  We present the spatially resolved measurements of a cool galactic outflow in
the gravitationally lensed galaxy RCS0327 at $z \approx 1.703$ using VLT/MUSE
IFU observations. We probe the cool outflowing gas, traced by blueshifted Mg II
and Fe II absorption lines, in 15 distinct regions of the same galaxy in its
image-plane. Different physical regions, 5 to 7 kpc apart within the galaxy,
drive the outflows at different velocities ($V_{out} \sim $ $-161$ to $-240$ km
s$^{-1}$), and mass outflow rates ($\dot{M}_{out} \sim$ 183 to 527 $M_{\odot}\
yr^{-1}$). The outflow velocities from different regions of the same galaxy
vary by 80 km s$^{-1}$, which is comparable to the variation seen in a large
sample of star-burst galaxies in the local Universe. Using multiply lensed
images of RCS0327, we probe the same star-forming region at different spatial
scales (0.5 kpc$^2$-25 kpc$^2$), we find that outflow velocities vary between $
\sim $ $-120$ to $-242$ km s$^{-1}$, and the mass outflow rates vary between
$\sim$ 37 to 254 $M_{\odot}\ yr^{-1}$. The outflow momentum flux in this galaxy
is $\geq$ 100% of the momentum flux provided by star-formation in individual
regions, and outflow energy flux is $\approx$ 10% of the total energy flux
provided by star-formation. These estimates suggest that the outflow in RCS0327
is energy driven. This work shows the importance of small scale variations of
outflow properties due to the variations of local stellar properties of the
host galaxy in the context of galaxy evolution.
