Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tsunami Bores in Kitakami River   The 2011 Tohoku tsunami entered the Kitakami river and propagated there as a
train of shock waves, recorded with a 1-min interval at water level stations at
Fukuchi, Iino, and the weir 17.2 km from the mouth, where the bulk of the wave
was reflected back. The records showed that each bore kept its shape and
identity as it traveled a 10.9-km-path Fukuchi-Iino-weir-Iino. Shock handling
based on the cross-river integrated classical shock conditions was applied to
reconstruct the flow velocity time histories at the measurement sites, to
estimate inflow into the river at each site, to evaluate the wave heights of
incident and reflected tsunami bores near the weir, and to estimate propagation
speed of the individual bores. Theoretical predictions are verified against the
measurements. We discuss experiences of exercising the shock conditions with
actual tsunami measurements in the Kitakami river, and test applicability of
the shallow-water approximation for describing tsunami bores with heights
ranging from 0.3 m to 4 m in a river segment with a depth of 3-4 m.

36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
16
The categories of this paper are: stat