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Plant management method for controlling transport of sandstone small watershed channel silt

A technology of sediment transport and small watershed, applied in the fields of botanical equipment and methods, plant cultivation, soil protection, etc. The effect of improving soil and sand fixation and water storage capacity, fast and large-scale survival, and improving survival rate

Inactive Publication Date: 2015-03-04
TIANJIN CHENGJIAN UNIV
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AI Technical Summary

Problems solved by technology

However, the construction of check dams cannot improve the lateral erosion behavior of the channel, and may even deepen the lateral erosion of the channel upstream of the check dam, thereby aggravating the slope collapse; the seabuckthorn flexible dam studied by Bi Zifen has achieved good results, but in today's arsenic sandstone When the local ecological situation changes, it is obviously inappropriate to blindly develop the pioneer species of seabuckthorn. The species is single, and it also causes a large area of ​​pests and diseases.
In addition, as a flexible dam, seabuckthorn has a wide planting area, and the construction is troublesome. If the collected water flow is too large when it rains, it needs to be replanted.
More importantly, the seabuckthorn flexible dam is aimed at coarse particles and cannot effectively intercept small particles of sediment

Method used

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  • Plant management method for controlling transport of sandstone small watershed channel silt
  • Plant management method for controlling transport of sandstone small watershed channel silt
  • Plant management method for controlling transport of sandstone small watershed channel silt

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Embodiment 1

[0036] 1) Select a river channel in the small watershed of the Pisha Sandstone area, and the straight-line distance between the banks on both sides is between 4.1 and 5.6m. There is more silted sand on one bank of the river channel, and the other bank is close to the slope, and there is side erosion. Measure the width and length of the canal and calculate where to plant the plants.

[0037] 2) Select the shrub Salix salix and the herbaceous plant Leymus chinensis that are suitable for local growth and can be planted on a large scale in the sandstone area. According to the V shape, the row spacing of shrubs in the unit is 2m, the spacing between plants is 0.5m, the spacing between shrubs is 1m, the spacing between units is 20m, and the spacing of herbaceous plants is 0.5m. The θ angle is controlled between 120° and 150°, and is biased towards the side where the water flow is less eroded; the length ratio between the two sides of the V shape is 1.2.

[0038] 3) Select 50cm-80c...

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Abstract

The invention discloses a plant management method for controlling transport of sandstone small watershed channel silt. The problem that an ordinary plant check dam cannot block fine sand and is short in service life is solved by adopting a symbiotic shrub grass matching mode and a specific planting form, and the soil-fixing, sand-fixing and water-holding capacity is improved; the method is convenient in construction and low in cost, the survival rate of plants can be greatly improved, the method does not threaten a weak ecological environment formed in a local area, and the method is suitable for being widely popularized and used; by the method, soil erosion and further transport of silt to downstream in a channel can be obviously reduced, meanwhile, water flow flushing is relieved, water is stored, soil is improved, and the method has an important significance in preventing silt transport and improving plant coverage percentage in the channel.

Description

Technical field: [0001] The method relates to a plant control method for preventing sediment transport in gullies in small watersheds of arsenic sandstone, and belongs to the technical field of ecological restoration in arid desertification areas. technical background: [0002] The arsenic sandstone belongs to a special landform structure in the Loess Plateau area, with red and white alternates, and is mainly distributed in the area centered on the border between Shanxi, Shaanxi and Mongolia. Due to the bare surface, coupled with the interaction of water erosion, wind erosion and gravity erosion, the local extremely serious soil erosion has become the main source of coarse sand in the middle reaches of the Yellow River. When there is no water, the arsenic sandstone is as hard as a rock, but when it meets water, it becomes soft and muddy in a very short time, and at the same time, it is severely eroded by wind. Because the terrain in this area is broken, the climate is dry, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00A01G1/00
CPCA01G22/00E02D3/00
Inventor 张磊冯伟风杨久俊王雪平
Owner TIANJIN CHENGJIAN UNIV
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