Carte topographique River Ribble
Cliquez sur la carte pour afficher l’altitude.
River Ribble
On the River Ribble, the tidal bore acts as a hydrodynamic "front," marking the abrupt transition from the prolonged low-water stand to a compressed flood tide. While the Irish Sea rises for over six hours, the narrowing 19th-century training walls funnel the tide into a singular surge, compressing the flood duration at Preston to approximately 90 minutes. The bore typically arrives at the tidal limit 60–90 minutes before the High Water Stand; although the visible wave often dissipates well before reaching the sandstone at Fishwick, its arrival provides the hydraulic momentum that drives the upstream current against existing downstream flows. This maintains the river's characteristic "out of phase" relationship, where the current continues to flow inland even after the vertical water level has reached its maximum elevation.
À propos de cette carte
Nom : Carte topographique River Ribble, altitude, relief.
Lieu : River Ribble, Lancashire, England, United Kingdom (53.73148 -2.89557 54.18253 -2.21854)
Altitude moyenne : 204 m
Altitude minimum : 0 m
Altitude maximum : 726 m
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