Views: 154 Author: pqwt Publish Time: 2022-05-24 Origin: pqwt
The interpretation of pqwt ground water detectors AEGs should not only look at the color, but also at the magnitude of the values. The color is just a visual indication of the magnitude of the value, and the magnitude of the value represented by a certain color of each ground water detectors aerial electrogram is different, so it is also important to observe the magnitude of the value.
Observe the size of the value to have a unified standard: this is the pole distance 10 meters 0 gain measured by the original curve map and the original profile. If the pole distance is less than 10 meters can be projected by the positive proportion of the value of 10 meters. If the gain is +1, divide by 10. If the gain is +2, divide by 100. The data of the processing chart has been processed and cannot be used as a basis for calculation. When observing the color of a certain depth, choose the color of a representative measurement point (not the color of the lower value that is obviously distorted), and then compare the color with the corresponding data of the right color bar.
This case is our joint study with Mr. Wang Yilong in Shandong, the lithology is all chalk red layer, local rock exposure. The distance between the poles is 6 m and the distance between the points is 1 m. The gain is 0. The above figure is the original map of pqwt ground water detectors, and the lower figure is the processed map of pqwt ground water detectors.
From the processing chart, the high value layer is above 45 meters, with a maximum value of 39, which is even larger if converted to a pole distance of 10 meters. According to common sense, the value of high value layer is so big, we should find the low value point. The low value point of this figure is at point 1, but it is abandoned because point 1 has reached the wall and cannot be added to the left.
Considering that there are wells that cannot be pumped dry not far from the measuring line, this may be a fracture-prone area, so we randomly started drilling at point 6. The actual well is 86 meters deep, all red layer, the rock is not very hard, 60 meters above the basic no water, 60 meters down out of the water, the deeper the greater, to 86 meters when the water amount reaches 20 square, the aquifer is all in the low value layer.
Why the case of the aquifer is all in the low value layer? This is what I said earlier about not just looking at the color, but also looking at the magnitude of the values. The high and low values represented by the color are only relative, not as objective as the magnitude of the values.
We are generally divided into four levels from large to small values in the practice of finding water for many years, that is, after excluding the flying point is greater than 10, 10 ~ 1, 1 ~ 0.1, less than 0.1, and as a reference. A large value indicates that the rock is very hard or low fracture rate. A small value indicates that the rock may be very soft, or the mineral composition is bad, or the measurement area is in the unused area and the signal is too weak.
The high value layer in this case has a value greater than 39, which is not very hard and can only indicate low fractality, i.e., bad water content.
The dark blue zone in this case is the relatively lowest value layer, but its value is not small, from the color bar on the right side of the original profile, the value of the dark blue zone at the bottom is 2.3, which is the second level in the four levels we divided, if converted to the pole distance of 10 meters to be larger, the value is not small at all. This is the reasoning behind our analysis of why the red layer can produce big water in the low value layer. If this low value layer is to appear in other layers with lower values in the chart, it will inevitably show up as a high value layer of other colors. The same value level and then look at the contrast between high and low values, "regardless of the number of large and small, the greater the contrast, the better.
We have repeatedly stressed that the picture should be shot clearly and completely, not the color bar and gain is not photographed in the picture, the purpose is to call everyone in the reading of the map both recognize the color and know the number.