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Full-Text Articles in Environmental Sciences

Socio-Environmental Considerations At The Usuma Reservoir In Abuja, Nigeria, Fanan Ujoh Mr, James Ikyernum Mr, Olarewaju O. Ifatimehin Dr Dec 2012

Socio-Environmental Considerations At The Usuma Reservoir In Abuja, Nigeria, Fanan Ujoh Mr, James Ikyernum Mr, Olarewaju O. Ifatimehin Dr

Dr. Fanan Ujoh

Reservoirs are Man’s attempt towards water re-distribution from regions/seasons of abundance/surplus to regions/seasons of scarcity. This study focuses on socio-environmental impacts of the Lower Usuma dam in Abuja, on its four surrounding communities. Stratified random sampling technique was employed in the administration of a questionnaire to 200 respondents. Using descriptive statistics and the student t-test for the analysis, the study discovered that: (i) there has been no significant improvement in infrastructure provision by Government; (ii) cases of water-borne diseases are high; (iii) the communities have lost land for cultivation; and, (iv) the communities believe that the resettlement scheme is not …


Do We Really Need New Policies? A Study On Soil Sealing In Egypt, Ahmed Harb Rabia Oct 2012

Do We Really Need New Policies? A Study On Soil Sealing In Egypt, Ahmed Harb Rabia

Ahmed Harb Rabia A.H. Rabia

Egypt has the lowest area of agricultural land per individual in Africa. The agricultural land stands for a total of approximately 3.5 million ha which characterized about 3.5% of the total area of Egypt in 2007. The urban encroachment over arable productive agricultural land in Egypt is common and is called (urban desertification). Therefore, the annual loss of arable land to urbanization is 1.2%. This indicates a serious situation to the agricultural area. the Academy of Scientific Research & Technology (1994) has reported that during the period from 1978 to 1984, the annual expansion rates of the dwelling area ranged …


Back To The Future Of Green Powered Economies, Juan B. Moreno-Cruz, M. Scott Taylor Jul 2012

Back To The Future Of Green Powered Economies, Juan B. Moreno-Cruz, M. Scott Taylor

Juan B. Moreno-Cruz

The purpose of this paper is to introduce the concept of power density [Watts/m2] into economics. By introducing an explicit spatial structure into a simple general equilibrium model we are able to show how the power density of available energy resources determines the extent of energy exploitation, the density of urban agglomerations, and the peak level of income per capita. Using a simple Malthusian model to sort population across geographic space we demonstrate how the density of available energy supplies creates density in energy demands by agglomerating economic activity. We label this result the density-creates-density hypothesis and evaluate it using …


Mapping Soil Erosion Risk Using Rusle, Gis And Remote Sensing Techniques, Ahmed Harb Rabia A.H. Rabia Jul 2012

Mapping Soil Erosion Risk Using Rusle, Gis And Remote Sensing Techniques, Ahmed Harb Rabia A.H. Rabia

Ahmed Harb Rabia A.H. Rabia

Soil erosion is one of the major causes of land degradation in arid and semi-arid areas like Ethiopia, including Tigray Highlands, which is highly affected by the risk of desertification. Tackling on-site effects of soil erosion requires understanding of the rates of soil loss as well as identification of the major controlling factors that accelerate or slow down these processes. The study aims to quantify the soil loss by erosion process and to specify the main factor affecting the Erosion development in the study area. The Study area was Kilte Awulaelo District which is situated in the eastern part of …


Modeling Of Soil Sealing By Urban Sprawl In Wukro, Ethiopia Using Remote Sensing And Gis Techniques, Ahmed Harb Rabia A.H. Rabia May 2012

Modeling Of Soil Sealing By Urban Sprawl In Wukro, Ethiopia Using Remote Sensing And Gis Techniques, Ahmed Harb Rabia A.H. Rabia

Ahmed Harb Rabia A.H. Rabia

Soil sealing is the covering of the soil surface with materials like concrete and stone, as a result of new buildings, roads, parking places but also other public and private space. Soil sealing by urban sprawl continues to increase all over the world where the area of urbanized land is increasing even more rapidly than the population. The degree of sealing is associated to the land use type and the density of population. Techniques of Remote Sensing and Geographical Information System (GIS) have been used widely to measure urban sprawl and to analyze the spatial features and unique mechanism of …


Gis Spatial Modeling For Land Degradation Assessment In Tigray, Ethiopia., Ahmed Harb Rabia A.H. Rabia May 2012

Gis Spatial Modeling For Land Degradation Assessment In Tigray, Ethiopia., Ahmed Harb Rabia A.H. Rabia

Ahmed Harb Rabia A.H. Rabia

Land degradation can be described as reduction in the present and prospective land quality and production, due to natural or anthropogenic dynamics. This phenomenon is one of the most important problems facing farmers and decision makers in several countries. This study aims to use GIS spatial modeling to quantify land (physically and chemically) degradation in the study area based on remotely sensed and field survey’s data. A GIS spatial model has been developed based on the LADA- FAO methodology to apply a land degradation assessment in the study area. Final land degradation map has been produced by combining the outputs …


Climate Change In Cyprus: Impacts And Adaptation Measures, Theodoros Zachariadis Mar 2012

Climate Change In Cyprus: Impacts And Adaptation Measures, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.


Climate Change In Cyprus – Impacts And Adaptation Policies, Elpida Shoukri, Theodoros Zachariadis Mar 2012

Climate Change In Cyprus – Impacts And Adaptation Policies, Elpida Shoukri, Theodoros Zachariadis

Theodoros Zachariadis

This report provides a literature review of climate change facts and projections globally, for Europe, Mediterranean and Cyprus until the end of the 21st century. It focuses on climate change effects in Cyprus by sector and presents specific recommendations on the implementation of a proper adaptation strategy. The report is based on a review of the most important recent studies on climate change, including reports from international organizations as well as European and Mediterranean authorities and research institutions. The report has also benefited from information gathered through personal communication of the authors with public authorities, non-governmental organizations and researchers.


Beyond Business-As-Usual: Achieving A Paradigm Shift Towards Low-Carbon Transport, Theodoros Zachariadis Jan 2012

Beyond Business-As-Usual: Achieving A Paradigm Shift Towards Low-Carbon Transport, Theodoros Zachariadis

Theodoros Zachariadis

Transportation is responsible for a continuously rising share of global carbon emissions. Carefully designed regulations, supported by land use strategies, fiscal policies and local incentives, and enabled through targeted international development assistance, can reverse these unsustainable trends.


Climate Change In Cyprus: Impacts And Adaptation Policies, Theodoros Zachariadis Jan 2012

Climate Change In Cyprus: Impacts And Adaptation Policies, Theodoros Zachariadis

Theodoros Zachariadis

This paper provides an overview of facts and projections related to climate change in Cyprus until the end of the 21st century. It highlights the main climate change impacts foreseen and presents recommendations for the preparation of a national adaptation strategy. Coping with climate change is possible, provided that proactive actions are taken by both the public and the private sector. Public authorities need to set clear priorities and implement well designed policies. Most importantly, adequate monitoring mechanisms should be set up in order to provide much needed data which can send early warnings to policy makers and the public …


A Simple Model To Account For Regional Inequalities In The Effectiveness Of Solar Radiation Management, Juan B. Moreno-Cruz, Katharine L. Ricke, David W. Keith Jan 2012

A Simple Model To Account For Regional Inequalities In The Effectiveness Of Solar Radiation Management, Juan B. Moreno-Cruz, Katharine L. Ricke, David W. Keith

Juan B. Moreno-Cruz

We develop a simple measure of the potential effectiveness of solar radiation management (SRM) in compensating for anthropogenic climate change and test this measure using data from an ensemble of modeling experiments conducted with a general circulation model (GCM). Assuming a linear relationship between the amounts of SRM implemented globally and the regional temperature and precipitation responses to that change, we calculate the amount of SRM that minimizes impacts using three different social objectives: egalitarian, utilitarian and ecocentric. While inequalities in the effectiveness of SRM between regions are important, they may not be as severe as is often assumed. When …


Climate Policy Under Uncertainty: A Case For Solar Geoengineering, Juan B. Moreno-Cruz, David W. Keith Jan 2012

Climate Policy Under Uncertainty: A Case For Solar Geoengineering, Juan B. Moreno-Cruz, David W. Keith

Juan B. Moreno-Cruz

It appears to be technically feasible to engineer an increase in albedo, a planetary brightening, as a means to offset the warming caused by carbon dioxide (CO2) and other greenhouse gases through Solar Radiation Management (SRM). This option has two characteristics that make it attractive for managing climate risk: it is quick and cheap. However, SRM cannot exactly compensate for the CO2-driven climate change. Moreover, SRM introduces risks in the climate system that are unique to this type of intervention.We introduce SRM in a model of climate change economics and analyze the optimal policy under uncertainty. We find that the …


Ogólnotechniczne Podstawy Biotechnologii Z Elementami Grafiki Inżynierskiej Ćw., Wojciech M. Budzianowski Jan 2012

Ogólnotechniczne Podstawy Biotechnologii Z Elementami Grafiki Inżynierskiej Ćw., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Materiały Odstresowujące, Wojciech M. Budzianowski Jan 2012

Materiały Odstresowujące, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.