Estuaries can also be found where the river meets the sea. Estuaries are tidal and so contain both salt water and fresh water. Mudflats often form around estuaries.

He said that the Ganga river water forms phages that kill the bacteria. Faecal coliform is an indicator of sewage ...

Many atmospheric river events are weak. But the powerful ones can transport extraordinary amounts of moisture. Studies have shown that they can carry seven to 15 times the average amount of water ...

Water collects and starts to flow down as a stream. Several of these small streams join together to form a river. At this stage the water is fast flowing and can create rapids, waterfalls ...