What is the Meaning & Definition of sump

The drain is an opening or duct that exists in soil and allows drainage of natural water that normally comes from rain or other types of water such as rivers or streams. Formally the geology called sinkholes, which are quite common geological depressions in the land that generated the weathering.
Noteworthy is that sinks normally settle on surfaces where raw materials limestone, eating slowly to the ground and transforming it into a sort of underground cave. Own the water capacity and strength is that generates that soil to fray and this cave that we talked about is generated.
The physical appearance of the sinks is circular, being its very oscillating depth and walls have a pronunciation inclination.
Many rivers that pass below ground feed their flow through the water that circulates through sinks.
Unfortunately these water pipes are used to throw the waste generated by humans, affecting clear is very seriously the health of the environment. Because you download sinks in underground rivers, all the Junk they receive also moved to these flows of water, spreading further contamination of the waters.
The issue of environmental pollution is one of the major problems of this century because clearly and directly affects the health of people, and also because it generates serious imbalances in ecosystems.
Then, one of the main tasks to reverse this situation is to keep clean sinks, not using them as laundry bins suitable for receiving waste. That is not its function or much less.
Another issue that generates dysfunctions with sinks is stamping that often are performed in order to build upon them. The main and major consequence of this action are the floods. To the cover the sink directly affects the natural drain these proposed and then rainwater that finds no place where download ends to accumulate and so feared floods are generated.