Dewatering is the act of removing water from a site temporarily so that a construction project can be carried out under dry conditions. The water is removed from the area using water pumping. One of the challenges of dewatering with a water pump is that you have to worry about the effects that dewatering can have on soil erosion. You will also need to find the most appropriate location to discharge the excess water. Otherwise, the dewatering process can cause ecological harm.

Follow Local Laws and Regulations

Find out what permits and regulations must be followed to engage in dewatering. Not only will you avoid fines, but these requirements can also serve as guidelines to help you dewater correctly. These regulations mostly focus on protecting the quality of the surface water in the area.

Stop Dewatering if the Soil Becomes Unstable

When engaged in dewatering, if you notice any signs of instability, you should stop dewatering immediately. For example, if the ground begins to crack, the dewatering process should end immediately. Also, stop dewatering if the ground begins to shift.

Use the Right Channels When Dewatering

Channels used for dewatering must be very stable and must also have protection provided by vegetation. Ideally, dewatering should be directed to a wooded buffer. Wooded buffers are heavily vegetated areas that act as a shield against the flow of water. Wooded buffers prevent excess moisture from causing flooding and soil erosion.

Discharge points must be chosen that will not suffer from erosion. The discharge location must be large enough to where the water can be treated before it is finally discharged. The water must be filtered of sediment with dewatering filter bags. One effective strategy is to avoid discharging the water on the surface by distributing it instead through a perforated discharge hose. Another approach is to disperse the water into a heavily vegetated area through water trucks.

Avoid Dewatering On Slopes and Take Precautions if Dewatering On a Slope is Necessary

The water should not be directed into slopes unless you use a slope stabilization method. Otherwise, the slope can increase the risk of soil erosion. One slope stabilization method is the use of perforated drains that are run underground through the slope.

Avoid Dewatering Under Certain Circumstances

There are certain periods when dewatering should never be performed, including when the water has been contaminated by oil chemicals and greases. Otherwise, an oil and water separator will be necessary. Also, you should never discharge water when it is raining heavily because the rain will interfere with the dewatering process.

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