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soil Organic Carbon Transformation and Related Properties in Urban soil Under Impervious Surfaces

Pedosphere 2014年第1期24卷 56-64页

作者： WEI Zong-Qiang WU Shao-Hua ZHOU Sheng-Lu LI Jing-Tao ZHAO Qi-Guo School of Geographic and Oceanographic Science Nanjing University Institute of soil Science Chinese Academy of Sciences

Installation of impervious surface in urban area prevents the exchange of material and energy between soil and other environmental counterparts,thereby resulting in negative effects on soil function and urban *** samples were collected at 0-20cm depth in Nanjing City,China,in which seven sites were selected for urban open soils,and fourteen sites with similar parent material were selected for the impervious-covered soils,to examine the effect of impervious surface on soil properties and microbial activities,and to determine the most important soil properties associated with soil organic carbon(SOC)transformation in the urban soils covered by impervious *** organic carbon and water-soluble organic carbon(WSOC)concentrations,potential carbon(C)and nitrogen(N)mineralization rates,basal respiration,and physicochemical properties with respect to C transformation were *** of impervious surface severely affected soil physicochemical properties and microbial activities,e.g.,it significantly decreased total N contents,potential C mineralization and basal respiration rate(Psoils at 0-20 cm was 2.35 kg m^(-2),which was significantly lower than the value of 4.52 kg m^(-2)in the open soils(Psoil,and it was highly correlated with total N content and potential C mineralization *** findings demonstrate that installation of impervious surface in urban area,which will result in decreases of SOC and total N concentrations and soil microbial activities,has certain negative consequences for soil fertility and long-term storage of SOC.

关键词： carbon mineralization microbial activity soil fertility soil sealing water-soluble organic carbon

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Analyzing the extent and use of impervious land in rural landscapes

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Geography and Sustainability 2024年第4期5卷 625-636页

作者： Andreas Moser Jasper van Vliet Ulrike Wissen Hayek Adrienne Grêt-Regamey Planning of Landscape and Urban Systems(PLUS) ETH ZurichStefano-Franscini-Platz 5ZurichSwitzerland Institute for Environmental Studies(IVM) Vrije Universiteit AmsterdamDe Boelelaan 1111Amsterdamthe Netherlands

The amount of impervious surface is increasing rapidly *** urban expansion has been studied extensively,the alteration of impervious land cover in rural regions remains *** particular,insights into the utilization of these sealed surfaces are crucially needed to unravel the underlying dynamics of land use changes beyond urban *** study focuses on rural regions from a Swiss case study and presents an analysis of the use of sealed surfaces in such regions,rather than solely quantifying the extent of sealed *** a synergistic approach that merges detailed cadastral plans with very-high-resolution remote sensing imagery and sophisticated deep learning algorithms,we characterized the uses of sealed surfaces,including buildings and their *** findings reveal that 2.1%of the study area’s rural regions comprises sealed surfaces-an area comparable to the sealed surfaces in the urban *** these rural regions,transport infrastructure represents 68%of this impervious *** account for 12%,and their surroundings,constituting 13%,are utilized primarily for agricultural purposes,including farming and livestock *** deep learning approach achieved a classification accuracy of 72%for a shallow model and 79%for a deeper model,indicating that mapping building types is possible with reasonable *** outcomes of this study underscore the critical need to factor in the presence and utilization of impervious land cover within rural regions for the sustainable management of land resources.

关键词： soil sealing Rural areas Very-high-resolution aerial imagery Building types Convolutional neural networks Cadastral data

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