36results about How to "Reduce runoff velocity" patented technology

The invention discloses a sectored multi-step ecological buffer type revetment system. The revetment system is provided with at least four levels of steps, blocking walls are sequentially arranged on the outer sides of the steps, one plant planting zone is arranged in the blocking wall of each level, soil matrix is arranged in the upper layer of each plant planting zone, yellow sand, ceramsite, soft rock and zeolite are sequentially in the lower layer of the plant planting zone of each level, and emersed landscape plants and submergence-tolerant plants are arranged in the plant planting zone of each level; hydraulic drop platforms are sequentially arranged in the corresponding positions of spaced plant planting zones of the blocking walls; and one guide plate is arranged between each blocking wall and the corresponding hydraulic drop platform; the plant planting zone of the first level is connected with a farmland drainage canal and is sectored towards the downstream to form a hydraulic-drop type hierarchical structure in an open sectored shape, the sector radius is 5-8 m, and the central angle is 45 degrees-75 degrees; and the blocking wall of the last level is connected with a river channel. The sectored multi-step ecological buffer type revetment system not only has the efficacies of protecting river channel side slope, and realizing flood water drainage and water and soil conservation, but also has good purification and landscape effects.

The invention discloses a method for building an ecological littoral zone in a buffer area. The method comprises building of gabions, a low pond, multiple ponds and a retention canal. The method comprises the following specific steps: (1) a gabion area is built, wherein the gabions are built between a normal water level of a river and a level of a flood occurring every two years, and emergent aquatic plants are planted in gaps between the gabions; (2) the low pond is built, wherein a low area which is 20cm lower than the gabion area and 20cm lower than foundations of the multiple ponds is built between the level of the flood occurring every two years and the level of a flood occurring every twenty years; (3) a multi-pond system is built, wherein two rows of pond systems are built in the low pond area, substrate improvement is conducted, submerged plants are closely planted in the ponds, and the emergent aquatic plants are planted on the foundations and the circumferences of the ponds; (4) the retention canal is built, wherein the retention canal is built along the outside of the level of the flood occurring every twenty years. The method effectively solves the ecological problems that a surface source of a gentle slope area of the river is severely polluted, landscapes are poor, the biodiversity is reduced and water and soil loss occurs, and offers a feasible and efficient ecological restoration measure for recovery and reconstruction of a hydro-fluctuation belt.

The invention discloses a transverse-furrow and sequential-ridge mellow soil anti-corrosion farming method of a purple soil slope farmland and particularly relates to the field of a soil erosion management technique of the purple soil slope farmland. In the method disclosed by the invention, a transverse furrow is excavated along the contour line on the purple soil slope farmland at the slope length interval which is less than the rill erosion generation critical length of the modified slope surface; the cross section of the transverse furrow is in an arc shape; the formed transverse furrow divides the whole slope farmland plot into multiple small farming units in the transverse slope direction; the two ends of the transverse furrow are connected with the original drainage furrows at the two ends of the slope farmland plot; and the integral farming terrain conditions with alternate furrows and ridges are formed by adopting a sequential-slope ridging farming mode, i.e. alternately farming and ridging in the sequential slop direction and reverse slop direction. The method disclosed by the invention can reduce the water and soil loss and prevent and control the soil erosion of the slope farmland, is beneficial to the enhancement of the water content in the soil of the farmland plot in the descending direction of the transverse furrow, improves the drought resistance of crops, maintains the agricultural productivity of the slope farmland and realizes the sustainable utilization of slope farmland water and soil resources.

The invention relates to a rain collection purification system for preventing water and soil loss caused by rain wash in mountains. According to the terrain of a mountain, a river and a slope, two or more sets of rain collection purification systems are designed from the top of the slope to the bottom of the slope; a flume in one single set of rain collection purification system is arranged in the mountain and submerge-fast plants are planted; a rainwater collecting tank is arranged at the middle part of each flume; one row of willow branch bundle row piles are piled below an effluent weir of each flume; geotextile is paved inside the piles; epicormic willow branches are bundled into living branch bundles; gravel purification filtering media are filled in the living branch bundles; the living branch bundles are arranged between the effluent weir of each flume and the willow branch bundle row piles; the living branch bundles are totally covered with soil and ecological bricks are paved so as to form a side slope plain stage; a water outlet of each rainwater collecting tank is connected with gravity sprinkling irrigation equipment by a PVC (Poly Vinyl Chloride) pipe. The rain collection purification system has the advantages that water and soil loss and water flow non-point source pollution which are caused by rain wash in the mountains can be effectively prevented; the flow rate is reduced and intercepted; most of water enters the water collecting tanks; overflowing runoff can be deep intercepted by the interaction of the living branch bundles, the gravel layers and surface microorganisms and the purification effect is obvious.

The invention relates to a coastal ecological buffer zone structure having a compounding effect. The coastal ecological buffer zone structure comprises an herbaceous permeation zone, a shrub and herbaceous plant purifying zone, an arbor-herbaceous plant purifying zone and a reed purifying zone which are sequentially arranged in the runoff direction of farmland, wherein the herbaceous permeation zone comprises a bottom bearing layer, a gravel filling zone, a soil planting zone and a water reserving zone which are sequentially arranged from bottom to top, shrubs and herbaceous plants are plantedin the shrub and herbaceous plant purifying zone, arbors and herbaceous plants are planted in the arbor-herbaceous plant purifying zone, and hygrophytes and herbaceous plants are planted in the reedpurifying zone. Compared with common buffer zones, the coastal ecological buffer zone structure having the compounding effect can achieve remarkable permeation, detention storage and farmland rainwater runoff purification and has the advantages of rainfall flood regulation and storage, water purification, landscaping, biodiversity protection, water and soil conservation, low investment and operation cost and the like.

The invention discloses a method for controlling water and soil losses on the forest land slope surface. A plurality of interception units are adopted in the method. The method comprises the following steps that firstly, the interception units and the forest land slope surface are fixed, the interception units comprise a plurality of bamboo piles, the lower ends of the bamboo piles are obliquely cut to form sharp ends, the multiple bamboo piles are arranged side by side, the multiple bamboo piles are connected into a sheet shape through bamboo skin pieces with a certain thickness, one sheet-shaped interception unit is bent to form an arc with the two ends bent upwards, and the interception units are knocked into the forest land slope surface through the sharp ends to be fixed; secondly, the arc space formed by each interception unit contains soil; thirdly, other interception units are fixed through the modes of the first step and the second step, and the multiple interception units are arranged from top to bottom in a staggered mode. By means of a bamboo protective screen, the rainfall intensity and the rainfall kinetic energy can be buffered, the flow speed of runoff scoured through rainwater is effectively reduced, rainwater and silt are effectively intercepted, and the function of conserving water and coil is achieved.

The invention provides a multi-stage purification type grass planting ditch for green sponge and a construction method thereof. The grass planting channel is divided into an upper water flow area and a lower infiltration area through vegetation; the infiltration area is a vertically distributed first filter The water flow area is also provided with a baffle plate and a second filter area, and the baffle plate and the grass-planting ditch wall cooperate to divide the width direction of the grass-planting ditch into a plurality of water flow channels; the second filter area is arranged at the head and tail of the two water flow channels The connection point; the outlet of the flow channel is arranged in the outflow area, and an overflow wall is arranged between a water flow channel closest to the road surface and the outflow area to separate the two; the baffle includes a base and a partition, and the base It is buried in the infiltration area, and the baffle is exposed to the top of the water flow area; the baffle is hollow as a whole, and the surface of the base is provided with infiltration holes to communicate with the interior of the baffle; Below the flow area, and the water collecting pipe is buried at a height equal to or lower than the base of the baffle.

The invention discloses a geological disaster control system. The geological disaster control system comprises a slope crest and side slopes; the slope crest is arranged above the side slopes and provided with batteries, vertical rods, retaining dams and a plurality of water tanks; the vertical rods are provided with solar panels; the batteries are provided with controllers; a water outlet pipe isarranged on the front side of each water tank and provided with an electromagnetic control valve C; water via holes A are formed in the water outlet pipes; water via holes B are formed in the two sides of the water via holes A; the back of each water via hole B is provided with a fence net A; rubber baffles are arranged in the water via holes B; the side slopes are provided with stabilizing dams;water storage dams are arranged between the stabilizing dams; diversion pipes are arranged at the water via holes B and the front sides of the water storage dams and provided with electromagnetic control valves B; an irrigation pipe is arranged on the side of each diversion pipe and provided with an electromagnetic control valve B and a water outlet; planting devices are arranged below the wateroutlets; fence nets B are arranged on the two sides of the diversion pipes; stand columns are arranged below the stabilizing dams and provided with reinforcing rods; and protective nets are arranged between the stand columns. By means of the geological disaster control system, water of irrigated plants is prevented from being lost too fast, the run-off speed is decreased, and the water absorptioncapacity of soil and the anti-scouring capacity of the slope surface are improved.

The invention discloses a rainwater collection and reuse device for greening flats, which comprises a box body, the end face of the box body is connected with a water storage tank, and the box body is sequentially installed with a stone layer, an activated carbon layer, a gauze layer and a Ultrafiltration membrane, the lower end of the water storage box is connected with a water inlet pipe, a check valve is installed on the water inlet pipe, the lower end of the water inlet pipe is connected with a buffer box, and one end of the buffer box is connected with an outlet Water pipe, the end of the water outlet pipe is connected with a piston tube, the piston tube is connected with an L-shaped elbow, the L-shaped elbow runs through the box and is equipped with a booster valve, and the L-shaped elbow is far away from the box One end is equipped with a nozzle. The advantages are: the present invention has the functions of infiltration, filtration, storage, and drainage, reduces the runoff velocity of rainwater, effectively improves the infiltration of rainwater, improves the utilization rate of rainwater, coordinates the circulation of natural precipitation, surface water, and groundwater, and can also improve the environmental microclimate , reduce municipal drainage pressure, and save engineering construction costs.