Assessment of thermal environment landscape over five megacities in China based on Landsat 8

Meng, Dan; Yang, Siyao; Gong, Huili; Li, Xiaojuan; Zhang, Jing

doi:10.1117/1.jrs.10.026034

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…Related. e research by Meng et al [1]. Based on the class and landscape-based metrics, the pattern of the thermal landscape can be detected.…”

Section: Introductionmentioning

confidence: 99%

Importance of Water Ecological Environment Protection in Urban Landscape Design

2022

Mobile Information Systems

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With the continuous acceleration of urbanization, urban construction has gradually become an important factor to promote the development of productive forces, the construction level of first-tier cities in China is higher than that of second-tier cities, and the economic volume is about several times that of other cities. Therefore, urban construction is an important factor to promote productivity. As a special regional type, a city watershed is a complex system with integrity and regionality. The particularity of urban watersheds lies in the fact that cities are characterized by the aggregation of elements. Cities are not only areas with densely populated population and buildings, but also the concentrated places of production, consumption and exchange. The development of cities is dynamic and diverse. The city ecological elements in the watershed are closely related, and the upstream and downstream regions are inseparable and affect each other. The current issues in the administration and conservation of the river basin’s water environment are due to conflicts of interest between the upstream and downstream of the city river basin, as well as between numerous departments. The conflict of interest and conflict of interests between the upstream and downstream of the urban watershed and various departments is the difficulty in the management and protection of the water environment in the current watershed. Water environment security means that there are clean and sufficient water resources to meet the needs of human survival, to meet the needs of social progress and economic development, and to maintain a good ecological environment. Water ecology refers to the influence of environmental water factors on organisms and the adaptation of organisms to various water conditions. Urban greening and landscape design are of great significance to the improvement of the ecological environment and the realization of sustainable urban development. This article takes the ecological landscape of a certain area as a research object to study the complexity, diversity, variability and other characteristics of modern ecological environmental problems, and analyzes the relevant situation of water pollution in the landscape ecological environment. The research shows that: permanganic acid in the water body around the lake The salt index, COD, BOD5, total phosphorus, and total nitrogen cannot meet the requirements of the Class III water environment functional zone. Among them, the highest pollution of the permanganate index is the W10 monitoring point, which exceeds 1.98 times, and the second is the W8 monitoring point, which exceeds 1.65 Times; COD pollution is the heaviest at the W7 monitoring point, exceeding the standard by 0.56 times; BOD5 pollution is the heaviest at the W8 monitoring point, exceeding the standard by 0.39 times; the heaviest total phosphorus pollution is the W11 monitoring point, exceeding the standard by 19.90 times. From the water quality testing data, it can be concluded that the water quality of the landscape area is seriously polluted, which seriously affects the drinking water safety of residents. In the process of modern urban garden landscape planning and design, only full use of ecological concepts can reduce the consumption of natural resources, avoid damage to the original ecological environment, and provide a more comfortable and healthy living environment for the people.

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“…Related. e research by Meng et al [1]. Based on the class and landscape-based metrics, the pattern of the thermal landscape can be detected.…”

Section: Introductionmentioning

confidence: 99%

Importance of Water Ecological Environment Protection in Urban Landscape Design

2022

Mobile Information Systems

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“…Landscape ecology is one subject that aims to study and improve the relationships between specific ecosystems and their ecological processes [45]. Landscape pattern, as one of the key research topics of landscape ecology [46], focuses on the quantification of changes in the land elements' configurations and compositions based on landscape metrics [47]- [49].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Wang et al [47] found that cultivated land and water bodies had a close relationship with four landscape-level metrics. Besides these studies, the spatial configuration of the urban thermal environment and its relationship with landscape pattern metrics have been investigated by some researchers [45], [60]. To date, however, existing studies seldom investigated the relationship between different eco-environment grades and landscape metrics.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Change and Landscape Pattern Variation of Eco-Environmental Quality in Jing-Jin-Ji Urban Agglomeration From 2001 to 2015

Wang

Zhou

et al. 2020

IEEE Access

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Identifying the changes and relationships between regional eco-environment quality and landscape pattern in an urban agglomeration have a great significance in realizing sustainable development goal. However, limited research has been performed to understand the spatiotemporal change of ecoenvironment quality, the variation of landscape pattern, and their relationship in an urban agglomeration. This study selected the Jing-Jin-Ji (JJJ) urban agglomeration as the study area. A comprehensive index, the remote sensing ecological index (RSEI), was utilized to understand the eco-environment spatiotemporal change and landscape pattern variation at class-level and landscape-level of JJJ during 2001~2015, then, their relationship was explored. The major conclusions were as follows: (1) The average RSEI value of JJJ increased from 0.43 to 0.46, which represented that the eco-environment of JJJ had improved in the fourteen years. Among it, the improved region was mainly located in Zhangjiakou city, while the degraded region was mainly distributed in the eastern Hebei plain. (2) The landscape characteristics of entire JJJ ecoenvironment were becoming more aggregated, connected, diverse, and regular. However, fair, moderate, and good grades were getting more concentrated and continuous; poor grade indicated a more fragmented and disconnected trend; excellent grade displayed an expanded and concentrated situation. (3) Human factors have an increasing influence on regional eco-environment changes. (4) Fair, moderate, and good grades showed a more dominant and stronger influence on the variation of landscape pattern in JJJ. Specifically, the fair grade had a positive correlation with the variation of landscape pattern, while moderate and good grades had a negative one. All of these conclusions could be valuable information for relevant decision-makers in managing or achieving the optimal eco-environment landscape pattern. INDEX TERMS Jing-Jin-Ji urban agglomeration, landscape pattern, remote sensing ecological index, spatiotemporal change.

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“…Weng et al assessed the effects of land use and land-cover patterns on thermal conditions using landscape metrics in Indianapolis, USA [18]. The promotion and improvement of the thermodynamic landscape method led to the transition of the traditional qualitative research of the thermal environment into the quantitative approach [19,20]. On the one hand, the levels, shapes, connectivity, distribution patterns, and other parameters of urban thermal landscape can be obtained by employing landscape ecology analysis, which provides more scientific information for urban planning and landscape design to alleviate UHI.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Grading Rule on Urban Thermal Landscape Pattern Research

Zhang

Chen

2018

Sustainability

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The thermodynamic landscape method is becoming a more popular approach for urban heat island research with the development of remote sensing technology. However, a limited amount of research discusses the theoretical and methodological issues of this method. This paper analyzed the reliability and stability of the results of thermal landscape pattern analysis with six different grading rules through surface temperature retrieval, landscape pattern analysis, and Geographic Information System (GIS) spatial analysis. The results demonstrate the following points. (1) The six grading methods can be categorized into two types: pixel number methods and temperature range methods. The grading results of the two kinds of methods lack comparability, whereas the grading results within one kind of method have high comparability. The temperature range methods have good consistency. The average value of the consistency indices (Si) of thermal landscape levels reaches up to 81.55%. The anomaly temperature method and standard deviation method are recommended for future research. (2) The grading rule significantly affects the stability of landscape indices, and its average variation coefficient reaches up to 22.36%. The authors suggest the use of landscape indices that have strong stability, such as shape index and landscape division index, in future research. (3) The results of the sensitivity analysis show that the change of the temperature range of thermal landscape levels affects landscape indices slightly, whereas the effect of the change of the level number of thermal landscapes on landscape indices is intense. The authors suggest categorizing the thermal landscape into six levels in future research in order to enhance the consistency and comparability among case studies.

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Assessment of thermal environment landscape over five megacities in China based on Landsat 8

Cited by 9 publications

References 25 publications

Importance of Water Ecological Environment Protection in Urban Landscape Design

Importance of Water Ecological Environment Protection in Urban Landscape Design

Spatiotemporal Change and Landscape Pattern Variation of Eco-Environmental Quality in Jing-Jin-Ji Urban Agglomeration From 2001 to 2015

Impacts of Grading Rule on Urban Thermal Landscape Pattern Research

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