India, April 14 -- Due to heavy siltation at the base of the Yamuna, the irrigation and flood control department has proposed raising the river's warning and danger marks to provide a more realistic marker for warning and evacuating residents in low-lying areas, officials said.

According to officials, the Delhi government is considering raising the Yamuna's flood "warning" mark from 204.5 metres to 205 metres, and the "danger" mark from 205.33 metres to 205.75 metres. Officials said that the river's base levels have changed due to siltation and a lack of dredging over the years.

The danger and warning levels are important parameters used to forecast floods. These levels depend on the threat perception in the area, and are decided in con...