ANALYSIS of URBAN SPRAWL and ITS EFFECT in MARARABA, KARU LOCAL GOVERNMENT AREA of NASARAWA STATE, NIGERIA Joy N
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International Journal of Scientific & Engineering Research Volume 10, Issue 12, December-2019 ISSN 2229-5518 611 ANALYSIS OF URBAN SPRAWL AND ITS EFFECT IN MARARABA, KARU LOCAL GOVERNMENT AREA OF NASARAWA STATE, NIGERIA Joy N. Nnamoko, Acha Sunday and Isaiah Sule Department of Geography, Federal University of Technology Minna Correspondence to: Joy Nzube Nnamoko ([email protected]) Abstract Cities and towns in developing countries all over the world are experiencing an unplanned and uncontrolled development known as Urban sprawl. Sprawl is often uncoordinated and extends along the fringes of metropolitan areas with incredible speed. This research is aimed at examining urban sprawl in Mararaba between 1998 and 2018.The data used for the study were Landsat 5 Thematic Mapper (TM) of 1998, Landsat Enhanced Thematic Mapper plus (ETM+) data of 2008 and operational land imager of 2018.The extent of urban land use was determined by using the attribute and statistics data generated from the classification result and used for post-classification comparison among the years. Result showed that Mararaba witnessed a remarkable growth between 1998 and 2018 from mere 1.1178 Km2 in 1998 to about 5.8716 Km2 in 2018. This growth contributed to the sharp decline in farmland from 4.0545 km2 (48.27%) in 1998 to decline to 1.0512 km2 (12.51%) in 2018. Bare surfaces witnessed an increase over the years of this study. This increase is as a result of clearing of natural vegetation for urban development, thereby exposing the land to direct contact with rainfall, leading to gully erosion in the area. Light vegetation also witnessed a sharp decreased from (6.23%) in 1998 to (13.99%) in 2018. Therefore, increase in population led to the increase in urban sprawl in the study area. The study recommends that there is a need for a regular monitoring of urban sprawl and development in the study area by the state government especially with the aid of geospatial techniques for better decision making Keywords: Cities,IJSER Urbanization, Urban Sprawl, Land-use/Cover, Population, Change, GIS 1. Introduction Latin America and Asia. In fact, the world Cities and towns in developing countries are has urbanized faster than originally predicted experiencing rapid population growth and by Malthus (1978). Urbanization is the uncontrolled development known as urban increasing number of people in urban areas sprawl. For the first time in history the urban resulting to the development of towns and population of the world has outnumbered the cities. This is usually as a result of the rural population (Chunwate et al., 2019). movement of people from rural to urban areas This epochal transition occurred mostly in leading to population growth in towns and Africa and other developing countries of cities (Isma’il et al., 2015). Urbanization is not only characterized by demographic change but involves social geographical factors and therefore vary from change, technological advancement and one geographical location to another. economic transformation. These changes are influenced by social, political and IJSER © 2019 http://www.ijser.org International Journal of Scientific & Engineering Research Volume 10, Issue 12, December-2019 ISSN 2229-5518 612 Sprawl takes place either in radial direction developments and extended places (Rikko, around a well-established city or linearly 2013) along highways (Torrens, 2006). Patterns of The study on urban environmental issues sprawl and analyses of spatial and temporal using remote sensing and GIS techniques in changes could be done through various India, indicated major urban environmental methods. The Mapping process provides a problems that occur due to high population “picture” of where this type of growth is growth (the 46.31% increase during 1991- occurring, which helps to identify the 2001). Also, the uncontrolled and environmental and natural resources mismanaged urban expansion has led to the threatened by such sprawls, and to suggest doubling of the densely built-up area during the likely future directions and patterns of the last decade in Delhi (Atiqur, Maik, Alka, sprawling growth. The effects of sprawl on and Javed, 2009) agricultural land use and other land uses such as residential, commercial, industrial and All cities in Nigeria are experiencing sprawl; institutional are other concerns that are Awka metropolis is not an exception because dependent on the mapping and study of the of the scale and type of development on some sprawl process. Ultimately, the power to of the city’s most agriculturally productive manage sprawl resides with local government land. In the past decade, the city’s built up authorities that are saddled with the area burst outward in an explosion of sprawl responsibility of urban developmental that consumed former agricultural land at a control (Chunwate et al., 2019). break-neck pace (Lazarus, 2012) . Urban sprawl is often uncoordinated and Hashidu and Muhammed, 2018) Analysis of extends along the fringes of metropolitan urban sprawl using geospatial techniques in areas with incredibleIJSER speed. Commonly, this Gombe metropolis, Gombe State, Nigeria. uncoordinated development encroaches Result reveals that the spatial extent of urban agricultural and resource land uses in the sprawl occupied about 12.78% between 1991 process. Land is often developed in a and 2014 and high annual rate of 12.78% fragmented and piecemeal fashion, with were also witnessed in 2014. It was also much of the intervening space left vacant or found that there was a progressive increase of in uses with little functionality (Torrens and urban sprawl both in terms of extent and Alberti, 2002). annual rate throughout the study period, especially between the period of 2005 and Sprawl in Nigeria consists of informal 2014. It is recommended that there is a need housing developments on the urban for a regular monitoring of urban sprawl and periphery, on land that is mostly privately development in the study area by the state owned, sold in single small plots. These government especially with the aid of newly developed areas have been called peri- geospatial techniques for better decision urban areas and the inter-metropolitan making. periphery, The ex-urban areas beyond the suburbs are sometimes called fringe IJSER © 2019 http://www.ijser.org International Journal of Scientific & Engineering Research Volume 10, Issue 12, December-2019 ISSN 2229-5518 613 Similarly, (Kanayochukwu and Dogo, 2019) decision making and thereby, to enhance examined urban growth and housing sustainable development. problems in Karu Local Government Area of 2. Materials and Methods Nasarawa State in Nigeria. Questionnaire survey was used to acquire primary data Karu Local Government Area of Nasarawa which was complemented with secondary State is located between latitudes 8° 5’ N and data. Findings revealed a strong correlation 10° 42’ N and longitudes9° 25’E and 7° 54’E between urban growth and housing problems of the Greenwich Meridian while Mararaba in the area. The study also identified housing is located between latitudes 7° 34’ 40’’ N and problems such as overcrowding and 7° 37’ 00’’N and longitudes 9° 0’ 30’’ E and congestion, poor accessibility, substandard 9° 2’ 00’’E of the Greenwich Meridian as and inadequate housing, as well as shown in Figure 1. Mararaba is an unplanned insufficient basic amenities and area covering a spatial extent of about infrastructural facilities in the area as a result 800sqkm (KAPDA, 2001). It extends from of its close proximity to FCT. Hence there is the eastern boundary of the Federal Capital a need to examine the effect, nature and the Territory Abuja (Old Nyanya) to Gora about pattern of sprawl in the area, for proper 15 kilometers to Kefi as shown in Figure 1. IJSER Figure 4.1: Map of the Study Area The area has an estimated population of other parts of the country to this area (Yari et 10,000 in 1991, and is believed to have grown al., 2002; Isma’il et al., 2015 ) rapidly to an estimated population of 50,000 Mararaba is located within a broad gentle and 130,000 by 2001 and 2010 respectively; rolling undulating plain with elevation due to continuous migration of people from ranging from 300 to 500 meters above sea. IJSER © 2019 http://www.ijser.org International Journal of Scientific & Engineering Research Volume 10, Issue 12, December-2019 ISSN 2229-5518 614 The soils derived from this bedrock structure classify the land use and land cover of the are generally deep and well drained with high study area. Results were summarized in fertility rating and variable run-off potential, tables, figures and were discussed using with variations mainly along the stream-beds descriptive statistics. where the soils are higher in clay content After the images were geo-referenced and (Yari et al., 2002). The natural vegetation in geometrically rectified, Image clipping was the area is of the park savannah type, performed using spatial analyst tool on a sub- featuring dense tropical woodland with scene from the full image on the basis of a shrubs and grasses; with variations reflecting frame covering the area of the study. These the influence of local conditions such as preprocessing tasks allowed the export of the relief, soil, and recently the effect of human satellite images to the ArcGIS and ERDAS activities. The area has two distinct seasons for classification and extraction of land use (wet and dry), typical of north-central and land cover information. Supervised Nigeria. The spatial pattern of rainfall in the classification was performed on the same study area is slightly influenced by the north images, with random training samples using central highlands with a mean annual rainfall on-screen digitizing from on the standard between 1100mm to about 2000mm. menu of the software; Land cover types Mararaba is cosmopolitan in nature with classification and identification were various ethnic groups living together in performed.