Views:393 Author:Site Editor Publish Time: 2019-06-14 Origin:Site
Maps from Man Kaifeng Shandong
This is a limestone case, which is a successful case of finding low values in low values, and is also a typical case of predicting aquifers by processing maps.
1, the above picture is the original map, there is a horizontal low-value band in the middle of map. In this low-value band, there are two dark blue areas with lower values. Are the boundaries of the two dark blue areas gradual or abrupt? , it is not good if it is “gradual”. But If it is “abrupt”, it indicates that the gradient of change is large, so it is a watery part, but it cannot be determined just by one original picture.
2, the second picture is the processing map, the boundaries of the two dark blue areas are all contours dense, as the previous picture commented, the contours are dilute-dense-dilute changes from top to bottom, indicating their boundaries gradient change is big, it is abrupt and easy to find water.
3, then check the third curves map, the two dark blue low value lines form a large distance area, as well as the 2019-3 picture, they are dilute-dense-dilute changes from top to bottom, it can also indicate the boundary is abrupt.
4, We chose point 12 for this case, the result is good, there are two layers of water, one layer is about 50 meters, the other layer is 70 - 80 meters, water quantity is very large, about 30 square meters / hour, confirming that the above analysis is correct.
5. According to the above analysis, points 1-3 and 11-15 in the map are also good points.This case shows that we can read 3 maps together and make a comprehensive analysis for a better result.