Floods occur when rivers overflow their banks and inundate the surrounding land. This can cause widespread damage to property and infrastructure, and can also lead to loss of life. Floods can also disrupt transportation and communication networks, and can make it difficult for people to access essential services.
2. Pollution
Rivers can become polluted from a variety of sources, including agricultural runoff, industrial wastewater, and sewage. This pollution can make the water unsafe for drinking, swimming, and fishing. It can also harm aquatic ecosystems, and can make it difficult for people to enjoy the natural beauty of rivers.