Ohio Two-Stage Channels

Klase Ditch was modified to a two-stage channel to increase conveyance capacity and reduce flooding in fields adjacent to the channel. The original channel was incised and had bank stability issues throughout the project reach that required the landowner to frequently maintain the channel. Klase Ditch has a small watershed that drains agricultural fields and pasture (94%), forest (6%), residential areas (0.4%), and water and wetlands (0.2%). All of the soils in the contributing watershed are Hydrologic Soil Group C and much of the agricultural lands have subsurface tile drains to facilitate production. The two-stage channel was constructed in 2005...


Needles Creek during flood event.Needles Creek was a relatively stable drainage channel that underwent intermittent maintenance prior to the two-stage construction. Needles Creek drains a watershed with agriculture and pasture (98%), forest (1%), residential areas (<1%), and water and wetlands (<1%). Soils in the watershed are Hydrologic Soil Group C and D and many fields have improved subsurface drainage. The reach of Needles Creek that was modified to a two-stage channel is owned by the Ohio Department of Natural Resources (ODNR), Wildlife Division. ODNR designed and constructed the Needles Creek project primarily to enhance aquatic and terrestrial habitat and provide water quality benefits. The two-stage channel was sized and constructed as a.....


 

Sugar Creek during constructionSugar Creek is an agricultural drainage channel within the Maumee River Basin which is designated as a Great Lakes Area of Concern. Prior to construction of the two-stage reach on Sugar Creek the drainage channel was a traditional trapezoidal channel with extensive bank erosion causing sedimentation problems. Sugar Creek drains a watershed consisting of row crops and pasture (87%), forest (12%), and water and wetlands (<1%). Watershed soils are Hydrologic Soil Group C.  In an effort to stabilize Sugar Creek, reduce downstream erosion, and demonstrate the two-stage ditch design concept the Ottawa River Coalition organized project partners to implement the two-stage design. Other major project partners included the.....


 

Bull Creek immediately after construction.The Tributary to Bull Creek was the first site to implement the two-stage channel design procedure. The project was undertaken primarily to enhance the conveyance capacity of the drainage channel to reduce flooding in the adjacent fields and farmstead. Even small rainfall events would overtop the channel banks and flood near the landowners home and barns. The Tributary to Bull Creek drains a watershed of row crops and agriculture (97%), forest (2%), and residential areas (2%). Watershed soils are Hydrologic Soil Group C and much of the farmland has improved subsurface drainage installed. The project was a collaborative effort between the......