(ii) Navigation For a river to be navigable, sufficient depth and width required for navigation should be available even at low water level in the river. River training for navigation is also known as ‘low water training’ or ‘training for depth’. Measures to achieve adequate depth in a river for navigation include dredging the shallow reaches of the river and using spurs to contract the river channel, thus, increasing its depth. Sometimes, low flow is supplemented from another source to achieve the desired depth and width. Canalisation makes a non-navigable river navigable, and, is accomplished by building a series of small dams or weirs and locks. Sharp curves along the river need to be eliminated so that ships can move easily.
