El and Bill
New member
A geological note -- New Orleans is below sea level because of the pumping of ground water from the urban area and the land subsidence resulting from the land settling as the water pressure is removed. As the city has sunk, levees were built around the city to prevent either sea water or the Mississippi from flooding the city. The Mississippi, passing through New Orleans, is higher than the city. Any breaching of those levees will result in virtually all the city going under water. This is not ordinary flooding, that subsides with time. The city is below sea level and will remain under water, until the levees are reconstructed and the water pumped out of the submerged city.
Holland, with its renowned dikes (and little Dutch boy with the finger in the dike) and below sea level farmlands, is better known as a below sea level region -- but geologists have long feared and warned of the result of levee breaches at New Orleans. Either a Mississippi River flood breaching the levees or a direct hit from a storm surge associated with a hurricane would inundate the city beneath the Gulf.
Katrina, if it stays on course, dumps the predicted rain and has the predicted storm surge, will cause a breaching of levees both by Mississippi River flooding and storm surge.
These are the comments from a hydrogeologist who has studied the land subsidence at New Orleans -- the damage from the high winds associated with a hurricane are a whole different (and potentially tragic) story that is not part of my expertise -- just my fears for the people of the coastal area.
Our prayers are with those in danger tonight and tomorrow, and in the aftermath flooding of the coastal area and inland rivers. El and Bill
Holland, with its renowned dikes (and little Dutch boy with the finger in the dike) and below sea level farmlands, is better known as a below sea level region -- but geologists have long feared and warned of the result of levee breaches at New Orleans. Either a Mississippi River flood breaching the levees or a direct hit from a storm surge associated with a hurricane would inundate the city beneath the Gulf.
Katrina, if it stays on course, dumps the predicted rain and has the predicted storm surge, will cause a breaching of levees both by Mississippi River flooding and storm surge.
These are the comments from a hydrogeologist who has studied the land subsidence at New Orleans -- the damage from the high winds associated with a hurricane are a whole different (and potentially tragic) story that is not part of my expertise -- just my fears for the people of the coastal area.
Our prayers are with those in danger tonight and tomorrow, and in the aftermath flooding of the coastal area and inland rivers. El and Bill