They also dredge channels for sediment to increase floodwater capacity and employ local materials to strengthen embankments and stabilize the beds of rivers and streams. Plantings are made all along the banks to prevent erosion and create a buffer zone of vegetation.
並就地取材進行構築適當的護岸和固床工程，河岸及沉積區全面進行植栽，以防新沖刷，同時也可作為緩衝林帶。