1
عمران::
سطح آب زیرزمینی
As a result, to lower the ground- water level or decrease the water content of clay below the groundwater level in a short time period requires large amounts of energy or chemical methods to force the movement of groundwater in clay.
When the groundwater level is loweredorthe water content isdecreased, the properties of clay will change significantly.
This chapter is confined to the introduction of dewatering methods, which are employed to lower groundwater levels.
Therefore, when clay is encountered in an excavation, the groundwater level can be ignored in practical engineering
On the other hand, with the higher flowvelocity ofsand or gravel, simple methods such as pumping are usually enough to lower the groundwater levels.
واژگان شبکه مترجمین ایران