International Journal of Environment and Sustainable Development (12 papers in press)
An empirical assessment of the Environmental Kuznets Curve for CO2 emissions in Ghana
by Michael Minlah, Richard Ayisi
Abstract: Ghana has achieved significant economic growth over the period 1971 -2009. However, it is widely acknowledged that economic growth has its negative environmental consequences. In very recent years environmental policy has been more directed towards correcting environmental ills such as deforestation, desertification and pollution which result from human activities. Issues of global warming and climate change have taken central stage in environmental policies of Ghana. This study investigated the determinants of CO2 emissions in Ghana within the Environmental Kuznets Curve analysis for the period 1971 to 2009. The long run analysis between the regression variables was established using the ARDL approach to co-integration. The study reveals an inverted N shaped relationship between CO2 and economic growth in Ghana. While urbanization, energy consumption and deforestation proved to be statistically insignificant in promoting carbon dioxide emissions in Ghana, trade openness and financial development were observed to reduce carbon dioxide emissions.
Keywords: Environmental Kuznet Curve; Co2; Ghana.
Biodiversity in Lithuania: achievements, challenges and policy
by Gintare Sujetoviene, Jūratė Žaltauskaitė, Renata Dagiliūtė
Abstract: Biodiversity is the key to the stability and productivity of natural systems. Preserving biodiversity is therefore one of the most important environmental issues for both developing and developed countries. The aim of the study is to reveal the main temporal trends of biodiversity and related indicators in Lithuania, post-soviet country. Analysis focuses on the biodiversity and related indicators like forest coverage, protected areas, red list, and administrative infringements in protected areas covering the period of the last two decades (1991-2014) after the reestablishment of independence which is considered as transition period. After the restoration of independence, the country became a participant in international law collaboration. Despite relatively good situation in biodiversity conservation, loss and fragmentation of the habitats due to economic activities as well as infringements highly contribute to the current challenges. Public information and awareness rising as well as strong political is still needed.
Keywords: governance; Lithuania; biodiversity; nature conservation.
Measurement of Environmental Sustainability Index and Its Association with Socio-economic Indicators in Selected Asian Economies: An Empirical Investigation
by Ajay Kumar
Abstract: The present study created the environmental sustainability index (ESI) for selected 22 Asian economies during 1990-2012. Composite z-score technique was applied to estimate country-wise ESI which explores the relative performance of these economies in environmental sustainability (ES). For this, 7 main components with 25 sub-indicators of environmental performance were chosen. Thereupon, it assessed the association among the ESI, Human Development (HD), economic development and social development using linear, log-linear and non-linear regression models. It implies that economic development, HD and social development have significant and complex association with ESI. It emphasizes that global and national policy makers, governmental agents and international development organizations need to take effective action to maintain ES. Otherwise, Worlds economies would be unable to achieve the path of sustainable economic development in future. It brings out some conclusive policy suggestions to maintain the environmental sustainability, economic development, HD, social development and sustainable development in Asian economies.
Keywords: Composite Z-score technique; Economic development; Environmental degradation; Human development; Natural resource; Social development; Sustainable environmental development; Linear; non-linear and log-linear regression model.
Mechanical characterization and flexural performance of eco-friendly concrete produced with fly ash as cement replacement and coconut shell coarse aggregate
by Prakash R, Thenmozhi R, S.N. Raman
Abstract: The aim of this study is to investigate the effect of adding fly ash, an industrial by-product and coconut shell, an agricultural waste on the mechanical and flexural characteristics of eco-concrete. The study focusses on density, compressive strength, tensile strength and flexural behavior of the coconut shell eco-concrete. Two different mixes are developed, one with coconut shell and the other with conventional aggregate and coconut shell as coarse aggregate. The cement content is replaced with Class F Fly ash at 0%, 10%, 20% and 30% by weight. The test result shows that the coconut shell concrete produced with 10% fly ash has recorded higher compressive, tensile strength than other proportions. Fly ash inclusion further reduces the density of coconut shell concrete. The higher deflection of coconut shell concrete before failure shows that it has failed in a ductile manner. The flexural behavior is comparable with other lightweight concretes. It is suggested that an eco-friendly, cost effective structural lightweight concrete can be produced by using coconut shell and fly ash.
Keywords: Coconut shell aggregate; Fly ash; Eco-concrete; Compressive strength; Split tensile strength; Flexural behavior.
An assessment of road construction in Walmer Township, Nelson Mandela Bay Municipality, South Africa
by Pakama Siyongwana, Manesh Nagar
Abstract: The provision of a sustainable road infrastructure has become a top priority for the South African government since the attainment of democracy in 1994. This paper reports on a study carried out in Nelson Mandela Bay Metropolitan Municipality, South Africa, aimed at assessing the provision of the road infrastructure and the financial sustainability of road infrastructure development from 2004-2011 in the Walmer Township. The methodology used in the study was a simple method of overlaying the ordinance survey onto high resolution aerial photographs using Walmer Township as the basic unit of observation and thereafter, extract and digitise the necessary information for the selected years. Fieldwork observations and interviews with relevant stakeholders were conducted to qualify the resultant pattern or to fill missing gaps. The resulting information was translated into thematic, qualitative and quantitative data. Analysis involved the generation of descriptive statistics and applicable tables; and the research was aimed at: 1) reviewing the state of road construction costs in the NMBM, 2) providing a comparative analysis of the road provision, 3) an assessment of the financial feasibility of the road infrastructure in the Walmer Township. The results showed the variation in the construction costs across time indicating spatial variation in road infrastructure developmental initiatives, discrepancies in budget allocation that favour certain areas, and a discord in the coordination of budget and planning. The studys significance lies in its highlighting of the need to review and redesign the planning of municipal infrastructure projects if they are to attain financial sustainability.
Keywords: Road infrastructure delivery; financial sustainability; Walmer Township; Nelson Mandela Bay.
BIOENERGY TECHNOLOGY DEVELOPMENT IN NIGERIA PATHWAY TO SUSTAINABLE ENERGY DEVELOPMENT
by Sunday Olayinka Oyedepo, Isreal S. Dunmade, Tunde Adekeye, Ahme, B. Attabo, Olukunle C. Olawole, Philip O. Babalola, Joseph A. Oyebanji, Mfon Udo, Oluwaseun Kilanko, Richard O. Leramo
Abstract: In Nigeria, high and outrageous energy cost constitutes a serious challenge to all aspects of the economy. And this has been a subject of concern in the country over a period of time. A dependable and renewable energy source is of utmost desire to strengthen the nations economy and this urgent need cannot be overlooked. As a result of the erratic and expensive power supply to the national grid, it has become ultimately necessary to search for other inexpensive sources of energy to meet the ever increasing energy needs for rural and urban dwellers. This will in no small way improve the countrys national grid and consequently decrease rural-urban movement. The heavy reliance on natural gas to power electric power generation plants makes the country to be prone to power outages due to gas pipelines destruction resulting to in-sufficient gas supply by Nigerian Gas Company to most thermal power plants. In view of the above energy situation in Nigeria, this paper aimed at carrying out a comprehensive review on bioenergy technology option as a pathway to achieving sustainable energy development in the country. In this study, the potential, current progressive stages, and prospects of bioenergy conversion techniques, in the Nigeria context, are discussed. The barriers to bioenergy technology development in Nigeria with possible solutions are also presented. The study reveals that available information for the studied renewable energy option suggests bioenergy possess some potentials for the countrys sustainable energy development. Using biomass technology to generate power can help the country develop its energy sector more efficiently as the raw materials needed to feed the bioenergy plants are readily available in abundance in the country. Some are seen as waste such as agricultural and domestic wastes. Hence, developing the bioenergy capacity of the country will create wealth and employment opportunities for the unemployed sector in the country, generates electricity and production of domestic cooking gas across the rural and urban settlements in the country.
Keywords: Bioenergy technology; renewable energy; energy sector; sustainable development; biomass; agricultural wastes; municipal wastes; industrial wastes.
Special Issue on: ICESW2017 Applied Engineering Science, Environment & Sustainability
RISKS OF SEISMIC ACTIVITIES ON BUILT ENVIRONMENT IN NIGERIA
by Akpabot Akpabot, Anthony Ede, Oluwarotimi Olofinnade, Gideon Bamigboye
Abstract: Buildings are designed to be safe to prevent collapse caused by natural or man-made factors. Until recently, Nigeria was believed to be aseismic due to its distance from earthquake zones. However, recent seismic activities have led to the prediction of possible future earthquake occurrence in Nigeria. This study estimate the impact of seismic hazard on the built environment in Nigeria. A model is created to estimates the number of casualties and built areas that would be affected by earthquake of different ground motions. Monte Carlo simulation is used to derive random data of building area, occupancy limits, construction quality and failure probability for the computational analysis. The results showed that an average seismic intensity measure will affect between 1000 1060 km2 of building area and about 6.5 6.9 million people will be affected. Consequently, these huge losses requires urgent mitigating efforts to reduce risks of damages when earthquake occur.
Keywords: Reinforced-concrete; Building collapse; Seismic-risks; Built area; Ground motion; Construction quality; Built environment; Seismic intensity; Monte Carlo simulation; Sustainability.
Special Issue on: Renewable Energy for Sustainable Applications
A Sustainable Energy Management Soft Computing System for Photovoltaic/Wind Hybrid Power Generation System
by SELVAM RAMAKRISHNAN, Velavan R, Soundarrajan A
Abstract: Recently, renewable energy sources turned all attentions and became more attractive, due to increasing energy needs and factors like limited reserves, increasing energy costs and environmental pollution. As these sources dont cause any environmental pollution and have an unlimited supply, it is extensively utilized every day. Solar and wind are the two renewable sources considered in this paper. In renewable energy system, for maintaining the energy sustainability, a smart management scheme is required. The renewable sources like solar/wind is established to test the management system. The development of smart management scheme fulfills the power demand, since solar and wind are not reliable in stipulations of power quality and sustainability. In the renewable energy system, the generated power is collected on a common DC bus which is used for supplying to load. This DC power bus is operated in an exceedingly manner that, there is forever a base power available for permanent loads. Then, depending upon the availability of those power sources, the extra power demand is provided from either PV or wind source. The whole system is operated by a smart management system with the help of the fuzzy logic method. The fuzzy based smart management system determines the amount of power to be supplied based on the power information from a solar / wind system. The smart power management system will measure and track the available and generated maximum power from wind system, which increases the installed units efficiency. The result obtained will prove the effectiveness of the smart power management system.
Keywords: Wind System; PV system; Power management system; MPPT; Sustainability.
Special Issue on: Green Engineering Principles for Environmental Sustainable Development
Green Environmental Sustainability Development in Construction Industry using Response Surface Methodology
by Murugaboopathy Rajagopal, Ganesan Karuppiah
Abstract: The purpose of this study was to investigate an effective method for the partial replacement of cement using waste materials to create green environmental sustainability in the construction industry. The aim was to develop a method for replacing the cement in concrete without changing its behaviour; tests were performed to predict the concretes strength, and they gave strong indications of the ideal concrete preparation method. The experimental variables were optimised using the Design-Expert 22.214.171.124 software package. Replacement was carried out with waste materials, such as groundnut shell ash (GSA; X1: 610%), ground granulated blast-furnace slag (GGBS; X2: 2050%) and polypropylene fibre (PPF; X3: 0.10.5%) for the improvement of the compressive, splitting tensile and flexural strengths of concrete using the response surface methodology (RSM). The optimum replacement of cement was observed at GSA of 7.58%, GGBS of 35% and PPF of 0.3%. Under this situation, the optimum compressive strengths of the concrete cube at 7 and 28 days were 18.7618.83N/mm2 and 30.9131.06N/mm2; the splitting tensile strengths of the cylinder at 7 and 28 days were 2.322.39N/mm2 and 432-4.41N/mm2 respectively; and the flexural strengths of the prism at 7 and 28 days were 3.373.49N/mm2 and 5.245.32N/mm2 respectively. In this experiment, most of the experimental values agreed relatively well with the predicted values. This optimisation process can be helpful in the construction industries to effectively reduce the utilisation of cement.
Keywords: Compressive strength; Flexural Strength; Poly Propylene monofilaments Fibres,rnResponse Surface Methodology; Splitting Tensile Strength.
GREEN ENGINEERING PRINCIPLES FOR GLOBAL WATER QUALITY MONITORING USING IoT
by Kavitha Velusamy, Mohanraj Senkottaiyan
Abstract: Water is a vital resource without which most of the living beings
cannot survive. The quality of drinking water depends on its source and storage
conditions. Drinking water quality should meet the Environmental Protection
Agency (EPA) regulations for quality assurance. Various purification methods
are available to obtain pure drinking water. However, several industrialisation,
globalisation, urbanisation, farming, and similar activities lead to drinking
water contamination. Thus, the combined use of green engineering principles
and internet of things (IoT) framework can aid simultaneous monitoring of
water quality at different locations, at minimal costs and less need for
manpower. This study proposes a system for real-time monitoring of water
quality and detection of contamination, by using a wireless sensor network
(WSN) to collect and transmit data. This system measures turbidity, pH, and
temperature; these values are then processed using a controller and transmitted
to the cloud through the WSN. The gathered data are highly accurate and can
be accessed universally through the Internet by using a specific internet
Keywords: IoT environment; green engineering principles; water quality
monitoring; wireless sensor networks; WSNs; cloud computing.
Special Issue on: Sustainable Development of Energy, Water and Environment Systems SDEWES
Energy Effective Routing Optimization using ACO-FDRPSO for Improving MANET Performance
by Rangaraj Jayavenkatesan, Anitha Mariappan
Abstract: Autonomous devices that are interconnected in an on demand fashion that communicate in wireless medium with the available energy constitute Mobile Adhoc Networks (MANET). Communication in these networks is restricted to lifetime of the nodes that inturn dependent upon the nodes battery power. Therefore optimization is necessary to prolong node lifetime and communication period. This work proposes a hybrid Ant Colony Optimization (ACO) combined with Fitness Distance Ratio Particle Swarm Optimization (FDR PSO) to optimize energy. ACO finds the energy efficient path in the network based on higher residual energy and FDR PSO minimizes energy consumption of the network, to enhance node lifetime which ensures energy efficient routing. Duty cycle algorithm collaborated with ACO swaps the nodes between active and sleep state depending upon their utilization. This prevents a node being active all time though it has no communication at that instant of time. The proposed hybrid technique (ACO-FDR PSO) is tested over a 100 node network scenario. The impact of varying number of nodes and their speed on the performance metrics such as throughput, packet delivery ratio, drop and residual energy have been analyzed using NS-2 simulator.
Keywords: ACO; Duty Cycle; FDR PSO; MANET; Residual Energy.
Quantification of environmental impacts of abrasive water jet cutting process through sustainability analysis
by Jayakrishna Kandasamy, Vimal KEK, Lakshimipriya Sethuram
Abstract: Sustainable development is the view that social, economic and environmental concerns should be addressed simultaneously and holistically in the development process. Sustainability has been applied to many fields, including engineering, manufacturing and design. Manufacturers are becoming increasingly concerned about the issue of sustainability. Appropriate trade-offs are often necessary, given the diverse interests of manufacturers and society. Relevant, meaningful, consistent and robust information on sustainable manufacturing must be available and utilized by organizations and their managers, if sustainability is to improve in manufacturing. In this perspective an effort has been made by conducting experimental studies on waste water obtained by machining mild steel plate using abrasive water jet cutting machine to examine the traces of metallic bodies and their impact on the environment. Studies were also conducted to calculate the embodied product energy of the process. Results from the experiment confirmed the presence of metallic particles and proved the necessity of treating these particles.
Keywords: Sustainability analysis; Abrasive water jet cutting machine; Embodied product energy; Gear cutting; Waste water treatment.