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Soil erosion is an important environment disaster in black soil region due to the reclamation in past 50 years. Gullies in black soil region destroy farmland and it is a huge threatens of grain productivity security. This paper adopted Spot5 image to interpret gully distribution of study area in northern Nemoer Basin. Basic topography factors were extracted from SRTM elevation data set. The soil data...
Soil moisture is very important on many hydrological, biological and biogeochemical processes. To select the optimal method in this paper, five interpolation methods were compared, and then the optimal interpolation method was used to give the spatial distribution of soil moisture. The results show that (1) Ordinary kriging is the optimal method for interpolating soil moisture in Henan province. (2)...
The Zhuhai city in Pearl River Delta was chosen as a study area. The soil samples were recollected according to the sampling points of Second National Soil Survey. Based on application of geographical information system (GIS) and SPSS software, the content, distribution and its influence factors of available Cu in cultivated soils were analyzed. The results showed that: the average available copper...
Rainfall, especially rainstorm is one of most important triggering factors to the activities of geological disasters, Which has brought great losses to people's life an property. In the support of GIS technology, taking Hubei Province,China as study area, based on detailed analysis of the geological disasters influence factors, this article imported matter-element comprehensive evaluation model to...
Land erosion is regarded as one of the most important phenomenon causes land degradation. In revised universal soil loss equation (RUSLE) erosion model, rainfall erosivity factor (R) is one of the important parameters. Ideally, the calculation of EI30 (R factor) uses breakpoint rainfall intensity data which is calculated manually from graphical charts that are generated by continuously recording rain...
A city three-dimensional foundation information consultant system is developed based on random field theory to predict unknown geotechnical parameters. Taking the geographical information system (GIS) as development platform, the general structure module and database of the system is designed. By means of writing programs in Mapinfo, Visual Basic and Excel, dynamic multi-way inquiry, statistics can...
The spatial distributions and variability of the main nutrients in the topsoil of Chongming island of China are explored by using geostatistics combining with GIS. The multi-scale model is used to analyze the spatial pattern of soil nutrient factors based on the principle of Minimum Nugget Effect to ensure the stability of the interpolation model with the high interpolating accuracy. The result shows...
Based on the macro-scale digital elevation model data, by using ARC/INFO software, the relief degree of land surface (RDLS) of 10 kmtimes10 km grid size is extracted and mapped in urban agglomerations of China. Then this paper systemically depicts the distribution rules of RDLS in urban agglomeration and its correlation with population distribution by analyzing the ratio structure and spatial distribution...
Based on the measured sample data, geostatistics and geographic information system were utilized to analyze the spatial variability of six soil nutrients variables of reclaimed wetland in Sanjiang Plain. All soil nutrients studied had spatial autocorrelation in some extent, and kriging could successfully interpolate these variables. Thus, the combined method could accurately evaluate the spatial variability...
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