Historical Evolution of Qiu Feng Reservoir

Historically, floods and droughts occurred frequently on both sides of the middle and lower reaches of Liang Ying, with heavy rains reaching more than 100mm, and floods often washed away dikes and spilled into Lianjiang Plain. In case of drought, the upstream source dries up, and Lianjiang salt tide surges up, resulting in drought and salinization. It is not uncommon to compete for water in past dynasties.

After the founding of People's Republic of China (PRC), the people urgently demanded the construction of a reservoir, and the people's government put it on the agenda and organized many investigations. 1952 Retain immigrant houses and cultivated land during land reform; 1June, 956, the county party congress passed the resolution to build the Qiu Feng Reservoir, and established a "preparatory committee" with Guo Chun as the director (the first secretary of the county party committee); 1957 for resettlement work in the reservoir area; In July 1958, the project officially started. More than 10,000 migrant workers from Liang Ying, Simapu, Xiashan, Wugang, Heping, Chendian and Tongyu went to the construction site and worked in three shifts day and night. At that time, a large number of projects in the county were launched at the same time, and human and material resources were extremely scarce. However, the people in the beneficiary areas showed great enthusiasm and everything was subordinate to the needs of reservoir construction. During the typhoon and rainstorm in September 1959, the flood soared to a height of 38.38 meters. At that time, the elevation of the earth dam crest was only 40.06 meters, and the wind and waves splashed over the dam crest. More than 4,000 cadres and masses braved the wind and rain to avoid a catastrophic dam break, regardless of the disaster at home. 1959 Summer, 10 June Earth dam was completed, and more than 20,000 migrant workers were organized to support the irrigation channel project. By the summer of 1960, the trunk and branch passages 100 kilometers were completed. In the more than 40 years after the completion of the reservoir, the reservoir has been reinforced, expanded and matched many times, mainly 1964- 1965. After the completion of the dam, the hydropower station will supply power for drainage and irrigation in waterlogged areas; With the expansion of the reservoir, the earth dam is raised by 2 meters, the water surface is widened by 4 meters, and the canal system and buildings in the irrigation area are comprehensively reformed and strengthened, so that the irrigation area reaches 6.5438+0.02 million mu, and the reservoir check standard reaches once in 200 years. 1975 to 1976, floods within 27 square kilometers of Shangjinxi and Li Pei reservoirs were intercepted and introduced into Qiu Feng Reservoir, and then discharged into the South China Sea through Yuanshan Gate. The construction of the upstream Hongchang Reservoir will make the safety standard of autumn wind once in a thousand years. Over the past 40 years (not including Nanshan flood control and Red Square project), more than 3.4 million cubic meters of earth and stone have been completed, and the earthwork110.5 million cubic meters has been invested, and more than 9.6 million man-days have been invested to build this multi-functional hub project. The main benefits are as follows: the mountain torrents in the control interval 105. 1 km2 are directly discharged into the South China Sea (accounting for the cost) to recover the tail water of the third-stage hydropower generation in the upstream Red Square, which improves the power generation of the power station behind the dam and becomes the main power generation of the county power grid. The accumulated four cascade power stations have generated 102234000 kWh since they were put into operation. At this time, it also provides production water for county fish fry farm, eel farm and cloth factory. By 1990, the accumulated production and living water175.7 billion cubic meters and power generation water14.68 million cubic meters will be provided. 199 1, the autumn wind water plant in 96 villages of 5 towns in Lianjiang area started. After the completion of this project, as the largest water supply system in eastern Guangdong, Nanshan Qingquan will be delivered to thousands of households in Lianjiang Plain through the water pipe network, improving the drinking water source for more than 500,000 people. Since then, the economic, social and environmental benefits of Qiu Feng Reservoir have become more obvious.

Because the reservoir construction was limited by the historical conditions at that time, the design standard was low and the quality was poor. Although it has been reinforced, expanded and built for many times, the main buildings are still in danger to varying degrees, and it was identified as a third-class dangerous dam in 2000.

In order to eliminate the hidden danger of reservoir safety and reach the safety standard, in 2002, with the approval of the province, it was agreed to invest 52.66 million yuan, designed according to the 50-year flood standard, checked according to the 100 flood standard, and reinforced.