For lack of proper canalization, while much of the harm is also due to the disforestation of the mountains, owing to which the rains collect in the upland valleys, and are brought down by violent torrents, carrying the soil with them, and so impeding the proper drainage and irrigation of these valleys, and encouraging the formation of unhealthy swamps; moreover, the climate has become much more tropical in character.   anvd [Please select]

31 for the Coosa River canalization, Alabama.   anvd [Please select]