Class on November 7 2017
Rob set up scenarios for the final project and fostered discussions without computers and cell phones:
1. Widen bridges and/or dredge lower river
2. Dredge the sill between lower and upper ponds
3. Establish aquaculture in the Narrow River estuary
The students broke into four different teams to discuss:
What kinds of measurements would you need to take to anticipate the effects of widening a bridge (Middle Bridge) and dredge the lower river?
Rose asked why can't we just raise the bridge (make it higher)?
Rob said for now assume there are restrictions for doing so (political or social).
[Bruce's thoughts: want to know the existing tide, the existing width, the existing depth and develop a flow model for a tidal cycle. Then want to model the change in tide, salinity, temperature based on known engineering flow models for a channel.]
Chris had three students make a cubic meter with their arms and then had everyone imagine 75, 25, and 20 of those going by every second (to represent flow at the three bridges).
Rob showed some visualization of the profile of the river as an amplitude of the tide at Newport (.44 at Narrow River Mouth, .22 at Lower Pond, and .18 at Upper Pond). Providence is actually a higher amplitude than Newport (due to no place for the water to go).
He showed the tidal lab of half an hour at the river mouth, 2.5 hours at Lower Pond, and 3 hours at Upper Pond.
Chris did a visual of estuary flow with the students so that the flow data could be considered as to cause. Students represented water in the estuary moving with tide side view and top view. Lag and friction concepts were added in succession.
Lucie gave a presentation regarding oyster and mussel aquaculture in Rhode Island. Hatchery to Nursery to Grow-out. No room for hatchery and nursery operations but can do a grow-out.
Oysters: Crassostrea virginica (temperature: 18 to 28 degrees C, pressure 14 to 28 PSU (practical salinity unit - parts per thousands), very tolerant of variations
Mussels: Mytilus edulis (temperature: 15 to 25 degrees C, up to 36 PSU (36 ppt | 3.6%), reduced growth < 13, very tolerant of variations
Jake suggested that we look at the castaway data to start considering ideal places to grow-out shellfish.
1. Widen bridges and/or dredge lower river
2. Dredge the sill between lower and upper ponds
3. Establish aquaculture in the Narrow River estuary
The students broke into four different teams to discuss:
What kinds of measurements would you need to take to anticipate the effects of widening a bridge (Middle Bridge) and dredge the lower river?
Rose asked why can't we just raise the bridge (make it higher)?
Rob said for now assume there are restrictions for doing so (political or social).
[Bruce's thoughts: want to know the existing tide, the existing width, the existing depth and develop a flow model for a tidal cycle. Then want to model the change in tide, salinity, temperature based on known engineering flow models for a channel.]
Chris had three students make a cubic meter with their arms and then had everyone imagine 75, 25, and 20 of those going by every second (to represent flow at the three bridges).
Rob showed some visualization of the profile of the river as an amplitude of the tide at Newport (.44 at Narrow River Mouth, .22 at Lower Pond, and .18 at Upper Pond). Providence is actually a higher amplitude than Newport (due to no place for the water to go).
He showed the tidal lab of half an hour at the river mouth, 2.5 hours at Lower Pond, and 3 hours at Upper Pond.
Chris did a visual of estuary flow with the students so that the flow data could be considered as to cause. Students represented water in the estuary moving with tide side view and top view. Lag and friction concepts were added in succession.
Lucie gave a presentation regarding oyster and mussel aquaculture in Rhode Island. Hatchery to Nursery to Grow-out. No room for hatchery and nursery operations but can do a grow-out.
Oysters: Crassostrea virginica (temperature: 18 to 28 degrees C, pressure 14 to 28 PSU (practical salinity unit - parts per thousands), very tolerant of variations
Mussels: Mytilus edulis (temperature: 15 to 25 degrees C, up to 36 PSU (36 ppt | 3.6%), reduced growth < 13, very tolerant of variations
Jake suggested that we look at the castaway data to start considering ideal places to grow-out shellfish.
