首页|Spatiotemporal Assessment of Urban Ecosystem Quality: A Decadal (2011-2021) Study of Rourkela, India, using AHP and Remote Sensing
Spatiotemporal Assessment of Urban Ecosystem Quality: A Decadal (2011-2021) Study of Rourkela, India, using AHP and Remote Sensing
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In this modern era, rapid urbanization results in changes in landuse and land cover (LULC) patterns that have a significant impact on urban ecosystems and the loss of native diversity.This study aims to investigate the spatio-temporal variability in the quality of the urban ecosystem of Rourkela city over a decade. The analytic hierarchy process (AHP) is used to prepare urban ecosystem impact index (UEII) maps (2011 and 2021) by assigning the weights of various environmental parameters, namely air quality index (AQI), normalized difference vegetation index (NDVI), normalized difference building index (NDBI), normalized difference water index (NDWI) and land surface temperature (LST). The result revealed that the quality of the ecosystem in Rourkela, especially in the northwestern (Kuarmunda region) and south-western (Kalunga region) parts of the city, has been deteriorating rapidly over the last decade. From 2011 to 2021, more than 5%, 6% and 2.5% of the area of least, low and moderate ecosystem impact zones decreased, respectively and on the other hand, almost 15% of the area of high ecosystem impact zone increased in Rourkela. Such conversion is the result of the large size alteration of open land (13%) and agricultural land (5%) into built-up areas (17%) because of rapid urbanization and industrial growth in Rourkela. The study's findings may be helpful for policy and decision-makers in regard to ecosystem impact assessment, natural resource management in the area and sustainable development of urban areas. Furthermore, the result of this study will help to determine the degree of impact on the ecosystem due to growing anthropogenic activities.
UrbanizationLand cover dynamicsEnvironmental indicesAnalytic hierarchy processUrban ecosystem impact index
Sudhakar Pal、Arabinda Sharma、Monashree Panigrahi
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Gangadhar Meher University, School of Geography, Sambalpur - 768 001, Odisha, India
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