An evaluation of monthly impervious surface dynamics by fusing Landsat and MODIS time series in the Pearl River Delta, China, from 2000 to 2015

Zhang, Lei; Weng, Qihao; Shao, Zhenfeng

doi:10.1016/j.rse.2017.08.036

Cited by 104 publications

(47 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sustainability 2020, 12, x FOR PEER REVIEW 16 of 25 13 it is clear that there is an addition within each analyzed period. This compared to Figure 15, shows that the amount of change within some periods were great while others were minimal.…”

Section: Change Rate and Growth Rate Calculations And Analysesmentioning

confidence: 99%

“…Impermeable surfaces, such as concrete, roads, buildings, asphalts, walkways, sidewalks are also called impervious surfaces [9], which is a characteristic of urbanization and modernization. To understand the impact of urbanization, different methods have been expansively studied by [10][11][12][13][14], who further developed a system for retrieving annual and long-term fields of impervious surface cover of urban growth [15]. Previous studies have also developed various ISEI for urban mapping and monitoring studies [16,17], rate of urbanization, urban growth and expansion [18][19][20], and recently applied to megacities [21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact Quantification of Decentralization in Urban Growth by Extracting Impervious Surfaces Using ISEI in Model Maker

et al. 2020

View full text Add to dashboard Cite

Decentralization problems in Africa have caused some infrastructure disparity between country capitals and distant districts. In Ghana, less public investment has created a gap between implementation results and theoretical benefits. Spectral indices are a good approach to extracting impervious surfaces, which is a good method of measuring urbanization. These are restricted by complexity, sensor limitation, threshold values, and high computational time. In this study, we measure the urbanization dynamics of Wa District in Ghana by applying a proposed method of impervious surface extraction index (ISEI), to evaluate the decentralization policy using Landsat images from 1984–2018 and a single S2A data. Comparing our proposed method with five other existing indexes, ISEI provided good discriminated results between target feature and background, with pixel values ranging between 0 and +1. Other indexes produced negative values. ISEI accuracy varied from 84.62–94.00% while existing indexes varied from 73.85–90.00%. Our results also showed increased impervious surface areas of 83.26 km2, which is about 7.72% of total area while the average annual urban growth was recorded as 4.42%. These figures proved that the quantification of decentralization is very positive. The study provides a foundation for urban environment research in the context of decentralization policy.

show abstract

Section: Change Rate and Growth Rate Calculations And Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact Quantification of Decentralization in Urban Growth by Extracting Impervious Surfaces Using ISEI in Model Maker

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 1, Geomembrane is an important part of landfill liner system (Zhang, Weng & Shao, 2017). In order to reduce the tension stress of Geomembrane, an anchorage ditch is designed at intervals on the slope.…”

Section: Geomembrane Modelmentioning

confidence: 99%

Study on the Internal Force of Geomembrane of Landfill in Heavy Metal Contaminated Area

Zhang

2020

Earth sci. res. j.

View full text Add to dashboard Cite

In order to analyze the tension stress of Geomembrane in the seepage control system of a landfill in a heavy metal contaminated area under the action of the overlying landfill weight, the internal force of Geomembrane in a landfill is studied in this paper. Firstly, according to the internal force analysis of Geomembrane model, the basic equation of Geomembrane is obtained, and the equation is analyzed by finite difference numerical solution, so as to analyze the internal force of Geomembrane in a landfill. The method can analyze three stress states of Geomembrane-clay interface at different positions: elastic state, softening state and residual state, which makes the stress analysis of Geomembrane on landfill slope more reasonable. Parametric analysis shows that when the strength loss and the difference between residual displacement and peak displacement are small in the softening stage, the peak strength of Geomembrane-clay interface has little influence on the maximum tensile stress of Geomembrane and its residual strength is the main controlling factor, and when the softening characteristics of Geomembrane-clay interface are obvious, the influence of peak strength and residual displacement is more obvious. ABSTRACT Study on the Internal Force of Geomembrane of Landfill in Heavy Metal Contaminated AreaEstudio sobre la fuerza interna de la geomembrana del relleno sanitario en un área contaminada con metales pesados Con el fin de analizar el esfuerzo de tensión de la Geomembrana (una lamina geosintética que busca evitar la migración de contaminantes al suelo) en el sistema de control de infiltración de vertederos en áreas contaminadas con metales pesados bajo la acción del peso del vertedero suprayacente, en este documento se estudia la fuerza interna de la Geomembrana en los vertederos. En primer lugar, de acuerdo con el análisis de fuerza interna del modelo de la Geomembrana se obtiene la ecuación básica de la lámina, y la ecuación se analiza por solución numérica de diferencia finita para medir su fuerza interna en el relleno sanitario. El método puede analizar tres estados de tensión de la interfaz de Geomembrana-arcilla en diferentes posiciones: estado elástico, estado de reblandecimiento y estado residual, lo que hace que el análisis de tensión de la Geomembrana en la pendiente del vertedero sea más razonable. El análisis paramétrico muestra que cuando la pérdida de resistencia y la diferencia entre el desplazamiento residual y el desplazamiento máximo son pequeñas en la etapa de reblandecimiento, la resistencia máxima de la interfaz Geomembrana-arcilla tiene poca influencia en el esfuerzo de tensión máximo de la Geomembrana, y su resistencia residual es el principal factor de control; y cuando las características de ablandamiento de la interfaz Geomembranaarcilla son obvias, la influencia de la resistencia máxima y el desplazamiento residual es más obvia. RESUMEN Record

show abstract

“…However, due to the presence of mixed pixels in coarse or medium-resolution images, relying solely on multi-temporal data often does not yield satisfactory results [11,12]. Time series images can better solve the spectral confusion problem between similar land cover types [13][14][15][16] and provide clearer distinctions between vegetation changes caused by phenological changes, interannual variations, and vegetation changes caused by impervious surface changes [17,18].…”

Section: Introductionmentioning

confidence: 99%

Multi-Level Classification Based on Trajectory Features of Time Series for Monitoring Impervious Surface Expansions

et al. 2019

View full text Add to dashboard Cite

As urbanization has profound effects on global environmental changes, quick and accurate monitoring of the dynamic changes in impervious surfaces is of great significance for environmental protection. The increased spatiotemporal resolution of imagery makes it possible to construct time series to obtain long-time-period and high-accuracy information about impervious surface expansion. In this study, a three-step monitoring method based on time series trajectory segmentation was developed to extract impervious surface expansion using Landsat time series and was applied to the Xinbei District, Changzhou, China, from 2005 to 2017. Firstly, the original time series was segmented and fitted to remove the noise caused by clouds, shadows, and interannual differences, leaving only the trend information. Secondly, the time series trajectory features of impervious surface expansion were described using three phases and four types with nine parameters by analyzing the trajectory characteristics. Thirdly, a multi-level classification method was used to determine the scope of impervious surface expansion, and the expansion time was superimposed to obtain a spatiotemporal distribution map. The proposed method yielded an overall accuracy of 90.58% and a Kappa coefficient of 0.90, demonstrating that Landsat time series remote sensing images could be used effectively in this approach to monitor the spatiotemporal expansion of impervious surfaces.

show abstract

An evaluation of monthly impervious surface dynamics by fusing Landsat and MODIS time series in the Pearl River Delta, China, from 2000 to 2015

Cited by 104 publications

References 45 publications

Impact Quantification of Decentralization in Urban Growth by Extracting Impervious Surfaces Using ISEI in Model Maker

Impact Quantification of Decentralization in Urban Growth by Extracting Impervious Surfaces Using ISEI in Model Maker

Study on the Internal Force of Geomembrane of Landfill in Heavy Metal Contaminated Area

Multi-Level Classification Based on Trajectory Features of Time Series for Monitoring Impervious Surface Expansions

Contact Info

Product

Resources

About