Mechanical cleaning is the cleaning of canals from silt and debris, algae and other sediments that impede the passage of water. For this, excavators, earth-moving equipment, and other special equipment are used to deepen the bottom of the canals and clean their walls. This work increases the ability of the canals to pass water for irrigation, drainage, and production, and reduces the risk of flooding settlements.

Source : https://www.gov.kz/memleket/entities/water/press/news/details/948481