Across
- 4. agriculture
- 6. not allowing water through
- 9. making river beds deeper by digging
- 10. larger boulders rolling on the bed this way
- 11. overflow of water from a river
Down
- 1. erosion where air and water forced into cracks
- 2. raising the sides of the river bank
- 3. factors, natural factors
- 5. watering of crops by human design
- 7. lighter material in the river is carried by
- 8. naturally flooded areas permanently saturated
- 12. formed by backward erosion from a waterfall