CN104452705A - Terrace type slope cropland multifunctional ecological ditch system for reducing nitrogen and phosphorus load - Google Patents
Terrace type slope cropland multifunctional ecological ditch system for reducing nitrogen and phosphorus load Download PDFInfo
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Abstract
The invention relates to a terrace type slope cropland multifunctional ecological ditch system for reducing nitrogen and phosphorus load. The system comprises an ecological water draining longitudinal trunk canal and ecological water draining transverse branch ditches, wherein ecological bag overflow weirs which are used for reducing flow speed and intercepting muddy sand are arranged in the ecological water draining longitudinal trunk canal at intervals of 10m; anti-corrosion vegetations are planted in the ditch of the ecological water draining longitudinal trunk canal; ecological bag permeable barriers which are used for filtering suspended impurities and absorbing nitrogen and phosphorous are arranged in each ecological water draining transverse branch ditch at intervals of 15-20m; vegetations capable of absorbing the nitrogen and the phosphorous easily are planted in a ditch body of each ecological water draining transverse branch ditch; and an overflow weir is arranged between the ecological water draining longitudinal trunk canal and each ecological water draining transverse branch ditch. The direction of water flow is changed, the kinetic energy of the water flow is reduced, functions of intercepting and absorbing the nitrogen, the phosphorous and the muddy sand and purifying, draining and storing water are fulfilled, so that nitrogen and phosphorus pollution of downstream water is reduced, nitrogen and phosphorus recycling is improved, the water and fertility retention capability of soil is improved, and income is increased.
Description
Technical field
The invention belongs to sloping upland improvement and liquid manure keeping system field, be specifically related to a kind of terrace-type sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load discharge.
Background technology
Sloping upland because of its special orographic condition and people be the impact of farming, under rainfall especially Rainfall Condition, the nutrients such as the nitrogen phosphorus in sloping upland and top layer mellow soil are easily taken away by runoff, cause downstream water nitrogen and phosphorus pollution and Sediment Siltation, cause the decline of soil depletion, soil fertility, crop production reduction simultaneously; And during not rainfall, because sloping upland water retention property is poor, easily cause again arid, crop failure, peasant's reduction of income.Thus; sloping upland is under the condition not implementing available protecting; a kind of soil erosion increases the weight of, the barrenr vicious circle of depositing with arid, crop production reduction, downstream Hu Ku and polluting of soil easily to make it be absorbed in; and then form the aggravation of downstream water nitrogen and phosphorus pollution, the situation that soil depletion is more outstanding with arid.According to statistics, sloping upland is the important component part of Chinese cultivated land, and its soil erosion amount accounts for 50% ~ 80% of total number of dropouts, is the main source of Hu Ku alluvial and the significant contribution person of water body nitrogen and phosphorus load.
In the prior art; minimizing sloping upland nitrogen and phosphorus loss, strengthening nitrogen phosphorus are recycled, realizes fertilizer conservation, water conservation and alleviate downstream water nitrogen and phosphorus pollution, reduce the multinomial targets such as Sediment Siltation and often can not take into account; Chinese patent literature CN 102986328 A reduces domatic pollutant by the technological means of using controlling agent and runs off and water and soil balance, but the chemicals such as the soil conditioner used, water-loss reducer and plant transpiration resistant agent exist potential impact to environment; Chinese patent literature CN 102177776 A designs domatic interval according to Rill Erosion generation critical plane method and builds terraced bank along isohypse accordingly and alleviate soil erosion, but can not realize recycling of water conservation and nitrogen phosphorus; Or employing Chinese patent literature CN 102239760 A utilizes crisscross traverse furrow, suitable hillside fields ditch and gutter etc. retain and row leads runoff, reduce runoff erosion, increase precipitation infiltration, but after rainfall, except the rainwater infiltration in early stage, all outer row of all the other runoffs, can not effectively retain nitrogen phosphorus, can not realize water conservation to increase lasting drought-resistant ability, and engineering quantity is comparatively large, land utilization ratio is little.
Summary of the invention
For prior art Problems existing, the invention provides a kind of terrace-type sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load, this system can reduce sloping upland nitrogen and phosphorus loss, strengthen the recycling of nitrogen phosphorus, water conservation, fertilizer conservation and alleviate downstream water nitrogen and phosphorus pollution, water body alluvial and engineering quantity of the present invention is little.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load, its objective is and realize like this: indulge trunk canal from top, slope, arable land to slope angle excavation Demonstration for Ecological Sanitation and excavate the horizontal Zhigou of Demonstration for Ecological Sanitation along isohypse direction, described Demonstration for Ecological Sanitation is indulged between trunk canal with the horizontal Zhigou of Demonstration for Ecological Sanitation and is connected by overflow weir.
Described Demonstration for Ecological Sanitation indulges the cross section size in trunk canal and corresponding domatic designing and arranging discharge, and (designing and arranging discharge is according to necessarily designing rainfall intensity, rainfall duration and catchment area are determined) relevant, Sectional Area is the ratio of designing and arranging discharge with flow velocity, for the runoff avoiding remittance Demonstration for Ecological Sanitation to indulge trunk canal blows back in farmland, ensure that Demonstration for Ecological Sanitation is indulged designing and arranging discharge domatic corresponding to trunk canal and drained smoothly from trunk canal, effective drainage section that Demonstration for Ecological Sanitation indulges trunk canal be count at the bottom of canal from the Demonstration for Ecological Sanitation overflow weir top of indulging between trunk canal and the horizontal Zhigou of Demonstration for Ecological Sanitation corresponding to cross sectional area, in canal, plantation drought resisting is resistance to lean, well developed root system, seed is less, the soil and water conservation effect vegetation well that plant is shorter, in canal, 10m rational height in interval is the adsorption of nitrogen phosphorus that Demonstration for Ecological Sanitation indulges trunk canal canal dark 1/4, the ecology bag overflow weir of Littoral Barrier, the selection of its ecology bag bag has nontoxic, the material of the feature such as anti-aging, the soil containing drought-enduring waterlogging-resistant vegetation seed is loaded in bag.When condition meets, the seed in bag can germinating growth.This design can increase domatic erosion-resisting characteristics and retain silt further, reduces the discharge of silt and nitrogen phosphorus.
The cross section size of the horizontal Zhigou of described Demonstration for Ecological Sanitation and design rainfall intensity and to retain early-stage rainwater volume relevant, and for ensureing effectively catching Initial Runoff amount in the horizontal Zhigou of Demonstration for Ecological Sanitation, its effective drainage section is that the overflow weir top of indulging between trunk canal and the horizontal Zhigou of Demonstration for Ecological Sanitation from Demonstration for Ecological Sanitation is counted to the cross sectional area corresponding to bottom of trench.Its interval is designed according to Rill Erosion generation critical plane method, in ditch, interval 15 ~ 20m arranges the ecology bag infiltration wall filtering suspended impurity, adsorption of nitrogen phosphorus, the height of ecology bag infiltration wall is 1/2 of ecological transverse drainage Zhigou ditch depth, its ecology bag bag selects the material with the feature such as nontoxic, anti-aging, load easy adsorption of nitrogen phosphorus and permeable sandstone in bag, in its ditch, plantation is easy to absorbed nitrogen phosphorus, the waterlogging resistance to lean vegetation of drought resisting.
The horizontal Zhigou of described Demonstration for Ecological Sanitation indulges the side in trunk canal or its both sides are arranged respectively according to orographic condition at Demonstration for Ecological Sanitation, and the interval of the horizontal Zhigou of Demonstration for Ecological Sanitation according to the design of Rill Erosion generation critical plane method, and arranges the gradient
i=0.003, slope aspect Demonstration for Ecological Sanitation indulges trunk canal.
Rainfall runoff is the major driving factor of nitrogen and phosphorus loss in sloping upland.Under the effect of rainfall kinetic energy and runoff corrosion, the nutriments such as the nitrogen phosphorus in sloping upland migrate to downstream water with runoff and silt, and therefore, runoff and silt are the main carriers carrying nitrogen phosphorus, and especially silt is easier to adsorption of nitrogen phosphorus.In addition, show according to sloping upland rainfall runoff simulation result of the test, under different gradient condition, the material such as nitrogen, phosphorus accumulative migration amount in first 30 minutes of rainfall runoff is greater than 70%, sticky content is all greater than 10min subsequently and remaining time period thereof in the runoff and sediment of front 10min, illustrate under different gradient condition, sloping upland has obvious heavy rain First Flush Effect.Therefore, strengthen the disposal to sloping upland runoff and silt, especially effective management of Initial Runoff and silt and disposal, can to reduction water body nitrogen and phosphorus load, strengthen nitrogen phosphorus and recycle and reduce Hu Ku alluvial and play an important role.The present invention follows material ecology circulation and sustainable use theory, use sloping upland heavy rain first flush rule and continuous-flow gauge rule, and according to the multi-functional drainage ecological canal of Rill Erosion generation critical plane method design-build, retained by the horizontal Zhigou of Demonstration for Ecological Sanitation and store Initial Runoff and utilize ecology bag overflow weir in irrigation canals and ditches, ecology bag permeates the multiple measures such as the overflow weir between wall and irrigation canals and ditches, change the direction of a stream of water, cut down water body kinetic energy, promote sedimentation, thus can effectively retain, adsorption of nitrogen phosphorus and silt, and utilize the vegetation of plantation in ditch to carry out further absorbed nitrogen phosphorus, alleviate downstream water Sediment Siltation and nitrogen and phosphorus pollution.
The silt that ecology bag overflow weir is tackled and the mud silt deposited in the horizontal Zhigou of Demonstration for Ecological Sanitation, it can 1 year be the cycle, after autumn Mo irrigation canals and ditches implants harvesting, the nutraceutical mud silts such as a large amount of for absorption nitrogen phosphorus are resigned from office and return home again as fertilizer, this object ensures that following time irrigation canals and ditches lead function to retaining of runoff with row, while realizing irrigation canals and ditches sustainable use, ensure the recycling of nitrogen phosphorus, strengthen soil fertility.
Key property of the present invention is that Demonstration for Ecological Sanitation is indulged between trunk canal with the horizontal Zhigou of Demonstration for Ecological Sanitation and is connected by overflow weir.First Initial Runoff comes together in the horizontal Zhigou of Demonstration for Ecological Sanitation, when the water level of the horizontal Zhigou of Demonstration for Ecological Sanitation indulges the overflow weir arranged between trunk canal and the horizontal Zhigou of Demonstration for Ecological Sanitation higher than Demonstration for Ecological Sanitation, runoff in the horizontal Zhigou of Demonstration for Ecological Sanitation will be compiled in Demonstration for Ecological Sanitation and indulge trunk canal, after rainfall stops, part rainwater is still stranded in the horizontal Zhigou of Demonstration for Ecological Sanitation and also slowly permeates supply field-crop water, effectively can increase the lasting drought-resistant ability of non-duration of raining sloping upland, improve soil moisture content and crop yield.
Advantage of the present invention:
1. effectively adsorb, retain nitrogen phosphorus and silt, cut down the discharge of nitrogen phosphorus.
2. strengthen nitrogen phosphorus to recycle, fertilizer conservation effect is given prominence to, and can reduce the erosion of top layer mellow soil, strengthens soil fertility, realizes effect of agricultural produce, increasing peasant income.
3. water conservation effect is obvious.
Accompanying drawing explanation
Fig. 1 is floor map of the present invention.
Fig. 2 is sectional drawing and the graph of a relation therebetween in the horizontal Zhigou of Demonstration for Ecological Sanitation and vertical trunk canal in Fig. 1.
In figure: 1. Demonstration for Ecological Sanitation indulges trunk canal, the 2. horizontal Zhigou of Demonstration for Ecological Sanitation, 3. ecology bag overflow weir, 4. overflow weir between trunk canal and Zhigou, 5. ecology bag filters wall, 6. erosion-resistant vegetation, 7. the vegetation of easy absorbed nitrogen phosphorus.
Detailed description of the invention
Below, the present invention will be further described by reference to the accompanying drawings.
A kind of sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load provided by the invention mainly comprises: the cross section size of indulging trunk canal (1) to the slope toe excavation Demonstration for Ecological Sanitation Demonstration for Ecological Sanitation indulged described in trunk canal (1) from top, slope, arable land is relevant with corresponding domatic designing and arranging discharge, and the runoff indulging trunk canal (1) for avoiding importing Demonstration for Ecological Sanitation blows back in farmland, ensure that Demonstration for Ecological Sanitation is indulged the corresponding domatic designing and arranging discharge in trunk canal (1) and drained smoothly from trunk canal, effective drainage section that Demonstration for Ecological Sanitation indulges trunk canal (1) be count at the bottom of the canal of (1) from the top of overflow weir (4) corresponding to cross sectional area.Resistance to lean, well developed root system, seed are less, plant the is shorter soil and water conservation effect vegetation (6) well of plantation drought resisting in canal, in canal, interval about 10m arranges and is about the adsorption of nitrogen phosphorus of the trunk canal degree of depth 1/4, the ecology bag overflow weir (3) of Littoral Barrier, its ecology bag bag selects the material with the feature such as nontoxic, anti-aging, the soil containing drought-enduring waterlogging-resistant vegetation seed is loaded in bag, when condition meets, the seed in bag can germinating growth.This design can increase domatic erosion-resisting characteristics and retain silt further, reduces the discharge of silt and nitrogen phosphorus.
Demonstration for Ecological Sanitation indulges the layout of trunk canal (1), can according to orographic condition, arranges one or its two ends are arranged respectively in one end of the horizontal Zhigou of Demonstration for Ecological Sanitation (2).
The horizontal Zhigou of Demonstration for Ecological Sanitation (2) excavates along isohypse direction, its cross section size and design rainfall intensity and to retain early-stage rainwater volume relevant, and for ensureing (2) interior effectively catching Initial Runoff amount, its effective drainage section is the cross sectional area counting to (2) corresponding to ditch top from the top of overflow weir (4).The interval of the horizontal Zhigou of Demonstration for Ecological Sanitation (2) is designed according to Rill Erosion generation critical plane method, its gradient
ibetween 0.002 ~ 0.003, slope aspect Demonstration for Ecological Sanitation indulges trunk canal (1), in ditch, interval 15 ~ 20m arranges ecology bag infiltration wall (5) filtering suspended impurity, adsorption of nitrogen phosphorus, it is highly about the ditch depth 1/2 of the horizontal Zhigou of Demonstration for Ecological Sanitation (2), its ecology bag bag selects the material with the feature such as nontoxic, anti-aging, load easy adsorption of nitrogen phosphorus and permeable sandstone in bag, Qi Gou slope and bottom of trench plantation are easy to absorbed nitrogen phosphorus, the waterlogging resistance to lean vegetation (7) of drought resisting.This design under different raininess condition, farthest can strengthen retaining and absorption of nitrogen phosphorus, reduces the discharge of nitrogen phosphorus, improves the water conservation condition in hillside fields, realize the sustainable utilization of rainwater.
Described Demonstration for Ecological Sanitation is indulged between trunk canal (1) with the horizontal Zhigou of Demonstration for Ecological Sanitation (2) and is connected by overflow weir (4).First domatic Initial Runoff comes together in the horizontal Zhigou of Demonstration for Ecological Sanitation (2), nitrogen phosphorus, silt and suspended material are wherein permeated wall (5) and vegetation (7) interception, absorption by the ecology bag arranged layer by layer and filter, when the water level of the horizontal Zhigou of Demonstration for Ecological Sanitation (2) indulges overflow weir (4) that arrange between trunk canal (1) and the horizontal Zhigou of Demonstration for Ecological Sanitation (2) higher than Demonstration for Ecological Sanitation, runoff in the horizontal Zhigou of Demonstration for Ecological Sanitation will cover overflow weir (4), be compiled in Demonstration for Ecological Sanitation and indulge trunk canal discharge; After rainfall stops, due to the existence of overflow weir (4), make the rainwater lower than overflow weir (4) will save in the horizontal Zhigou of Demonstration for Ecological Sanitation, ensure the lasting infiltration supply field-crop water of rainwater in following non-duration of raining with this, and then effectively can increase the lasting drought-resistant ability of non-duration of raining sloping upland.
The silt tackled for ecology bag overflow weir (3) and the mud silt deposited in the horizontal Zhigou of Demonstration for Ecological Sanitation (2) can 1 year be the cycle, after autumn Mo ditch implants harvesting, are are again resigned from office and return home by the nutraceutical silts such as a large amount of for absorption nitrogen phosphorus.
embodiment 1
The present embodiment selected areas is sloping upland trial zone, Han Ku upstream, and upper steep lower slow, the top gradient is 10 ~ 15 degree, and the bottom gradient is 5 ~ 7 degree, and slope aspect is towards east.Study area is divided into symmetrical plot, north and south two by the longitudinal arterial highway in this district, and length of grade is 60m, wide 100m, wherein, backlands block builds according to the method for designing of ecological canal, and southern plot adopts conventional tillage system reform to compare, and plant is the local medicinal material such as honeysuckle, Chinese herbaceous peony.
The rainfall intensity of study area
, runoff coefficient adopts 0.2,
t m the recurrence interval of-design rainfall, year; T---ground inlet time, gets 15min; The catchment area in two plot is 0.6hm
2, according to early-stage Study, Initial Runoff measures the run-off corresponding to rainfall duration 30min.It is as shown in table 1 that study area different reoccurrence rainfall intensity and trunk canal export run-off.
Table 1: study area different reoccurrence rainfall intensity and trunk canal export run-off
1. Demonstration for Ecological Sanitation indulges the structure in trunk canal
Indulge trunk canal near side, arable land from top, slope to the draining of slope toe excavation along arterial highway, study area, its effective cross section size is according to repetition period of rainfall in table 1 and trunk canal outlet run-off design construction.Calculated according to turf open channel flow velocity 1.6m/s by flow velocity in canal, 100 years recurrence intervals, corresponding run-off is 0.69m
3/ s, its effective transverse drainage cross-sectional area is then 0.43m
2, owing to occurring that the recurrence interval is that the probability of 100 years is less, so from economy, engineering quantity size and security consideration, its effective drainage section area gets 0.40m
2drainage requirement can be met.In addition, according to place size and flow, flow rates demand, the wide about 1.20m of setting section, available depth 0.50m adds distance 0.12 m between dam crest that overflow weir (Demonstration for Ecological Sanitation is indulged between trunk canal and the horizontal Zhigou of Demonstration for Ecological Sanitation) weir crest and Demonstration for Ecological Sanitation indulge trunk canal, and total canal is 0.62m deeply; The bermuda grass that in canal, resistance to lean, that well developed root system, seed are less, plant the is shorter soil and water conservation effect of plantation drought resisting is good, in canal, interval 10m arranges the ecology bag overflow weir of the Littoral Barrier being about 15cm height, its ecology bag bag selects material--the polypropylene with the feature such as nontoxic, anti-aging, loads the soil containing drought-enduring waterlogging-resistant bermuda grass seed in bag.
2. the structure of the horizontal Zhigou of Demonstration for Ecological Sanitation
According to the result of the test of Rill Erosion generation critical plane method and the orographic condition in test runoff district, 5 horizontal Zhigou of Demonstration for Ecological Sanitation along isohypse trend are built from top, slope to toe, spacing is 9m, 9m, 12m, 12m, 13m respectively, thus whole plot is divided into 5 Small burden, called after ditch one, ditch two, ditch three, ditch four, ditch five, the volume (unit: m required for Initial Runoff amount retained by different irrigation canals and ditches
3) as shown in table 2.
Table 2: the volume unit of Initial Runoff amount retained by each irrigation canals and ditches of different reoccurrence: (m
3)
As can be seen from Table 2, the Initial Runoff volume that different irrigation canals and ditches need be retained is different, but from economy, engineering quantity size and security consideration, determines that the volume size of the horizontal Zhigou of Demonstration for Ecological Sanitation is 25m
3, be 100m because ditch is long, accordingly, its Zhigou retaining plane of structure area is defined as 0.25m
2and according to the characteristic such as thickness of soil, terrain slope, determine ditch top width 0.9m, ditch bottom width 0.5m, effective ditch depth 0.38m adds overflow weir (Demonstration for Ecological Sanitation is indulged between trunk canal and the horizontal Zhigou of Demonstration for Ecological Sanitation) distance 0.12 m between weir crest and the ditch top of the horizontal Zhigou of Demonstration for Ecological Sanitation, and total ditch depth is 0.50m; In ditch, plantation is easy to absorbed nitrogen phosphorus, the waterlogging resistance to lean vegetation-grass-leaved sweetflag of drought resisting, in its ditch, interval 18m arranges the ecology bag infiltration wall filtering suspended impurity, adsorption of nitrogen phosphorus, the height of ecology bag infiltration wall is about 25cm, its ecology bag bag selects the material-polypropylene with the feature such as nontoxic, anti-aging, loads easy adsorption of nitrogen phosphorus and permeable sandstone in bag.
3. Demonstration for Ecological Sanitation is indulged between trunk canal with the horizontal Zhigou of Demonstration for Ecological Sanitation and is connected with overflow weir, and the distance from top Demonstration for Ecological Sanitation of overflow weir indulges trunk canal dam crest 10 ~ 12cm.
4. the soil of excavation ecological canal is positioned in respective Small burden to reduce for the purpose of disused arable land, while structure irrigation canals and ditches, eating condition can be weakened, reduce the soil erosion.
5. auxiliary contour planting pattern in each Small burden.
6. collected by the runoff in exit, plot, north and south two, Kuai Yunan plot, backlands is compared, and the reduction of nitrogen phosphorus discharge reaches 69.2% and 61.5%, subtracts husky benefit and reaches 84.3%, and due to the obvious preserve moisture and fertility benefit of backlands block, medicinal material volume increase about 11.6%.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not by the restriction of embodiment; other is any do not deviate from Spirit Essence of the present invention and principle under make change, modification, combination, substitute, simplify and all should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (10)
1. cut down the sloping upland multifunctional ecological sewerage of nitrogen and phosphorus load for one kind, comprise Demonstration for Ecological Sanitation and indulge trunk canal (1) and the horizontal Zhigou of Demonstration for Ecological Sanitation (2), it is characterized in that, Demonstration for Ecological Sanitation indulges trunk canal (1), the section in vertical trunk canal is semicircle, in canal, ecology bag overflow weir (3) is set every 10m, and the erosion-resistant vegetation of plantation (6) in canal; The horizontal Zhigou of Demonstration for Ecological Sanitation (2), the section of horizontal Zhigou is semicircle or trapezoidal, arrange ecology bag infiltration wall (5) every 15 ~ 20m in ditch and plant the vegetation (7) of easy absorbed nitrogen phosphorus in ditch, Demonstration for Ecological Sanitation is indulged trunk canal (1) and is connected by overflow weir (4) with the horizontal Zhigou of each Demonstration for Ecological Sanitation (2).
2. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, is characterized in that: the top of described overflow weir (4) indulges the dam crest in trunk canal (1) with Demonstration for Ecological Sanitation or the dam crest distance of the horizontal Zhigou of Demonstration for Ecological Sanitation (2) is 10 ~ 12cm.
3. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, it is characterized in that: the Sectional Area that described Demonstration for Ecological Sanitation indulges trunk canal (1) is the ratio of designing and arranging discharge with flow velocity, effective drainage section be indulge at the bottom of the canal of trunk canal (1) from top to the Demonstration for Ecological Sanitation of overflow weir (4) corresponding to cross sectional area.
4. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, is characterized in that: the height of described ecology bag overflow weir (3) be Demonstration for Ecological Sanitation indulge trunk canal (1) canal dark 1/4.
5. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, it is characterized in that: the Sectional Area of the horizontal Zhigou of described Demonstration for Ecological Sanitation (2) is the ratio of designing and arranging discharge with flow velocity, effective drainage section is the cross sectional area corresponding to dam crest from the top of overflow weir (4) to the horizontal Zhigou of Demonstration for Ecological Sanitation (2).
6. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, is characterized in that: the height of described ecology bag infiltration wall (5) is 1/2 of ecological transverse drainage Zhigou (2) ditch depth.
7. the sloping upland multifunctional ecological sewerage of reduction nitrogen and phosphorus load according to claim 1, it is characterized in that: the vegetation (6) that in the canal that described Demonstration for Ecological Sanitation indulges trunk canal (1), resistance to lean, that well developed root system, seed are less, plant the is shorter soil and water conservation effect of plantation drought resisting is good, in the ditch of the horizontal Zhigou of described Demonstration for Ecological Sanitation (2), plantation is easy to the waterlogging vegetation (7) of absorbed nitrogen phosphorus, drought resisting.
8. a kind of sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load according to claim 1, it is characterized in that: the horizontal Zhigou of described Demonstration for Ecological Sanitation (2) indulges the side in trunk canal (1) or its both sides are arranged respectively according to orographic condition at Demonstration for Ecological Sanitation, the interval of the horizontal Zhigou of Demonstration for Ecological Sanitation (2) according to the design of Rill Erosion generation critical plane method, and arranges the gradient
i=0.003, slope aspect Demonstration for Ecological Sanitation indulges trunk canal (1).
9. a kind of sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load according to claim 1, it is characterized in that: the soil containing drought-enduring waterlogging-resistant vegetation seed in the ecology bag bag of described ecology bag overflow weir (3), bag is nontoxic, anti-aging materials.
10. a kind of sloping upland multifunctional ecological sewerage cutting down nitrogen and phosphorus load according to claim 1, it is characterized in that: load easy adsorption of nitrogen phosphorus and permeable sandstone in the ecology bag bag of described ecology bag infiltration wall (5), bag is nontoxic, anti-aging materials.
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| CN106012948A (en) * | 2016-06-16 | 2016-10-12 | 中国农业科学院农业资源与农业区划研究所 | Method for preventing and controlling agricultural non-point source pollution of hilly and mountainous regions through nitrogen and phosphorus interception ditches |
| CN106134556A (en) * | 2016-08-30 | 2016-11-23 | 扬州大学 | Control row in runoff nitrogen phosphorus lattice field, rice field intercepts removal system and application process thereof with farmland diafiltration combination |
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| CN109673408A (en) * | 2019-02-26 | 2019-04-26 | 云南大学 | A kind of method of mountainous region or the solid soil control erosion of sloping upland plant networkization |
| CN109702003A (en) * | 2019-02-26 | 2019-05-03 | 云南大学 | A kind of method that the area Fu Lin slope surface water catchment area imitates kidney collection phosphorus and cuts down phosphorus again |
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| CN111165110A (en) * | 2020-01-10 | 2020-05-19 | 中国矿业大学 | Coal mining subsidence farmland quality improvement and transformation method based on ecological circular trench |
| CN112136610A (en) * | 2020-09-29 | 2020-12-29 | 西华师范大学 | Comprehensive utilization method for erosion gully of arid valley |
| CN113728879A (en) * | 2021-08-12 | 2021-12-03 | 中国科学院南京土壤研究所 | Compound interception area of nitrogen phosphorus non-point source pollution of slope arable land farmland |
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| CN109673408A (en) * | 2019-02-26 | 2019-04-26 | 云南大学 | A kind of method of mountainous region or the solid soil control erosion of sloping upland plant networkization |
| CN109702003A (en) * | 2019-02-26 | 2019-05-03 | 云南大学 | A kind of method that the area Fu Lin slope surface water catchment area imitates kidney collection phosphorus and cuts down phosphorus again |
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| CN110042810A (en) * | 2019-05-15 | 2019-07-23 | 云南大学 | A kind of sloping upland runoff pollution retains system |
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| CN112136610A (en) * | 2020-09-29 | 2020-12-29 | 西华师范大学 | Comprehensive utilization method for erosion gully of arid valley |
| CN113728879A (en) * | 2021-08-12 | 2021-12-03 | 中国科学院南京土壤研究所 | Compound interception area of nitrogen phosphorus non-point source pollution of slope arable land farmland |
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