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Define RT works, objectives, purposes of spur

Short answer

River training works are structures built along a river to guide flow, control its behaviour, and protect banks and structures from erosion and floods. Three major objectives are: prevent flooding by confining the river, protect banks/structures from erosion/outflanking, and ensure axial flow to structures with silt control. Spurs serve to deflect current away from eroding banks and create slack water for silting.

Define river training works. Enumerate three major objectives of river training works. Write down two basic purposes of spur installation.

Definition (2 marks)

River training works are structures constructed on, along or across a river so as to guide the flow, control the river's behaviour and protect the banks and the structures from erosion, floods and shifting.

Three major objectives (3 marks)

  1. To prevent flooding and spilling over the banks by confining the river within a defined course.
  2. To protect banks and structures (bridges, barrages, embankments, towns, farmland) from erosion, scour and outflanking.
  3. To ensure axial flow to a structure and control silt, so that a stable and uniform channel is maintained for headworks, navigation or water supply.

Two basic purposes of spurs (2 marks)

  1. Training the river: to deflect the current away from an eroding bank and hold it near the centre of the channel.
  2. Creating slack water for silting: to reduce velocity near the bank and promote deposition between the spurs, forming a new, stable bank (land reclamation).

✓ Answer checked by Claude Opus 5.5 (high effort)

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