The name of various parts of the river

Usually the source of the river in the mountains, bringing together a small source of water has gradually joined the ranks or infiltration from the surface into the river. The river has its own river, known as the river at the bottom of the riverbed, known as the shore on both sides. When we look at the lower reaches of the river to the left as the left bank, known as the right bank of the right. A river and its tributaries have been merged into river systems, the entire river system, including the region known as a watershed. The size and flow of the river, and the whole area the size of stagnant water and rainfall-related. Separating the two river systems of the mountain known as the watershed. 

Rivers flow path: 

Can be broadly divided into three sections, and the upper reaches of the middle reaches of the lower reaches, this part of the length of different nature is not the same. 


  Upstream 

The upper reaches of the slope known as the gradient, steep, urgent flow, the slope of decline in the proportion of often more than 50 feet per mile, which dropped 9.3 meters per kilometer. Slope erosion in the upper reaches of the fast, the two sides are very steep, sometimes almost vertical angle, rivers removal ability to move the gravel, and sometimes also carry a large and heavy rock, and the continuous erosion the riverbed, but also because the flow faster, easier to river erosion into a small gully or canyon. 


  Midstream 

Part of the middle reaches of the river to flow to the lower, the slope more gentle, more or less fell by 0.4 per kilometer to 1.9 meters (per mile decreased by 2 ~ 10 feet), velocity slowed down gradually unable to carry heavy things, had no choice but to pile up in the river and, therefore, in the middle reaches of the river bed are often part of the riverbed gravel accumulation. River erosion have reduced the strength of many, the two sides, flat broad valley gradually. 


  Downstream 

Part of the downstream and midstream similar circumstances, but even slower rate, the accumulation of silt gradually raise the bed height, gradient drop per kilometer less than 20 cm (a foot per mile drop), the river often floods caused by river overflow plains.