The impacts of landscape structure changes on urban surface temperature and heat islands formation of a growing city in southern Sri Lanka DOI Creative Commons
Dilnu Chanuwan Wijesinghe, Neel Chaminda Withanage, Prabuddh Kumar Mishra

et al.

Frontiers in Environmental Science, Journal Year: 2024, Volume and Issue: 12

Published: Nov. 22, 2024

Undoubtedly, urbanization has improved human living conditions. However, it also altered the natural landscape, leading to negative consequences such as increased Land Surface Temperature (LST) and Urban Heat Island (UHI) due expansion of Impervious (IS). Much research been conducted in other countries on effects changing urban landscape structures LST UHI formation. Sri Lanka, only a few studies have available this topic, primarily concentrating major cities like Colombo. is absorbing high amounts solar energy well, which accelerates magnitude urbanized areas. Remote Sensing indices Normalized Difference Vegetation Index (NDVI), Buildup (NDBI), UHI, Environmental Criticality (ECI) can effectively be used quantify intensity phenomenon. This study aimed investigate effect spatiotemporal variations IS Green (GS) LST, environmental criticality Galle Municipal Council (MC), Lanka employing multi-temporal Landsat-5 8 data from four different periods: 1996, 2005, 2014, 2022. Different geospatial techniques including supervised image classification, Urban-Rural Gradient Zone (URGZ) analysis, grid-based profiles, regression analysis were study. The findings revealed that by 42.3% (7.34 km 2 ) while had decline 22.5% (3.91 during concerned period. transition led 2.74 C increase mean surface temperature area, along with 9.5 index 26 years. results further rapidly developed within 4 (URGZ1-19) city center, decreased. Newly built-up areas 1.5 gradient (URGZ1-URGZ8) more affected LST. A positive correlation was identified between NDBI especially year 2022, an R 0.457, NDVI reported 0.257. demonstrated increasingly relationship fraction Surface, highlighting role raising MC. As result, very critical concentrated around high-density Surface. Thus, predicted (EC) may future. In context, planning agencies should prioritize green strategies, implementing belts agriculture particularly criticality. approach help protect environment sustainably ensure health community.

Language: Английский

Analysis of growing season drought characteristics and driving factors for vegetation in the Santun River Irrigation Area in Xinjiang DOI Creative Commons

Yuxin Wei,

Hongfei Tao,

Yan Xu

et al.

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(5), P. e0323918 - e0323918

Published: May 13, 2025

Global warming is exacerbating the occurrence of droughts, which have a significant impact on society. Drought one main factors limiting development Santun River Irrigation Area in Xinjiang. Clarifying driving mechanism and spatial temporal evolution characteristics drought this irrigation area crucial for ensuring sustainable agriculture. In paper, temperature vegetation index (TVDI) used as indicator to analyze Xinjiang, well reveal influencing using Geoprobe model. The results show that mean value TVDI Xinjiang during 19 years was 0. 738, categorizing it medium drought. During period, there an increasing trend spring autumn decreasing summer. district had strong heterogeneity, overall, stronger northern part region than southern region. Over past years, light areas shifted severe classes at rate 114.9 km 2 ·10a −1 . combined effect elevation strongest explanatory power irrigated area, with q-value 0.869. study provide theoretical basis risk assessment water resource planning arid regions, reference monitoring studies similar regions.

Language: Английский

Citations

0
The impacts of landscape structure changes on urban surface temperature and heat islands formation of a growing city in southern Sri Lanka DOI Creative Commons
Dilnu Chanuwan Wijesinghe, Neel Chaminda Withanage, Prabuddh Kumar Mishra

et al.

Frontiers in Environmental Science, Journal Year: 2024, Volume and Issue: 12

Published: Nov. 22, 2024

Undoubtedly, urbanization has improved human living conditions. However, it also altered the natural landscape, leading to negative consequences such as increased Land Surface Temperature (LST) and Urban Heat Island (UHI) due expansion of Impervious (IS). Much research been conducted in other countries on effects changing urban landscape structures LST UHI formation. Sri Lanka, only a few studies have available this topic, primarily concentrating major cities like Colombo. is absorbing high amounts solar energy well, which accelerates magnitude urbanized areas. Remote Sensing indices Normalized Difference Vegetation Index (NDVI), Buildup (NDBI), UHI, Environmental Criticality (ECI) can effectively be used quantify intensity phenomenon. This study aimed investigate effect spatiotemporal variations IS Green (GS) LST, environmental criticality Galle Municipal Council (MC), Lanka employing multi-temporal Landsat-5 8 data from four different periods: 1996, 2005, 2014, 2022. Different geospatial techniques including supervised image classification, Urban-Rural Gradient Zone (URGZ) analysis, grid-based profiles, regression analysis were study. The findings revealed that by 42.3% (7.34 km 2 ) while had decline 22.5% (3.91 during concerned period. transition led 2.74 C increase mean surface temperature area, along with 9.5 index 26 years. results further rapidly developed within 4 (URGZ1-19) city center, decreased. Newly built-up areas 1.5 gradient (URGZ1-URGZ8) more affected LST. A positive correlation was identified between NDBI especially year 2022, an R 0.457, NDVI reported 0.257. demonstrated increasingly relationship fraction Surface, highlighting role raising MC. As result, very critical concentrated around high-density Surface. Thus, predicted (EC) may future. In context, planning agencies should prioritize green strategies, implementing belts agriculture particularly criticality. approach help protect environment sustainably ensure health community.

Language: Английский

Citations

1