• Title/Summary/Keyword: sustainable environmental development

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Development of Revegetation Methods for Restoration of the Disturbed Slopes -Application on the Seed Attached Ripping Net Revegetation Methods- (급경사 비탈면의 녹화 공법 개발 -종자부착 리핑네트공법을 중심으로-)

  • Kim, Eui-Young;Kim, Nam-Choon;Kang, Jin-Hyung;Bae, Sun-Woo
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.5 no.4
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    • pp.61-69
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    • 2002
  • This study was conducted to develop revegetation methods for the restoration of the steep slopes by seed attached ripping net revegetation methods. In general, steep slopes with decomposed granite soils and ripping rock are easy to erode by precipitation and impossible to revegetate only using hydroseeding with core net mulching because of poor soil fertility. The Seed Attached Ripping Net Revegetation Methods(SALNRM) will be the most popular and sustainable methods to restore decomposed granite soils and ripping rock exposed slopes. The main results are summarized as follows; 1. The net size with $1.5cm{\times}1.0cm$ density was more suitable for growing plants, and increasing the ratio of the slow release fertilizer was better to make early coverage and to grow germinated plants. 2. The fertilizer bag made by the ratio of Peatmose : Vermiculite : Perlite : Quick release fertilize r : Slow release fertilizer = 10 : 2 : 5 : 3 : 4 (v : v) was the best for plant's growth. 3. According to the seed mixture experiments, even though not using foreign grasses, the SALNRM using native plants can make diverse plant composition. 4. The SALNRM will make same early ground coverage by only using native plants like using foreign grasses. The SALNRM would become the popular revegetation methods to restore decomposed granite soils and ripping rock exposed slopes in Korea.

Integrated Surface-Groundwater Hydrologic Analysis for Evaluating Effectiveness of Groundwater Dam in Ssangcheon Watershed (쌍천 지하댐의 효용성 평가를 위한 지표수-지하수 통합 수문해석)

  • Kim, Nam-Won;Na, Han-Na;Chung, Il-Moon
    • Economic and Environmental Geology
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    • v.44 no.6
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    • pp.525-532
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    • 2011
  • In this study, the usefulness of underground dam as a means for the sustainable development of groundwater, and its performance in the management of groundwater resources were analyzed. The fully integrated SWAT-MODFLOW was applied to the Ssangcheon watershed in Korea to evaluate the effectiveness of groundwater dam construction. After construction, the groundwater level raised in the upstream area of groundwater dam while lowered in the downstream area. Also, it is shown that the exchange rate of river-aquifer interactions increased in the upper area of the dam. Since the storage capacity of the aquifer largely increased in the upper area of the dam, the exploitable groundwater could be greatly increased as much. This study demonstrated that a groundwater dam was a very useful measure to increase the available storativity of groundwater aquifers. It also represented that the combined analysis using SWAT-MODFLOW was helpful for the design and opeation of groundwater dam in the Ssangcheon watershed.

Strength Development and Carbonation Characteristics of Slag Cement/Class C Fly Ash blended CO2 Injection Well Sealant

  • Kim, Tae Yoo;Hwang, Kyung-Yup;Hwang, Inseong
    • Journal of Soil and Groundwater Environment
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    • v.21 no.2
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    • pp.29-37
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    • 2016
  • CO2 injection well sealant is vulnerable to supercritical CO2 (scCO2) exposure. To develop an alternative to the conventional sealant system (class G cement/class F fly ash), the performance of slag cement (SPC) systems containing class F fly ash (FFA) or class C fly ash (CFA) was evaluated and compared with the conventional sealant under scCO2 conditions. All sealant systems showed an immediate increase in compressive strength upon scCO2 exposure and, at 37.6 MPa, SPC/CFA showed the highest compressive strength after 14 days, which was much higher than the 29.8 MPa of the conventional sealant system. Substantial decreases in porosity were observed in all sealant systems, which were partly responsible for the increase in strength. Carbonation reactions led to pH decreases in the tested sealants from 12.5 to 10~11.6. In particular, the greatest decrease in pH in slag cement/class C fly ash probably supported relatively sustainable alkali activation reactions and the integrity of cement hydrates in this system. XRD revealed the presence of CaCO3 and a decrease in the content of cement hydrates in the tested sealants upon scCO2 exposure. TGA demonstrated a greater increase of CaCO3 and calcium-silicate-hydrate phases in SPC/CFA than in the conventional sealant upon scCO2 exposure.

Development of infiltration facility by utilizing tree box for urban storm water runoff reduction (도시지역 우수유출 저감을 위한 식재박스형 침투시설의 개발)

  • Joo, Jin-Gul;Cho, Hye-Jin;Lee, Yu-Hwa;Kim, Lee-Hyung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.11
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    • pp.5330-5336
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    • 2011
  • It becomes more and more important to develop various infiltration facilities for healthy water cycle and reduction of urban storm water runoff. In this study, a infiltration facility by utilizing tree box was developed. The developed facility is capable of reducing storm water road runoff, improving urban water cycle, and performing other sustainable and environmental functions. Because the facility can be manufactured to a smaller size than an existing runoff reduction facility, it can be installed at various road types of not only existing urban areas, but new developed areas. If the facility is applied to four-lane roadways, it is expected to reduce 65% of rainfall runoff discharge. Urban flood control improvement can be accomplished by a wide application of the developed technique.

Accessing socio-economic and climate change impacts on surface water availability in Upper Indus Basin, Pakistan with using WEAP model.

  • Mehboob, Muhammad Shafqat;Kim, Yeonjoo
    • Proceedings of the Korea Water Resources Association Conference
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    • 2019.05a
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    • pp.407-407
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    • 2019
  • According to Asian Development Bank report Pakistan is among water scarce countries. Climate scenario on the basis IPCC fifth assessment report (AR5) revealed that annual mean temperature of Pakistan from year 2010-2019 was $17C^o$ which will rise up to $21C^o$ at the end of this century, similarly almost 10% decrease of annual rainfall is expected at the end of the century. It is a changing task in underdeveloped countries like Pakistan to meet the water demands of rapidly increasing population in a changing climate. While many studies have tackled scarcity and stream flow forecasting of the Upper Indus Basin (UIB) Pakistan, very few of them are related to socio-economic and climate change impact on sustainable water management of UIB. This study investigates the pattern of current and future surface water availability for various demand sites (e.g. domestic, agriculture and industrial) under different socio-economic and climate change scenarios in Upper Indus Basin (UIB) Pakistan for a period of 2010 to 2050. A state-of-the-art planning tool Water Evaluation and Planning (WEAP) is used to analyze the dynamics of current and future water demand. The stream flow data of five sub catchment (Astore, Gilgit, Hunza, Shigar and Shoyke) and entire UIB were calibrated and validated for the year of 2006 to 2011 using WEAP. The Nash Sutcliffe coefficient and coefficient of determination is achieved ranging from 0.63 to 0.92. The results indicate that unmet water demand is likely to increase severe threshold and the external driving forces e.g. socio-economic and climate change will create a gap between supply and demand of water.

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Development of Evaluation Method of Fisheries Sensitivity to Ocean Environments in Korea Waters (해양환경 기반 한국 연근해 어장 민감도 평가 기술 개발)

  • Joo, HuiTae;Yoo, ManHo;Yun, Sang Chol;Kim, Chang Sin;Lee, Min Uk;Kim, Sangil;Park, Kyoung Woo;Hwang, Jae-Dong;Oh, Hyun Ju;Yun, Seok-Hyun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.4
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    • pp.508-516
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    • 2021
  • Although scientist have been reporting recently that changes in ocean environment influence the species composition, movements, and growth of fish in Korea waters. Previous studies on fish vulnerability owing to climate changes are insufficient to explain the effect of fluctuating ocean environments on fisheries ground. In this study, we suggested a method for the assessment of fisheries sensitivity to various factors in ocean environments in Korean waters. To evaluate the fisheries sensitivity, catch data (Chub mackerel, Hairtail, Common squid, small yellow croaker) from National federation of fisheries cooperatives in Korea (1991-2017) and oceanographic data from Korea Ocean Data Center (KODC; 1960-2017) were normalized using the z-score method. Thereafter, the fisheries sensitivity was calculated using the difference between the catch data and the oceanographic data. Finally, the fisheries sensitivity was evaluated based on evaluation grade ratings. Result revealed that in the south sea, variability in catch data was obviously higher than environmental fluctuation (evaluation grade 1), indicating that catch variability in response to environmental change is most sensitive in the south sea among Korean waters in 2017. These results would be helpful for fishery management and policy for sustainable yield in Korean waters.

Analysis and Study of Safety Technical Standards in Domestic Photovoltaic Field (국내 태양광분야 안전성 기술기준 분석 및 연구)

  • Yoon, Yongho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.6
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    • pp.207-212
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    • 2018
  • The increase in the size and the uptake of PV systems is leading to significant increase in the penetration of PV into local electricity grids. The increased penetration of PV is impacting on grid operation and in particular the voltage within the local grid can be significantly influenced by the various PV systems. The current global situation of environmental pollution, climate change and energy demand urgently requires dramatic political, economic and technical decisions in order to avoid a potential collapse of environmental and social systems. Around the world, electricity remains the vital component of national and international development. The implementation of renewable energy resources can provide solutions to these challenges by stimulating the early implementation of economically viable sustainable energy technologies.

An Empirical Study on the Relationship between Corporate ESG Activities, Green Innovation and Corporate Performance: Focused on the Chinese Manufacturing Companies (기업의 ESG 활동, 녹색 혁신과 기업성과 간 관계 연구: 중국 제조기업을 중심으로)

  • Zeng, Zhuoqi;Oh, Minjeong;Choi, Sungyong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.45 no.3
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    • pp.186-196
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    • 2022
  • In recent years, ESG activities (Environment, Social and Governance) have been paid more and more attention by enterprises and their stakeholders in various countries. China is the largest developing country in the world. The ESG performance of Chinese listed enterprises helps to understand the shortcomings of their sustainable development ability and further enhance the firm value. Moreover, the interaction effect between green innovation investment and ESG activities is of great significance for enterprises to balance the resource allocation between the two factors in the future. Taking listed Chinese manufacturing companies from 2011 to 2020 as an example, this study investigates the influence of ESG activities on financial performance and non-financial performance, and tests the moderating role of green innovation. Our results show that: (1) ESG performance has a negative impact on financial performance; (2) ESG performance has a positive impact on non-financial performance; (3) Green innovation can positively adjust the negative impact of environmental activities on financial performance. However, it will enhance the negative impact of governance activities on financial performance. The interaction effect between green innovation and social activities on corporate financial performance is a substitution effect; (4) With the improvement of green innovation level, the positive impact of ESG overall performance and environmental performance on corporate reputation will also be suppressed.

Perceptions of the Relationship between Port Security Level, Resilience, Cargo Operational Performance, and Sustainability Performance among Korean Port Operators and Shipping Companies

  • Chan-Ho Kim;Sang-Gyun Choi;Sung-Ki Kim
    • Journal of Korea Trade
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    • v.27 no.3
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    • pp.65-86
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    • 2023
  • Purpose - As globalization progresses, complexity also increases, and various factors that threaten port functions are emerging. Accordingly, the demand for port security to prevent the crisis and resilience that quickly recovers its original function after the crisis is also increasing in port operations. However, few studies have examined how to ensure the port security and how the resilience affects operation performance of port and sustainability performance as well. So the study aims to find out how port security affects port resilience and port operational performance, and consequently, this two factors affect socioeconomic and environmental sustainability performance respectively and synthetically. Design/methodology - Confirmatory Factor Analysis (CFA) was first performed to determine the validity of the factors of model and hypothesis test was performed using Structural Equation Model (SEM) to analyze the Port Performance Model, which show the perception logic among port security level, port resilience, operation performance, and sustainability performance. In order to empirically analyze this model, total 264 respondents from port security operators, shipping companies in South Korea were surveyed. Findings - As result of SEM, First, port security level positively affected the resilience (H1) and cargo operational performance (H2) but not in both of the sustainability performances (H3, H4). Second, resilience positively affected only cargo operational performance (H5) and socio-economic sustainability performance (H7). Last, cargo operation performance positively affects the both of sustainability performances (H8, H9). Originality/value - It was confirmed that port security could improve cargo operational performance through ensuring port resilience and eventually increase the socio-economic sustainability. Therefore the study implies that careful integration and management of port security, port resilience, and sustainability are required, along with compromise on sustainable development goals in the social, economic, and environmental area among all stakeholders.

Analysis of Vehicle Demand by Fuel Types including Hydrogen Vehicles (수소차를 포함한 연료유형에 따른 자동차 수요 분석)

  • Yuhyeon Bak;Jee Young Kim;Yoon Lee
    • Environmental and Resource Economics Review
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    • v.32 no.3
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    • pp.167-190
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    • 2023
  • This study analyzes the potential demand for automobiles based on fuel type using survey data in Korea. The dependent variable of the model is the future desired fuel type, including gasoline, diesel, hybrid, electricity, and hydrogen. The main explanatory variables are the respondent demographic characteristics, key reasons for choosing vehicle fuel type and environmental awareness extracted via principal component analysis (PCA). Using a multinomial logit (MNL) model, we find that respondents who consider fuel economy and infrastructure increase the demand for a hybrid car but decrease the demand for electric and hydrogen vehicles. The denial-types increase the demand for gasoline (petrol) and diesel (light oil), and decrease the demand for electric vehicles. The anxiety-types increase the demand of hybrid vehicles, and decrease the demand for electric vehicles. In contrast, in the case of pro-types, the demand for diesel (light oil) hydrogen vehicles decreased.