Analysis of dynamic changes in the urbanization of Xixian National New Area and its driving forces

2018 ◽  
Vol 28 (9) ◽  
pp. 1181-1189
Author(s):  
Yue Chang ◽  
Kang Hou ◽  
Xuxiang Li ◽  
Yue Zhang

This study analysed the dynamic changes and driving forces in the urbanization from 1997 to 2016 of Xixian, a national new development area in Xi’an City, by using geographical information systems and remote sensing. The results showed that farmland was the main land use type from 1997 to 2004. However, the construction land occupied the largest area from 2011 to 2016. There was a significant expansion in the construction land area (33.24%), unused land (91.10%) and woodland (37.59%) from 1997 to 2016. In addition, in the period from 1997 to 2016, the water body, grassland and farmland were reduced by 52.52%, 31.73% and 23.84%, respectively. The increasing area of construction land was the inevitable result of urbanization. The terrain, policy and geographical location factors are the main driving forces for changes in the land use and urbanization. The planning of Xixian National New Area’s building environment should be linked and connected with the Xi’an main districts. The findings confirmed the applicability and effectiveness of the combined method of geographical information systems and remote sensing for revealing the notable spatio-temporal features in the dynamic changes in the land use and land cover throughout different time periods of Xixian.

Author(s):  
H. Menteşe ◽  
A. Eymen

Abstract. The sustainable use of water and soil, which are indispensable for living things, is closely related to the concept of land use. While land use is becoming gradually modern as a necessity of the age, urbanization and industrialization are also gaining great importance. So much so that, in Turkey, where agriculture-based economy was emphasized until the 1980s, interest in exports of industrial products has increased in recent years and industrial investments especially in the Marmara region have increased considerably. This situation has increased job opportunities due to the industrialization developing in the region and has led to an increase in the population in parallel. The structure process has accelerated in order to meet the needs of the increasing population.Basin areas, which contain a wide variety of classes, are among the regions that are highly affected by these changes. Within the scope of the study, Elmalı Basin, which is used to supply potable and utility water to the province of Istanbul, was chosen as the study area. Within the scope of the research, the temporal change of the land use in Elmalı Basin has been investigated by using Landsat-8 satellite with a spatial resolution of 30 meters for the years 2013, 2015, 2018 and 2020 taking advantage of Geographical Information Systems (GIS) and Remote Sensing (RS) technologies. Classification was made with support vector machines, one of the controlled classification methods on satellite images, and the changes in land use were evaluated by comparing the images of working years.


2015 ◽  
Vol 24 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Mohamed Gliz ◽  
Boualem Remini ◽  
Djamel Anteur ◽  
Mohammed Makhlouf

Abstract Located in the north west of Algeria, the watershed of Wadi El Hammam is threatened by water erosion that has resulted the silting of reservoirs at cascade: Ouizert, Bouhanifia and Fergoug. The objective of this study is to develop a methodology using remote sensing and geographical information systems (GIS) to map the zones presenting sensibility of water erosion in this watershed. It aims to produce a sensibility map that can be used as a reference document for planners. The methodology presented consists of three factors that control erosion: the slope, the friability material and the land use, which were integrated into a GIS. The derived erosion sensibility map shows three areas of vulnerability to water erosion: low, medium and high. The area of high vulnerability corresponds to sub-basin of Fergoug.


Author(s):  
S. Ahi ◽  
A. Eymen

Abstract. Development movements bring along population movements. Investments in Istanbul make the city of Istanbul even more attractive. With the increasing population, the need for water is increasing day by day. Construction of the 3rd Istanbul Airport within the borders of Terkos Basin, which is one of the important drinking water resources of Istanbul, has caused land use changes in the basin. Geographical Information Systems (GIS) and Remote Sensing techniques have been used to examine this change. The data obtained through Remote Sensing can be easily analyzed in GIS environment.In this study, Landsat 8 satellite images of the years 2013, 2015 and 2020 were preferred in the examination of the temporal change of land use of the Terkos Basin. The satellite images obtained were classified using the controlled classification technique in the Envi program. Satellite images classified for the creation and analysis of land use maps have been transferred to the ArcGIS program. The changes in the classes determined according to the obtained results were examined, and the changes in question were revealed by spatial analysis. Suggestions have been made for the protection of the Terkos drinking water basin and ecosystem, which is extremely important for Istanbul.


Author(s):  
Rita Colantonio Venturelli ◽  
Andrea Galli

Dr Colantonio Venterelli has a degree in Architecture from Rome University. She is a researcher at DISASC (Department of Applied Sciences to Complex Systems) and at the Engineering Faculty of Ancona University, where she is currently teaching Land Planning. Her main research interests and publications regard land planning in relation to environmental resources and the ecological study of the landscape. She has been involved in teaching and scientific exchanges with German universities for many years. She is a member of the World Society for Ekistics. Dr Galli has been Associate Professor of Analysis and Planning of Agricultural Systems at DISASC of Ancona University, Faculty of Agriculture, since 2001. An agronomist, he is currently teaching subjects related to Rural Buildings, Surveying, Cartography, Remote Sensing, Geographical Information Systems, Land Use Planning. Since 1982, his research activity and scientific production have concerned the analysis and evaluation of rural resources, Remote Sensing techniques applied to the rural landscape, Geographical Information Systems technologies, the ecological stability of the rural landscape, changes in land use, and the land use planning process. He has been a member of numerous national, regional and local research projects and has published more than 70 works including articles and books.


Sign in / Sign up

Export Citation Format

Share Document