--- title: "Objectives of river training works" subject: "Irrigation and Drainage Engineering" chapter: 6 key: "semester_6/irrigation_and_drainage_engineering:river-training-objectives-five" source: https://www.bctengineer.com/q/semester_6/irrigation_and_drainage_engineering/river-training-objectives-five site: BCT Engineering --- # Objectives of river training works Irrigation and Drainage Engineering · Chapter 6: River Training Works - Asked in: 2066 Bhadra (old course), 4 marks - Video: [Irrigation- River training works / Objectives / Classification / Methods of River training (Hindi)](https://www.youtube.com/watch?v=RUyHrZIB1WU) — Yogendra Ram Meena - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_6/irrigation_and_drainage_engineering/river-training-objectives-five - Whole chapter: https://www.bctengineer.com/md/semester_6/irrigation_and_drainage_engineering/chapter-6 ## Question Write down the five objectives of river training works. ## Short answer The five objectives are: flood protection by confining the river; bank protection and prevention of avulsion; providing axial flow to structures; controlling silt for reclamation and scour prevention; and maintaining a stable channel for navigation and water supply. ## Answer River training works serve five main objectives. 1. **Flood protection:** confine the river within a fixed channel and prevent it from spilling over the banks and flooding adjacent land and settlements. 2. **Bank protection and prevention of avulsion:** stop erosion of the banks and prevent the river from shifting its course or outflanking bridges, barrages, towns and roads. 3. **Axial approach to structures:** guide the flow centrally and smoothly to the opening of a bridge, barrage or headwork, avoiding eddies and cross-currents. 4. **Control of silt and sediment:** induce silting where land is to be reclaimed and prevent deposits or scour holes at critical locations (such as in front of a canal head regulator). 5. **Maintenance of a stable channel for use:** keep a definite, stable channel and depth for navigation, water supply or irrigation intake and protect the river against excessive meandering. Common works used are guide bunds, spurs, marginal embankments, revetments and cut-offs, chosen to suit the river and its objectives. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. How do training works give flood protection? A. Store water in the plain B. Increase silt C. Move the river onto the flood plain D. Confine the river in a fixed channel to stop spilling over the banks Answer: D. Confining flow within a defined channel prevents spilling onto adjacent land. (Key point: Flood protection) 2. What does bank protection and avulsion control prevent? A. Navigation B. Siltation of fields C. Rainfall D. Erosion of banks and the river shifting course or outflanking bridges and barrages Answer: D. It keeps the river from changing course and outflanking structures. (Key point: Avulsion and outflanking) 3. Why give an axial approach to a structure? A. To avoid eddies and cross-currents at the opening B. To shift the thalweg C. To increase afflux D. To create more scour Answer: A. Smooth, central flow avoids eddies and attack on the abutments. (Key point: Axial approach) 4. Silt control as an objective means: A. Induce silting where land is to be reclaimed and prevent deposits or scour at critical locations such as a head regulator B. Remove all sediment from rivers C. Ignore deposits D. Increase silt everywhere Answer: A. Silting is encouraged where wanted and prevented in front of intakes and structures. 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