The Impacts of Urbanization-induced Land Use and Land Cover Change on Land Surface Temperature and Thermal Comfort. The Case of Dire Dawa, Ethiopia

Masterarbeit , 2023 , 99 Seiten , Note: Very Good

Raumwissenschaften, Stadt- und Raumplanung

This study was focused on assessing an "Implications of Urbanization-Induced Land Use Land Cover Changes on Land Surface Temperature and Thermal Comfort in Dire Dawa City between 2000 and 2022". The City is experiencing rapid urbanization, and limitation of green area aesthetical values that has resulted in remarkable surface temperature. Despite this, until now, no evaluations have been duly executed pertaining to the thermal or ecological factors in Dire Dawa.

The study utilized Landsat 5 (TM), Landsat 9 (OIL/TIRS) and MODIS 11A2 images which were obtained from USGS for the study area. To analyze and show results clearly, ArcGIS 10.8, ERDAS IMAGINE 2014, and Excel 2013 softwares were used. The LULC pattern was processed by supervised classification with the maximum likelihood classification algorithm and four major land use land cover (Built-up area, Barren land, Shrub land, and sparse vegetation) were identified.

The biggest urban problem facing cities around the world today is the result of land use change induced by urbanization. Rapid urbanization, driven by demographic and economic growth, places additional demands on natural resources, leading to changes in land use, particularly in megacities. Due to urbanization and unplanned human activities, the vegetation of the earth's surface is in constant decline, leading to changes in the environment, especially in the earth's ecosystem at local, regional and global scales. Future increases in climate change and urbanization will exacerbate urban heat islands, especially during heatwaves.

Similar to any other cities across the world, different urban areas in Ethiopia are affected by climate change. Dire Dawa city has experienced massive urbanization in terms of population growth, fastest rates of urbanization with a 50 percent growth rate and major changes in the LULC has been a drastic increase in areal extent and coverage. Additionally observed surface improvements such as urban growth, settlement expansion and Construction of new built up or dwelling units in the city, socioeconomic factors, particularly in the context of anthropogenic activities have modified and will continue to modify the case study's microclimate. Despite variations among kebeles, Dire Dawa has population density of 350 people per square kilometer and a growth rate of 4.42 %. As a result, such increasing changes are responsible for increasing surface temperatures, can cause and pose a threat to the city's microclimate.

Inhaltsverzeichnis (Table of Contents)

• CHAPTER I: INTRODUCTION
• 1.1. Background of the Study
• 1.2. Statement of the Problem
• 1.3. Objectives
• 1.3.1. General Objective
• 1.3.2. Specific Objectives
• 1.4. Research Questions
• 1.5. Significance of the Study
• 1.6. Delimitation Scope
• 1.7. Limitations of the study
• 1.8. Operational Definitions
• 1.9. Organization of the study
• CHAPTER II: LITERATURE REVIEW
• 2.1. Theoretical Framework
• 2.1.1. Normalized Difference Vegetation Index
• 2.1.2. Land Surface Temperature
• 2.1.3. Urban Thermal Comfort
• 2.1.4. Normalized Difference Built-Up Index
• 2.1.5. Land Use Land Cover classification theory
• 2.2. Empirical Framework
• 2.2.1. Global perspectives
• 2.2.2. Local perspectives
• 2.2.3. Research and knowledge gaps
• 2.3. Conceptual Framework
• CHAPTER III: MATERIALS AND METHODS
• 3.1. Description of the Study Area
• 3.1.1. Geographic Location
• 3.1.2. Topography
• 3.1.3. Population
• 3.1.4. Economy
• 3.1.5. Climate
• 3.2. Research design
• 3.3. Research Approach
• 3.4. Sampling Technique
• 3.5. Types and Sources of Data
• 3.5.1. Primary Data Sources
• 3.5.2. Secondary Data Sources
• 3.6. Methods of data collection
• 3.7. Materials and software’s
• 3.8. Methods of Data Analysis
• 3.8.1. Land Use Land Cover Classification
• 3.8.2. LULC Classification Accuracy Assessment
• 3.8.3. Land-use Land-cover change detection
• 3.8.4. Vegetation Abundance Analysis through NDVI
• 3.8.5. Land Surface Temperature Analysis
• 3.8.6. Thermal Comfort Assessment through UTFVI
• 3.9. Statistical Analysis
• 3. 10. Methodological Workflow
• CHAPTER IV: RESULTS AND DISCUSSIONS
• 4.1. Introduction
• 4.2. Analysis of LULC Classification
• 4.2.1. Spatio-Temporal Analysis of LULC
• 4.2.2. LULC Area Statistical Analysis
• 4.2.3. LULC Classification Accuracy Assessment
• 4.3. Vegetation Abundance Analysis through NDVI
• 4.4. Distribution of LST and its responses to LULC types
• 4.5. Relationship of LST with Vegetation and Built-up Area
• 4.5.1. Evaluation of Land Surface Temperature by MODIS 11A2
• 4.6. Thermal Comfort Assessment through UTFVI
• 4.7. Major Findings of The Study
• CHAPTER V: CONCLUSION AND RECOMMENDATION
• 5.1. Conclusion
• 5.2. Recommendation
• 5.3. Suggestions for Future Studies
• REFERENCES
• APPENDIXES

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

The main objective of this study is to assess the impacts of urbanization-induced land use land cover changes on land surface temperature and thermal comfort in Dire Dawa City, Ethiopia, using seasonal and temporal data from 2000 to 2022. The research explores the correlation between land use land cover changes, land surface temperature, and urban thermal comfort levels. This analysis aims to inform urban planning and development strategies that address the challenges of urbanization-induced environmental changes.

• Land use and land cover change dynamics in Dire Dawa City
• The impact of land use and land cover change on land surface temperature
• The relationship between land surface temperature and vegetation cover
• The relationship between land surface temperature and built-up areas
• The evaluation of thermal comfort levels in Dire Dawa City

Zusammenfassung der Kapitel (Chapter Summaries)

Chapter I: Introduction

This chapter provides an introduction to the study, including background information, the statement of the problem, research questions, objectives, scope, and limitations of the study. It also defines key terms used in the study, such as urbanization, population growth, land cover, land use, land use and land cover change, and land surface temperature.

Chapter II: Literature Review

This chapter presents a comprehensive review of existing literature related to the impacts of urbanization-induced land use and land cover changes on land surface temperature and thermal comfort. It examines global and local perspectives on this topic, highlighting key theoretical frameworks and empirical findings. The chapter also identifies research gaps and knowledge gaps that this study aims to address.

Chapter III: Materials and Methods

This chapter outlines the methodology employed in the study, including the study area, research design, research approach, data sources, data collection methods, and data analysis techniques. It also provides information about the specific software used for data processing and analysis.

Chapter IV: Results and Discussions

This chapter presents the results of the study and discusses their implications. It analyzes land use and land cover changes, land surface temperature variations, and thermal comfort levels in Dire Dawa City over the study period. The chapter also examines the relationships between land surface temperature, vegetation cover, and built-up areas.

Schlüsselwörter (Keywords)

The key focus of this study revolves around the environmental impacts of urbanization in Dire Dawa City, Ethiopia. Specifically, it investigates the relationships between urbanization, land surface temperature, thermal comfort, and land use and land cover changes. The study employs various indices like NDVI and UTFVI to quantify these relationships. The study also employs remote sensing technologies to analyze satellite imagery and map the spatial distribution of these key variables. These findings provide insights into sustainable urban planning and development strategies to mitigate the adverse effects of urbanization on the environment and human well-being.

• Veranstaltung: Geo-Informatics Engineering
• Note: Very Good
• Autor: Ermias Belete (Autor:in)
• Erscheinungsjahr: 2023
• Seiten: 99
• Katalognummer: V1435939
• ISBN (PDF): 9783346989550
• ISBN (Buch): 9783346989567
• Sprache: Englisch
• Schlagworte: impacts, urbanization-induced, land, cover, change, surface, temperature, thermal, comfort, case, dire, dawa, ethiopia