A Socio-Spatial Analysis of Land Use Dynamics and Process of Land Intervention in the Peri-Urban Areas of Bahir Dar City

The contemporary urbanization and its implication to land use dynamics especially in the peri-urban areas are emerging as a cross-cutting theme in policy debates and scientific discourse. As most cities in developing countries, including Ethiopia, are experiencing continuous expansion of built-ups and dynamic land use changes, monitoring and an in-depth analysis of the past, present and future predictions of these changes are important for a holistic understanding of the problem, its consequence, and to regulate proper land use intervention options. Thus, the main objective of this research is to assess land use dynamics and processes of land intervention in the peri-urban areas of Bahir Dar city using a socio-spatial analysis. It assesses to what extent the existing peri-urban land intervention processes and land use decisions are effective in combating and controlling unwanted land use changes. Primary socio-economic data were collected using questionnaires, focus group discussions (FGDs) and key informant interviews; in addition, spatial data including Landsat and Sentinel imageries of 1993, 2001, 2011 and 2020 were utilized. Land use/land cover (LULC) classes were computed using the integration of spectral and object-based image classification techniques. The results signal that built-ups are expanding horizontally with unpredicted patterns. This is because the existing land intervention processes are lacking effectiveness to govern the spatial patterns of built-ups. The results further depict that processes of land use intervention do not only determine horizontal urban expansion but also determine the nature of people-to-land relationships, which involve both formal and informal processes. This creates haphazard, disputed and unregulated land use systems in peri-urban areas of Bahir Dar. The socio-spatial methodology applied in this research is effective in monitoring both the spatial and social dimensions of land use changes. The spatial results effectively demonstrate the dynamics of land uses; whereas, the social analysis supports understanding of the processes of land use interventions. In conclusion, monitoring processes of land use interventions are key policy and decision making directions to regulate and manage land use dynamics in the peri-urban area.

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Relationships between landslides and land use changes in the Sanbagawa and Mikabu Belts, Shikoku, Japan

Abstracts of the ICA ◽

10.5194/ica-abs-1-203-2019 ◽

2019 ◽

Vol 1 ◽

pp. 1-1

Author(s):

Roxanne Lai ◽

Takashi Oguchi

Keyword(s):

Land Use ◽

Spatial Data ◽

Landslide Susceptibility ◽

Urban Areas ◽

Land Use Changes ◽

Land Abandonment ◽

Crystalline Schist ◽

Agricultural Abandonment ◽

Landslide Kinematics

Abstract. Changing land use is an increasingly important issue as human habits, behaviors, and needs change. There has been an increase in land and agricultural abandonment in some places of the world. In Japan, movement of the population from rural to urban areas have resulted in much land and agricultural abandonment. In 2016, a land ministry survey showed that 4.1 million hectares of land in Japan had unclear ownership, with farmland making up 16.9% of the total. As vegetation cover changes after land abandonment, this temporal and spatial effect may have important effects on geomorphic processes such as landslide susceptibility and landslide kinematics.Here we track long-term land use changes over vegetated landslide areas of the Sanbagawa and Mikabu Belts of Shikoku Island, Japan. The Sanbagawa and Mikabu Belts are metamorphic belts that run across Southwest Japan, and are home to numerous large crystalline schist landslides, including the widely-studied slow but continuously moving Zentoku landslide. Villages and communities have been built on these landslide areas due to historical and cultural factors, as well as the fertility of the soil. Consequently, given the changing land uses including land abandonment in these landslide areas over time, we use long-term high-resolution land cover vegetation datasets to examine first the long-term land use changes, and then use statistical methods to explore their relationships with landslide susceptibility and kinematics. Mapping of spatial data and their analysis using GIS constitute a core part of the research. The results suggest interconnections between land use changes and land movement.

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Recent ecological trajectory of lake Taihu and land-use history reconstructed from lake sediment DNA

10.5194/egusphere-egu2020-3011 ◽

2020 ◽

Author(s):

Charline Giguet-Covex ◽

Qi Lin ◽

Ludovic Gielly ◽

Fabien Arnaud ◽

Ke Zhang

Keyword(s):

Land Use ◽

Urban Areas ◽

Trophic State ◽

Lake Taihu ◽

Rapid Development ◽

Urban Expansion ◽

Land Use Changes ◽

Lake Ecosystems ◽

Agriculture Industry ◽

Yangtze Floodplain

More than 80% of shallow lake ecosystems in the Yangtze floodplain suffer significant disturbances from the 50&#8217;s, especially eutrophication. These environmental degradations and subsequent loss of services are related with the important and rapid development of the agriculture, industry, urban areas and the population boom in the region. Lake Taihu is one of the largest lakes of the floodplain and represents an important water resource (for drinking and fishing) for the population of the two big cities on the lake shore. This lake experimented two shifts toward the degradation of the trophic state: one in the 50-60&#8217;s and a second in 80&#8217;s.In order to document the causes of these ecological shifts, we applied the DNA metabarcoding approach on lake sediments and focused on plants as proxy of land use. Whereas this proxy has been successfully applied in many lakes over the world, it has never been tested in large shallow lakes and not in China either.We show important changes in land use in 50&#8217;s and 80&#8217;s related with agricultural developments (i.e. intensification) and urban expansion, respectively.&#160;In fact, in the 50&#8217;s crop plants are increasing (rapeseed and/or cabbage, rice and/or wheat, barley and Poaceae)&#160;whereas in 80&#8217;s, we record the development of several plants associated to gardens (e.g. ornamental species). Moreover, this last period is characterised by the presence of trees mostly cultivated along stream banks to protect dikes against erosion. Between the 80&#8217;s and the years 2000, the plant diversity recorded in the sediment strongly increase, which may be due to higher detrital inputs (i.e. more efficient DNA transfer). The&#160;timing in land-use changes corresponds&#160;to the main shifts in lake trophic state.

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An Application for Regional Coastal Erosion Processes in Urban Areas: A Case Study of the Golden Horseshoe in Canada

10.32920/14639877.v1 ◽

2021 ◽

Author(s):

Eric Vaz ◽

Lisa Bowman

Keyword(s):

Land Use ◽

North America ◽

Environmental Sustainability ◽

Urban Areas ◽

Urban Expansion ◽

Land Use Changes ◽

Urban Heat Islands ◽

Anthropogenic Activity ◽

Heat Islands ◽

Erosion Processes

Urban growth has had unprecedented consequences on environmental sustainability and anthropogenic activity. The eroding coastlines throughout the world are subject to the massive expansion of urban areas and the accountability of sustainable hinterland landscapes. The Golden Horseshoe is Canada’s fastest growing region extending from the Niagara Peninsula and one of the most active economic regions in North America. This paper adopts a combined assessment of land use change and transitions in the coastal stretches of the Greater Golden Horseshoe. Comprising the urban expansion of the region between 1990 and 2011, an integrated assessment was carried out to: (i) detect changes in coastal lines along Lake Ontario; (ii) derive land use changes along the coast through spatial accounting matrices; and (iii) integrate climate change data for a combined assessment of future erosion loci. Visible erosion was found between the decade of 1990 and 2000, while certain areas have shown coastal recession in the southern region. The maximum recession was found to be 30 m, with an increasing urban sprawl of 19.8% between 1990 and 2000. A combined temperature increase of 2 °C over the coming decades brings the increase in urban heat islands leading to the importance of combined land policies to mitigate the common problem of erosion in vulnerable urban stretches and liveability concerning spatial resilience of growing urban regions in North America.

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The impact of two decades of land-use changes in potential ecosystem services supply in a Portuguese municipality - Coimbra

10.5194/egusphere-egu2020-1291 ◽

2020 ◽

Author(s):

Inês Amorim Leitão ◽

Carla Sofia Santos Ferreira ◽

António José Dinis Ferreira

Keyword(s):

Land Use ◽

Ecosystem Services ◽

Urban Areas ◽

Agricultural Land ◽

Urban Expansion ◽

Land Use Changes ◽

Qualitative Evaluation ◽

Well Being ◽

Positive Potential ◽

The Impact

Land-use changes affect the properties of ecosystems, and are typically associated with decreasing ability to supply services, which in turn causes a decrease in the social well-being. Urbanization is identified as one of the main causes of ecosystem degradation, once it is considered an artificial space that replaces natural areas.This study investigates the impact of land-use changes during 20 years (1995-2015) on the potential supply of ecosystem services in Coimbra municipality, central Portugal. The assessment was based on the evaluation performed by 31 experts familiar with the study area, through questionnaires. The experts ranked the potential supply of 31 ecosystem services, grouped in regulation, provisioning and cultural services, for the several land-uses existent. Experts performed a qualitative evaluation, considering &#8216;strong adverse potential&#8217;, &#8216;weak adverse potential&#8217;, &#8216;not relevant&#8217;, &#8216;low positive potential&#8217; and &#8216;strong positive potential&#8217;. The qualitative evaluation was converted into a quantitative classification (-2, -1, 0, 1, 2). Quantitative values were then used to develop an ecosystem services quantification matrix and to map the information in the study area, using Geographic Information Systems (GIS). An urban expansion from 14% to 18% was recorded over the last 20 years. Agricultural land decreased 8% due to conversion into forest (4% increase) and urban areas (4% increase). This has led to a decrease in the supply of provision (e.g. food) and regulation services (e.g. flood regulation). In fact, over the last years, recurrent floods have been increasingly noticed in Coimbra city. On the other hand, the growth of forest areas has led to an increase in general ESs supply. The adverse impacts of urbanization were partially compensated by enlarging the benefits provided by forest areas, which is the land-use with greatest ESs potential supply. In order to support urban planning and develop sustainable cities, it is essential to quantify the potential supply of ecosystem services considering local scale and characteristics.

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Modeling the Impact of Urbanization on Land-Use Change in Bahir Dar City, Ethiopia: An Integrated Cellular Automata–Markov Chain Approach

Land ◽

10.3390/land9040115 ◽

2020 ◽

Vol 9 (4) ◽

pp. 115 ◽

Cited By ~ 1

Author(s):

Melaku Bogale Fitawok ◽

Ben Derudder ◽

Amare Sewnet Minale ◽

Steven Van Passel ◽

Enyew Adgo ◽

...

Keyword(s):

Land Use ◽

Markov Chain ◽

Cellular Automata ◽

Urban Expansion ◽

Land Use Changes ◽

Sustainable Urban Development ◽

Bahir Dar ◽

Landsat Images ◽

The Impact ◽

The City

The fast-paced urbanization of recent decades entails that many regions are facing seemingly uncontrolled land-use changes (LUCs) that go hand in hand with a range of environmental and socio-economic challenges. In this paper, we use an integrated cellular automata–Markov chain (CA–MC) model to analyze and predict the urban expansion of and its impact on LUC in the city of Bahir Dar, Ethiopia. To this end, the research marshals high-resolution Landsat images of 1991, 2002, 2011, and 2018. An analytical hierarchy process (AHP) method is then used to identify the biophysical and socioeconomic factors underlying the expansion in the research area. It is shown that, during the period of study, built-up areas are rapidly expanding in the face of an overall decline of the farmland and vegetation cover. Drawing on a model calibration for 2018, the research predicts the possible geographies of LUC in the Bahir Dar area for 2025, 2034, and 2045. It is predicted that the conversions of other land-use types into built-up areas will persist in the southern, southwestern, and northeastern areas of the sprawling city, which can mainly be traced back to the uneven geographies of road accessibility, proximity to the city center, and slope variables. We reflect on how our findings can be used to facilitate sustainable urban development and land-use policies in the Bahir Dar area.

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An Application for Regional Coastal Erosion Processes in Urban Areas: A Case Study of the Golden Horseshoe in Canada

10.32920/14639877 ◽

2021 ◽

Author(s):

Eric Vaz ◽

Lisa Bowman

Keyword(s):

Land Use ◽

North America ◽

Environmental Sustainability ◽

Urban Areas ◽

Urban Expansion ◽

Land Use Changes ◽

Urban Heat Islands ◽

Anthropogenic Activity ◽

Heat Islands ◽

Erosion Processes

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LAND USE CHANGES IN RURAL TOWN: A CASE STUDY OF KUALA NERANG, KEDAH

PLANNING MALAYSIA JOURNAL ◽

10.21837/pm.v18i11.714 ◽

2020 ◽

Vol 18 (11) ◽

Author(s):

Abdul Ghapar Othman ◽

Nurul Hanisah Jizan

Keyword(s):

Land Use ◽

Rural Areas ◽

Urban Areas ◽

Agricultural Land ◽

Urban Expansion ◽

Land Use Changes ◽

Gis Applications ◽

Rural Town ◽

Urban And Rural Areas

Urbanization is the process of transforming a characteristically rural society into an urban one. The urban population is growing at an increasing rate while the rural population is declining, giving rise to imbalances in the development between urban and rural areas. The government’s strategy is to distribute the development to the major settlement centres in the rural areas, which are experiencing the same effects of urbanization as the urban areas in terms of changes to the use of land, especially the reduction of agricultural land and the increase in built-up areas. This study used the method of overlay in GIS applications to investigate land use changes, the speed of urban expansion and direction of development that has taken place from the period 2001 to 2018 in the town of Kuala Nerang, Kedah. This town has undergone a change in its status from a main settlement centre to a district administrative centre. Agricultural lands, which were targeted for development in the rural areas, have been converted into built-up areas. The speed of urban expansion has been slow, although some areas have recorded a higher rate. The development is moving towards the west along the main road connecting the major towns in this part of the state. The functions of the district administrative centre have influenced land use changes.

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Land use change analysis of Beykoz-Istanbul by means of satellite images and GIS

Water Science & Technology ◽

10.2166/wst.2005.0412 ◽

2005 ◽

Vol 51 (11) ◽

pp. 245-251 ◽

Cited By ~ 7

Author(s):

N. Musaoglu ◽

M. Coskun ◽

V. Kocabas

Keyword(s):

Land Use ◽

Land Use Change ◽

Spatial Data ◽

Urban Areas ◽

Land Use Changes ◽

Satellite Image ◽

Rapid Evolution ◽

Land Use Patterns ◽

Administrative District ◽

Change Analysis

Management and planning of the natural environment requires spatially accurate and timely information on land use patterns. With repetitive satellite coverage, the rapid evolution of computer technology and the integration of satellite and spatial data, the development of land use applications have become ubiquitous. The integration of Remote Sensing (RS) and Geographic Information Systems (GIS) has been widely applied and recognized as a powerful and effective tool in detecting land use change in urban areas. This paper presents the land use change analysis of the Beykoz region, which is the second largest administrative district of Istanbul. Land use changes and their impacts are monitored using Landsat (MSS – TM) and Spot 5 satellite data in the period of 1975–2001. The independent classification of each satellite image was used as a change analysis method and the resulting images were analyzed with GIS techniques. The results showed that forest area of Beykoz decreased from 80.55% to 70.5% between 1975 and 1984 and during the 1984–2001 periods, the forested area decreased from 70.5% to 68.86% and the urban growth rate was 4.65%.

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Quantitative Influence of Land-Use Changes and Urban Expansion Intensity on Landscape Pattern in Qingdao, China: Implications for Urban Sustainability

Sustainability ◽

10.3390/su11216174 ◽

2019 ◽

Vol 11 (21) ◽

pp. 6174 ◽

Cited By ~ 8

Author(s):

Jinming Yang ◽

Shimei Li ◽

Huicui Lu

Keyword(s):

Land Use ◽

Landscape Pattern ◽

Urban Areas ◽

Urban Expansion ◽

Land Use Changes ◽

Urban Sustainability ◽

Urban Ecosystems ◽

Landscape Patterns ◽

Plain Area ◽

Suburban Areas

The spatial structure and configuration of land-use patches, i.e., landscape patterns could affect the flow of energy and materials in inner-urban ecosystems, and hence the sustainable development of urban areas. Studying landscape pattern changes under the process of urbanization would have implicational significance to urban planning and urban sustainability. In this paper, land-use change and urban expansion intensity (UEI) were treated as the inducement factors for changes in landscape patterns, and stepwise regression and geographically weighted regression (GWR) were adapted to quantify their integrated and distributed magnitude effects on landscape patterns, respectively. The findings suggested that land-uses have different contributions to changes in landscape patterns at different urban development zones (downtown, suburban plain area and mountainous suburban areas). Furthermore, the GWR analysis results indicated that the effect of UEI on landscape patterns has spatial and temporal heterogeneity. From 1987 to 2000, the UEI had great explanatory capacity on changes in landscape patterns and helped the landscape assemble faster in the downtown and adjacent areas. However, with the shifting of the center of urban construction from downtown to the suburbs, the high explanatory ability was oriented towards suburban areas during 2000–2016 and the magnitude of influence spatially changed. Therefore, a compact city and protection policy should be adapted to different regions in the study area to achieve strong urban sustainability.

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