Abstract Preventing soil salinization and improving productivity play vital roles in achieving the Sustainable Development Goals (SDGs), premise of which is understanding spatiotemporal patterns salinity various ecosystems. To improve regional ecosystem management decisions, we examined spatial variations temporal changes China's West Songnen Plain by separately developing prediction models for vegetated non‐vegetated areas (VEA NEVA) through combination field samples, LANDSAT series images,...

Understanding urban spatial pattern of land use is great significance to management and resource allocation. Urban space has strong heterogeneity, thus there were many researches focusing on the identification use. The emergence multiple new types geospatial data provide an opportunity investigate methods mapping essential popularization street view images represented by Baidu Maps benificial rapid acquisition high-precision data, which attracted attention scholars in field research. In this...

Given the situation of urban expansion and environmental deterioration, government researchers are paying considerable attention to ventilation corridors. The construction corridors requires quantitative data support. Computational fluid dynamics (CFD) has advantages in fine assessment wind environment, a geographic information system (GIS) excellent performance spatial analysis. With Changchun City used as an example, this study proposes establishment on scale mitigate urban-heat-island...

An urban fringe area, depicted as a typical ecotone, is region where both social and environmental problems are concentrated. Identifying evaluating the spatial–temporal characteristics of areas significant for future development. On basis land use data extracted from remote sensing data, Shannon diversity index (SHDI) each unit can be calculated, identifying area by breakpoint method reliable. By using rapidly growing Changchun example, this study identifies in 1995, 2005, 2015 applying...

The urban functional area is critical to an understanding of the complex system, resource allocation, and management. However, due surveys’ focus on geographic objects mixture space, it difficult obtain such information. function a place determined by activities that take there. This study employed mobile phone signaling data extract temporal features human through discrete Fourier transform (DFT). Combined with extracted from point interest (POI) Sentinel images, areas Changchun City were...

An urban agglomeration is a growth pole of regional development. However, the land uses have changed significantly due to impacts intense human activities. Analyzing overall change characteristics use and hotspots has direct reference value for formulation implementation management measures. This study used complex network analysis methods cluster outlier changes in Harbin–Changchun (HCUA). The results showed that farmland exhibited high weighted degree centrality, indicating it key type...

Hyperspectral remote sensing is widely used to detect petroleum hydrocarbon pollution in soil monitoring. Different spectral pretreatment methods seriously affect the prediction and analysis of contents (PHCs). This study adopted a combined data preprocessing technique that improves accuracy hydrocarbons soil. We continuum removal wavelet packet decomposition (CR–Daubechies 3 (db3)) process hyperspectral reflectance 26 samples oil production work area China judged correlation between Partial...

As an important product of Moderate Resolution Imaging Spectroradiometer (MODIS), MOD17A2 provides dramatic improvements in our ability to accurately and continuously monitor global terrestrial primary production, which is also significant effort advance scientific research eco-environmental management. Over the past decades, forests have moderated climate change by sequestrating about one-quarter carbon emitted human activities through fossil fuels burning land use/land cover change. Thus,...

The Northeast China as the sensitive area of global climate change, there was important significance for regional and even terrestrial ecosystem carbon cycle analyzing vegetation net primary productivity (NPP) relationship with temperature precipitation. We used MODIS NDVI data, along synchronous meteorological data to estimate NPP based on improved CASA model, through comparing estimation others' research results real-test collected from papers validate simulation precision. Analyzing...

To discover the process and rules of regional land conversion from marsh into cropland, based on remote sensing GIS technology, this paper integrated topographic maps remotely sensed data, analyzed driving forces cropland during 1976-2005. Results showed that, 1976 to 2005, area decreased by 3/4, 223.06×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> hm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> 95.87×10 . In contrast,...

Ground Penetrating Radar (GPR) evaluates the quality of asphalt pavements and identifies different distresses based on difference in dielectric properties pavement materials at positions structural layers. Asphalt mastic is an important component mixture, performance mortar considerably affects macro mixture. Hence, investigating crucial understanding overall As a temperature-sensitive material, exhibits temperature-dependent variations its properties. Thus, we conducted tests to investigate...