Air quality disturbance zone mapping in greater Cochin region of Kerala state, India using geoinformatics
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Air quality disturbance zone mapping in greater Cochin region of Kerala state, India using geoinformatics Naveen S. Lal1 • John Richard Thomas1 • Sumith Satheendran2 • Abin Varghese2 Usha K. Aravind3 • C. T. Aravindakumar1
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Received: 8 August 2019 / Revised: 6 April 2020 / Accepted: 10 April 2020 Korean Spatial Information Society 2020
Abstract Air quality disturbance zones of the Greater Cochin region (Kerala, India) for the years 2014, 2015, 2016 and 2017 along with air quality assessment and dispersion modelling using in situ measurements and mathematical models, have been investigated in this report. Landsat-8 satellite with OLI and TIRS sensors on board were used for the analysis. The ground based in situ measurements (pollutant parameters) were also obtained from the Kerala state pollution control board. Zonal statistics analysis was performed in various combinations especially air quality disturbance zones with respect to land use/land cover and administrative units for various years. The air quality disturbance zone index (AQDZI) values observed indicated that 38.16% of the study area in 2014 belonged to very good category, 22.94% to good category, & C. T. Aravindakumar [email protected]
32.37% to moderate category and 6.53% to poor category. In 2015, 56.78% of study area belonged to very good category and 43.221% to good category while in the year 2016 very good category of AQDZI values occupied an area of 45.284% and good category AQDZI values occupied an area of 54.72%. In 2017, 99.834% of the study area belonged to good category and 1.233% to moderate category. Results obtained from zonal statistics revealed that the poor air quality was observed in built up area and good air quality at rubber plantation in all the four selected years. In the case of administrative units, Kochi Corporation experienced poor air quality during all the years studied and Mulanthuruthy grama-panchayath experienced good air quality during most of the years except in 2016. Keywords Air pollutants Landsat Land use/land cover Remote sensing AQDZI Kochi
Naveen S. Lal [email protected]
1 Introduction
John Richard Thomas [email protected]
No region of the global atmosphere is unaffected by anthropogenic pollution [1] and its composition is greatly affected by human activities on all scales. Air pollution has become a global environmental problem, and has been identified as a serious public health risk [2]. It has also received attention from local and global communities [3]. The emission of potentially hazardous substances both in gaseous and condensed state contributes to increasing concentrations of many trace gases and particulate matter, with resulting impacts on climate change and air quality [4]. Urban population growth and increase in urban areas with changing land use pattern can be considered as the major reasons for air quality problems [5]. Reduction of vegetation, which significantly contributes in air pollution
Sumith Satheendran [email protected] Abin Varghese abin.udumbanat
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