HURRICANE BARRY - Discussion Thread - (REMNANTS)
Jul 8, 2019 16:38:20 GMT -6
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Post by Shibumi-Mandeville I-12/Hwy59 on Jul 8, 2019 16:38:20 GMT -6
The river could flow in opposite directions at the same time. If there is enough hydraulic head ( if the storm surge was significantly higher than the river level) then the surface water could flow upstream while the river discharge flows underneath it.
When the river is extremely low the gulf water forms a wedge against the bottom of the river as the river flow is not enough to overcome the difference in height of the gulf compared to the river....so clear, saltier water (which is also more dense so it typically hugs the bottom) and 'moves' upstream.
When this happens there had been some threat to the NOLA drinking water so CE the saltier water can get in the inlets to the treatment plant.
So either extreme can and does allow water to potentially flow counter to the river discharge.
The high river would make it a lot harder for storm surge to travel upstream, but the hydraulics of it do not preclude it happening given a strong enough storm.
When the river is extremely low the gulf water forms a wedge against the bottom of the river as the river flow is not enough to overcome the difference in height of the gulf compared to the river....so clear, saltier water (which is also more dense so it typically hugs the bottom) and 'moves' upstream.
When this happens there had been some threat to the NOLA drinking water so CE the saltier water can get in the inlets to the treatment plant.
So either extreme can and does allow water to potentially flow counter to the river discharge.
The high river would make it a lot harder for storm surge to travel upstream, but the hydraulics of it do not preclude it happening given a strong enough storm.
