lasher

noun [专属名词]堰（下的水塘）；鞭打者；用来捆绑的绳索

For the arch dam which reservoir has no suitable breach to build lasher and has mass flood discharge, opening large orifice for flood discharge has great advantage.
对于库区无适宜垭口可兴建泄洪道，而泄洪量又较大的拱坝工程，在坝身中开设大孔口泄洪具有显著的优越性。