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233 results about "Tidal water" patented technology

Sea water resistant ecological floating bed

The invention discloses a seawater endurable ecological floating floor, and relates to a plant growth carrier. The invention provides a seawater endurable ecological floating floor which is used for the plant restoration in an eutrophicated seawater environment, a floating floor fixing device and a plant restoration method in the eutrophicated seawater environment. The floating floor is provided with a floor body and cultured plants; the floor body is provided with two layers of plastic films; a foam bar is arranged between the two layers of plastic films; the foam bar is provided with culture holes; and fixing rings are arranged on the circumference of the two layers of plastic films. The fixing device is provided with fixing piles and fixing ropes; the fixing piles are fixed under water; and the fixing ropes are connected with the fixing piles. The restoration method comprises the following steps: preparing the floor body of the floating floor; driving the fixing piles under water and fixing one end of each fixing rope onto the fixing piles along the water flow direction; planting the salt endurable restoration plants into the culture holes through cuttage and transporting the plants to a restoration area; connecting the fixing rings and the fixing ropes, and adjusting the tightness of the fixing ropes so as to make the fixing ropes float up and down with the flux and reflux of the tide; and adjusting the salt endurable restoration plants according to the growth status and restoration effects of the salt endurable restoration plants.
Owner:XIAMEN UNIV +1

Flow guiding device of vertical axis tidal current generator

The invention discloses a diversion device of a vertical axis tidal generator, which relates to a diversion device of a vertical axis tidal water turbine which generates power with the energy of the rivers or ocean currents with quite low water flow speed. The device is technically characterized in that a main runner consists of the inlet of the diversion device, a contraction section, a middle runner, a divergent section and the outlet of the diversion device. The fluid is accelerated when flowing past the front sections of the contraction section and the middle runner; the flow speed from the tail end of the middle runner to the outlet of the diversion device is reduced, so that the pressure is recovered. In this way, the liquid flows the turbine with quite high flow speed, so as to improve the utilization rate of the water energy and recover stable flow status at the downstream of the turbine. The device is also provided with an auxiliary runner, so that the circular arc-shaped low-pressure position of the of the inflow surface at the inlet of the diversion device is communicated with the opening at the tail end of the middle runner; the structure can pump the fluid in the middle runner, expand the pressure difference in front of and behind the turbine, promote the fluid to be further accelerated and improve the flow pattern of the fluid.
Owner:TSINGHUA UNIV +1

Ground-type tidal Irrigation system

The invention discloses a ground-type tidal Irrigation system, which is used for irrigating potted plants with water or nutrient solution and comprises an upper water supply and drainage trench which is arranged at the upper part of a seedbed, a lower water supply and drainage pipeline which is arranged below the seedbed and is connected with the upper water supply and drainage trench, a water supply system and a water drainage system which are respectively connected with the lower water supply and drainage pipeline and a nutrient solution pond, and a comprehensive control system which are connected with the water supply system, the water drainage system and the nutrient solution pond. An ultraviolet ozone disinfection system and an electric floor heating system are additionally arranged in the system. The ground-type tidal Irrigation system can simulate tide rising and tide falling to irrigate the plants from roots, realizes the continuous cyclic use of the nutrient solution through the ultraviolet ozone disinfection system, reduces the spreading of soil-borne diseases and improves the production benefit of crops; good ground temperature can be provided for the growth and the irrigation of the crops in cold seasons and the situation that the crops grow slowly is avoided; and the comprehensive control system can realize the comprehensive control of the irrigation system, the disinfection system and the electric floor heating system to enable the application to be more convenient and faster.
Owner:BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI

Underwater anchorage system auxiliary wooden stool structure platform and construction method thereof

The invention relates to a stool platform assisting anchorage system in water and the construction method. The structure is that the upper end of support pile of steel pipe is fixed with the whole platform truss; anchor rope of anchorage system in water is fixed with the whole platform truss; the lower end of support pile of steel pipe is fixed with riverbed rock. The construction method is that the whole platform truss is assembled on assembling ship and anchorage system in water is set at the position of pier; the whole platform truss is transported to the pier position in floating and by using anchorage system in water the platform truss is located accurately; support piles of steel pipe are installed symmetrically; by using variety of water level the platform truss is fixed on the top of support pile to accomplish system transformation; by using anchor rod the support pile of steel pipe is fixed with the bedrock and by using prior anchorage system platform stability is increased. The invention is provided with simple structure, light weight, small water resistance surface and low cost. Simple and practical method is proposed for building basic construction platform under conditions of deep water, large flowing speed, strong tide, no covering layer for riverbed or less covering layer for riverbed.
Owner:THE 2ND ENG CO LTD MBEC

Double-reservoir self-adjusting tidal power generation method and system

The invention discloses a dual-reservoir self-adjusting tidal power generation method and the system thereof. The tidal power generation system is composed of an upper reservoir, a water inlet gate of the upper reservoir, a pressure pipeline, a water-turbine generator set, a lower reservoir and a water outlet gate of the lower reservoir. The water inlet gate of the upper reservoir and the water outlet gate of the lower reservoir adopt the jacking-shaft type hydraulic power self-regulation gate, so that the upper reservoir can fully introduce the tidal water, and the lower reservoir can fully discharge the tail water of a power station; furthermore, the inertia rise and fall of the tide are utilized, thus keeping the working head of the water-turbine generator set to the maximum extent, thus effectively improving transformation efficiency by utilizing the tidal energy to generate power, and solving the problems with a tidal power station, such as sediment accumulation, etc. Compared with the previous tidal power generation system, the novel tidal power generation system has the advantages of high energy conversion efficiency, long service life, simple structure, convenient operation, all-weather continuous generation, saved investment, research and promotion value, etc.
Owner:ZHEJIANG UNIV

Method for recovering intertidal zone salt marsh wetland

The invention discloses a method for recovering intertidal zone salt marsh wetland. The method includes the steps that a recovery area suitable for wetland recovery and wetland vegetation growth is selected in an intertidal zone; an ecological dam is constructed on the outer edge of the recovery area, and a culvert pipe for communicating the recovery area with the sea area is mounted; part of substrate is dug in the recovery area to form a shallow pond, and part of the substrate is lifted up to form a plant growth area suitable for growth of salt marsh plants; wetland plants are planted in the plant growth area, the culvert pipe is closed in the planting state and the seedling stage, a water pump is utilized to inject water in the shallow pond into wetland in the recovery area, water discharged out of the wetland flows and returns the shallow pond, the wetland and the shallow pond form internal water circulation, and the low water level is maintained; when wetland plants are mature, the culvert pipe is opened, sea tide flow is introduced, tidal water level change is formed, a proper flooding-drying alternating habitat is provided for the formed salt marsh vegetation, and the recovery area is made to gradually recover to the salt marsh wetland. According to the method, earthwork balance, water quantity regulation and other technical means are utilized, the degraded intertidal zone is recovered, and structural and functional stability of a wetland ecological system is improved.
Owner:SHANGHAI WATERWAY ENG DESIGN & CONSULTING

Method for planting suaeda salsa in coastal beach and application

The invention belongs to the technical field of plant planting and discloses a method for planting suaeda salsa in a coastal beach and an application. The method comprises the steps of 1, planting area selection, selecting an area suitable for planting from a mid-tide area and a high-tide area of an intertidal zone and building a wave blocking zone; 2, seeding, namely selecting temperature, seeding rate and seeding time; and 3, management after seeding, namely carrying out net covering, diversion and drainage for preventing flooding. The step 1 specifically comprises the content of selecting the area suitable for planting from the mid-tide area and the high-tide area of the intertidal zone; building the water blocking zone in a tidewater entering direction and building a dam in an offshoredirection in the planting area; or planting phragmites australis, high-stalk straws and phyllostachys pubescens in the tidewater entering direction in the planting area. According to the method, thesuaeda salsa is planted in a suitable environment on the beach, so that the growth area of the suaeda salsa is increased, the growth environment of the suaeda salsa on the beach is repaired and a support is provided for the stabilization of the biological diversity on the beach.
Owner:江苏盐城国家级珍禽自然保护区管理处

Cloud platform-based mangrove forest remote sensing rapid and accurate extraction method

The invention discloses a mangrove forest remote sensing rapid and accurate extraction method based on a cloud platform, and relates to the field of mangrove forest distribution diagram manufacturing, and the method comprises the steps: firstly, screening Sentinel-2 images with good quality through a Google EarthEngine cloud platform, and forming an image set; calculating a vegetation index NDVI of each image in the image set to obtain an NDVI image in space; forming a low-tide image formed by the maximum NDVI pixels; erasing an area without vegetation by using a mask function; utilizing an MFVI index to identify mangrove forest space distribution information; and erasing a non-mangrove forest region by using a mask function to obtain a spatial distribution diagram of the mangrove forest. According to the method, the difficulty of mangrove forest remote sensing interpretation caused by periodic tidal water submerging is overcome, and the problems that the submerged mangrove forest is missed to be painted and inland vegetation is wrongly divided into mangrove forests are solved. The mangrove forest interpretation method is fast and effective, improves the precision and credibility of mangrove forest interpretation, and has repeatability and robustness.
Owner:CHINA FORESTRY STAR BEIJING TECH INFORMATION CO LTD

Device and method for disposing river sewage through wind and tidal power generation and water storage drainage

The invention discloses a device and method for disposing river sewage through wind and tidal power generation and water storage drainage. The device comprises water storage gates and a high-position water storage platform. The high-position water storage platform is provided with a high-position water storage pool and a control room. The water storage gates comprise the first water storage gate, the second water storage gate, the third water storage gate, the fourth water storage gate and the fifth water storage gate. The fifth water storage gate is connected with a wind and tidal power generation device. The high-position water storage pool is connected with a water drawing pipe. The water drawing pipe is connected with a tidal water storage unit. The method for disposing river sewage through wind and tidal power generation and water storage drainage includes the procedure of high-position water storage platform and high-position water storage pool construction, water storage gate installation, wind and tidal power generation device and power generator set installation, tidal water storage unit installation, wind and tidal power generation device power generation and energy storage, tidal water storage unit water storage conducted for the high-position water storage pool, river upstream guidance of water in the high-position water storage platform, river floating object disposal, and river suspended object disposal.
Owner:ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER

Deposition promotion dyke and deposition promotion method for reclaiming land from sea by building dykes

InactiveCN103953003AAvoid the problem of being easily carried away by the tideEfficient use ofDamsClimate change adaptationTidal waterEngineering
The invention discloses a deposition promotion dyke and a deposition promotion method for reclaiming land from sea by building dykes. The deposition promotion dyke comprises a center dyke and expanding dykes, wherein the center dyke is arranged along a coastline; the center dyke and the coastline surround and form a center reservoir area; first one-way water gates are respectively arranged on two sides of the center dyke; the center reservoir area accommodates water through the first one-way water gates; one-way draining and generating equipment is arranged on the front side of the center dyke; water in the center reservoir area is drained to the outside through the one-way draining and generating equipment; the expanding dykes are arranged on two sides of the center dyke and are communicated with the center reservoir area through the first one-way water gates; the expanding dykes surround and form a deposition promotion area; second one-way water gates are arranged on the sides of the expanding dykes; the deposition promotion area accommodates water through the second one-way water gates. According to the setting, the deposition promotion dyke for reclaiming the land from the sea by building the dykes, which is provided by the invention, has the characteristics that the problem that silts are easily taken away by tide water can be solved and tidal energy can be effectively utilized for generating power.
Owner:SECOND INST OF OCEANOGRAPHY MNR

Mudflat wind electric field fan foundation structure

The invention relates to a fan foundation structure in the beach wind power field, mainly comprising a fan foundation upper bearing platform, a barrel-shaped foundation structure type formed by the surrounding wave walls and a drainage facility which is arranged on the foundation surface and drains the water from interior to the exterior. The top surface elevation of the fan foundation can be appropriately lifted up according to the elevation of beach surface; the wave walls which are arranged around the foundation are used for retaining the tidewater, so as to ensure that the fan tower frame steel structure is not soaked and corroded by the seawater. During the construction of the fan foundation, the foundation construction difficulty is reduced owing to the small elevation difference of the casting surface and the beach surface; after the existing beach surface is locally levelled and structurally disposed, a fan hoisting platform can be directly formed, thus reducing the engineering quantity of cubic metre of earth and stone of the fan hoisting platform, saving the engineering investment and shortening the construction period; on the fan hoisting aspect, as the hoisting platform is basically flush with the fan foundation surface, the fan foundation structure has the advantages of smaller hoisting height, convenient hoisting, and low hoisting expense, etc. compared with the existing beach fan foundation types.
Owner:SHANGHAI INVESTIGATION DESIGN & RES INST

Semi-floatation-condition work method for offshore self-elevating type work platform

The invention relates to a semi-floatation-condition work method for an offshore self-elevating type work platform. The semi-flotation condition work method includes the following steps that semi-floatation-condition work conditions are determined, a semi-floatation-condition work pile leg loading curve is mapped according to a tidal table of the location of a work project and a draught-buoyancy curve chart in a stability calculation report, and the draught upper limit Dh and the draught lower limit Dl under the semi-floatation-condition work lifting condition are determined; a semi-floatation-condition work ship body lifting plan is scheduled according to the weather change trend and the tidal water change trend and with the combination of the semi-floatation-condition work pile leg load curve, and the draught can be maintained between the draught upper limit and the draught lower limit; ship lifting work is conducted, and leveling and prepressing can be conducted at the center position between the draught upper limit and the draught lower limit; and lifting work is conducted, wherein the lifting and ship body lifting construction work sequence is arranged, a ship body is lifted so that the draught of the ship body can be maintained between the draught upper limit and the draught lower limit, and it is ensured that the pressure of a pile leg over the ground is in the allowed range. Platform environment loads of various time points of tidal changing are taken into consideration.
Owner:HUADIAN HEAVY IND CO LTD
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