Plant sand storage and fixation system for hill valley of collapsed hillock area
A valley and plant technology, which is applied to the construction and operation of vegetation systems in hills and valleys, can solve the problems of limited plant implementation area and limited sand retention effect, and achieve the effects of increasing surface vegetation coverage, high cost performance and reducing erosion.
Active Publication Date: 2020-04-07
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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Problems solved by technology
However, most of the current plant measures for collapsed hills are implemented in the catchment areas, ditches, and diluvial cones of the collapsed hills. Due to the limited area of the planted area, the sand-retaining effect is also limited.
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Embodiment Construction
[0025] The present invention will be further described in detail below in conjunction with specific examples.
[0026] Embodiment Benggang group plant storage and sand fixation system
[0027] The invention provides a method for constructing a system for retaining and sand-fixing plants in the Bengang group by improving the surface roughness and changing the flow state of the surface runoff. The implementation site is Huacheng Town, Wuhua County, Guangdong Province. The specific steps are as follows:
[0028] 1) Site selection for hilly and ditch land. Select the exposed Benggang sandy land that is currently non-agricultural land, based on the area of the Bengang group and the average erosion modulus (50000t·km -2 ·a -1 ), the area of the plant-sediment-retaining system is determined to be the hills and valleys of the Bengang Group with a size of 110m×25m.
[0029] 2) Micro-topographic transformation of gully land. Due to sediment deposition, the terrain in this area ...
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Abstract
The invention discloses construction and operation of a vegetation system for intercepting and fixing collapsed hillock sediment by changing the surface roughness and runoff flow state of a collapsedhillock valley. Local anti-burying pressure and barren-resistant local plants are screened and utilized, the roughness of an underlying surface is increased, and centralized surface runoff (stranded flow) is dissipated into surface overflow, so that the sand carrying capacity of the surface runoff is reduced, and the collapsed hillock sediment is effectively intercepted and stabilized. Compared with engineering measures, the system is low in investment cost, simple and feasible, is easy to accept and popularize by local people, and is particularly suitable for treatment of remote collapsed hillock areas which are inconvenient in traffic and difficult to reach by large machinery, and human intervention during operation is less.
Description
technical field [0001] The invention belongs to the field of water and soil erosion control, and in particular relates to the construction and operation of a hilly and valley vegetation system that stores and fixes collapsed silt by changing the surface roughness and runoff flow state of the collapsed hills and valleys. Background technique [0002] The word "Benggang" originated from the title of "chair-shaped collapsed cliff landform in the source catchment area of gullies and gullies in hilly and mountainous areas" in Meizhou, Guangdong Province. The total area of collapsed hills distributed in seven provinces (autonomous regions) in southern my country is about 1220 km 2 , the total number is 239,100, and the direct damage and impact area of collapsed hills is 19,500 km 2 . In addition, the distribution of collapsing hillocks is generally relatively concentrated, making collapsing hillock erosion the most intense and harmful erosion type in the tropical and subtr...
Claims
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Patent Timeline
Login to View More IPC IPC(8): A01B79/02E02D3/00
CPCA01B79/02E02D3/00Y02P60/20
Inventor 廖义善袁再健郑明国黄斌谢真越吴新亮
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI