China has built more than 87,000 reservoirs of various types and the number of reservoirs ranks first in the world. During the "12th Five-Year Plan" period (2011 to 2015), with the economic development, China will build a number of reservoirs. Among them, more than 500 large and medium-sized reservoirs will be built in the southwest alone.
Most of the existing reservoirs in China were built in the 50s and 70s of the last century. Due to the limited economic and technological conditions at that time, the construction of reservoirs was congenitally deficient. Combined with decades of operation, the problem of dangerous and dangerous diseases prevailed and it was a nuisance that affected the safety of flood control. In the past three years, China has invested more than 620 billion yuan in the elimination of dangerous reinforcement of 7,356 critical reservoirs.
Yong Yong said that after the dangerous reservoirs were reinforced and removed, safety hazards were eliminated. In 2010, rare historical storms and floods occurred in various regions of the country, and the reservoirs reinforced by disasters have withstood the test of flooding. In recent years, there is no large or medium-sized reservoir dam.
The official pointed out that after the reinforcement of dangers, the flood control standards for reservoirs have been raised, basically eliminating the threat of dam flooding in 637 cities above the county level, 161 million mu of farmland, and a large number of important infrastructure, and protecting the lives of 144 million people in the lower reaches of the reservoir. Property Safety; The reservoir capacity of 9.8 billion cubic meters was restored, and the ability of water resources to regulate and resist drought was enhanced. In the severe droughts that occurred in parts of China in the past two years, these reservoirs have played an important role in water supply and drought relief.
However, there are still more than 46,000 dangerous reservoirs in China that need to be reinforced. These dangerous reservoirs are almost all small reservoirs. Yong Yong stated that with the intensification of global climate change, frequent extreme weather, and severe storms and floods, small-size dangerous reservoirs have become the prominent weak link in current flood control engineering systems. In order to complete the reinforcement and reinforcement tasks, the central government will invest about 55 billion yuan in the next five years, and local governments will also provide some funds.
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