Grassed Waterways & Their Design....pptx

Grassed Waterways is an Natural or constructed channels planted with grass or other vegetation.

1. Presented By - INDIRA GANDHI AGRICULTURAL UNIVERSITY, RAIPUR Pt. Shiv Kumar Shastri College of Agriculture and Research Station, Rajnandgaon Narendra Raghuwanshi College ID - 20231227 Signature -

2. Grassed Waterways and their Design Presentation on

3. LIST OF CONTENTS By adopting grassed waterways, farmers and land managers can create a more resilient agricultural landscape, balancing productivity with ecological sustainability. 04 WHAT IS GRASSED WATERWAYS ? 05 PURPOSE & FUNCTIONS OF GRASSED WATERWAYS 06 BENIFITS OF GRASSED WATERWAYS MAINTENANCE OF GRASSED WATERWAYS DESIGN OF GRASSED WATERWAYS 07 SOME PICTURES OF GRASSED WATERWAYS 15 13

4. /04 What is Grassed Waterways ? Grassed waterways are channels that are either naturally occurring or constructed and are planted with grass or other vegetation. Their primary function is to transport surface water across land in a way that prevents soil erosion by slowing down and spreading out the water flow. *Credit- ICAR's EKrishi

5. Purpose To convey surface water across farmland without causing soil erosion. Functions Slow down water flow, spread it out, and allow sediments to settle. /05

6. Benifits To convey surface water across farmland without causing soil erosion. /06 Reduces the velocity and erosive force of running water. Prevents gully formation. Stabilizes soil and prevents erosion during heavy rains and snowmelt. Improves water quality by filtering sediments and pollutants.

7. Design of Grassed Waterways /07 Designing effective grassed waterways involves several key considerations to ensure they function properly and prevent soil erosion. Here are the main steps and factors to consider in the design:

8. Important points about Design of Grassed Waterways /08 Site Assessment: Channel Shape and Size: Slope: Vegetation: Inlet and Outlet Protection: Capacity and Flow: Maintenance Access: Environmental Considerations:

9. 1. Site Assessment: /09 Identify areas prone to water runoff and erosion. Evaluate soil type, topography, and drainage patterns. 2. Channel Shape and Size: Design the channel to have a parabolic or trapezoidal cross-section. Ensure the width and depth are adequate to handle expected water flow without causing overflow.

10. 3. Slope: /10 Maintain a gentle slope (typically between 1-5%) to slow down water flow. 4. Vegetation: Select hardy, deep-rooted grass species that can withstand water flow and aid in soil stabilization. Ensure vegetation is well-established before the waterway is subjected to heavy runoff.

11. 5. Inlet and Outlet Protection: /11 Install structures (e.g., rock riprap, silt fences) at the inlet and outlet to reduce erosion and control sediment. 6. Capacity and Flow: Calculate the expected volume and velocity of runoff to ensure the waterway can handle peak flow events. Use hydrological models to predict water flow and adjust the design accordingly..

12. 7. Maintenance Access: /12 Implement practices for controlling weeds and repairing any erosion or damage. 8. Environmental Considerations: Incorporate features that enhance wildlife habitat and biodiversity where possible. Ensure the design complies with local environmental regulations and guidelines.

13. Maintenance Inspect waterways after major storms and periodically during growing seasons. Regular Inspection: Repair any eroded areas promptly by reseeding and applying mulch or erosion control blankets. Erosion Control: Ensure that water entering the grassed waterway is not excessively concentrated by managing upstream sources and using structures like spreader swales. Water Flow Management: /13

14. Maintenance Prevent livestock from accessing the waterway, as their trampling can damage vegetation and cause erosion. Animal Control: Repair any eroded areas promptly by reseeding and applying mulch or erosion control blankets.Adjust maintenance practices based on seasonal conditions, such as more frequent mowing during the growing season and preparation for potential heavy rains in certain seasons. Seasonal Maintenance: /14

15. Some Pictures of Grassed Waterways is a Natural or constructed channels planted with grass or other vegetation. /15 Grassed Waterways

16. Thank You Source - ICAR's EKrishi & JNKVV May 2024 /16