The catastrophic flood event '95.7' in Liaoning province, China

摘要

In this paper the whole processes of flood defence for the catastrophic flood event that occurred in July 1995 in Liaoning Province, China is analyzed. A scientific regulation of large-sized reservoirs, especially the successful real-time forecast for the Dahuofang Reservoir was conducted. This paper summarizes the characteristics of flood events occurred in July 1995in different regions of Liaoning Province and raises the countermeasures for floods in various river catchments. Starting from the last ten-day period of July through the middle ten-day period of August in 1995, heavy rains and storms happened in most parts of Liaoning Province, especially cloudbursts and extraordinary storms occur in the middle and east part of Liaoning Province. Because of the abruptness of the heavy stormscharacterized by the high intensity, large scope and long duration, the river floods in the Liaohe, Hunhe, Taizi and Yalu Rivers raised rapidly. In the Hunhe River the maximum occured flood in history. In the Yalu River occured the first big flood occurs since the founding of PRC. In the downstream of the Liaohe River the third big floods occured next to that in 1951 and 1953. Namely the heavy storms resulted in the flood and waterlogging disasters scarcely seen in history in the catchments of these rivers. During the flood , under the guidance of the state Headquarters of Flood Defence and Combat Against Drought, and the related agencies and with the strong support from the People's Deliberation Army and the Armed Police, the provincial administration mobilized and organized all the people to devote into the struggle against the flood which lasted over twenty days and nights, finally won five battles of upper the Liaohe River, the Hunhe River, the middle and lowe Liaohe River, the Yalujiang River, and storm drainage in the middle region, resulted in a decisive victory i.e. nonexclusive in more than 900 reservoirs, none of the 60 and more cities suffered from inundation, none of big rivers within the designed standard suffered from bank breaks, and the losses in the submerged farmland diminished to the minimum.