Abstract: The stability of outfall sea-bed bottom is the guarantee of the power plant drainage infrastructure security.By model tests,we study the problems of mobile-bed scour and protection stones stability of Houshi Power Plant.The test results show that when the two outfalls are operating at full load,scour pools and gullies appear in outfall areas,and serious erosion will appear in the area 50 m away from the head of the dyke of the open drainage channel with a maximum scour depth of 9.0 m.The stability research ...