Banqiao Dam discharge of the reservoir is 15000 m/s (about 3.96 million gallons/s). After the disaster of the Banqiao dam failure, the Chinese government became very focused on surveillance, repair, and consolidation of reservoir dams. China has 87,000 reservoirs across the country; most of which were built in the 1950s–1970s using low construction standards. Most of these reservoirs are in serious disrepair, posing challenges to the prevention and control of flood-triggered geological disasters in areas with a population of 130 million or more. China's medium and small rivers are considered to be the Achilles' heel in the country's river control systems. According
Natural disasters in Japan Natural disasters in Japan Japan is one of the countries most affected by natural disasters. Two out of the five most expensive natural disasters in recent history have occurred in Japan, costing $181 billion in the years 2011 and 1995 only. Japan has also been the site of some of the 10 worst natural disasters of the 21st century. The types of natural disasters in Japan include tsunamis, floods, typhoons, earthquakes, cyclones, volcanic eruptions, hailstorms, tornadoes, thunderstorms, lightnings, nuclear explosions and other natural disasters including the related geotectonic phenomena. The country has gone through many years of natural disasters, affecting