Landuse Change Analysis of Etiosa Local Government Area of Lagos State Nigeria, from 2004 to 2010
Leonard Michael Onyinyechi Aminigbo
Issue:
Volume 5, Issue 2, June 2021
Pages:
21-27
Received:
22 June 2020
Accepted:
14 December 2020
Published:
30 April 2021
Abstract: The results and information obtained from analysis in this study using Satellite Imagery and Geospatial techniques has shown that it is possible to effectively monitor the changing landuse trends and patterns and other developments within the study area over the years. Desired analyses and inferences were also carried to achieve specific goals. It also demonstrated the type and extent of land use or land cover at various times within the study area. The application of satellite imagery is a useful method for the fast collection of information to assess the dynamic changes of natural objects, natural resources and of the earth surface in general. GIS will continue to be a valuable tool when decisions must be made quickly and lives are to be affected. Therefore, well informed investments in the establishment and running of satellite ground stations and the GIS technology can only be a rewarding enterprise, now and in the future. It is obvious at a glance to see that Eti-osa Local Government has undergone a series of change in Land use and land cover area within the past few years. Though economically viable, it however raises environmental concerns on its effect on the ecosystem, drainage and vegetation of that area. The result as shown on the satellite images for those two periods has demonstrated a drastic change in the distribution of the three main features which we studied i.e Built-up area, Undeveloped area and water bodies with the quota of built up area going higher. This can be seen as a high rise in the state of urbanization as witnessed in other cities around the world. From the charts plotted for the varying landuse types and its percentage coverage, it is noticed that the undeveloped land mass has decreased with an increase in built up area. This is attributed to the increase in development (the built up areas) and an increase in commercial activities over the years leading to a continuous decrease in the undeveloped area. The water bodies too are affected as there is massive land reclamation and sand filling projects going on around the local government.
Abstract: The results and information obtained from analysis in this study using Satellite Imagery and Geospatial techniques has shown that it is possible to effectively monitor the changing landuse trends and patterns and other developments within the study area over the years. Desired analyses and inferences were also carried to achieve specific goals. It ...
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Morphological Transformation of Gulshan Area: Cause and Effects
Sanjida Ahmed Sinthia,
Zishan Fuad Choudhury
Issue:
Volume 5, Issue 2, June 2021
Pages:
28-34
Received:
26 November 2020
Accepted:
22 December 2020
Published:
8 May 2021
Abstract: Cities are vigorous in nature. It has a habit of grow and change depending on its interface among diverse social, economic and political environment. It is the common nature of cities to embrace changes with time which create entirely new kinds of fabric and with this the basics of urban form have changed a lot. The city of Dhaka has its long history since 17th century which had experienced dramatic changes over the last few decades. Over the time, Plots, low lands and water body and open spaces have been transformed into different developed areas. It has been grown in a natural way without any rigid planning proposal although it has some parts deliberately designed by the city authority for residential purpose. As a result, the growing city seems to have exhibited a series of organic and formal spatial pattern at the same time. Furthermore, to meet the demand of increasing residents the city has stretched in diverse parts, shifted its core and formed new urban activities. As a result, single family house plot has been transformed into multi-layer residential unit and in some parts of the city the residential plots have been converted into commercial purpose which is the consequences of the transformation process. Logically, it has become a vital to articulate Detailed Area Plan for Dhaka and this bold decision by RAJUK may prove to be constructive for the city in the long run. Therefore, this paper aims to investigate the cause and effect of social, functional and spatial changes of the residential area of Gulshan area, Dhaka due to morphological transformation of plot and land use pattern for various reasons. As well as to explore how the development control planning organizations involvement can mitigate the situations.
Abstract: Cities are vigorous in nature. It has a habit of grow and change depending on its interface among diverse social, economic and political environment. It is the common nature of cities to embrace changes with time which create entirely new kinds of fabric and with this the basics of urban form have changed a lot. The city of Dhaka has its long histo...
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Distribution of Natural and Anthropogenic Sources, and Mapping of As, Co, and Hg by Three Ecological Risk Indices in the Mid-continent of the USA
Almesleh Najwah Alssaeidi Ahmed,
Philip Goodell,
Ziwu Felix Dziedzorm,
Kappus Eric
Issue:
Volume 5, Issue 2, June 2021
Pages:
35-52
Received:
2 May 2021
Accepted:
28 May 2021
Published:
9 July 2021
Abstract: Three indicators are employed including the Enrichment factor (EF), geoaccumulation (I geo), and potential ecological risk assessment (PERI) to measure the degree of contamination of As, Co, and Hg in soils. The objective of this investigation is to evaluate the concentration of As, Co, and Hg in the soils of Iowa (IA), Kansas (KS), and Nebraska (NE). Study of the spatial distribution of chemicals was carried out as part of the investigation, which leads to the suggestion of the potential source of the elements. EF, I geo and PERI indexes, As and Co contain minimal enrichment, and Hg is high. EF of As and Hg are similarly classified with minimal contamination as well as EF of Co in NE. EF can be ordered Hg > As > Co. PERI values of As and Co are classified as a low risk. PERI values of Hg are higher than As and Co. I geo values of As and Co indicate uncontaminated to moderately contaminated soil. I geo of Hg is highest of three chemicals order Hg > As > Co. However, I geo degree of As is approximately similar in the three states and it is higher than Co, which indicate as uncontaminated to moderately contaminated. PERI show serious ecological risk pollution of Hg in the soils. These investigations indicate minimal to moderate soil contamination with As and Co in the three states. The spatial distribution is widespread and continuous. Point source maps are compared with this present product. The nature of the spatial distribution correlates with the major human activity on the land, agriculture. The As, Co, and Hg chemistry of the soil is due to the intense fertilization that accompanies such successful agriculture, which originates from anthropogenic sources that require continuous monitoring.
Abstract: Three indicators are employed including the Enrichment factor (EF), geoaccumulation (I geo), and potential ecological risk assessment (PERI) to measure the degree of contamination of As, Co, and Hg in soils. The objective of this investigation is to evaluate the concentration of As, Co, and Hg in the soils of Iowa (IA), Kansas (KS), and Nebraska (N...
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