CN102070248A - Configuration method of river bank forest belt beneficial to river ecological landscape protection and prayer flag suspension - Google Patents

Abstract

The invention relates to a configuration method of a river bank forest belt beneficial to river ecological landscape protection and prayer flag suspension, belonging to the field of a river regulation project. A region A is arranged within the 6-7 meters range far away from the river bank of a minor bed on a flood bed, reeds are planted inside the region A, and arbors are transplanted on the flood bed outside the reed region; a community facility area B is set; nursery-grown plants with breast diameters of 3.0-5.0cm are selected to be transplanted in a region C; and low herbs are planted below the arbors. The configured method has the beneficial effects that both Tibetan culture and river ecosystem protection are considered; a ecology theory and Tibetan culture inheritance requirements are brought into the design of the river ecological engineering while preventing the river bank from being corroded: a river bank forest belt based on the river ecological protection is designed firstly, and the prayer flags suspension is considered so as to meet the requirement of the Tibetan cultural inheritance; the river bank forest belt region is also in favor of the prayer flags suspension, and simultaneously, an arbor-shrub-herb river ecological system structure integrating culture inheritance, ecology shore protection and landscape enjoyment is created; and the long standing of Tibetan culture is ensured while promoting the forward succession of the river bank ecological system.

Description

Forest belt, the riverbank collocation method that is beneficial to the river ecological landscape reservation and hangs through long narrow flag

Technical field

The invention belongs to river improvement engineering field.

Background technology

(1) problem of river improvement engineering existence at present

Tibet is China slower area of development, and three stages of the development identical with other countries and regions have been experienced in the Tibet hydro project: the natural method stage of 1. controlling bank erosion with starting materials; 2. prevent and treat the mechanical means stage of flood with Steel Concrete; 3. beautify the imitative nature stage on concrete riverbank with trees.But there is the singularity of oneself Tibet region, that is: the whole people believe in Tibetan Buddhist.Therefore when river improvement, not only its engineering safety and ecological property be to consider, Tibetan language element and view and the hydrophilic factor also needed to consider.

The Tibet hydro project of having built is at present helped build by other rich provinces of China, still adopts with the river linearize with the administration way in Steel Concrete parcel river course.This administration way has not only intercepted connecting each other between the ecosystem component, simultaneously the mankind is difficult near the river, does not fully recognize the difference of two nationalitys of the Chinese to river understanding, that is: the relation of river and Tibetan languageization of hiding.Consequently not only river ecosystem is impaired, also make simultaneously people from Tibetan be difficult near the river and do not have the forest belt, riverbank can be extension through long narrow flag, lose and express religious carrier.

(2) domestic and international progress

The river improvement of Tibetan area starts from Lhasa River.633 years SontzenGampos move the capital to another place behind the Lhasa, for city, planning construction Lhasa better, guide the Lhasa river into southern side, and with the raising of former river course, this is the earliest an infrastructure construction on the Lhasa city-building history, also is Tibetan area river improvement the earliest.

Three generations Dalai Suo Nanjia in 1562 arranges and organizes Buddhist monks to carry building stones during annual Prayer meeting festival to build the Lhasa river levee, and protection is established in Potala Palace and Qoikang Monastery of 645 years and 647 years.The history records record, deluge once made the Lhasa become a vast expanse of water, and Qoikang Monastery Qian Shui can navigate.The record of administering Lhasa River protection city, Lhasa is all arranged various years thereafter, but all fundamentally do not solve the problem of Lhasa River flood.Since May 23 nineteen fifty-one, Party and government pay much attention to the Lhasa River training works, first Lhasa River are renovated comprehensively in 1964, rely on manpower and animal power to remove stone muck haulage and build floodwall in the shed repair of Lhasa River city.Start from the beginning of new century and really administer Lhasa River on a large scale.The section floodwall construction of going into full operation in city, Lhasa during " 15 (2001-2005) "; mainly solve the flood control safety problem; the engineering design standard was met by original less than and is brought up to 100 years one chances in 20 years one; fundamentally solved the flood threat, Potala Palace and the world, Qoikang Monastery material and culture legacy have obtained effective protection.During " 11th Five-Year (2006-2010) ", on the basis that solves the flood control problem, further development ﹠ construction Lhasa River two sides view and hydrophilic leisure facilities.The purpose that above-mentioned Lhasa River is administered mainly is to emphasize flood control function, protection city, Lhasa and Tibetan language landmark building Potala Palace and Qoikang Monastery.

The protection of the 5th Forum on Work in Tibet lay special stress on Tibet material of the central authorities that hold in January, 2010 and non-material cultural heritage; plan Tibet with setting up the important protection become the Chinese national characteristic culture, determined the development strategic objective during the Tibet " 12 (2011-2015) ".Through nearly 60 years development course, the Tibet river improvement has entered a brand-new era.The water conservancy that development is rich in the Tibetan language characteristic is the new strategy of China.And aspect river improvement, at present about not appearing in the newspapers as yet based on the achievement in research of Tibetan language protection and river ecological recovery technique.Present achievement all is the separately research and not intersecting separately of Tibetan languageization and river ecological reparation.

Based on above-mentioned analysis; river ecological recovery technique and the demonstration research carried out based on the Tibetan language protection are the strategic required of country's " 12 (2011-2015) " Tibetan area development perspectively; can carry out and implement protection Tibet material and the non-material cultural heritage and the important protection ground of setting up the Chinese national characteristic culture of the 5th Forum on Work in Tibet of central authorities; make Tibet become the meeting spirit of the important national security and the ecological protective screen, for the river improvement of Tibetan area provide can reference technological paradigm.

(3) this patent technical barrier that need solve

From the above, the problem that present river improvement engineering exists be the river course by concretize, the 26S Proteasome Structure and Function of river ecosystem is degenerated.Cut down in forest belt, original riverbank, and do not have the forest belt, riverbank can be extension through long narrow flag, lose and express religious carrier.Through long narrow flag special status is arranged in Tibet.In the view of believing in the people of Tibetan of Tibetan Buddhist, wave with the wind through long narrow flag, whenever wave, recite scripture exactly once, be ceaselessly to gods transmitter's hope, earnestly hope gods' blessing.And the compatriot of Tibetan, is difficult to realize if do not have trees as media vehicles to the worship in river.Present Tibet river improvement engineering causes the compatriot of Tibetan to locate being hung on end of the bridge, gabion and deadwood etc. through long narrow flag system, through long narrow flag close proximity to ground, the water surface, lost letting it flow property, promptly lost and express religious carrier, the faith demand is difficult to obtain satisfy fully.

When design is recovered in forest belt, general geographic riverbank, only consider ecological factor and landscape factors, in the minority area, especially national culture succession key element should be considered to add in the very tangible Tibet region of national characteristics.Therefore, the configuration in the forest belt, recovery riverbank of Tibet region design is compared with domestic other area, should increase this design element of Tibetan language succession.

According to the problem that exists in above analysis and the river improvement engineering, in conjunction with the characteristics of Tibet region, this patent provides a kind of can protect river ecological, can be beneficial to forest belt, the riverbank collocation method that hangs through long narrow flag again.

Summary of the invention

This patent provides a kind of forest belt, riverbank collocation method that is beneficial to the river ecological landscape reservation and hangs through long narrow flag; intercept the ecosystem to solve in the Tibet river improvement engineering; be unfavorable for again hanging through long narrow flag; it can only be lain in end of the bridge, gabion; be unfavorable for letting it flow, be difficult to fully satisfy the problem that Tibetan look up to demand.

The technical solution used in the present invention is to comprise the following steps:

(1) on high water river bed, be made as the A district in 6 ~ 7 meters apart from the riverbank of minor bed, in this zone:

(1) plant near the nearly water side on riverbank reed or calamus, 0 m of width 3. 0 m that plant ~ 4.;

(2) choose the diameter of a cross-section of a tree trunk 1.3 meters above the ground on the high water river bed in the outside in reed or calamus district and transplant the arbor of 6.0cm-8.0cm, nearly water side one row transplants willow, and far water side one row transplants willow;

(3) the space allocation plan of trees adopts isosceles right triangle, promptly is positioned on two miter angles with two adjacent trees of delegation, and an adjacent row's the nearest trees of distance two tree lines are positioned on an angle of 90 degrees;

(4) the tree spacing of adjacent two trees is 6.0m, and the line space of adjacent two row trees is 3.0m;

(5) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass;

(2) on high water river bed, establish the communal facility district in 3.5 meters in the outside in A district, be called for short the B district, in this zone:

The wide pavement of 1.5m is established in the centre, is used for laying bench, refuse container and display card communal facility in the zone of pavement both sides 1.0m;

(3) on the high water river bed, be made as the C district between the communal facility district outside and the dyke, in this zone:

(1) plant shrub or low pygmy tree one row of the nearly water side in adjacent B district adopts torch tree, and its outside high megaphanerophyte of planting is adopted willow, willow or English walnut, makes it be covered with the C district; Choose the nursery stock of the diameter of a cross-section of a tree trunk 1.3 meters above the ground 3.0-5.0cm and transplant,

(2) the space allocation plan of trees is selected equilateral triangle for use, promptly is positioned at two 60 with two adjacent trees of delegation and spends on the angle, and an adjacent row's the nearest trees of distance two tree lines are positioned at the 3rd 60 and spend on the angle;

(3) the tree spacing of adjacent two trees is 3.0m, and the line space of adjacent two row trees is 2.6m,

(4) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass.

The invention has the beneficial effects as follows: in the river ecological engineering design, take into account the protection of Tibetan languageization and river ecosystem, when preventing bank erosion, included the demand of Tibetan language succession in.When design is based on river ecological protection forest belt, riverbank, consider the faith demand that hangs, satisfies Tibetan through long narrow flag.The present invention can satisfy the requirement that Tibet is created as the important protection of Chinese national characteristic culture ground of planning that proposes in the 5th Forum on Work in Tibet of central authorities.The forest belt, riverbank through the long narrow flag suspension is convenient in laying, in order to succession Tibetan languageization, create Qiao-filling-careless river ecosystem structure that integrates cultural continuity, ecological revetment and view and view and admire simultaneously,, guaranteed that also Tibetan languageization is of long standing and well established promoting riparian ecosystem in the forward succession.

Description of drawings

Fig. 1 is forest belt, a riverbank of the present invention configure partition sectional view;

Fig. 2 is forest belt, a riverbank of the present invention configure partition orthographic plan;

Fig. 3 is trees plantation space, an A of the present invention district layout diagram;

Fig. 4 is A of the present invention district trees spacing, line-spacing synoptic diagram;

Fig. 5 is a B of the present invention district gallery configuration schematic diagram;

Fig. 6 is trees plantation space, a C of the present invention district layout diagram;

Fig. 7 is C of the present invention district trees spacing, line-spacing synoptic diagram.

Embodiment

The technical scheme that the present invention takes is:

(1) on high water river bed, be made as the A district in 6 ~ 7 meters apart from the riverbank of minor bed, in this zone:

(1) plant near the nearly water side on riverbank reed or calamus, 0 m of width 3. 0 m that plant ~ 4.;

(2) choose the diameter of a cross-section of a tree trunk 1.3 meters above the ground on the high water river bed in the outside in reed or calamus district and transplant the arbor of 6.0cm-8.0cm, nearly water side one row transplants willow, and far water side one row transplants willow;

(3) the space allocation plan of trees adopts isosceles right triangle, promptly is positioned on two miter angles with two adjacent trees of delegation, and an adjacent row's the nearest trees of distance two tree lines are positioned on an angle of 90 degrees;

(4) the tree spacing of adjacent two trees is 6.0m, and the line space of adjacent two row trees is 3.0m;

(5) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass;

(2) on high water river bed, establish the communal facility district in 3.5 meters in the outside in A district, be called for short the B district, in this zone:

The wide pavement of 1.5m is established in the centre, is used for laying bench, refuse container and display card communal facility in the zone of pavement both sides 1.0m;

(3) on the high water river bed, be made as the C district between the communal facility district outside and the dyke, in this zone:

(1) plant shrub or low pygmy tree one row of the nearly water side in adjacent B district adopts torch tree, and its outside high megaphanerophyte of planting is adopted willow, willow or English walnut, makes it be covered with the C district; Choose the nursery stock of the diameter of a cross-section of a tree trunk 1.3 meters above the ground 3.0-5.0cm and transplant,

(2) the space allocation plan of trees is selected equilateral triangle for use, promptly is positioned at two 60 with two adjacent trees of delegation and spends on the angle, and an adjacent row's the nearest trees of distance two tree lines are positioned at the 3rd 60 and spend on the angle;

(3) the tree spacing of adjacent two trees is 3.0m, and the line space of adjacent two row trees is 2.6m,

(4) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass.

Principle, the accompanying drawing chosen below in conjunction with allocation plan, seeds describe the present invention in detail

, allocation plan:

1.1 function division and location

(1) A district: be beneficial to through long narrow flag and hang the forest belt district.Purpose: mainly be that succession for Tibetan languageization provides carrier, take into account the defencive function of river ecological and view simultaneously.Consider that based on religion culture and national belief in line with being Tibetan language succession service, the forest belt, riverbank through the long narrow flag suspension is convenient in design.Suspension is the tradition that Tibetan forms over the past thousands of years, and will hangs on the waterside through long narrow flag through long narrow flag, is that Tibetan express the revering of water god, simultaneously to the refreshing transmitter's of water hope, and the blessing of earnestly hoping water god.

(2) B district: A and C's is communicated with the gallery district.Purpose: the distinguishing limit of nearly water riparian forest and far water riparian forest is the necessary key element of river communal facility, hangs for the ease of Tibetan and closely savours Tibetan languageization through long narrow flag, visitor; Seat, refuse container and display card have also been designed in this zone, make things convenient for Tibetan, visitor to view and admire the river when having a rest, and more simultaneously understanding Tibetan languageization and nature knowledge are formed a kind of attainment of protecting environment.

(3) C district: ecological protection forest belt district.Purpose: recover the naturality in river, the natural river that satisfies people from Tibetan is gods' a spiritual need.This district considers based on Ecology Action; Ecological View and landscape effect in conjunction with Tibetan; adopt Qiao-filling-careless structure of plant community, make up landscape ecological protection forest belt, riverbank, this district can filter rainwash, protection water quality, regulates miniclimate, stablizes bank slope, beautify valley flat.

The unified integral body of the common formation of A district, B district and C district three, formation integrates the river ecological gallery of flood control, ecology, hydrophilic, view and cultural continuity, see Fig. 1, Fig. 2, create safe and comfortable riverbank leisure environment, for Tibetan, visitor provide a rest area that integrates culture-view-ecology-amusement.

1.2 A district allocation plan

The A district is mainly through long narrow flag and hangs and design, and hangs through long narrow flag so allocation plan is main, takes into account ecology and landscape reservation simultaneously.

(1) the local area trees will be born the weight of the long narrow flag of hanging oneself, and just can hang through long narrow flag in order to satisfy planting then, transplant the seeds of 6.0-8.0cm so choose the diameter of a cross-section of a tree trunk 1.3 meters above the ground, take into account view, select willow and willow for use.

(2) the space allocation plan of trees is selected isosceles right triangle for use, see Fig. 3, promptly be positioned on two 45s with two adjacent trees of delegation, an adjacent row's the nearest trees of distance two tree lines are positioned on 90 ° of angles, this scheme is more attractive in appearance after long narrow flag hangs, and is guaranteeing also to have saved the space when trees are unfolded situation simultaneously.

(3) the tree spacing of adjacent two trees is 6.0m, and the line space in adjacent two row forest belts is 3.0m, sees Fig. 4, to reach the optimum distance that hangs through long narrow flag, avoids distance excessive, causes through long narrow flag to land, and distance is too small, and atmosphere draught-free can not let it flow through long narrow flag.

(4) be purpose to hang through long narrow flag, will adjacent as much as possible minor bed through long narrow flag, play the purpose that Tibetan express faith, take into account ecological property and view simultaneously, plant two capable trees so choose.

(5) aspect the plant structure configuration, the main employing: hygrophyte+arbor+draft.The suggestion hygrophyte is selected reed, calamus for use, is planted in nearly water side, to reach the purpose of stable banks, formation water route transitional zone; The outside arbor of directly planting is convenient to hang through the nearly pool of long narrow flag, and two row trees are chosen different seeds, when building landscape effect, reach the purpose of pre-preventing disease and pest, and based on this, nearly water side one row selects willow for use, and far water side one row selects willow for use; Arbor is the short draft of plantation down, in order to prevent the rain drop erosion face of land, adopts potentilla anseriana, annual bluegrass.

(6) in order to guarantee the trees healthy growth, prevent because of the excess moisture lack of air, cause the trees ' root anoxic to be rotted, so the tall wood of nearly water side one row is 3.0 ~ 4.0 meters apart from the minor bed shortest distance.

1.3 B district allocation plan

The distribution road that the B district designs for making things convenient for Tibetan, visitor.

This district's design is in A district and C interval; lay the wide pavement of 1.5m; pavement apart from border, A district, the distance on border, C district is 1.0m; see Fig. 5; this distance is used for laying communal facilitys such as seat, refuse container and display card; some flowers can be planted in this vacant lot, district, as lattice mulberry, mother chrysanthemum etc., increase landscape effect.

1.4 C district allocation plan

The C district designs for ecology and the view that recovers the river, has wherein forgiven Tibetan's Ecological View, and allocation plan is optimized for main purpose with dyke strengthening shore protection, view.

(1) these district trees play the stable banks, choose the nursery stock of the diameter of a cross-section of a tree trunk 1.3 meters above the ground 3.0-5.0cm, the nursery stock adaptability of this diameter of a cross-section of a tree trunk 1.3 meters above the ground scope is stronger, price is more cheap, willow, willow, English walnut are selected in suggestion for use, and the transplanting initial stage does not form the closing environment, and herbaceous plant grows fast, can replace arbor temporarily, play the effect of stable banks.

(2) the space allocation plan of trees is selected equilateral triangle for use, see Fig. 6, promptly be positioned on two 60 ° of angles with two adjacent trees of delegation, an adjacent row's the nearest trees of distance two tree lines are positioned on the 3rd 60 ° of angles, this space allocation plan is the scheme that protection forest is often chosen, the best effect of dyke strengthening shore protection can not only be reached, optimum space utilization situation can also be reached.

(3) the tree spacings of adjacent two trees are 3.0m, and the line spaces in adjacent two row forest belts are 2.6m, see Fig. 7, to reach the purpose that shore protection fixes the sand, avoid causing soil erosion because of dredging excessively, overstockedly cause ventilation not smooth, between kind, the intraspecific competition fierceness.

(4) aspect the plant structure configuration, the main employing: shrub/dungarunga+arbor+draft.Nearly water side is adjacent B district, and plant shrub or low pygmy tree are selected torch tree for use, to reach the ecoscape effect that purifies air and beautify the environment; Its outside high megaphanerophyte of planting, suggestion are selected willow, willow, English walnut, the outermost row willow of planting for use, make it be covered with the C district; Arbor is the short draft of plantation down, filters rainwash, prevents erosion, and selects potentilla anseriana, annual bluegrass for use.

, the principle chosen of plant

The A district hangs demand through long narrow flag in order to satisfy Tibetan, so at first consider the property easy to hang through long narrow flag, the seeds that should consider the racemosus wooden fork of choosing of seeds, the position of branch is moderate, prevents to land through long narrow flag because of branch is low excessively, and branch is too high, and Tibetan are not easy to suspension.When guaranteeing property easy to hang, also to consider easy activity and its landscape effect that is constituted of trees.

The B district mainly is in order to satisfy Tibetan, visitor demand easily, can to choose the strong flowers of some vitality, to reach landscape effect.

The C district mainly is in order to satisfy the ecological demand in river, considers at first that choosing of seeds it fixes the sand ability, and next considers cost, view and humanistic nature.

The functional requirement in comprehensive A district and C district now reduces following 6 points with the seeds selection principle:

(1) ecological property: choosing of seeds should be indigenous tree, is fit to the growth of forest belt, riverbank, and happiness is wet cold-resistant, and adaptability is strong, and easily survival can be checked winds and fixed drifting sand, and purifies water, and miniclimate is regulated in water conservation.

(2) view: based on the view consideration, the trees kind of choosing should be various, and color is different, selectable trees: spring and summer is bloomed and is presented multiple color autumn.

(3) humanistic nature: seeds choose the characteristics that will embody the Tibetan area and the Tibetan area people, certain spiritual connotation is arranged.

(4) security: single seeds cause large-scale disease and pest easily, and for preventing the generation of disease and pest, choosing of seeds should variation.

(5) property easy to hang: should be taken into account weight, length through long narrow flag through the suspension of long narrow flag, therefore should choose the racemosus wooden fork and the branch height is moderate choosing of seeds, limb can be born the seeds through long narrow flag weight.

(6) economy: choosing of seeds, in line with the principle of economy, with the input of minimum, obtain maximum benefit.

The nursery stock that suggestion is used

River, Tibetan poplar ( Populus szechuanicaSchneid. var. tibetica Schneid.), Salicaceae Populus, high megaphanerophyte.Be the main reproducting tree species of Lhasa, be celebrated with fast growing, strong, the easy breeding of adaptability.River, Tibetan poplar has the laudatory title of " Lhasa in the sky ", embodies the characteristics of Tibetan area.

Long stamen willow ( Salix longistaminaC. Wang et P. Y. Fu), Salicaceae Salix, dungarunga.Chang Zuowei protects the protection forest of native dyke strengthening, shore protection sand prevention, and branch is more, and is highly moderate, be suitable for hanging through long narrow flag, and Chang Zuowei riparian forest tape tree kind stable banks, germination early, evening fall leaves, and are signifying " the industrious Lhasa people ", have cultural connotation.

English walnut ( Juglans), be commonly called as walnut, the Juglandaceae white walnut, tall and big deciduous tree really 8 ~ September of phase, can be used to beautify the environment in 3 ~ April of florescence, also can provide fruit.

Torch tree ( Rhus typhinaNutt ),The Anacardiaceae sumach, machaka, cold-resistant, strong to soil suitability, well developed root system, sprout tillers is strong, and flourishing root system can play and conserve water and soil, the effect of water conservation, improvement ecology; Leaf is in great numbers, and surperficial villous can adsorb floating dust and objectionable impurities in the atmosphere in a large number, can purify air; Present 3 kinds of colors its every year: open spring and spend in vain, summer is the green fruit of greenery from head to foot, and the autumn and winter hang up red festoons really, can build landscape effect.

Reed ( Phragmites australis(Cav.) Trin. ex Steud.), the Gramineae reed belongs to, and perennial herb has the flourishing underground root stock of crawling, and can protect native dyke strengthening, opens white green or brown flower summer and autumn, can increase landscape effect, and reed can be gathered in autumn, in order to increase income.

Calamus ( Acorus calamusLinn), the Araeceae Acorus, aquatic herbaceous plant can be used for purifying water for many years.

Cosmos bipinnatus ( Cosmos bipinnatusCav), the composite family cosmos claims the lattice mulberry again, and the most indomitable, the prevailing a kind of wild flower of vitality on the plateau also is the city flower of Lhasa.

Mother chrysanthemum ( Dendranthema indicum(Linn.) Des Moul.), composite family, perennial herb, this kind have many mutation and cross-fertilize seed, and the type pattern changes many, and its flower, leaf can be used as medicine.

Potentilla anseriana ( Potentilla .anseriana), Rosaceae potentilla produces the big portion in Tibet, opens yellow flower summer, fritter root economically valuable.

Claims (1)

1. forest belt, a riverbank collocation method that is beneficial to the river ecological landscape reservation and hangs through long narrow flag is characterized in that comprising the following steps:

(1) on high water river bed, be made as the A district in 6 ~ 7 meters apart from the riverbank of minor bed, in this zone:

(1) plant near the nearly water side on riverbank reed or calamus, 0 m of width 3. 0 m that plant ~ 4.;

(2) choose the diameter of a cross-section of a tree trunk 1.3 meters above the ground on the high water river bed in the outside in reed or calamus district and transplant the arbor of 6.0cm-8.0cm, nearly water side one row transplants willow, and far water side one row transplants willow;

(3) the space allocation plan of trees adopts isosceles right triangle, promptly is positioned on two miter angles with two adjacent trees of delegation, and an adjacent row's the nearest trees of distance two tree lines are positioned on an angle of 90 degrees;

(4) the tree spacing of adjacent two trees is 6.0m, and the line space of adjacent two row trees is 3.0m;

(5) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass;

(2) on high water river bed, establish the communal facility district in 3.5 meters in the outside in A district, be called for short the B district, in this zone:

The wide pavement of 1.5m is established in the centre, is used for laying bench, refuse container and display card communal facility in the zone of pavement both sides 1.0m;

(3) on the high water river bed, be made as the C district between the communal facility district outside and the dyke, in this zone:

(1) plant shrub or low pygmy tree one row of the nearly water side in adjacent B district adopts torch tree, and its outside high megaphanerophyte of planting is adopted willow, willow or English walnut, makes it be covered with the C district; Choose the nursery stock of the diameter of a cross-section of a tree trunk 1.3 meters above the ground 3.0-5.0cm and transplant,

(2) the space allocation plan of trees is selected equilateral triangle for use, promptly is positioned at two 60 with two adjacent trees of delegation and spends on the angle, and an adjacent row's the nearest trees of distance two tree lines are positioned at the 3rd 60 and spend on the angle;

(3) the tree spacing of adjacent two trees is 3.0m, and the line space of adjacent two row trees is 2.6m,

(4) arbor is planted short draft down, adopts potentilla anseriana, lattice mulberry or annual bluegrass.

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