Exploitation and harnessing method for multi- sand broad-river reach, trench, beach and reservoir

Abstract

The invention relates to a developing and governing method for a sandy wide channel canal/shoal/pool. A narrow river channel is formed by two main dikes (new flood dikes) which are constructed between the prior flood dikes at two sides of a sandy channel segment along the riverway trend, and large dams are constructed at the upstream and the downstream. A water supply and sand diversion canal is constructed at the inside or outside of at least one of the main dikes in the narrow river channel. A conveyance and navigation canal is constructed outside one or two sides of the narrow river channel. The conveyance and navigation canal is adjacent to the water supply and sand diversion canal or the conveyance and navigation canal, or the conveyance and navigation canal is a split type. The bottomland and the pool surrounded by the diking are changed from the shoal area between the main dike or canal dike and the prior flood dikes. The bottomland can be a permanent site for living, production, construction and development. The long-term reserved pool is capable of storing water resource and supplying water in non-flood season, storing floodwater and replenishing dryness in flood season, and detaining and storing the flood. The developing and governing method for the sandy wide channel canal/shoal/pool effectively prevents from flood, treats and uses slit, ensures the security in flood prevention, and supplies enough rinsing water source; the water service cost is low, and the method is capable of developing and utilizing the resources such as hydraulic power, shipping, and tourism, etc. in the channel segment, and the method has a positive meaning in improving environment.

Description

1. Technical field: [0001] The invention relates to a method for development and management of sandy river sections in the technical field of water conservancy engineering, in particular to a method for development and management of canal channels and beach reservoirs in wide sandy river sections. 2. Background technology: [0002] In 1855, the lower reaches of the Yellow River diverted at the Tongwaxiang breach, taking the Daqing River into the Bohai Sea in Kenli County, Shandong Province to form the current channel. The channel is 878km long, with a drop of about 118m. The river channel is wide at the top and narrow at the bottom, the gradient is steep at the top and slow at the bottom, and the flood discharge capacity is large at the top and small at the bottom. There are 3544km of beaches in the river 2 , Accounting for 84% of the river area, more than 1.8 million people live in Henan and Shandong provinces. Over the past 150 years, when the Yellow River was still a na...

AI Technical Summary

Problems solved by technology

At the same time, the irrigation and water supply of the downstream Yellow River diversion have not been well developed due to the limitation of sediment and water sources. According to statistics, the total design capacity of the downstream Yellow River diversion sluice is more than 3300 m 3 / s, the main water diversion canal can generally only lead to 60% of the designed flow capacity, and the actual water diversion is 110m per year 3 About 120 million tons of sand is diverted; the designed irrigation area is more than 3 million hm 2 , the actual irrigated area is less than 2 million hm 2

[0007] In addition, in the "wide river" state, not only the hydropower resources of hundreds of thousands of kilowatts in the downstream wide river section cannot be developed and utilized, but also because the mainstream swings back and forth, the water depth is too shallow, and even the most basic navigation function of the river cannot be used in the wide river. segment can not be achieved

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