Rivers often begin way up in mountains, with trickling streams that
converge and join forces as gravity pulls them down. The ground is
often steep. It can also be rocky, which means rain water cannot sink
very deep under ground. Instead, it spreads out, causing a seep, or
shallow, wet area.
Gravity pulls water lower. As water seeks the easiest route
down, it begins organizing into trickles and rivulets, which
form brooks and streams, known as tributaries, that eventually
combine to form a central river bed.
The Bronx River headwaters are not particularly high, but they are still far above the rest of the river.
You've just worked with elevation data about the Bronx
River.
1. At what altitude were the original headwaters of the Bronx River?
2. At what altitude is the last dam on the Bronx River?
3. What body of water does the Bronx River flow into?
