CN205740521U - The abrupt slope buffer strip step processing system of rain runoff collection and purification - Google Patents

Abstract

The steep slope buffer belt cascade treatment system for collecting and purifying rain runoff, the utility model belongs to the field of water body environment restoration, it aims to solve the problem that the rain runoff in the existing steep slope buffer belt has a short residence time, and a large amount of sediment and pollutants in the rain runoff enter the water body beyond the standard and cause water and soil pollution. Problems of runoff and water pollution. The cascade treatment system of the steep buffer zone forms arbor ecological hedges, first-level ecological filters, shrub ecological hedges, second-level ecological filters, herbaceous ecological hedges, third-level ecological filters and aquatic In the plant functional area, different plants are planted on the ecological hedges and ecological filters at all levels. The system slows down the slope of rain runoff on steep slopes by setting up cascade ecological hedges and aquatic plant functional areas. Through the configuration of plant diversity with deep and shallow root types, the dam is fixed to block sediment, and the rain runoff is prolonged through multi-level ecological filters. The residence time improves the water storage rate, infiltration rate and water purification efficiency.

Description

Cascade treatment system for steep slope buffer zone with rain runoff collection and purification

technical field

The utility model belongs to the field of water body environment restoration, in particular to a cascade treatment system for a steep slope buffer zone for efficient collection and purification of rain runoff.

Background technique

With the degradation of environmental ecology caused by human activities, the riparian (lakeside) buffer zone degrades and shrinks, with insufficient area and low function. Especially in the steep slope buffer zone, due to the short residence time of rain runoff and the large runoff per unit time, it cannot perform the function of ecological interception and purification, resulting in the ineffective storage of rainwater. One of the important factors of decline.

Utility model content

The purpose of this utility model is to solve the problems of the existing steep slope buffer belt rain runoff residence time is short, a large amount of sediment and pollutants in the rain runoff enter the water body to cause water and soil loss and water body pollution, and provide a high-efficiency rain runoff collection The purified steep slope buffer zone cascade treatment system and construction method.

The utility model steep slope buffer zone cascade treatment system for rain runoff collection and purification is composed of arbor ecological hedge, first-level ecological filter, shrub ecological hedge, second-level ecological filter, herbaceous ecological hedge, third-level ecological filter and aquatic plant functional area From high to low, a first-level ecological filter, a second-level ecological filter and a third-level ecological filter are dug step by step on the steep slope of the embankment, and an ecological tree fence is formed on the side of the first-level ecological filter facing the roadbed. , there are arbor plants planted on the dam surface of the arbor ecological hedge, a shrub ecological hedge is formed between the first-level ecological filter and the second-level ecological filter, shrub plants are planted on the dam surface of the shrub ecological hedge, and the second-level ecological A herbaceous ecological fence is formed between the filter and the third-level ecological filter, and herbal plants are planted on the dam surface of the herbal ecological fence. No. 1 aquatic plant is planted on the dam surface of the area, No. 1 substrate is filled in the first-level ecological filter and the second-level ecological filter, No. 2 substrate is filled in the third-level ecological filter, and No. 1 substrate is planted in the first-level ecological filter There are No. 2 aquatic plants, No. 3 aquatic plants are planted in the secondary ecological filter, and No. 1 aquatic plants are planted in the tertiary ecological filter.

The utility model completes the design of the cascade configuration structure of the steep slope buffer zone through the transformation of planting vegetation and spatial configuration of the steep slope buffer zone, the ecological hedges and ecological filter pools are arranged at intervals, and finally the aquatic plant functional area is set. The vegetation to be planted should choose plants with well-developed root system, strong water and soil fixation ability, and good water purification effect. The plants on the ecological fence can fix the rain runoff, block the sediment and purify the pollution. The ecological filter and the plants and substrates in it can prolong the residence time of the rain runoff and improve the water storage rate, infiltration rate and water quality. The role of purification efficiency.

The purpose of the utility model is to collect and purify rain runoff and prevent water body pollution, and carry out cascade configuration transformation on the existing steep slope buffer zone, so as to realize the functions of intercepting, collecting and purifying rain runoff. The utility model has strong operability, economy and applicability, obvious purification function, added buffer zone landscape beautification function, and has wide application prospects in the prevention and control of water body pollution in steep slope waters.

Description of drawings

Fig. 1 is the sectional view of the steep slope buffer zone cascade treatment system for rain runoff collection and purification of the utility model;

Fig. 2 is a top view of the steep slope buffer zone cascade treatment system for rain runoff collection and purification of the utility model.

detailed description

Specific implementation mode 1: The steep slope buffer zone cascade treatment system for collecting and purifying rain runoff in this embodiment consists of an arbor ecological fence A, a first-level ecological filter B, a shrub ecological fence C, a second-level ecological filter D, a herbaceous ecological fence E, and three The first-level ecological filter B, the second-level ecological filter D and the third-level ecological filter F are dug step by step on the steep slope of the embankment from high to low. The dam body of the ecological filter B facing the subgrade surface forms an arbor ecological fence A, and arbor plants 1 are planted on the dam surface of the arbor ecological fence A, forming between the primary ecological filter B and the secondary ecological filter D Shrub ecological fence C, shrub plants 2 are planted on the dam surface of shrub ecological fence C, herb ecological fence E is formed between the secondary ecological filter D and the tertiary ecological filter F, and the dam surface of herbaceous ecological fence E Herbaceous plants 3 are planted on the top, and the dam body on the side of the third-level ecological filter F facing the water surface forms an aquatic plant functional area G, and a No. 1 aquatic plant 4 is planted on the dam surface of the aquatic plant functional area G. B and the secondary ecological filter D are filled with No. 1 substrate Ⅰ, the tertiary ecological filter F is filled with No. 2 substrate Ⅱ, the primary ecological filter B is planted with No. 2 aquatic plants 5, and the secondary ecological filter No. 3 aquatic plant 6 is planted in filter D, and No. 1 aquatic plant 4 is planted in tertiary ecological filter F.

In this embodiment, along the slope of the steep slope of the buffer zone, the arbor ecological fence A, the first-level ecological filter B, the shrub ecological fence C, the second-level ecological filter D, the herbaceous ecological fence E, and the third-level ecological filter are sequentially formed from high to low. There are seven parts in pool F and aquatic plant functional area G.

In this embodiment, cascaded ecological hedges and aquatic plant functional areas are set up to slow down the slope of rain runoff on steep slopes, and plants are planted on them. Through the diversity of deep and shallow root types of plants, the fixed dikes, sediment and sediment are improved. The functional efficiency of purifying pollution; by setting up multi-stage ecological filters, filling them with substrates and planting aquatic plants, the residence time of rain runoff is prolonged, and the water storage rate, infiltration rate and water purification efficiency are improved. Through the configuration of biodiversity, the surface coverage and functional efficiency are improved, and the landscaping function of the buffer zone is also increased. Through the optimal configuration of space, the residence time of rain runoff is extended, and the water storage rate, infiltration rate and water purification capacity are improved.

Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the gradient α of the steep embankment slope is 15°-30°.

Specific embodiment three: this embodiment is different from specific embodiment one or two in that the arbor plant 1 planted on the dam surface of the arbor ecological hedge A is a weeping willow, and the No. 1 aquatic plant 4 is a reed.

Specific embodiment four: this embodiment is different from one of the specific embodiments one to three in that the shrub plant 2 planted on the dam surface of the shrub ecological hedge C is one or two mixed plantings in Spiraea, red Swiss wood.

Specific embodiment five: this embodiment is different from one of specific embodiments one to four in that the No. 2 aquatic plant 5 planted in the primary ecological filter B is one or two mixed plantings in canna and cattail.

Specific embodiment six: this embodiment is different from one of specific embodiments one to five in that No. 3 aquatic plant 6 is planted in the secondary ecological filter D, and is one or more mixed plantings in calamus, water onion, and iris.

Specific embodiment seven: this embodiment is different from one of the specific embodiments one to six in that the herbaceous plant 3 planted on the dam surface of the herb ecological fence E is one or more of Potassium microphyllum, Chittina chinensis, and Bluegrass Mixed planting.

Embodiment 8: This embodiment differs from Embodiments 1 to 7 in that the matrix I is gravel with a particle size of 5-20 mm, and the matrix II is pebbles with a particle size of 30-80 mm.

Embodiment 9: This embodiment differs from Embodiment 2 in that the dam crest of the aquatic plant functional area G is 20-40 cm higher than the water level, and the width of the aquatic plant functional area G is 37-80 cm.

Specific embodiment ten: the difference between this embodiment and specific embodiment two is that the height difference between the adjacent dam crests in the arbor ecological fence A, the shrub ecological fence C, the herbaceous ecological fence E and the aquatic plant functional area G is 25-50cm .

In this embodiment, the width distance of the arbor ecological fence A, the first-level ecological filter B, the shrub ecological fence C, the second-level ecological filter D, the herbaceous ecological fence E, the third-level ecological filter F and the G section of the aquatic plant functional area is 37 ~80cm.

Embodiment 1: The steep slope buffer zone cascade treatment system for rain runoff collection and purification in this embodiment consists of arbor ecological fence A, first-level ecological filter B, shrub ecological fence C, second-level ecological filter D, herbaceous ecological fence E, and third-level The ecological filter F and the aquatic plant functional area G are composed of the first-level ecological filter B, the second-level ecological filter D and the third-level ecological filter F on the steep slope of the dike from high to low. The dam body of filter B facing the subgrade surface forms an arbor ecological fence A, and an arbor plant weeping willow 1 is planted on the dam surface of the arbor ecological fence A, forming between the first-level ecological filter B and the second-level ecological filter D Shrub ecological hedge C, shrub spirea 2 is planted on the dam surface of shrub ecological fence C, and herbaceous ecological fence E is formed between the secondary ecological filter D and the tertiary ecological filter F. The dam surface of the dam is planted with herbaceous plants Michelia chinensis and Chrysanthemum 3, and the dam body of the third-stage ecological filter F facing the water surface forms an aquatic plant functional area G, and a No. 1 aquatic plant is planted on the dam surface of the aquatic plant functional area G. Plant reed 4, fill No. 1 matrix I in the first-level ecological filter B and second-level ecological filter D, fill No. 2 matrix II in the third-level ecological filter F, and plant No. 1 matrix II in the first-level ecological filter B No. 2 aquatic plant canna 5, No. 3 aquatic plant calamus and water onion 6 are planted in the secondary ecological filter D, and No. 1 aquatic plant reed 4 is planted in the tertiary ecological filter F.

In this embodiment, the first-level ecological filter B, the second-level ecological filter D, and the third-level ecological filter F are trapezoidal pits on the vertical section of the steep slope buffer zone.

This embodiment can be used for a steep slope buffer zone with a slope of 30°. The size of each component in the steep slope buffer zone cascade treatment system for rain runoff collection and purification is as follows: the aquatic plant functional area G is 30cm higher than the water level line, and the width L is 37cm; the width L (inner diameter) of the three-stage ecological filter F is 37cm , the depth is 15cm from the top of the aquatic plant functional area G; the overall height of the herbaceous ecological fence E is 60cm, and the width L is 37cm; the width L (inner diameter) of the secondary ecological filter D is 37cm, and the depth is 30cm from the top of the herbal ecological fence E; The shrub ecological hedge C is 105cm higher than the horizontal line, and the width L is 37cm; the width L (inner diameter) of the primary ecological filter B is 37cm, and the depth is 45cm from the top of the shrub ecological hedge C; the arbor ecological hedge A is 150cm higher than the horizontal line.

The high-efficiency rain runoff collection and purification steep slope buffer zone cascade treatment system described in this embodiment has the integrated functions of intercepting, collecting and purifying rain runoff, improving the water quality of rain runoff entering the water body, and preventing soil erosion and water body pollution. The rain runoff first passes through the arbor ecological fence and enters the first-level ecological filter; after the first-level ecological filter is collected and stored, it passes through the shrub ecological hedge and enters the second-level ecological filter; after the second-level ecological filter is collected and stored, it passes through the The herb ecological hedge enters the third-level ecological filter; after the third-level ecological filter is collected and stored, it passes through the aquatic plant functional area and finally enters the water body. When the rain runoff is small, the ecological filter collects and stores rainwater, which can ensure the water demand of the plants in the buffer zone. When the rain runoff is large, the ecological filter collects and stores rainwater, which can increase the infiltration rate of rainwater and prevent large Surface runoff directly enters water bodies, causing soil erosion and non-point source pollution.

Claims (10)

1. The steep slope buffer zone cascade treatment system for rain runoff collection and purification is characterized in that the steep slope buffer zone cascade treatment system for rain runoff collection and purification consists of arbor ecological hedge (A), first-level ecological filter (B), shrub ecological hedge ( C), the secondary ecological filter (D), the herbaceous ecological hedge (E), the tertiary ecological filter (F) and the aquatic plant functional area (G), which are dug step by step on the steep slope of the embankment from high to low There are first-level ecological filter (B), second-level ecological filter (D) and third-level ecological filter (F), and the arbor ecological hedge (A ), there are arbor plants (1) planted on the dam surface of the ecological hedgerow (A), and ecological hedgerows (C) are formed between the primary ecological filter (B) and the secondary ecological filter (D). Shrub plants (2) are planted on the dam surface of the shrub ecological hedge (C), and a herbaceous ecological hedge (E) is formed between the secondary ecological filter (D) and the tertiary ecological filter (F). Herbaceous plants (3) are planted on the dam surface of (E), and the dam body of the three-stage ecological filter (F) facing the water surface forms an aquatic plant functional area (G), and on the dam surface of the aquatic plant functional area (G) No. 1 aquatic plant (4) is planted on the top, No. 1 substrate (I) is filled in the first-level ecological filter (B) and the second-level ecological filter (D), and No. 2 substrate is filled in the third-level ecological filter (F). No. 2 substrate (Ⅱ), No. 2 aquatic plant (5) is planted in the primary ecological filter (B), No. 3 aquatic plant (6) is planted in the secondary ecological filter (D), and No. 3 aquatic plant (6) is planted in the tertiary ecological filter A No. 1 aquatic plant (4) is planted in the pool (F). 2. The steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 1, characterized in that the slope (α) of the steep slope of the embankment is 15°-30°. 3. The steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 1, wherein the arbor plant (1) planted on the dam face of the arbor ecological hedge (A) is a weeping willow, and the No. 1 aquatic plant The plant (4) is a reed. 4. the steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 1, is characterized in that the shrub plant (2) planted on the dam surface of the shrub ecological hedge (C) is spirea, red Swiss wood Plant one or a mixture of two. 5. the steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 1, is characterized in that No. two aquatic plants (5) planted in the first-level ecological filter (B) are the one in canna and cattail Or a mixture of the two. 6. the steep slope buffer zone cascade treatment system of rain runoff collection and purification according to claim 1, is characterized in that No. three aquatic plants (6) are planted in the secondary ecological filter tank (D) for calamus, water onion, iris One or more mixed planting. 7. The steep slope buffer zone cascade treatment system for collecting and purifying rain runoff according to claim 1 is characterized in that the herbaceous plants (3) planted on the dam surface of the herb ecological hedge (E) are phyllophyllum, quinces, One or more mixed plantings of bluegrass. 8. The steep slope buffer zone cascade treatment system for collecting and purifying rain runoff according to claim 1, characterized in that said matrix (I) is gravel with a particle size of 5-20 mm, and said matrix (II) is a particle size 30-80mm pebbles. 9. The steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 2, characterized in that the arbor ecological hedge (A), the shrub ecological hedge (C), the herbaceous ecological hedge (E) and the aquatic plant functional area ( In G), the height difference between adjacent dam crests is 25-50cm. 10. The steep slope buffer zone cascade treatment system for rain runoff collection and purification according to claim 1, characterized in that the dam crest of the aquatic plant functional area (G) is 20-40 cm higher than the water level line.