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Disaster prevention and control methods of high water level in the sedimentary section where the trunk and branches meet under the condition of strong sand coming from tributaries using side beach boulders to regulate sand

A technology for high water level and sediment deposition, which is applied in the direction of river regulation and climate change adaptation. It can solve the problems of water level rise and other problems, and achieve the effect of lowering the water level of the river, effectively controlling the range of sediment deposition, and reducing the amount and effectiveness of sand.

Active Publication Date: 2020-09-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there have been no reports of economical and effective disaster reduction measures for the silting of mountainous rivers and tributaries under the condition of strong sand in the flood season.

Method used

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  • Disaster prevention and control methods of high water level in the sedimentary section where the trunk and branches meet under the condition of strong sand coming from tributaries using side beach boulders to regulate sand
  • Disaster prevention and control methods of high water level in the sedimentary section where the trunk and branches meet under the condition of strong sand coming from tributaries using side beach boulders to regulate sand
  • Disaster prevention and control methods of high water level in the sedimentary section where the trunk and branches meet under the condition of strong sand coming from tributaries using side beach boulders to regulate sand

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Embodiment 1

[0053] In this embodiment, the method for preventing and controlling disasters caused by high water level in the sedimentation section at the junction of branches and branches under the condition of strong tributary flow provided by the present invention in detail is described in detail.

[0054] According to the method in Comparative Example 1, construct such as figure 2 model as shown, and follow the Figure 6 The layout of (A) and (B) shows that boulders are arranged in the upper reaches of the main stream. By arranging boulders on the side beach of the upstream channel of the main stream to regulate the transport of sediment to the downstream, so as to reduce the deposition of sediment in the downstream of the main stream channel. For the two arrangements of boulders, the amount of sediment incoming from the tributary is 1kg, and the calculated flow is 1.6L / s; the amount of sediment incoming from the tributary is 1.5kg, and the calculated flow is 1.6L / s; Under the four ...

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Abstract

The invention provides a high-water-level disaster-caused control method for sedimentation sections at the confluence of main-tributary streams by regulating sediment with marginal bank erratic boulders under high-intensity sediment from tributary streams. The high-water-level disaster-caused control method includes the steps of (1) selecting a main stream at the confluence of main-tributary streams requiring sediment regulation by the marginal bank erratic boulders as a target reach, wherein the target reach is a steep-gentle connection reach, a gully bed slope of an upper reach of the steep-gentle connection reach is greater than that of a lower reach, and a gully bed slope of a tributary stream at the confluence of main-tributary streams is greater than that of the upper reach of the steep-gentle connection reach; (2) surveying a position of a sediment accumulation body of the target reach at the confluence of main-tributary streams; (3) subjecting the erratic boulders to staggeredarrangement on a left marginal bank and a right marginal bank of the upper reach of the target reach, wherein the erratic boulders at the highest reach are positioned at the confluence of main-tributary streams and the upper reach of the sediment accumulation body at the confluence of main-tributary streams of the target reach. The high-water-level disaster-caused control method can improve the flood carrying capacity of the sedimentation sections at the confluence of main-tributary streams of mountain rivers under the high-intensity sediment from tributary streams.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation of silted sections of rivers in mountainous areas, and relates to a method for preventing and controlling disasters caused by high water levels in the silted section of the trunk and branch intersection under the condition of strong sand coming from tributaries by using side beach boulders to regulate sand. Background technique [0002] In recent years, a large amount of loose accumulation material has accumulated in the gully bed of the mountainous area in Southwest China. Under the influence of rainfall and other factors, a large amount of loose accumulation material often enters the tributaries in the form of collapse, landslide, debris flow, etc., changing the sediment of the main river channel. supply conditions. Main and branch rivers are affected by the sediment transport capacity of different river sections, resulting in siltation in some sections of the river, reducing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/02
CPCY02A10/00
Inventor 王协康雷明许泽星刘兴年
Owner SICHUAN UNIV
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