The issue of safety in the classroom is rarely considered at such a foundational level. Considering that a participant on a playground can break a leg, or worse, safety occupies a central role in a designerâs thinking.
The Amazon basin is the largest drainage basin in the world, about 7,050,000 square kilometres (2,720,000 sq mi), and accounts for approximately one-fifth of the world's total river flow.he Amazon River and its tributaries are characterized by extensive forested areas that become flooded every rainy season. Every year, the river rises more than 9 metres (30 ft), flooding the surrounding forests, known as varzea (vÃ¡rzea flooded). forests
The Amazon River does flood and it usually starts in November. The  river floods every year and can swell up to 25 miles and tripling  the land area it cover.he estuary where it meets the ocean is over 200 miles across and deep enough for sea-going vessels to travel nearly 2/3 of the way up the river. Approximately 20% of all of the freshwater in the world that enters the ocean is by way of the Amazon river.