The barrier shown between two water tanks of unit width $(1\: m)$ into the plane of the screen in modeled as a cantilever.

Taking the density of water as $1000\:kg/m^{3}$ , and the acceleration due to gravity as $10\:m/s^{2}$ , the maximum absolute bending moment developed in the cantilever is _________$kN\cdot m$ (round off to the nearest integer).