Views: 9 Author: pqwt Publish Time: 2022-07-20 Origin: pqwt
According to the characteristics of the terrain, the following methods can be used in searching for groundwater.
1、Searching for groundwater in ancient river channels
In the old riverbeds of modern rivers as well as ancient river channels, there are very thick loose sediments. They have good permeability and can store rich groundwater. The groundwater in such zones is distributed linearly along the river channels.
2、Search for upper stagnant water in wind-formed sand and floodplain
In the depressions of dry pasture, there are small wind-formed sand and flood-formed gravel layers, which are piled up in the depressions and recharged by atmospheric precipitation and condensation water, easily forming upper layer stagnant water, but the amount of water is generally small.
3、Search for diving in alluvial and floodplain fans
Modern and ancient alluvial and floodplain fans are composed of very thick loose sediments with good permeability, often endowed with fresh water of low mineralization, and generally richer in water.
4、Find water in the dry valley or wide valley
Dry valley is a long strip of depressions, can be distributed intermittently for several kilometers or tens of kilometers, it is an ancient river valley or in the remains of ancient lakes, the bottom of the valley is a loose gravel layer, richer in water.
The perennial flowing rivers in the wide valley have abundant water sources in the upper reaches or on both banks. Therefore, the loose strata on both sides of the river in the wide valley are stored with abundant is groundwater.
5、Search for groundwater in the upper reaches of lakes
The grassland has an arid climate, little atmospheric precipitation and high evaporation, so generally the lakes are mostly intermittent or saltwater lakes. However, there are also freshwater lakes and spring streams with water all year round, and most of the water sources of these lakes and spring streams come from groundwater. Find water in the upstream section of the direction of the lake water, can find abundant groundwater.
6、Find water in the downstream of the river without tail
Rivers in arid areas, the flow is limited, sandy riverbed leakage, coupled with high evaporation, some rivers disappear after a certain distance, such rivers are called no tail river in the lower reaches of the river or nearby wells, can have water.
Combined with the above geological water search common sense knowledge to find the first step of water, really to achieve a high accuracy rate and save drilling costs or through the scientific apparatus to measure the fixed point.
PQWT automatic map ground water detector is easy to operate and collects subsurface data directly to form a geological structure profile, which can be analyzed to determine the geological structure of the water-bearing layer.