2.2 Flood wave scenarios
Due to seasonal flood events and reservoir operations, the stage of the
Inbuk Stream at the investigation site fluctuates approximately
sinusoidally, with the maximum amplitude and duration reaching 1 m and
10 d, respectively (Liu et al., 2019). To better understand the
stream-aquifer water exchanges driven by different flood wave
parameters, a variety of flood wave scenarios were designed (black
square frame in Fig. 2). To accomplish this, the values of A ,T , r and t p were varied, and the
range of each parameter was roughly determined by the stream stage
measurements obtained between 2014 and 2016.
Additionally, a variety of flood waves of different T /Aand N were envisaged (red square frame in Fig. 2) by assuming
CUFV condition, saying keep the integral of flow discharge overtime in
the upstream of the investigation site constant. The cross-section
discharge is an exponential function (exponent = 8/3) of the
corresponding water depth (Liu et al., 2019); however, in this study we
established a linear relationship (i.e. exponent = 1) between the
cross-section discharge somewhere in the upstream of the site and the
water depth at the specific site. Through this way, we could design
different flood waves under CUFV condition by controlling the integral
of the flood wave over time at the site.