Well Point Dewatering
Well points are smaller diameter tubes with slot near the bottom that are inserted into the ground from which water is drawn by a vacumm generated by a dewatering pump.System consist of number of well points spaced along a trench,all connected to common header, which is attached to one or better points pump.
System involve excavation of temporary pit & installation of sumps within the excavation, from which water entering into the excavation can be pumped.The number of location of sump pit should be determined & place on the erosion & sedimentations control plan.
- Environmental impact.
- Harm to native vegetation,or erosion of structure or services.
- Chances of flood.
- Sediments build up in drain, water ways.
- System failure.
- Unskilled manpower.
- Improper selection of pump.
- Improper handling of equipment.