• Title/Summary/Keyword: Coastal Application

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The effect of biogas slurry application on biomass production and the silage quality of corn

  • Hua Sun;Kai Shi;Hairong Ding;Chenglong Ding;Zhiqing Yang;Chen An;Chongfu Jin;Beiyi Liu;Zhaoxin Zhong;Xia Xiao;Fuyin Hou
    • Animal Bioscience
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    • v.36 no.12
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    • pp.1918-1925
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    • 2023
  • Objective: The objective of this study was to evaluate the effect of biogas slurry application on biomass production and the silage quality of corn. Methods: A field experiment was conducted in which corn was grown using different biogas slurry application rates. The effect of 25% to 500% biogas slurry nitrogen replacement (T1 to T14) on the yield and quality indices of corn were studied by field plot experiments. Results: The results revealed that biogas slurry application improved the stem diameter and relative feed value of corn silage in treatments T13 and T11. Moreover, the fermentation quality of corn silage was improved due to an increase in lactic acid content; in comparison with the chemical synthetic fertilizer (CF) group. The crude protein contents of corn silage had no obvious change with increasing biogas slurry application. However, the forage quality index of acid detergent fiber was decreased (p<0.05) in the T11 group compared with the CF group. In addition, higher (p<0.05) 30 h in vitro dry matter digestibility and 30 h in vitro neutral detergent fiber digestibility were observed in the T11 and T13 groups than in the CF group. Conclusion: Based on these results, it was concluded that the optimum biogas slurry application rate for corn was approximately 350% to 450% biogas slurry nitrogen replacement under the present experimental conditions.

Development and Application of the Integrated Coastal Observing System (통합연안관측 시스템의 개발과 적용(수공))

  • 박종화;이순혁
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2000.10a
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    • pp.359-364
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    • 2000
  • The paper presents the results of a study on the desired observing system which setting the high-level objectives for an integrated, sustained, national coastal observing system. Knowledge of the coastal zone is demanded by many constituencies, including fishermen, fisheries managers and climatologist, harbor pilots, coastal zone managers, environmental protection professionals etc. Many of these needs are being partially met by coastal zone observing system elements, both satellite and in situ. Nevertheless, these have not enough developed in an integrated manner and have been funded and operated to meet their own purpose. Thus, this study presents the development and application method for a national coastal zone observing system, which is integration of disparate observational systems and data sets to maximize their utility for many users and purposes.

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The Methods of Coastal Disaster Mapping Using Digital Map (수치지도를 이용한 연안재해지도 작성 방안)

  • Jeong, Jong-Chul
    • Journal of Environmental Impact Assessment
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    • v.16 no.5
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    • pp.373-379
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    • 2007
  • Natural hazards such as typhoon, flood, landslide affect both coastal and inland areas more often according to increasement of severe and unusual weather. To provide adequate coastal disaster mitigation strategies, coastal disaster prevention system using GIS is very useful. Application methods of digital map on this issue was discussed in this study. For developing of coastal disaster prevention system, the data structures related to disaster monitoring is needed to be revised for interdisciplinary framework. To improve the current coastal disaster mapping methods, GIS based new model for coastal disaster mapping was suggested. In this study, coastal GIS showed the attribute data and structures of coastal disaster mapping.

A Tsunami Simulation Model based on Cellular Automata for Analyzing Coastal Inundation: Case Study of Gwangalli Beach (지진해일로 인한 해안 침수 분석을 위한 셀 오토마타 기반의 시뮬레이션 모델 개발: 광안리 해변 사례 연구)

  • Joo, Jae Woo;Joo, Jun Mo;Kim, Dong Min;Lee, Dong Hun;Choi, Seon Han
    • Journal of Korea Multimedia Society
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    • v.23 no.5
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    • pp.710-720
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    • 2020
  • Tsunami occurred by a rapid change in the ocean floor is a natural disaster that causes serious damage worldwide. South Korea seems to be out of the range of this damage, but it is quite possible that South Korea will fall within the range due to the long-distance propagation features of tsunami and many earthquakes occurred in Japan. However, the analysis and preparation for tsunami have been still insufficient. In this paper, we propose a tsunami simulation model based on cellular automata for analyzing coastal inundation. The proposed model calculates the range of inundation in coastal areas by propagating the energy of tsunami using the interaction between neighboring cells. We define interaction rules and algorithms for the energy transfer and propose a software tool to effectively utilize the model. In addition, to verify and tune the simulation model, we used the actual tsunami data in 2010 at Dichato, Chile. As a case study, the proposed model was applied to analyze the coastal inundation according to tsunami height in Gwangali Beach, a famous site in Busan. It is expected that the simulation model can be a help to prepare an effective countermeasure against tsunami and be used for a virtual evacuating training.

The Application of Wind Profiler Data and Its Effects on Wind Distributions in Two Different Coastal Areas (연안지역 지형적 특성에 따른 윈드프로파일러 자료의 자료동화 효과 분석)

  • Jeong, Ju-Hee;Lo, So-Young;Song, Sang-Keun;Kim, Yoo-Keun
    • Journal of Environmental Science International
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    • v.19 no.6
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    • pp.689-701
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    • 2010
  • The effects of high-resolution wind profiler (HWP) data on the wind distributions were evaluated in two different coastal areas during the study period (23-26 August, 2007), indicating weak-gradient flows. The analysis was performed using the Weather Research and Forecasting (WRF) model coupled with a three-dimensional variational (3DVAR) data assimilation system. For the comparison purpose, two coastal regions were selected as: a southwestern coastal (SWC) region characterized by a complex shoreline and a eastern coastal (EC) region surrounding a simple coastline and high mountains. The influence of data assimilation using the HWP data on the wind distributions in the SWC region was moderately higher than that of the EC region. In comparison between the wind speed and direction in the two coastal areas, the application of the HWP data contributed to improvement of the wind direction distribution in the SWC region and the wind strength in the EC region, respectively. This study suggests that the application of the HWP data exerts a large impact on the change in wind distributions over the sea and thus can contribute to the solution to lack of satellite and buoy data with their observational uncertainty.

A Study on Management of Marine Geographic Information System (해양지리정보체계의 관리방안 연구)

  • KIM, Jong-Kyu;KIM, Jong-Hwa
    • Journal of Fisheries and Marine Sciences Education
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    • v.14 no.2
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    • pp.161-176
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    • 2002
  • GIS (geographic information system) is a relatively new tool in the coastal and ocean area management toolbox, but its uses and functionality are quickly being recognized. GIS can help identity potential threats to coastal and ocean resources and evaluate alternative land-use and management practices. The application of GIS to coastal and ocean issues continues to grow as the general use of GIS matures. GIS software and technicians with the skills to apply GIS are now commonplace at federal, state and local government agencies as well as many NGOs and the private sector. However, these applications were focused on their special purposes. Therefore, we describe the management strategy of marine GIS and its components. The results of this study can be used as the fundamental guideline for the coastal and ocean management and sustainable development.