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Relying on the background of large section soil tunnel engineering, the numerical simulation on three excavation methods for soil tunnel including bench method, arch heading method and cross diaphragm were carried out. Results show that the arch heading method is confirmed as optimum for this project by comparative analysis. And then, according to the monitoring results of the arch heading method,...
In order to obtain accurate calibration model of TDR-based sensors for monitoring soil water content, TDR-based sensor was calibrated using Takagi-Sugeno fuzzy model. The precision of calibration model was verified by correlation coefficient. The experimental results show that the calibration model based on the Tagagi-Sugeno fuzzy model gets high accuracy of piecewise linear fitting. Wireless Sensor...
Taking Wudaogou Station as the experimental basis, Geostatisics combined with ArcGIS was applied to analyze agricultural non-point sources (AGNPS) pollution characters caused by spatial variability of nitrogen and phosphorus in agricultural soil. A field sampling scheme and structure are to carried out for three different scale watersheds by combining random sampling and systematic sampling method...
Safety construction of deep foundation pit in narrow space is one technology difficulty. Analysis on the deformation of adjacent building during excavation and supporting is the key factor. Taking the deep foundation pit, supporting structure and surrounding buildings as one system, this paper applies the numerical simulation analysis method to carry out the comparative simulation for the changing...
Drought in sprint is one of the natural disasters that threatens our agriculture development and causes series environment, social and economical consequences. Remote sensing technology becomes possible to rapidly monitor soil moisture in regional scale by combining remote sensing and Geophysical Information Systems technology. In this paper, a thermal inertia map was obtained from MODIS 1B data on...
This paper presents a method to characterize snow cover at a massif scale using dual-polarization C-band SAR data. It is demonstrated that it is crucial to exactly model the distribution of liquid water inside the snowpack in order to perform accurate snow characterization at C-band. Consequently, the key point of this new method consists in using a multi-layer meteorological snow model. Based on...
This paper mainly introduces the drought monitoring model based on the cloud parameters method and Remote Sensing data with a stable performance to the temporal and spatial variation of remote sensing data, especially in the spatial scale. Based on the fundamental of solar radiation, we deduce the spatial modification functions about the different drought levels with the regression method. Meanwhile,...
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