Effect of Earth Covering and Water Body on Land Surface Temperature (Lst)

Abstract

Land surface covering and water body play an important role on local environment especially on Land Surface Temperature (LST). In study above mentioned concept has been conducted on the drainage basin of Atai-Bhairab-Rupsha river confluence which is an important place both for agriculture and trade in the south-western part of Bangladesh. Here the impact of both surface covering and water body on local environmental factor like LST is being analyzed to determine the main catalyst in ever changing LST. LST study in this area which is changed dramatically recently may be a well-defined index, reflects environmental conditions. LST is mainly altered by the factors like land surface covering such as vegetation represented by NDVI, water body by NDWI, and barren or urban area by NDBI but only few are key factors. The gradual changes of these four parameters (LST, NDVI, NDWI, and NDBI) are studied for the years 1991, 1996, 2002, 2006, 2011 and 2017. From the LST study, it is observed that from 1991 to 2017 highest temperature decreased significantly and the difference between 1991 and 2017 is greater than 100C. Variation of lowest temperature all these years are insignificant. Meanwhile, from NDVI analysis if is observed that area of vegetation coverage increased in a significant rate from the years 1991 to 2017. The area of water body is being found almost unchanged in this time period from the NDWI analysis. Nevertheless, from the NDBI analysis it is found that the barren area is diminished significantly in this period and is obviously replaced by vegetation. At all, it can be said that the highest value of NDVI in 1991 is greater than 2017 denotes some short of drought or increasing salinity condition but in general viewpoint vegetation helps to keep surface temperature under control.

Impact of Urbanization on Urban Heat Island Intensity in Major Districts of Bangladesh Using Remote Sensing and Geo-Spatial Tools

“…These results conclude that Dhaka and Chattogram are highly concentrated urban areas with intense land surface temperature; hence, they retain greater hotspot zones. Similarly, diversified surface temperatures are acknowledged for different cities in Bangladesh including Chattogram [62,63], Dhaka [58], Rajshahi [45,64,65], Barisal [66], and Mymensingh [67]. The obtained identification determines that dry land considers high LST values as well as urbanized areas, which is shown in the exploration of several studies [45,63].…”

Utilizing remote sensing data and ArcGIS for advanced computational analysis in land surface temperature modeling and land use property characterization

“…The ongoing urbanization process has resulted in the expansion of urban areas, causing significant changes in land surface properties. In the context of global warming, LST emerges as a relevant indicator, with a strong relationship to factors such as vegetation, water bodies, and, most notably, urban development (Uddin & Mondal, 2020). LST is a valuable source of information about surface attributes and climate dynamics, making it useful in a variety of environmental scenarios (Weng & Yang, 2004).…”

Analyzing land surface temperature changes in the Danjiang River Basin: a MODIS-based reconstruction and assessment before and after the middle route of the South-to-North Water Diversion Project

“…3 The alterations may have profound effects on the existing climate and ecological balance in the Danjiang Basin (Henan section). 4 LST is a critical factor in the energy and water balance of the Earth's surface, playing a pivotal role in the analysis of regional LST variations. Accurately assessing its spatial and temporal distribution and studying the potential impact of the central route of the South-to-North Water Diversion Project are of paramount importance.…”

“…Changes in land use types directly affect the LST, 2 altering the surface heat balance and impacting regional heat flux and evapotranspiration 3 . The alterations may have profound effects on the existing climate and ecological balance in the Danjiang Basin (Henan section) 4 …”