Views: 11 Author: pqwt Publish Time: 2022-11-15 Origin: pqwt
Ground water detector object detection water selection line is crucial, it can be said that will not choose the line will not test the water, blindly choose the line is blind to test the water.
In the case of local rock outcrops, before measuring to do a good job of geological survey, the line of measurement as far as possible in the lithology of obvious changes, or obvious changes in the production of places, if you can see the fault or veins should be the first choice.
Spring is a natural outcrop of groundwater, in the measurement area if there is a seasonal spring, as long as you can exclude the formation of the upper layer of stagnant water often seen on the slopes of the "skin water", is also the basis for line selection.
In most cases the rocks are rarely exposed, the selection of ground water detector measurement line should follow the following principles: 1.
1, is to choose low not high. "Water flows to the low", this is the law of movement of gravity water. If the water user is pumping year-round, in order to maintain the stability of the water intake, it is best to measure the bottom of the valley in the conditions of water catchment selected well.
2, is the selection of flat not slope. Measurement line should be along the terraced field surface or along the terrain contour layout, try not to be perpendicular or oblique intersection with the foot of the slope, which will increase the difficulty of the analysis of the map.
3, is the soil layer is selected thick not thin. The thinner the soil layer is, the more electrical inhomogeneities there are on the surface, and the more likely there are pseudo-anomalies; the thinner the soil layer is, the more it is the denudation area (i.e. erosion area) of the geomorphology, and the weathering crust is not easily preserved; the thinner the soil layer is, the closer it is to the upstream of groundwater flow, and the smaller the recharge area is.
In line with the above ground water detector line selection premise, ground water detector measurement line direction should try to consider what direction to measure more points, measurement line straight some. In most cases, the direction of the measurement line is restricted by the terrain and features, and can only be arranged along the edge of the ground, roadside, ridge, open space, etc., can not be arbitrarily arranged according to the requirements of the direction of the construction line. According to the theory of geomechanics, in a stress field, any direction may appear structural surface, which direction can find the water is difficult to know in advance, a direction can not find out another direction to find.
In addition, the ground water detector selection line should be as far away as possible from the high-voltage lines or factories with electricity workshop, really can not be far away from the high-voltage lines as far as possible and parallel. If there is a low-voltage line or electrical apparatus nearby, it is best to stop the power measurement. When measuring next to a working transformer, it is better if the drop switch can be disconnected.