Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laboratory Study of Wave Attenuation by Mangrove Forest   Coastal vegetation can dissipate the energy of storm surge and tsunami, which
serves a natural barrier for coastal protection. The experimental study of
waves-mangroves interaction was carried out to evaluate the efficiency of wave
attenuation by vegetation (WDV). In particular, the model mangrove consisted of
a flexible canopy and a rigid stem to imitate natural Rhizophora better. It
considered the effect of various wave conditions including incident wave height
(${H_i}$) and wave period ($T$) as well as plant characteristics including
submergence ratio ($\alpha $) and stem density ($N$), respectively. Then, the
exponential wave decay coefficient (${K_i}$) was applied to determine the
performance of WDV. It showed that larger ${H_i}$, $\alpha $ and smaller $T$
induced greater wave decay. To quantify WDV, a new analytical model was
proposed considering the change of stem arrangement and wave parameters along
the vegetation. Further, the drag coefficient, ${C_D}$ of mangrove forest was
analytical calibrated by this model, and made a comparison with the previous
model. Based on this model, the relationships between ${C_D}$ and some
non-dimensional parameters, e.g. Reynolds number, ${\mathop{\rm Re}\nolimits} $
, Keulegan-Carpenter number, $KC$ and Ursell number, ${U_r}$ were established
to evaluate and predict the wave decay. Especially, it showed a better
correlation relationship than the previous model, and the predicted results
showed a good agreement with the experimental data.

1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org