To improve and decorate the river conditions, so that the water would flood can flow along the River have or allow faster currents, to mitigate the damage from flooding.
Improve and beautify the river So that water can flow along the river spilled over easily or allow water to flow faster, which could mitigate damage from flooding.
Improvement and design of the river. So water flooding stream can flow through the river easily or allows the flow of water even faster, which mitigate the damage from flooding.