The river found in the plains area and happen to come for long periods of time. Erosion of the water level will be greater than in the deep. These reasons make the river width and a meandering flow characteristics.
Rivers found in wetlands and happened a long time need. The erosion of the water level will be more in depth. Such measures make the river wider. And a meandering flow crema.
The river is found in the lowlands, and was for a long time ago. The erosion of water in a horizontal plane than in the deep. Why such the river was wide. And the flow characteristics like winding.