Intersect Point and Bathymetry
            returns bool

def intersect(self, **kwargs):
        """
            Intersect Point and Bathymetry
            returns bool
        """
        end_point = kwargs.pop('end_point')
        depth = self.get_depth(location=end_point)
        # Bathymetry and a particle's depth are both negative down
        if depth < 0 and depth > end_point.depth:
            inter = True
        else:
            inter = False
        return inter