000020073 001__ 20073
000020073 005__ 20170118182353.0
000020073 04107 $$aeng
000020073 046__ $$k2017-01-09
000020073 100__ $$aLodhi, Hira
000020073 24500 $$aAssessing Tsunami Risk To Karachi Port Through Simulation of Currents That Were Reportedly Produced There By the 1945 Makran Tsunami

000020073 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020073 260__ $$b
000020073 506__ $$arestricted
000020073 520__ $$2eng$$aA train of tsunami waves, by resembling a swift series of tides, can produce damaging currents even where wave heights are modest. At Karachi Port, the 1945 Makran tsunami moved boats and damaged a rock groyne without exceeding 3 m in height above ambient tide. A newspaper account mentions an ebb current of 4 to 5 knots. We obtained ebb currents in this range by means of computer simulations with GeoClaw, an open-source code. The simulations, which use bathymetry and shorelines mapped before 1945, presuppose for simplicity a purely tectonic source for the 1945 tsunami. The simulations were tested mainly against an incomplete marigram from the Karachi tide gauge. Runs with modern bathymetry and shorelines show weaker currents, probably because of a post-1945 extension of a breakwater. Using a damage index previously developed from tsunami-current measurements in other harbours, we asked whether the currents simulated for 1945 were fast enough to cause the reported damage to the groyne. Those currents were found fast enough to have caused damage termed “Minor/Moderate” in seaward parts of Karachi Harbour.

000020073 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020073 653__ $$atsunami; current speeds; Makran; Karachi Port

000020073 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020073 720__ $$aLodhi, Hira$$iLeveque, Randall$$iLodi, Sarosh$$iAhmed, Shoaib$$iHasan, Haider
000020073 8560_ $$ffischerc@itam.cas.cz
000020073 8564_ $$s1462718$$uhttps://invenio.itam.cas.cz/record/20073/files/503.pdf$$yOriginal version of the author's contribution as presented on USB, paper 503.
000020073 962__ $$r16048
000020073 980__ $$aPAPER