what are the positive & negative effects of river valley projects?

POSITIVE: Dams and spur dikes were constructed to tame the flow of water and keep the river in a smaller river channel to gain ground.

NEGATIVE: However, the smaller river channel increased the damage during floods and these constructions increased the velocity resulting in riverbed sinking. The riverine forest was being destroyed, the pine forests were being cut down, and are there were many digging actions in the Lech?”

The sinking of the riverbed has led to further negative impacts on the fluvial system, such as the separation of the Lech River from its side waters, a drop in groundwater levels, and dry-running of floodplain areas. In addition, dams, which were constructed to protect settlements from high water, are in danger of washout. Thus, not only are rare plant and animal species endangered and natural habitats lost, but local settlement areas are also at risk