At the moment, the installation of the well is carried out with the obligatory use of such an element as captage. Capes taking and collecting key waters should be simple and durable in their device, and are also required to satisfy the following requirements:
The collected water in the captage should not overfill it, and, therefore, not create backwater that opposed the free exit of the key; Therefore, when building a capture, a device of proper removal of excessively incoming water should be provided;
The design of the captive device should exclude the possibility of pollution, clogging and flooding with surface waters;
The capture device should allow the possibility of conducting the inspection and periodic cleaning and insulation of it;
Captail devices should be provided with natural ventilation, have a ventilation pipe to refresh air.
Capatible structures can be different, depending on the nature of the key, its location, on the occurrence and composition of the soils at the place of the release of the keys, etc. D. There are two types of captures: capture of downward keys and capture of upward keys. It is worth noting that experts recommend that the masters recommend their installation
Capture of downward keys. Downward keys, as a rule, are formed on the slopes of the valleys and beams, in places of reaching the surface of the earth of water -armed horizons. Key waters break out on a relatively large area with a small pressure and have a shallow falling and small power at the exit site.
To increase the performance of descending keys with capture, one must strive for the most complete interception of them in width and depth; In this case, the seizure of water should be made at such a depth from the surface so that draining groundwater could not get into the water.