Abstract
Urban Land suitability assessment is an important fundamental work in urban land development. Land suitability assessment, in the context of land use planning, is a bridging phase linking land resources assessment to any land use decision-making process. This study demonstrates the use of Geographic Information System (GIS) tools and numerical Multi-Criteria Evaluation (MCE) techniques for selection of suitable sites for urban development of a Sodo Town and surrounding area. Six factors (land use, road proximity, soil type, river proximity, geomorphology and slope) were identified for criteria evaluation. Weights for each criterion are generated by comparing with each other according to their importance. Criteria weights was develop by employing GIS based Multi-Criteria Decision Analysis (MCDA) such as Analytical Hierarchy Process (AHP) for evaluating the suitability of the urban land site selection. Pair wise comparison matrix indicates weights for land use (=0.3729), road proximity (=0.1440), soil type (=0.1826), river proximity (=0.0714), geomorphology (=0.1777) and slope (=0.0514). Consistency Ratio, (CR =0.01) <0.10 indicated a reasonable level of consistency in the pair wise comparisons. After the final suitability analysis map was obtained from weighted overlay in Arc GIS Spatial Analyst Tools; it was found that from the available area 19.234sq km falls under low suitable, 4.579sq. km under moderately suitable and 5.048sq. km under high suitable. The result shows that highly suitable areas for urban development is agricultural land and open forest. Keywords: Urban Land suitability, Geographic Information System (GIS); Remote Sensing (RS); Multi-criteria Evaluation (MCE); Analytic Hierarchy Process (AHP); Spatial Analysis tool. DOI : 10.7176/JEES/9-5-01 Publication date :May 31 st 2019
Highlights
Urban land as a part of the earth’s surface has reasonably stable or predictable repeated activity and its suitability for agriculture, settlement and industry depends on its elements [2]
Many of GIS-based land suitability analysis approaches such as Boolean overlay and modelling for land suitability analysis lack a well-defined mechanism for incorporating the decision-maker’s preferences into the Geographic Information System (GIS) procedures. This may be solved by integrating GIS and Multi Criteria Evaluation (MCE) methods [3]
1.1 Objective The main objective was to identify land that is suitable for urban development based on remote sensing and GIS based multicriteria evaluation technique in Wolaita Sodo Town and surrounding area. 1.1.1 Specific objectives of the study: To develop physical land suitability map
Summary
Urban land as a part of the earth’s surface has reasonably stable or predictable repeated activity and its suitability for agriculture, settlement and industry depends on its elements [2]. Due to the increasing population and economic growth, human activities have continuous impacts on land use Those impacts might lead to a series complexities toward environment and land resources development [1]. Many of GIS-based land suitability analysis approaches such as Boolean overlay and modelling for land suitability analysis lack a well-defined mechanism for incorporating the decision-maker’s preferences into the Geographic Information System (GIS) procedures This may be solved by integrating GIS and Multi Criteria Evaluation (MCE) methods [3]. 1.1 Objective The main objective was to identify land that is suitable for urban development based on remote sensing and GIS based multicriteria evaluation technique in Wolaita Sodo Town and surrounding area. The Town is located in the strategic place for the southern Ethiopia at the center and it has 6 outlets which are connect the north, south, east and west areas
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