Remote Sensing based Land Use/Land CoveChange Detection: A Case Study of East Twente, Netherlands
Solomon Mulat*
Ethiopian Environment and Forest Research Institute, Ethiopia
Submission: March 02, 2020; Published: March 12, 2020
*Corresponding author: Solomon Mulat, Ethiopian Environment and Forest Research Institute, Ethiopia
How to cite this article: Solomon Mulat. Remote Sensing based Land Use/Land Cover Change Detection: A Case Study of East Twente, Netherlands . Int J Environ Sci Nat Res. 2020; 23(5): 556124. DOI: 10.19080/IJESNR.2020.23.556124
Abstract
Land use land cover change analysis has become an important element in the development of strategies for natural and environmental resource management. The main aim of this case study was to demonstrate the land use land cover changes that happened between 2002 and 2010 in the eastern Twente, the Netherlands. The study used Spot and Landsat TM images for the study period of 2002 and 2010 respectively. Pixel-based supervised image classification technique was used for classification of images. Post classification technique was implemented to analyze the changes occurred between the different land cover types over the study period. The result of the post classification comparison method showed that the major change consisted of agriculture and nature conservation areas changed into built up areas. The result demonstrated that a high reduction in conservation and agriculture area coverage with reduction percentage of 26.12% and 16.62% were happened between the study periods respectively. On the other land, Built-Up area cover has increased by 60.48% between the year 2002 and 2010 study periods. This study informs the need to tackle the expansion of residential areas through careful spatial planning and design future appropriate land management options.
Keywords: Environmental resource; Sustainable utilization; Land use land cover changes; Natural disasters; Atmospheric variation
Introduction
Land use land cover changes have an impact on the composition of the atmosphere which results in the change of climate and whether conditions at local and global level [1]. It has become an important element in the development of strategies for natural and environmental resource management [2]. It also affects the biological diversity, change ecosystem services, soil erosions and results in natural disasters [3]. The land use land cover changes are mainly triggered by natural disasters and human activities [4]. This implies that it needs attention on monitoring of the earth’s resources for sustainable utilization and management of the resources. Land use land cover changes analysis provides information to understand the complex causes and interactions among the earths resource at local and global level [5].
Because of the higher pressure on natural resource utilization in the world, land use and land cover change detection has become a central point in the current strategies for managing natural resources and monitoring environmental changes [6]. These changes amend the availability of different resources including soil, vegetation, water, animal feed and others. Therefore, land use and cover changes could lead to a decreased availability of different resources and services for human, livestock, agricultural production and damage to the environment as well [7]. Currently, demand of land in the Netherlands become higher due to expansion of residential and industrial areas in the country. However, food production and nature resource conservation also require land area, and this needs careful planning for sustainable utilization of the resources in the country.
Land use land cover change analysis studies focused on a specific location has been proved to be important for designing sustainable management approaches and decision-making process related to the use and management of the resources [8,9]. Remote sensing technologies has been played important role in land use land cover change detection since its shows the spatial patterns of the dynamics of the land covers types over a large area [10,11]. The availability of remote sensing data in digital format has attracted researchers to use it in wide range of applications. Thus, remote sensing has become an important data for tracking changes of land use land cover types over a long period of time because of its continuous spatial and temporal coverage [12,13].
For effective resource planning and sustainable utilization in the future, land use land cover change detection by incorporating new approaches and taking the modern advanced technology of GIS and earth observation are needed for better understanding of the evolving process through time [14]. Therefore, the aim of this study is to detect the land use land cover changes evolve from 2002 to 2010 by giving a special emphasis on areas changed from agriculture and nature conservation to build up areas in the study area.
Material and Methods
Study area
The study was conducted in Twente, Netherlands, which is geographically situated on in the province of Overijssel within 52°05´ to 52°27´ N and 6°05´ to 7°00´ E. The area of the region is approximately 1374km2. Twente comprises fourteen municipalities. This study focused on the eastern part of Twente. The area has a temperate climate characteristic with mild winters and cold summers. The average temperature varies between 2.2°C in winter to 16.6°C in summer season. The average annual rainfall of the area reaches to 916.5mm per year. The region is predominantly flat with low lying terrain and covered with mixed oak forests, heath, grasses and crops. The region is dominated by agriculture practice which includes daily farming, livestock production and arable farming. The arable farming in the region is mainly used corn production which is a very demanding crop in the study area [15].
Datasets
In this study, various data sources were used for change detection analysis. Landsat and Spot images were the main data source for image classification and change detection analysis. In addition, auxiliary data such as field data and topographic map of the six municipalities in the region were used in the analysis. The available dataset was organized in proper manner and made ready for analysis. Five of the topographic maps were reprojected to the Dutch coordinate system and three of them were georeferenced. The Landsat image were converted to the same coordinate system (i.e. Dutch coordinate system) and the Spot image were georeferenced by using the topographic maps and converted to Dutch coordinate system.
Methods
Image classification
ERDAS IMAGINE 2015 software package was used for image processing and classification of the image. Pixel-based supervised maximum likelihood classification method was used to classify images of the year 2002 and 2010 separately. Images of each study years were classified independently. The classification has been done by assigning the different spectral signatures from the satellite image to the different land use land cover classes. Different band combinations were used to identify the different land use land cover types since the image shows a different color in different band combination. The supervised image classification was supplemented with visual interpretation to improve the classification accuracy and reduce misclassification. The result of the supervised classification method provided a thematic raster layer of the different land use land cover classes. Spot and Landsat satellite images for the year 2002 and 2010 from the study area were used for classification. The image was classified into three main land use classes (i.e. built up areas, agricultural and nature conservation areas) for easier change detection comparison. Then, the classified Spot image has been resampled to the same cell size of the Landsat image for further processing and compared the classified images in each other. The accuracy assessment was done for both classified images of Landsat and Spot image. A total of 84 and 92 GPS points were used for classification and validation of the classified image of Spot and Landsat image respectively. Post classification analysis
In order to analyze the land use land cover changes occurred between the years 2002 to 2010, the post classification detection technique was employed. The post-classification technique was selected since it reduces the impact of atmospheric variation, environmental differences and sensor difference between multitemporal images [16]. Image of the different years were classified separately. The post classification change detection was done by using ERDAS Matrix union function. The classified images of the year 2002 and 2010 were compared. The comparison was performed by computing the image value of the year 2002 with the corresponding value of the year 2010 image. The result summarized in the form of a table that shows the overall changes per hectare per each land use land cover class. The positive value indicates an increase in the area of the land use land cover whereas the negative values indicate a decrease in the area of the land use land cover class in the study period.
Result and Discussion
Classification accuracy assessment
Accuracy assessment of the classified image has been performed to evaluate to what extent the classified image matched with the reality on the ground. The accuracy assessment has been done for both classified images. The overall accuracy for the year 2002 and 2010 were 76.5% and 65.2% using three land use land cover classes. Confusion among the different land use land cover types were observed during the classification of the image. The confusion among the land use land cover types reduced the classification accuracy of the images. High confusion among land use land cover types and lower classification accuracy was observed in the Landsat image. This confusion and lower classification accuracy were associated with the lower spatial resolution of the Landsat image used in the study [11,17]. The area covered by each class also calculated and presented as bellow (Table 1).
Land covers change detection
A total of three main land use land cover classes were identified and extracted for the years 2002 and 2010 of the study area (Figure 2). At the initial year of the study period (2002), Nature conservation areas was the dominate land use land cover type that accounts 45.30% followed by agricultural (27.57%) and built-up areas (27.57%) (Table 1). As the result of the land cover change detection showed that most of the lands (i.e. agricultural and nature conservation areas) are changed into built up areas. However, there is a little change from agricultural to nature conservation areas in the region. The red colors on Figure 2 in the land cover map showed the negative changes that occurred in the region which leads the regions in a serious shortage of land for agricultural production as well as nature conservation purpose Figure 2. The area coverage for each land use class for the year 2002 and 2010 is presented as follow in Table 1.
Table 1, along with Figure 1, summarizes the trends of the identified land use land cover types from 2002 to 2010 with the percentage share of each land cover classes. The trend of land use land cover changes was observed for all land use land cover types in 2010. By the end of the study period, 2010, Built-Up area was the dominant land cover which accounts 43.55% followed by Conservation area (33.47%) and Agricultural Land (22.98%) (Table 1).
Moreover, Table 2 along with Figure 2, demonstrated the pattern of the land use land cover dynamics during the study period of 2002 and 2010. The result of the study demonstrated that there was a change of land use land cover types in both positive and negative direction. As it has seen in Table 2, Built-Up area has showed an increase trend with 60.48% between the study periods of 2002- 2010 in the study area. However, conservation area and agriculture has showed a declined trend with a rate of 26.12% and 16.62% respectively with the study period (Table 2). Both Conservation and Agricultural land has showed a rapid reduction trend with different rate of change over the study period.
The change result of the study showed an increase in the expansion of built-up areas in the expense of other land use land cover types. The total built-up area converted between the study periods covered 9,929.61ha which accounts 60.48%.
Discussion
The spatial distribution of land use and its patterns of change are prerequisite to design and develop effective and efficient land use policies related to the use and management of the resources. The study utilized remote sensing data available for the study period to describe the pattern of the land use land cover dynamics in the eastern Twente, the Netherlands. The result of the study provided information on the spatial distribution and patterns of changes of the different land use land cover types within the study period. The result of the study showed that conservation and agricultural areas were highly converted to Built-Up area. The reduction of these resources contributes to the expansion of built-up areas. Built-Up area has showed a rapid increment between 2002 and 2010 with the expenses of the other land use land cover types in the area. This indicated that there is very high population increment that demands of areas for residential area in the study area.
Eastern Twente has experienced rapid dynamics of land use land cover due the expansion of built-up areas in the area. Within the study period, built-up area was the most dynamic land use land cover type. Built-up areas have increased from 16,416.80ha in 2002 to 26,346.41ha in 2010. The rapid expansion of builtup areas within the study period was due to the conversion of conservation and agriculture land in the area. Reduction of agricultural lands due to the expansion of urban areas is a common phenomenon throughout the world. For instance, the study of [18] revealed that built-up area has showed an increment of 17% between the study period 1997 and 2008.
The rapid land use land cover dynamics of eastern Twente have various implications to natural resources management. As the result of the study revealed, expansion of Built-Up area has been occurred at the expense of other land use in the area. Such kind of changes could have a negative impact on the use of the resources in the area, and lead to the reduction of productivity [19]. Expansion of urban areas cannot be stopped entirely but significantly slow down compared to the non-restricted areas [20].
Conclusion
Land use and land cover change detection is the fundamental point in the planning of sustainable management and utilization strategies for managing natural resources and monitoring environmental changes as a whole. As the result of change detection revealed that, most of the land uses in the study are changed to built-up areas which include industrial areas in the region. As a result, the demand of land for agricultural production in the study area becomes a serious issue in the near future and the environmental condition as well. Therefore, understanding and knowing the evolving process of land use land cove changes is a central point for sustainable planning and need consideration in the future.
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