CN109729967B - Ecological weir - Google Patents
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- CN109729967B CN109729967B CN201910208864.5A CN201910208864A CN109729967B CN 109729967 B CN109729967 B CN 109729967B CN 201910208864 A CN201910208864 A CN 201910208864A CN 109729967 B CN109729967 B CN 109729967B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The embodiment of the invention provides an ecological weir, which overcomes the defect that the weir body of the ecological weir is damaged by frost heaving and cold shrinkage by utilizing a stack structure formed by stacking a structure formed by a bearing grid, a water retaining grid and a fixed framework and a plant biological bag; the water and sand permeating can reduce the damage of water flow to the weir body of the ecological weir, and simultaneously prevent silt from silting up to prolong the service life of the weir body of the ecological weir; filling plant growth bags in the fixed framework, and planting multicolor grass irrigation in the fixed framework to build an ecological landscape weir body; plants with different seasonal specialties of 'spring, summer, autumn and winter' are planted on the ecological weir body and in the planting zone of the channel according to the seasonal variation characteristics of the colors of the plants, and the landscape streamer is built.
Description
Technical Field
The invention relates to the technical field of treatment of water and soil erosion gullies of hilly mountains, in particular to an ecological weir.
Background
The erosion gully is treated by adopting grouted stones or dry masonry weirs. The dam is damaged in the north due to deformation and cracks of the dam caused by frost heaving and cold shrinking circulation in spring and autumn. Most of dry/grouted stone materials have no water permeability, and have the defects of continuity and no life of blocking the cooperative movement of water flow and sediment, thus not meeting the requirement of ecological restoration.
Because the water pollution is increasingly serious, the erosion gully treatment enters the ecological restoration era. In order to meet the requirements of the times, various ecotype or water purification type modified weirs are invented. But current improved generation weir body still function singleness only can carry out the function of sediment trapping silt ground, in case the breach is difficult to be restoreed, the management is maintained the difficulty, and has because of silt siltation blocks the weir body and leads to ecological function loss such as quality of water purification, view effect poor shortcoming, and then influences the weir body life-span.
Disclosure of Invention
The invention aims to provide an ecological weir body construction technology which can meet the requirement of maintaining the cooperative motion rule of channel water flow and sediment, has long service life and can build a beautiful landscape streamer from waster and waste channels by utilizing vegetation colors.
In order to solve the technical problems, the invention adopts the technical scheme that: an ecological weir comprises a bearing grid positioned at the bottom, a water retaining grid positioned on the bearing grid, a fixed framework and a plant growth bag;
furthermore, the plane of the water retaining grid is perpendicular to the plane of the bearing grid, the two sides of the top edge of the water retaining grid, which are parallel to the bearing grid, are respectively connected with a support, and the supports form a fixed framework;
furthermore, plant bags are uniformly laid on the bearing grid, the plant bags are stacked from bottom to top to form a stack body, the stack body is matched with the fixed framework, the fixed framework corresponds to the stack body one by one, and the ratio of the stack body is consistent with that of the fixed framework;
furthermore, humus and plant seeds and/or seedlings are filled in the plant growing bag, and the bag body of the plant growing bag is made of geotextile;
furthermore, the ecological weir device also comprises a channel, wherein a plurality of ecological weirs are arranged in the channel; the two ends of the water retaining grid are provided with extension blocks; the extension blocks are embedded into two side walls of the channel;
further, a plurality of plant growing bags stacked along the side wall of the channel form a stack body, and the stack body comprises a plurality of plant growing bags;
further, a planting belt is further arranged in the channel and is positioned at the upstream and downstream of the channel where the ecological weir is positioned and/or between the weirs of the ecological weir;
further, the planting belt is used for planting at least one of trees, shrubs and herbaceous plants;
further, the arbor comprises at least one of malus micromalus, apricot tree, plum tree, robinia pseudoacacia, lilac, cotinus coggygria, acer truncatum and Chinese pine;
further, the shrub includes at least one of forsythia, mallow, hippophae rhamnoides, rhaponticum carthamoides and sabina vulgaris;
further, the herbaceous plant comprises at least one of day lily, leymus chinensis and alfalfa;
furthermore, riprap is laid in a preset range outside the ecological weir body.
The invention has the beneficial effects that: the stack body structure formed by stacking the structure formed by the bearing grating, the water retaining grating and the fixed framework and the plant growing bag overcomes the defect that the weir body of the ecological weir is damaged by frost heaving and cold shrinkage; the water and sand permeating can reduce the damage of water flow to the weir body of the ecological weir, and simultaneously prevent silt from silting up to prolong the service life of the weir body of the ecological weir; filling plant growth bags in the fixed framework, and planting multicolor grass irrigation in the fixed framework to build an ecological landscape weir body; plants with different seasonal specialties of 'spring, summer, autumn and winter' are planted in the planting zones between the ecological weir bodies and between the stacks according to the seasonal variation characteristics of the colors of the plants, and landscape strips are created.
Drawings
Fig. 1 is a longitudinal sectional view schematically illustrating an ecological weir of the present invention.
Fig. 2 is a side schematic view of an ecological weir of the present invention.
Fig. 3 is a schematic top view of an ecological weir of the present invention.
Fig. 4 is a detailed view of a longitudinal section of an ecological weir of the present invention.
Fig. 5 is a schematic longitudinal section view of an ecological weir of the present invention in further detail.
Fig. 6 is a top view of an ecological weir of the present invention in detail.
Fig. 7 is a schematic view of an embodiment of an ecological weir of the present invention.
Fig. 8 is a schematic view of yet another embodiment of an ecological weir of the present invention.
In the drawings: 1. a load-bearing grid; 2. a water retaining grid; 3. fixing the framework; 4. planting a belt; 5. planting a biological bag; 6. a stack body; 7. a lengthening block; 8. stone throwing; 9. a herbaceous plant; 10. shrubs; 11. a trench slope; 12. a channel; 13. the long side of the plant growth bag; 14. and (4) a tree.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an ecological weir includes: the plant growth device comprises a bearing grid 1 positioned at the bottom, a water retaining grid 2 positioned on the bearing grid 1, a fixed framework 3 and a plant growth bag 5.
Referring to fig. 2, the plane of the water retaining grid 2 is perpendicular to the plane of the bearing grid 1, the top edge of the water retaining grid 2 and two opposite parallel sides of the bearing grid 1 are respectively connected with a bracket, the bracket connects the water retaining grid 2 and the bearing grid 1 to form a fixed framework 3, and in a side view, the fixed framework 3 and the bearing grid 1 which are connected with each other are triangular.
In a preferred example, the support is a steel pipe, and the bearing grating 1 and the water retaining grating 2 are made of steel.
Referring to fig. 5, plant growth bags 5 are uniformly laid on the bearing grid 1, the plant growth bags 5 are stacked from bottom to top to form a stack body 6, the stack body 6 is matched with the fixed framework 3, the fixed framework 3 corresponds to the stack body 6 one by one, and the specific drop of the stack body 6 is consistent with that of the fixed framework 3; the stacking body 6 is formed by stacking the plant biological bags 5, any stacking body 6 in the stacking bodies 6 is provided with a fixing framework 3 matched with the stacking body 6, and the fixing framework 3 is used for fixing the corresponding stacking body 6.
In an optional embodiment of the present invention, the plant growth bag 5 is filled with humus and plant seeds and/or seedlings, and a bag body of the plant growth bag 5 is made of geotextile.
In an alternative embodiment of the present invention, referring to fig. 1 and 6, the present invention further comprises a trench 12, wherein a plurality of ecological weirs are disposed in the trench 12; and the two ends of the water retaining grid 2 are provided with extension blocks 7, and the extension blocks 7 are embedded into the two side walls of the channel 12.
In an alternative embodiment of the invention, a plurality of plant growth bags 5 stacked along the side walls of the channel 12 form a stack 6 parallel to the side walls of the channel 12, the stack 6 comprising a plurality of stacks.
In an alternative embodiment of the present invention, referring to fig. 1 and 3, the trench 12 further comprises a planting belt 4 therein, the planting belt 4 is located at the upstream and downstream of the trench 12 where the ecological weir is located and/or between ecological weir weirs; when there is only one ecological weir in the trench 12, the planting belt 4 is located upstream and/or downstream of the ecological weir; when there is more than one ecological weir in the trench 12, the planting belt 4 further comprises a trench section between the ecological weirs.
In an alternative embodiment of the invention, at least one of the trees 14, shrubs 10 and herbs 9 is planted in the planting belt 4.
In an alternative embodiment of the present invention, the tree 14 comprises at least one of malus micromalus, apricot tree, plum tree, acacia, lilac, cotinus coggygria, acer truncatum, and pinus tabulaeformis.
In an alternative embodiment of the invention, the shrubs 10 comprise at least one of forsythia suspense, mallow, hippophae rhamnoides, daphne giraldii and sabina vulgaris.
In an alternative embodiment of the present invention, the herbaceous plant 9 comprises at least one of day lily, leymus chinensis and alfalfa.
In an alternative embodiment of the invention, a riprap 8 is laid outside the ecological weir, i.e. within a preset range of the trench bottom.
In a preferred example, the riprap 8 is laid in the range of 0-3m, and the riprap 8 is a stone block with the grain size of 150-400 mm.
In a preferred embodiment of the invention, a ditch section with a ditch bottom and a bank slope with good topography and geological (soil texture) conditions and no messy stone sundries which are difficult to remove is preferably selected, and the ratio of the ditch bottom is reduced by more than 5% -10%, and an area with a small belly is searched for building an ecological weir; after the area is selected, the area is cleaned of riprap sundries, the bearing grating 1 is laid at the bottom of the trench 12, and the bearing grating 1 is laid along the water flow direction; referring to fig. 2, the direction of water flow is from right to left. The side facing the upstream, which contacts the water flow first, is the water-facing side (surface), the side facing the downstream, which contacts the water flow later, is the water-backing side (surface); the upstream face specific drop (vertical height: horizontal length) should be less than or equal to 1:2, if the backwater face drainage quantity is larger, in order to prevent erosion to the weir body base of the ecological weir, the backwater face specific drop should also be less than or equal to 1:2, so that the specific drop of the buttress body 6 is consistent with that of the fixed framework 3.
The two ends of the water retaining grid 2 are provided with the extension blocks 7, the trench 12 is dug and backfilled properly, the extension blocks 7 left at the left end and the right end of the water retaining grid 2 are buried and fixed, so that the extension blocks 7 are embedded into the side wall of the trench 12, and the stability is improved; steel pipes are respectively welded from the top edge of the water retaining grid 2 to two relatively parallel sides of the bearing grid 1, namely a water facing side and a water backing side, the water retaining grid 2 and the bearing grid 1 are connected through the steel pipes to form a fixed framework 3, and the steel pipes connected with each other and the bearing grid 1 are in a triangular shape in a side view.
Preferably, plant biological bags 5 are uniformly laid on the bearing grid 1, the plant biological bags 5 are stacked from bottom to top to form a stack body 6, the stack body 6 is matched with the fixed framework 3, the fixed frameworks 3 are in one-to-one correspondence with the stack body 6, namely, the stack body 6 is formed by stacking the plant biological bags 5, the stack body 6 comprises a plurality of stack bodies 6, and any one stack body 6 in the plurality of stack bodies 6 is provided with a steel pipe matched with the stack body 6 to form the fixed framework 3; referring to fig. 2, the gradient of the stack 6 is consistent with that of the fixed framework 3, namely, the side views of the interconnected steel pipes and the bearing grid 1 are triangular, and the side views of the stacked stack 6 and the bearing grid 1 are also triangular; the bearing grating 1, the water retaining grating 2 and the reinforcing framework 3 are matched with the stack bodies 6 into a group, each stack body 6 corresponds to a pair of gratings on the bearing grating 1 and the water retaining grating 2, and the width of each pair of gratings is approximately equal to 1/2-2/3 of the long side 13 of the plant growth bag 5 at the side contacted with the plant growth bag; because the water retaining grid 2 is vertical to the bearing grid 1, the stack body 6 needs to be stacked from bottom to top and from inside to outside, the inner side of the stack body is tightly attached to the water retaining grid 2, and the ratio of the stacked stack body 6 is consistent with that of the fixed framework 3 formed by welding steel pipes as far as possible; preferably, the long sides of the plant growth bags 5 are perpendicular to the water flow direction when stacked; the plant-growing bags 5 can be stacked up and down in a staggered manner from front to back by the plastic connecting buckles, so that the stability of the stack body 6 is improved.
Preferably, referring to fig. 1, the channel 12 is an inverted isosceles trapezoid, which is in this embodiment, but not limited to, an inverted isosceles trapezoid, and the specific channel 12 may have different forms according to the specific situation, and is preferably an inverted isosceles trapezoid in this embodiment; namely, the side wall of the channel 12 forms a groove slope 11, the plant biological bags 5 are stacked close to the groove slope 11 at the leftmost side and the rightmost side to form a stack body 6, the stack body 6 and the groove slope 11 are matched to form an inverted right-angled trapezoid, and the stack body is symmetrically arranged based on the water flow direction, so that the left and right groove slopes 11 are effectively prevented from being corroded.
Preferably, the planting belt 4 is further included in the channel, the planting belt 4 is positioned at the upstream and downstream of the channel 12 where the ecological weirs are positioned and/or between ecological weir bodies, and when only one ecological weir is arranged in the channel 12, the planting belt 4 is positioned at the upstream and/or downstream of the ecological weir body; when there is more than one ecological weir in the trench 12, the planting belt 4 further comprises a trench section between the ecological weirs.
Preferably, with reference to fig. 1, in a schematic longitudinal section, the gap width b between two adjacent stacks 6 is such that
And (3) restricting the width of the gap: b/D is more than or equal to 1max＜1.5～2.0
Wherein D ismaxThe diameter of the gravel of the largest stone in the upstream channel of the weir body.
At the same time, the ratio of the sum sigma B of all the gap widths to the total weir width B is to be satisfied
And (3) restraining the gap density: sigma B/B is 0.2-0.6
When the ecological weir is deployed in a group mode, relative gap widths between the stack bodies 6 of different weir bodies at the upper and lower reaches need to meet the principle that the upstream void ratio is large and the downstream void ratio is small, namely, the ecological weir meets the following requirements:
and (3) restricting the width of the gap: bOn the upper part/Dmax of＞bLower part/Dmax of
And (3) restraining the gap density: sigma bOn the upper part/BOn the upper part＞∑bLower part/BLower part
Wherein, bOn the upper partWidth of gap between 6 stacks of upstream weirs, Dmax ofThe diameter of the gravel corresponding to the largest stone in the upstream channel of the upstream weir body, bLower partWidth of gap between 6 stacks of downstream weirs, Dmax ofThe maximum stone particle diameter in the section of the channel 12 between the downstream weir and the upstream weir.
Preferably, referring to fig. 3, the direction of the water flow is from top to bottom, a weir body formed by combining a plurality of stacks 6 is paved on the ground in a channel 12 close to the upstream and the downstream surfaces of the ecological weir body, and riprap 8 is paved within the range of 0-3m, so that the base of the weir body can be effectively prevented from being eroded by the water flow.
The planting zone 4 can be planted with the channel 12 divided into four areas of spring, summer, autumn and winter according to the season phase change characteristics of the plant colors, as shown in table 1, the following plants are planted in the planting zone 4 respectively to build a landscape ribbon with the season characteristics
Table 1 is a planting table.
Preferably, the method of plant growing in a weir body:
wherein seeds of alfalfa, leymus chinensis and day lily are mixed in equal proportion in the plant growing bag 5; and the plant growing bag 5 which is close to the outermost part of the water facing side and the water backing side of the ecological weir body is transplanted with a shrub 10 seedling on the basis of the three herbaceous plants 9 in the table 1, and the variety is selected from the plants; preferably, the row spacing of the shrubs 10 is 0.5-1.5m, gaps among the stacks 6 are ensured as much as possible, and one shrub 10 can be planted on the water-facing side and the water-back side.
Planting shrubs 10 on the ground of the outer side channel 12 of the water facing side and the water backing side of the ecological weir body, preferably, the row spacing of the shrubs 10 is 0.5-1.5m, a plurality of rows can be planted, the row spacing is 0.5-1.5m, and the planting is carried out in a staggered manner; the seeds or seedlings of the herbaceous plants 9 can be sown on the gaps between the shrubs 10, and the shrubs 10 and the herbaceous plants 9 are selected from the plants.
Preferably, the planting method is implemented in the planting zone 4:
planting method of arbor 14: referring to fig. 7, if the width w of the planting zone 4 is more than or equal to 5m, selecting one or more kinds of arbors 14, planting the arbors 14 at the bottom of the left side slope and the right side slope side by side, wherein the distance between the arbors 14 at one side is 2-3 m; when multiple tree species are mixed and planted, the alternating planting sequence is adopted, and the left side and the right side are staggered once in the tree species sequence; referring to fig. 8, when the width w of the planting zone 4 is more than or equal to 2m and less than 5m, the trees 14 are planted on the slope bottoms of the left side and the right side in a staggered manner, the distance between the projection position of the tree 14 on the left side of the planting zone 4 on the right side and the tree 14 on the right side is still 2-3m, and if multiple trees are planted in a mixed manner, a fixed sequence is adopted along the trend of the planting zone 4, and the trees are planted alternately in a left-to-right advancing manner; if the width w of the planting zone 4 is less than 2m, arbor 14 is not suitable for planting.
The planting method of the shrub 10 comprises the following steps: when the width w of the planting belt 4 is more than or equal to 2m, selecting one or more shrubs 10 to be planted among the single-side trees 14, wherein the bottoms of the left and right ditches need to be planted; when multiple varieties are mixed and planted, the sequence of alternate planting is adopted, but the shrubs 10 on the left side and the right side do not need to be planted in a staggered manner, so that the arrangement is uniform and consistent, and the visual appearance is attractive; the distance between the shrubs 10 is set to 0.5-1.5m according to the size of the adult plant of the shrubs 10, and the distances between the shrubs 10 and the trees 14 are consistent. When the width w of the planting belt 4 is less than 2m, shrubs 10 are not suitable for planting.
The planting method of the herbaceous plant 9 comprises the following steps: selecting one or more than one herbaceous plants 9, and sowing seeds or seedlings in gaps between trees 14 and shrubs 10; or directly on the bottom of the trench 12.
And (4) planting plants in the planting zone 4 in the channel 12 while constructing the ecological weir. According to the designed scheme, different arbor and shrub grasses which accord with spring, summer, autumn and winter are planted on two sides of different sections of the channel 12 to form the landscape ribbon with ornamental value.
The invention also considers the aspect of beautifying the landscape in the ditch erosion repairing work. Through the plant growth bags 5 filled with plant seeds and arbor and shrub vegetation with season change matched in the planting belts 4, the function of fixing soil by using plants is achieved, landscape ribbons are formed, and the ornamental property of the landscape in the channels 12 is improved. The adopted grass and wood varieties have higher economic benefit, are beneficial to building beautiful villages, promote the development of regional ecological tourism and increase the economic income of farmers; in addition, the design of the permeable and sand-permeable ecological weir body ensures the movement of water and sand under normal runoff, and prolongs the service life of the ecological weir body.
The invention has the beneficial effects that: the stack body 6 structure formed by stacking the structure formed by the bearing grating 1, the water retaining grating 2 and the fixed framework 3 and the plant biological bag 5 overcomes the defect that the weir body of the ecological weir is damaged by frost heaving and cold shrinkage; the water and sand permeating can reduce the damage of water flow to the weir body of the ecological weir, and simultaneously prevent silt from silting up to prolong the service life of the weir body of the ecological weir; filling plant growth bags 5 in the fixed framework 3, and planting multicolor grass irrigation in the fixed framework to build an ecological landscape weir body; plants with different seasons of 'spring, summer, autumn and winter' are planted in the planting zones 4 in the weir bodies of the ecological weirs and between the stacks 6 according to the season change characteristics of the plant colors, and landscape ribbon is built.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The ecological weir provided by the invention is described in detail above, and the principle and the implementation mode of the invention are explained in the text by applying specific examples, and the description of the examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An ecological weir, comprising: the device comprises a bearing grid positioned at the bottom, a water retaining grid positioned on the bearing grid, a fixed framework and a plant growth bag;
the plane of the water retaining grid is vertical to the plane of the bearing grid, the grids in the water retaining grid are vertically vertical to the bearing grid, two sides of the top edge of the water retaining grid, which are parallel to the bearing grid, are respectively connected with a support, and the supports form a fixed framework; the fixed framework and the bearing grating are in triangular shapes;
plant biological bags are uniformly laid on the bearing grid, the plant biological bags are stacked from bottom to top to form a stack body, the stack body is matched with the fixed framework, the fixed framework corresponds to the stack body one by one, and the ratio of the stack body is consistent with that of the fixed framework; stacking the stack body from bottom to top and from inside to outside, wherein the inner side of the stack body is tightly attached to the water retaining grid, so that the stack body ratio drop of the stack body is consistent with the fixed framework ratio drop; when stacking, the long edge of the plant growth bag is perpendicular to the water flow direction; the stacks are spaced apart; the channel is in an inverted isosceles trapezoid shape, a channel slope is formed on the side wall of the channel, the leftmost side and the rightmost side of the channel are tightly attached to the channel slope to stack the plant growing bags to form a stack body, and the stack body is matched with the channel slope to form an inverted right-angle trapezoid.
2. The ecological weir of claim 1, wherein the plant growth bags are filled with humus and plant seeds and/or seedlings, and the bags are geotextiles.
3. The ecological weir of claim 1, wherein a plurality of ecological weirs are disposed within the channel; and the two ends of the water retaining grid are provided with extension blocks which are embedded into the two side walls of the channel.
4. The ecological weir of claim 3, wherein a plurality of plant growth bags stacked along the sidewall of the channel form a stack, the stack comprising a plurality.
5. The ecological weir of claim 3, further comprising a planting strip in the channel, the planting strip being located upstream and downstream of the channel and/or between the ecological weir weirs.
6. The ecological weir of claim 5, wherein the planting belt is used to plant at least one of trees, shrubs and herbs.
7. The ecological weir of claim 6, wherein the trees comprise at least one of malus micromalus, apricot trees, plum trees, acacia, lilac, cotinus coggygria, acer truncatum, and Chinese pine.
8. The ecological weir of claim 6, wherein the shrubs comprise at least one of forsythia suspense, malpighia virginiana, hippophae rhamnoides, russian elderberry and sabina vulgaris.
9. The ecological weir of claim 6, wherein the herbaceous plants include at least one of daylily, leymus chinensis and alfalfa.
10. The ecological weir of claim 1, wherein riprap is laid within a predetermined range outside the ecological weir.
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| CN107794884A (en) * | 2017-11-08 | 2018-03-13 | 大连汇洋船务工程配套有限公司 | A kind of net formula water surface safety barrage system |
| CN207435997U (en) * | 2017-11-08 | 2018-06-01 | 王仲伟 | Slope wall for hydraulic engineering |
| CN109113032A (en) * | 2018-09-27 | 2019-01-01 | 华北电力大学 | A kind of removable river sediment trapping weir of ecological type |
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