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(Added energy dissipation link) |
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<td> Energy Dissipation at Piped outlets <br> | <td> Energy Dissipation at Piped outlets <br> | ||
| − | * ''' Design Guidance ''' <br> | + | * [https://www.fhwa.dot.gov/engineering/hydraulics/pubs/06086/hec14.pdf '''Design Guidance'''] <br> |
* [http://dotapp7.dot.state.mn.us/edms/download?docId=1400414 '''CSP'''] or [http://standardplates.dot.state.mn.us/ '''MnDOT Standard Plates'''] <br> | * [http://dotapp7.dot.state.mn.us/edms/download?docId=1400414 '''CSP'''] or [http://standardplates.dot.state.mn.us/ '''MnDOT Standard Plates'''] <br> | ||
* [http://dotapp7.dot.state.mn.us/edms/download?docId=1400413 '''RCP'''] or [http://standardplates.dot.state.mn.us/ '''MnDOT Standard Plates''']</td> | * [http://dotapp7.dot.state.mn.us/edms/download?docId=1400413 '''RCP'''] or [http://standardplates.dot.state.mn.us/ '''MnDOT Standard Plates''']</td> | ||
| Symptom/Issue To be Addressed | Cause | On-System: Ditch System | On-System: Tile System | Off-System |
| Erosion | Construction | Stormwater Runoff Control (NRCS CP 570) |
Stormwater Runoff Control (NRCS CP 570) |
Stormwater Runoff Control (NRCS CP 570) |
| Excessive Sediment (Aggradation) | Excessive sediment transport from field and upstream ditch bottom and side slopes. | Open Channel (NRCS CP 582) - Natural Channel/Two-stage Channel Design |
Tile Replacement (NRCS CP 606) |
Cover Crops (NRCS CP 340)
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Grade Stabilization Structure - Side Inlet (Various Types) (NRCS CP 410)
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Alternative Tile Intakes (Perforated Risers, Gravel/rock inlets, dense pattern Tile) (NRCS CP 606)
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Grassed Waterways (NRCS CP 412)
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Grade Stabilization Structure (Upstream in Ditch) (NRCS CP 410)
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Water and Sediment Control Basin (NRCS CP 638)
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| Energy Dissipation at Piped outlets |
Contour Bufferstrips (NRCS CP 332)
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Sediment Basin (NRCS CP 350)
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Contour Farming (NRCS CP 330)
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Constructed (Treatment) Wetland (NRCS CP 656)
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Conservation Cover (NRCS CP 327)
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Vegetated Buffer Strips [Filter strips (393)]
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Terrace (600)
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| Conservation Tillage (NRCS CPs 329, 345, 346) |
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Vegetated Bufferstrips [Filter strips (NRCS CP 393)]
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| Excessive Nutrients | Excessive nutrient use, drain tile leaching, carried in surface runoff | Constructed Wetland for Storage and Treatment (In-line or Off-channel) (NRCS CP 656)
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Denitrifying Bioreactor (NRCS CP 605)
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Nutrient Management (NRCS CP 590)
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Open Channel (NRCS CP 582) - Natural Channel/Two-stage Channel Design
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Saturated Buffer (NRCS CP 604) |
Denitrifying Bioreactor (NRCS CP 605)
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Wetland Creation (In-line or Off-channel) (NRCS CP 656)
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Saturated Buffer (NRCS CP 604) |
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Drainage Water Management (NRCS CAP 130, CP 587, CP 554)
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Cover Crops (NRCS CP 340)
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| Conservation Tillage (NRCS CPs 329, 345, 346) |
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Conservation Cover (NRCS CP 327)
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| Conservation Crop Rotations (NRCS CP 328) |
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| In-Ditch Erosion (Headcutting/Degradation) | Excessive Slope in Drainage Conveyance | Rock Riffle/Rock Grade Control Structure Grade Stabilzation Structure (NRCS CP 410)
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Grade Stabilization Structure (NRCS CP 410) Reinforced Concrete Weir Spillway
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Grade Stabilization Structure (NRCS CP 410) Reticulated Concrete Block Drop Structure
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Grade Stabilization Structure (NRCS CP 410) Rock Grade Control Structure
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| Lined Waterway or Outlet (NRCS CP 468) |
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Open Channel (NRCS CP 582) - Natural Channel/Two-stage Channel Design
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| Ditch Slope or Bank Erosion | Channel migration, Excessive discharge | Rock Riprap |
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| Lined Waterway or Outlet (NRCS CP 468) |
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Streambank and Shoreline Protection (NRCS CP 580)
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| Stream Barbs/J-hook Vanes |
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| Stream Restoration - Toe Wood-Sod Mat |
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Open Channel (NRCS CP 582) - Natural Channel/Two-stage Channel Design
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| Tributary Erosion | Excessive slope and Discharge Entering Ditch | Grade Stabilization Structure Side Inlet (Various Types) (NRCS CP 410)
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Water & Sediment Control Basin (638)
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| Excessive Peak Discharge/Inadequate Capacity | Landuse Change, Climate Change, Flooding | Open Channel (NRCS CP 582) - Natural Channel/Two-stage Channel Design
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Surge Pond/Off-channel Storage site | Water and Sediment Control Basin (NRCS CP 638)
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| Surge Pond/Off-channel Storage (See Sediment Pond and Dam Guidance) | Dam (NRCS CP 402) |
Terrace (NRCS CP 600)
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| Dam (NRCS CP 402) |
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Culvert Sizing
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| Statute Mandate in Drainage Law | Statute Mandate in Drainage Law | Vegetated Bufferstrips [Filter strips (NRCS CP 393)]
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