한성에 관여하는 생태 및 형태적인 특성을 찾기 위하여 수도과 능도 각 5품종씩을 가지고 파종상자에서 벼를 재배하고 건조처리한 후 다시 관수하여 위주상태에서 생육이 회복되는 정도를 비교하였으며 관련되는 식물체부위의 특성과의 관계를 구한 결과 다음과 같이 요약할 수 있였다. 1. 건조처리후 재생력은 수도가 육도보다 강하였고 수도에서는 인도형품종이 일본형 품종보다 강하였다. 2. 생육단암별 재생력은 생육초기에 가장 높았고 생육이 진전되면서 점점 낮아졌는데 어느 시기에서나 수도가 육종보다 높은 재생력을 나타내었다. 3. 초장과 엽면적의 차이는 건조처리후 재생력에 영향을 미치지 않았다. 4. 뿌리 발달의 특성에 주근의 두께와 뿌리의 총건물중은 수도보다 육도에서 높았으며 이것은 밭재배에서의 수량과 높은 정의 상관이 있었다.

• 한국잡초학회지
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• 제17권3호
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• pp.262-268
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• 1997

경북지역 벼재배지에서 잡초분포현황을 조사하여 잡초방제의 기초자료로 활용코자 조사한 결과는 다음과 같다. 1. 생활사별 잡초 분포에 있어서 일년생이 56.5%로서 다년생 43.5% 보다 많았으며 형태적 분포는 화본과 25.2%, 사초과 12.3%, 광엽잡초 62.5%로 분포하였으며 화본과 잡초의 발생이 1971년, 1981년보다 증가하는 경향이었다. 2. 지대별 잡초 분포에서 평야지, 중간지, 냉조풍지에서는 피, 벗풀, 올방개, 물달개비가 우점초종이었으며 답종류별로는 보통답과 습답은 우점초종이 서로 비슷하게 발생하였으나 사질답에서는 잡초 발생 양상이 다르게 나타났다. 3. 손이앙답과 건답직파에서는 피의 우점이 가장 높았으나 기계이앙묘에서는 벗풀, 여뀌바늘 등이 우점잡초였고 이앙기별로는 이앙기가 늦어질수록 피의 발생이 많았다. 4. 경북지역의 주요 우점잡초는 피, 벗풀, 여뀌바늘, 올방개, 물달개비 순으로 나타났다.