def channel_L(self):
        """
        The channel length of the flocculator. If ha.HUMAN_W_MIN or W_min_HS_ratio
        is the defining constraint for the flocculator width, then the flocculator
        volume will be greater than necessary. Bring the volume back to the design
        volume by shortening the flocculator in this case. This design approach
        will produce flocculators that are the same length as the max_L that was
        specified in many cases. The flocculator will be less than the specified
        length especially for cases with only one or two sed tanks.
        channel_L = (vol/(channel_W * downstream_H) + entrancetank_L)/channel_n
        :returns: Channel length
        :rtype: float * meter
        """
        channel_L = ((self.vol / (self.channel_W * self.downstream_H) + self.ent_tank_L) / self.channel_n).to(u.m)
        return channel_L