Study on the infiltration mode of irrigation water in loess based on three-dimensional high-density electrical method
Irrigation-induced loess landslide is one of the major geologic disasters in Northwest China. In order to study the infiltration mode of irrigation water in the loess layer, an irrigation experiment was carried out on agricultural land with no fissure development in the loess layer in Gansu Province. The infiltration process of agricultural irrigation water was simulated by artificial diversion irrigation. And the infiltration process of irrigation water is continuously monitored by three-dimensional high-density electrical method. Then, the Res3 Dinv processing software was used to calculate the monitoring data. After that, three-dimensional visualization of electrical data inversion process of loess irrigation water infiltration process was carried out by using Voxler software platform. The experimental results show that the vertical "piston" migration is the main type of irrigation water in the shallow homogeneous loess layer, and the lateral migration ability is weaker. When the depth reaches 5.5～6 m, the water content in the deep layer is almost no longer increased, and the infiltration mode changes obviously, that is, it may be transformed from liquid water transport to vapor migration. The three-dimensional electrical method has a good effect with the sensor monitoring data and vertical shaft verification, which proves that it is feasible to use the three-dimensional high-density resistivity method to study the infiltration method of irrigation water in the loess region.
NETL
NSTL
万方数据
维普
