1365 results about "Lake water" patented technology

The invention relates to the fields of applications of the internet of things technology, the wireless sensor network technology, the global positioning system (GPS) positioning technology and the GIS electronic map technology, and discloses an online lake water quality monitoring system based on internet of things. The online lake water quality monitoring system comprises a node monitoring device, a data video base station and a remote monitoring center; the node monitoring device is arranged in a lake to be monitored, and is used for monitoring the lake water quality and transmitting the monitoring data obtained from the monitoring to the data video base station through an ZigBee network; the data video data base is arranged in the lake to be monitored for transmitting the received monitoring data, and water quality information and video information which are collected by the data video base station are transmitted to the remote monitoring center through a mobile communicating network; the remote monitoring center comprises a GIS module, and is used for controlling navigation of the data video base station by remote means depending on water quality map information which is provided by the GIS module after receiving the monitoring data and all information, and for assisting to treat water quality of the lake to be monitored.

The invention relates to a multi-effect pollution removal purifying agent and a method for applying the same. The purifying agent is complexly formed by a strong oxidant, an effective adsorbent and an assistant medicament by a weight percentage of strong oxidant 10-80%, effective adsorbent 10-70% and assistant medicament 5-50%. The surface water treatment process of using multi-effect pollution removal purifying agent of the invention comparing with the common flocculants has the following advantages: effectively improving the turbidity removal ratio, increasing the flcos formation amount and alum blossom density for the difficult coagulated surface water, improving the deposition efficiency, oxidizing and removing the organic matters in the water, eliminating the chroma and odor caused by the pollution, increasing the effluent conventional indexes, obviously improving the indexes such as oxygen consumption and ammonia nitrogen, wherein the removal rate of oxygen consumption and ammonia nitrogen can reach 25-60%, the removal rate of small organic molecules, benzenes and phenols can reach more than 80%, playing an obvious roll for the algae inactivation of lake water and reservoir water which are serious eutrophic, improving the algae removal efficiency of the deposition and filtration technologies with an algae removal rate of 80-90%, improving the coagulation efficiency, reducing 20-30% of the common flocculant dosage, effectively adsorbing the codeposition heavy-metal ion. The adding equipment of the invention is easy and convenient to use with little investment and fast effect.

A solar thermoelectric power generation system comprises a solar thermoelectric power generation system body, a concentrated solar device, a metal photothermal conversion device, a water circulating cooling system and a solar heat absorption coating. Sunlight and concentrated sunlight can irradiate on the metal photothermal conversion device which is coated by the solar heat absorption coating, the solar heat absorption coating converts light energy into heat energy, and then the heat energy is transmitted to the metal photothermal conversion device, the metal photothermal conversion device transmits the heat energy to a hot end of a thermoelectric power generation device, a cold end of the thermoelectric power generation device is cooled by the seawater or river water or lake water or pond water or underground water circulating cooling system, and the solar thermoelectric power generation system body which is composed of the hot end of the thermoelectric power generation device and the cold end of the thermoelectric power generation device can convert heat into electrical energy.

The invention relates to the technical field of ecological restoration of water environment, and especially relates to a biological and ecological restoration system of eutrophic rivers and lakes. Ecological floating beds are laid along a bank, the water surface coverage rate of the floating beds is 15-20%, and each of the floating beds consists of a floating plate, planting baskets, a planting basket filler, floating bed plants, a nylon net, immobilized microorganism particles, a biological filler and artificial waterweeds. The planting baskets are placed in the planting basket holes of the floating plate, the planting basket filler is arranged in the planting baskets, the floating bed plants are planted in the planting basket filler, the nylon net suspends below the floating plate, the immobilized microorganism particles suspend between plant roots, the biological filler suspends below the nylon net, the artificial waterweeds are planted at the water bottom, and submerged plants are properly planted in a water area with two times in the transparency. The system has the advantages of simple and economic carrier, high strength, good durability, reliable planting, natural water ecological landscape, and engineering water quality improvement; and compared with systems in the prior art, the system focuses on the ecological restoration and construction of river and lake water, realizes the self purification, self regulation and self maintenance of pollutants in a certain concentration range, and is an effective way to improve the water quality without all-basin pollutant interception at the present stage.

The invention provides a remote sensing evaluation method of lake water reserves based on multispectral images. The remote sensing evaluation method includes: according to lake water body spectral response characteristics in different bands of multispectral remote sensing images, extracting water body indexes which reflect lake water surface distribution characteristics; according to the extracted water body indexes, obtaining lake water body boundaries, giving actually-measured lake water level information to the lake water body boundaries, and generating lake equal water level line data sets according to different periods of the lake water body boundaries; according to the lake equal water level line data sets, simulating lake underwater topography; and calculating the lake water reserves in different periods according to the simulated lake underwater topography and actually-measured water level data. According to the remote sensing evaluation method, the lake underwater topography is monitored through utilization of multispectral satellite remote sensing data, the utilized satellite remote sensing data substantially can be obtained for free, and the remote sensing data has the advantages of wide space coverage areas and rapid refreshing speed, so that compared with conventional field actual-measurement methods, the remote sensing evaluation method provided by the embodiment of the invention has the advantages of low monitoring cost, convenient refreshing, and possibility of wide-range popularization and application.

The invention relates to an automatic river and lake water sample control acquisition system based on a multi-rotor-wing unmanned aerial vehicle. The automatic river and lake water sample control acquisition system comprises a remote controller, the multi-rotor-wing unmanned aerial vehicle, a lifting device and a water sample acquisition device, wherein the lifting device is arranged on the multi-rotor-wing unmanned aerial vehicle, the water sample acquisition device is connected with the lifting device, a wireless receiver, a programmable logic controller, a navigation locating system, a camera and a wireless transmitter are arranged on the multi-rotor-wing unmanned aerial vehicle, the navigation locating system is connected with the wireless receiver, the wireless receiver and the wireless transmitter are both in wireless communication with the remote controller, and the wireless receiver, the wireless transmitter, the camera, the lifting device and the water sample acquisition device are all connected with the programmable logic controller. The automatic control acquisition system enters a sampling region in a flying manner, is flexible, and can prevent the problem that existing sampling equipment cannot enter the sampling region due to frondent aquatic plants in riverways, relatively low water level, complex sampling environments and the like, so that the sampling in a high-efficiency manner can be accurately performed.

A water quality purification system for a hybrid artificial wetland includes a first aerobic artificial wetland, an anaerobic artificial wetland, and a second aerobic artificial wetland. Here, the first aerobic artificial wetland induces a vertical flow of water, which is to be purified, and allows pollutants to be removed. The anaerobic artificial wetland induces a horizontal flow of treated water which is introduced from the first aerobic artificial wetland, and allows pollutants to be further removed. Additionally, the second aerobic artificial wetland induces a vertical flow of treated water which is introduced from the anaerobic artificial wetland, and allows air to be supplied inwardly such that the amount of dissolved oxygen of the introduced treated water increases.

The invention discloses a technology for direct in-situ treatment and ecological restoration of polluted water body, belonging to the field of environment protection. The technology is a systems engineering which synthesizes three contents: 1, a water flow stirring elevator for generating high-flow water flow is installed, fixed and used in water body, so that the water body which is free of flowability or very low in flowability is changed into running water from dead water, and the biochemical reaction environment of water body can be improved; 2, biological membrane fillers which are provided or enriched with a mass of microbial community are arranged in river and lake water body which is preferably oxygenated, so that the organic pollutants or the other microorganism-degradable pollutants in water can be effectively removed in a degradable way; and 3, aerobiont contact oxidation reaction in polluted and nutrition-enriched river and lake water body is carried out, the aquatic plants are planted and the aquatic animals are bred, and the pollutants in the river and lake water body are biologically degraded and purified, so that the in-situ treatment and purification of the polluted river and lake water body can be realized.

The invention discloses a three-dimensional ecological restoration method for a supereutrophic lake water body. The method comprises the following steps of: inserting a plurality of fixed piles into a hard layer at the bottom of a lake, transversely connecting the tops and middle parts of the fixed piles with steel cables to form an enclosure structure, connecting water-proof canvas serving as enclosure cloth with the fixed piles, and fixing the bottom end of the enclosure cloth and a gabion at the bottom of the lake after sewing to constitute an enclosure; transforming a substrate in the enclosure; partitioning the water surface into multiple layers according to water plants needing to be planted; transplanting the water plants; establishing an ecological floating island; performing biological alga control; and running an ecological enclosure system, maintaining and managing. By adopting the method, the water quality can be improved remarkably, the water transparency is enhanced remarkably, the nutrient salt content is lowered remarkably, and remarkable ecological benefit and landscape effect are achieved.

The invention provides a water plant imitating biological carrier, a polyurethane composite material and a water quality purifying technology. The water plant imitating biological carrier comprises a multiple structure formed from a polyurethane layer, fiber web layers and fiber yarn layers, wherein the polyurethane layer is located in the inner layer; the two fiber web layers are respectively covered on the upper surface and the lower surface of the polyurethane layer; and the two fiber yarn layers are respectively covered on the external surface of the two fiber web layers. The polyurethane composite material contains 2-6 wt% of activated carbon fiber and 94-98 wt% of polyurethane. In the water quality purifying technology, submersible type photo-electro-magnetic river lake water quality purifying device is adopted with the water plant imitating type biological carrier to operate in the same area for water quality purification. When used for purifying bodies of surface water, the invention has the advantages of no land occupation by equipment, low investment cost and operating cost, high the removal efficiency on organic pollutants, and good application prospect, and the purification efficiency is more than 2 times greater than that of whole ecological restoration.

The invention discloses an integrated method of lake water environment management. The integrated method of the lake water environment management comprises the steps of making first-phase preparations for lake water environment integrated management, analyzing a landform, designing the type of a side slope, determining the self-cleaning capacity of a lake, controlling pollution sources around the lake, conducting a silt-removing treatment on a water body, managing the side slope, conducting ecological restoration on the lake, and conducting monitoring and emergency treatment on the lake. The integrated method of the lake water environment management is used for enabling a lake water environment biologic chain to be effectively restored and consolidated and enabling the lake side slope to be stable.

The invention provides an MODIS satellite high-precision monitoring method for chlorophyll-a in a eutrophic lake water body. The method comprises the following steps: screening a chlorophyll-a evaluation index (BNDBI) which is sensitive to the concentration change of chlorophyll-a and not affected by highly suspended matters, thin cloud and solar flares; acquiring the quantitative relationship between BNDBI and the concentration of chlorophyll-a on the basis of biological optical model simulation; acquiring a chlorophyll-a inversion algorithm based on ground measured spectrum (Rrs) and BNDBI by referring to water body spectral information and corresponding water body chlorophyll-a concentration of 2013-2014 lake field monitoring; acquiring the quantitative relationship between the ground monitoring and remote sensing reflectance ratio (Rrs) and Rrc after simulated Rayleigh scattering correction by simulating different aerosol types and thicknesses and different solar elevation angles, satellite observation angles and azimuth angles; and extending the chlorophyll-a inversion algorithm based on ground measured spectrum data to satellite image data after Rayleigh scattering correction. Based on the method, inter-annual and inter-monthly change rules and spatial distribution of chlorophyll-a in a eutrophic lake can be acquired accurately.

The invention discloses a self-lifting water quality purification device applicable to still water lakes. The device comprises a floating island basal body, an air pump, an ecological purification box, floating troughs, an air delivery pipe and an aeration device, wherein the floating island basal body floats on the water surface and aquatic plants are planted on the floating island basal body; the ecological purification box is in a water permeable structure, and substances used for microbial degradation and physical filtration and adsorption are arranged in the ecological purification box; the ecological purification box slides up and down along the air delivery pipe; and the aeration device is arranged below limit switches, is connected with the lower end of the air delivery pipe and is used for delivering oxygen to lake water and the floating troughs. The device has the beneficial effects that integration of plant absorption, microbial degradation, physical filtration and adsorption and oxygenic aeration of the lake water is achieved via the aquatic plants, the ecological purification box and the aeration device; the invention aims to solve the problem that common floating beds have poor still water bottom layer purification efficiency; and three-dimensional purification of the still water is achieved by the self-lifting purification device to gain better water quality purification effects.

The invention discloses a river and lake water quality monitoring method based on high-resolution satellite images. The river and lake water quality monitoring method comprises satellite image radiometric calibration, atmospheric correction, RPC orthographic correction, image splicing, automatic water body extraction, water quality quantitative inversion modeling, water quality quantitative inversion model precision verification and water quality quantitative inversion model application. The invention relates to the technical field of inland water environment remote sensing science, in particular to a river and lake water quality monitoring method based on a high-resolution satellite image, which has the advantages of wide monitoring range, high speed, low cost and convenience in long-termdynamic monitoring by utilizing a remote sensing technology. A multiple linear regression model between different water quality parameter concentrations and image waveband reflectivity is establishedby combining sampling data of a water quality monitoring station and representation of various substances in a water body on a remote sensing image, and a relative error and an absolute error of themodel are calculated according to an inversion result, so as to promote the model, and water quality evaluation of the whole river and even a water area with a larger range is achieved.

The invention discloses a method for treating black and stink river and lake water body in a city and especially relates to a proportion of a sediment repairing agent. The sediment repairing agent is a mixture of zeolite powder, active carbon, oxygenation agent, flocculating agent and adhesive in a mass ratio of 10-50:5-10:1-20:1-10:1-5. The sediment repairing agent of the invention can effectively alleviate or even eliminate a phenomenon of black and stink water body, prevent a phenomenon of black mud turning over in water body and increase transparency of the water body.

The invention discloses an ecological restoration method for a lakeside wetland. In the method, hygrophilous woody plants are planted in a lakeside zone to construct wetland plant communities. The hygrophilous woody plants comprise hygrophilous arbor and hygrophilous shrub, wherein the hygrophilous arbor comprises willows, metasequoia, ascendens mucronatum, taxodium ascendens brongn and bamboo; the hygrophilous shrub comprises iteaceae and S.integra thrnb; and the plants are planted in the way of shoot cottage or soil ball transplant. The hygrophilous woody plants are perennial plants, have a low growth rate, low biomass, low growth amount and low plant disposal pressure and do not need felling and refloating every year, so that the defects of frequently harvesting and refloating herbal emergent aquatic plant communities every year are overcome, the maintenance and management cost of lake wetland plant communities are reduced, the lakeside depositing rate is lowered, and the secondary pollution hidden danger to lake water bodies is relieved. Compared with the prior art, the method has the characteristics of convenient operation, maintenance and management, low maintenance cost, high ecological benefit, easy popularization and application and the like and can be used for ecological restoration engineering of lake and lakeside bottomlands, swamp marshes and shallow water zones.

The invention provides a numerical simulation and visual simulation system for improving the water quality of dispatching engineering. The system adopts a service-oriented system and a continuous integration method and integrates an on-line lake water quality dynamic monitoring module, a lake group hydrological cycle module, a lake distributed fluid field computation module, a lake water quality water environment analysis module and a digital lake visual simulation platform. The system can simulate various complicated terrains, complicated climates and lake fluid fields under complicated flow regimes and has the advantage of high numerical simulation precision.

The invention relates to a method for estimating suspended matter concentration in turbid lake water based on a VIIRS sensor. The method comprises: based on lake field measured spectrum and substance concentration data, analyzing optical properties of water body and water quality dominant factors; screening wave bands which are sensitive to suspended matter concentration variation in the turbid lake water, using curve fitting to determine an optimal model of suspended matter concentration and ground measured spectrum (Rrs); using Rrc data which is removed with water vapor and ozone absorption and corrected by Rayleigh scattering to establish a suspended matter concentration quantitative model which is suitable to be used for the VIIRS; and finally, using the established model on a VIIRS image, to accurately obtain interannual and inter-monthly variation rules and spatial distribution of the suspended matter concentration of the turbid lake water. Using the method can realize long-term high-precision monitoring of suspended matter concentration of a lake, and the method is helpful to scientifically evaluate interannual suspended matter concentration variation and development trends thereof, and effectively evaluate ecological environment changes of lake water.

The invention discloses an urban river and lake water quantity and quality monitoring and managing system based on the internet of things. The urban river and lake water quantity and quality monitoring and managing system based on the internet of things comprises a management center server, a wireless communication network and water quantity and quality monitoring terminals arranged in rivers and lakes. A plurality of adjacent water quantity and quality monitoring terminals compose a ZigBee subnet; a plurality of ZigBee subnets transmit real-time water quantity and quality information to the management center server through the wireless communication network; the wireless communication network displays, analyzes and manages the water quantity and quality information of the urban rivers and lakes uniformly. By the aid of the ZigBee technology with low power consumption and low cost, water quantity and quality of urban rivers and lakes are monitored and managed, relative information of water quantity and quality of the urban rivers and lakes can be monitored in real time, data can be sent, analyzed and calculated in time, integral monitoring and information integration to water quantity and quality of urban rivers and lakes are carried out by the waterworks department through the urban river and lake water quantity and quality monitoring and managing system, and accordingly, the urban river and lake water quantity and quality monitoring and managing system has great significance in guaranteeing safety of urban water resource utilization.

The invention relates to the technical field of sewage treatment and particularly relates to an industrial wastewater treating agent. The industrial wastewater treating agent comprises the following components in parts by mass: 0.8-3 parts of polyacrylamide, 25-35 parts of aluminium polychlorid, 25-55 parts of alums, 3-8 parts of iron trichloride, 0.8-3.4 parts of polymeric ferric sulfate, 1.2-2.5 parts of a coagulant aid, 2-10 parts of plant fiber, 10-30 parts of coal ash, 0.8-2.5 parts of sodium silicate, 2.5-5 parts of sodium sulfite, 0.5-3.5 parts of sodium hypochlorite, 5-10 parts of hydrogen peroxide, 8-15 parts of a sodium carbonate-sodium bicarbonate buffer system and 10-20 parts of sodium-based bentonite. The treating agent has the beneficial effects of wide treated pollutant range, good effect, wide production raw material source, environmental friendliness, no toxicity, good discharged water quality, short process flow, and high process operating safety. The treating agent disclosed by the invention can treat various kinds of wastewater such as chemical wastewater produced in oil fields, mining, steel, electroplating wastewater, dyes, pesticides, wine-making and chemical engineering, and sanitary sewage, papermaking wastewater, river and lake water, rubbish seeping water, leather-making wastewater, and the like; and the treating agent is good in treatment effect.

The invention provides a combined artificial marsh treating system for eutrophic river and lake water bodies and early rain water, comprising double-channel water inlet unit, plant-gravel filtering and settling unit and horizontal undercurrent strengthening treating unit, connected in series. And the eutrophic river and lake water bodies and early rain water are collected through the double-channel water inlet unit into the plant-gravel filtering and settling unit, then flow through the horizontal undercurrent strengthening treating unit and finally are discharged, thus able to prevent plants withering by no early rain water, effectively removing suspened matters, low-cost, having good anti- seepage effect, and durable. And reeds, bulrushes, fleur and other water plants are planted in the treating units, having high pollutant removing efficiency and very good landscape effect.

The invention discloses an MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tube material, a method for preparing the same and application of the MOF-based magnetic nitrogen-doped carbon nano-tube material. The MOF-based magnetic nitrogen-doped carbon nano-tube material can be used as an adsorption material. MOF are calcined at the high temperatures to obtain the MOF-basedmagnetic nitrogen-doped carbon nano-tube material. Carbon nano-tubes with large quantities of free N elements are generated on the surfaces of the MOF-based magnetic nitrogen-doped carbon nano-tube material while the appearance of the MOF is reserved. The MOF-based magnetic nitrogen-doped carbon nano-tube material, the method and the application have the advantages that the MOF are used as templates for the MOF-based magnetic nitrogen-doped carbon nano-tube material which is a magnetic carbon material prepared by the aid of the method, and are directly calcined at the high temperatures to obtain the magnetic carbon material; the carbon material is high in environmental stability as compared with MOF adsorption materials, and pi-pi conjugation can be formed by the carbon material and targetobjects by the aid of strong conjugation surfaces of the carbon nano-tubes; the MOF-based magnetic nitrogen-doped carbon nano-tube material is extremely high in magnetism as compared with commercialcarbon nano-tubes, and target object detection procedures can be simplified by the aid of MSPE (magnetic solid-phase extraction) methods; processes for preparing the MOF-based magnetic nitrogen-dopedcarbon nano-tube material are simple, and the MOF-based magnetic nitrogen-doped carbon nano-tube material which is a magnetic nitrogen-doped carbon nano-material is high in magnetism and super-high inenvironmental stability, has large specific surface areas, can be specifically bound with the target objects and has an excellent application prospect in the field of detection on the content of microcystin in lake water and the like.

The invention discloses a lake water quality evaluation prediction system and method based on a factor weighting model. The method comprises the following steps: through different lake area pollution thermal graph color conditions, knowing each lake pollution contrast; through obtaining lake basin weather indexes, feeding time vector weather temperature information and each weather index to a user; displaying an accomplishment of an improved factor weighting model; and through combination with a correlation analysis algorithm, emitting an alarm to the user for each current standard-exceeding water quality index and prediction standard-exceeding indexes. According to the invention, the factor weighting evaluation model capable of more accurately evaluating water quality is established. Through numerous data tests of the model, it is proved that the algorithm operation efficiency and the water quality evaluation accuracy are greatly improved. A factor weight based evaluation model is established, a future lake water quality and environment development trend is reasonably predicted and analyzed, most visual water quality change and lake area differences can be given to the user, and water supply environment management advice is provided for sustainable development of a nine-like basin.

The invention discloses a lake water body blue-green algae abundance estimation method based on remote sensing. The method comprises the following steps: carrying out high-spectrum remote sensing measurement on a lake water body by utilizing the concentration ratio of phycocyanin and chlorophyll to represent the blue-green algae abundance, selecting the ratio of remote sensing reflective rates of the two specific wave lengths and a function thereof as characteristics of blue-green algae, establishing an estimation model of the lake water body blue-green algae abundance, and estimating the lake water body blue-green algae abundance based on remote sensing. The method provided by the invention adopts a surface feature spectrograph or an onboard high-spectrum imager to carry out high-spectrum remote sensing on the lake water body, and the remote sensing reflective rate required for estimation can be obtained through performing radiation correction and atmospheric correction on aviation satellite high-spectrum data. The method provided by the invention has the advantages that the accuracy is high, the model is simple, the remote sensing reflective rates of the two wave lengths are selected, not only can the estimation on the water body blue-green algae abundance measured by the surface feature spectrograph be realized, but also the estimation on the blue-green algae abundance by virtue of aviation high-spectrum remote-sensing images is realized.

The invention discloses a riverside ecological multi-dimensional circulating type wet land slow-flow infiltration pollutant intercepting system which mainly comprises a primary vegetation buffer zone, a hydrophilic platform, an adjusting pond, an ecological retention system and a secondary vegetation buffer zone. The primary vegetation buffer zone is arranged on one river-ward side along the riverside road surface, the gradient is consistent to the gradient of an original bank slope, the downward width along the bank slope is 1.0-1.2m, and the length is 800-1000m. The ecological retention system is provided with a planting soil layer, a filler layer, a reverse osmosis layer and a gravel layer which are sequentially arranged from top to bottom. The riverside ecological multi-dimensional circulating type wet land slow-flow infiltration pollutant intercepting system reduces pollution load caused by surface source runoff flowing into a river channel during the rainy season, achieves the synergic purpose of water channel water quality circulating purification and wet land conservation during the non-rainy season, has good landscape effect and has the reference and guidance effects on surface source pollutant intercepting and river and lake water purification.

The invention discloses a clay-based composite sorbent and a preparation method thereof. Raw materials of the sorbent consists of crylic acid, acrylamide, a surface active agent, amine persulfate, N,N-2 methylene-bis-acrylamide, and the balance being natural clay or modified clay. The clay-based composite sorbent has simple preparation process, and the obtained granule has high strength, large specific surface area and excellent selective adsorption; therefore, the sorbent can be widely applied to the treatment of lake water containing nitrogen, phosphorus, heavy metal ion and organic pollutants.

The invention provides an MODIS remote sensing monitoring method for the vertical distribution pattern of eutrophic lake water algae. The method includes: acquiring the vertical distribution pattern of the algae by means of field monitoring; on the basis of field measured water surface spectral information and environmental information, creating a ground measured spectral data (Rrs) based remote sensing monitoring method for vertical algae distribution; acquiring the quantitative relationship between ground monitoring and remote sensing reflectance Rrs and simulated Rrc after Rayleigh scattering correction by simulating different aerosol types and thicknesses and different solar altitudes, satellite observation angles and azimuthal angles; further promoting the ground measured spectral data based monitoring method for vertical algae distribution to MODIS satellite image data subjected to Rayleigh scattering correction. On the basis of the method, interannual and inter-monthly change rules and spatial distribution of the vertical distribution pattern of the eutrophic lake water algae can be acquired accurately, and scientific support is provided for scientific decision-making on water resource management and water environment protection water conservancy and environmental protection departments.

The invention discloses a eutrophic substance removing method for lake water body and a device. A groove shaped water channel is arranged in the middle of a floating bed, and an aeration system, a flocculant automatic distribution and a feeding system, a stirrer set, a magnetic separation system and a settlement tank or a filtering net are arranged on the channel in front-to-back sequence, and the front end and the back end of the channel are respectively provided with a water quality automatic detecting device. When the floating bed walks in the water body, water flow passes through the channel and is added with the flocculant, stirred, and flocs is formed, absorbed by the magnetic separation system and removed. The eutrophic substance removing method for lake water body can be industrialized and continuously operated with a large water treatment quantity conveniently and simply. The method is quite suitable for the treatment of the eutrophic substances in lakes.