What is the solution of flooding?

1.Build the dam
The flood retention reservoir behind the dam can store escessive water and reduce the flood frequency at the middle and lower courses

2.Construct the divert channels at the lower courses
The excessive water can divert away

3.Straighten the river
Cut the meanders and allow the water to flow faster

4.Constant dredging
It would be deepth the river bed and more water can be discharged away in a moment

5.Construct or widen the existing lakes at the lower course
It can store up excessive water and regulate the water flow.Also, it allows the deposition of sediments

6.Build the dykes and embankments
It prevents the water flow out the river banks

7.Afforestation
Trees can carry out interception and delay the water to go in to the river
Soil can be held by tree's roots and they are not easy to wash into the river

8. Reduce the urbanization processes near the river
If there is highly urbanization, it can increase the surface runoff which can increase the water level of river immediately after heavy rainfall