55 results about "Ecosystem health" patented technology

The invention discloses a grass and flower plant landscaping method adaptive to environmental changes. The grass and flower plant landscaping method comprises the following steps: landscaping arrangement and designing: a step of determining of a landscaping range and a landscaping area; soil improvement; transplanting and planting; mixed planting through autumn sowing and spring sowing; and regular maintenance and resowing. According to the invention, a manner of combining transplanting with sowing is ingeniously adopted for establishment of landscaping plants, and plants with outdoor sowing difficulty and large sizes are transplanted, so the effects of highly-efficient establishment and effective control of the growing area of a plant variety with strong extension ability are achieved; amixed sowing manner is combined to construct a natural grass and flower landscape, so the landscaping performance is improved and enriched; growing grass and flower plants are more adaptable to a current environment; the survival ability of landscape plants is reinforced; the biological diversity of the landscaping area can be significantly improved; and abundant grass and flower plant varieties are utilized to attract more and various beneficial insects, so improvement of the health degree of an ecological system in the landscaping area is promoted, and a more beneficial human living environment is fedback and improved.

The invention relates to a calculation method of the ecological water demand of a wetland based on the evaluation of the disturbance degree of an ecological system. The calculation method comprises the following steps: firstly analyzing the morphological features of the wetland, obtaining the key water level affecting the change of the area of water surface of the wetland according to the change rate of the area of the water surface of the wetland along with the change of the water level, and constructing a plurality of ecological water level schemes including the initial ecological water level scheme according to the key water level and the discrete result thereof; then applying the Mann-Kendall method to analyze water level time sequential value, finding out a mutation point of the change of the water level to determine the water level state under the natural condition; and further carrying out modified hydrological index evaluation on all the water level schemes on the basis, determining a series of wetland appropriate ecological water level schemes achieving the requirements on the health status of the ecological system and finally determining appropriate ecological water demand schemes. The calculation method can provide a series of the appropriate ecological water demand schemes which are applicable to different water supply conditions, ensure that the ecological system can not degenerate severely due to water shortage in different periods and lead the operability in the water resource management and configuration to be stronger.

A method for evaluating ecological restoration of a city watercourse is characterized by comprising the following steps that (A) a city watercourse ecological restoration evaluating system is established to be of a three-level evaluation system structure, the ecological restoration evaluating system serves as a large system, a second-level index serves as a rule layer is divided into three sub-systems of watercourse water quality condition, ecological system health and ecological landscape suitable degree, and third-level indexes represent a plurality of specific indexes and can directly reflect the total situation of each sub-system; (B) an evaluation step is executed: (B1) the watercourse to be evaluated is determined, and a sampling station is designed according to the length of the watercourse; (B2) sample acquisition and analysis are performed including (B21) physical and chemical indexes of water quality, (B22) ecological index (B23) ecological landscape suitable degree index; (B3) evaluation results are analyzed; (B4) the ecological health situation of the watercourse is judged. The method has the important significance on scientific evaluation on the ecological treatment effect of the watercourse and consolidation of ecological treatment results of the watercourse and is suitable for application in evaluation on the ecological restoration of the city watercourse.

The invention discloses a health evaluation method for a river mouth and bay ecological system. The method comprises the following steps of establishing a river mouth and bay ecological environment evaluation index system, determining an ecological environment evaluation index and weights of evaluation factors thereof, detecting and collecting the data of each evaluation factor of the ecological environment evaluation index and computing an index evaluation value, computing a water environment ecological index evaluation value of each station, computing a sea area evaluation value, and computing a health index of the river mouth and bay ecological system. An evaluation result obtained by using the evaluation method of the invention can basically reflect the pressure on an offshore area ecological system caused by relatively large artificial disturbances, including discharge to the sea, artificial breeding and petroleum pollutions, meanwhile can also reflect main pollution risk factors, and also plays a certain forewarning role with respect to potential pollutant factors, thus having a certain reference value and significance for reference, and being capable of providing scientific bases and guidance information to future ecological protection and management of the river mouth and bay ecological system.

The invention provides a method for calculating an ecological environment water demand threshold value, and particularly relates to a method for calculating ecological environment water demand based on an ecosystem health grade method and a restoration grade proposal method. The method uses ecosystems of various types comprising rivers, lakes, wet lands and dry land natural vegetation and urban natural systems as an interactional whole, divides the ecological environment water demand into different grades such as minimum, proper, ideal and the like according to the ecological environment water demand safe threshold value theory, and is contacted with the ecosystem health level so as to establish an integral estimation model of the ecological environment water demand. The method is closely connected with the health condition and restoration grade proposal of the ecosystem, and has the advantages of definite management target, consistency with related planning, strong systematization, easy data acquisition, simplicity and feasibility, and the like.

The invention relates to a biological chain constructing method suitable for improving the water quality of a shallow lake. In the method, biological combinations of different trophic levels are configured optionally, a shrimp-fish-shellfish-submerged plant biological chain with the ecological functions of reducing nutrient salt and controlling the growth of algae is constructed, and the water quality regulating and controlling functions of biological components are brought into full play on different levels. Through absorptive utilization and metabolic activity of nutrient elements, the nitrogen and phosphorus levels the lake are lowered effectively, the transparency of an aquatic plant growing region is increased, and the water quality is improved. The biological chain constructing method has the characteristics of economic efficiency, convenience, low energy consumption, remarkable water purifying effect, good economic benefit and short treatment period, and plays an important role in maintaining the health of a shallow lake ecological system for a long time.

The invention discloses an underground water ecological system health assessment method. An underground water microorganism integrity index serves as a judgment index. The method includes the following steps that a microbial community richness index is calculated, wherein microbial cells are collected, genome DNA is extracted, PCR amplification is conducted, a target band is cut for purification, and PCR products quantitatively obtained are subjected to paired-end sequencing; candidate biological parameters are determined, wherein a reference point and a damaged point are set, and parameters related to richness in the steps, parameters related to community composition and parameters related to interference resistance are selected as candidate parameters for calculating the biological integrity index; the value of the microbial integrity index is determined, wherein index value distribution range analysis and judgment capacity analysis are conducted, and biological parameters are screened; health detection of an ecological system is conducted by means of 95% quantile optimal value of the microorganism integrity index of the reference point in the steps. The method has high sensitivity and can quickly, sensitively, accurately, comprehensively and objectively reflect health conditions of the underground water ecological system.

The invention discloses an evaluation method for ecosystem health of coastal waters, which comprises the following steps: constructing an ecological environment evaluation index system of the coastal waters; determining the ecological environment evaluation indexes and the weights of evaluation factors thereof; detecting and collecting the data of each evaluation factor of the ecological environment evaluation index and calculating the evaluation values of the indexes; calculating the evaluation values of the water environment ecological indexes of each station; calculating the evaluation values of the costal waters; and calculating the ecosystem health indexes of coastal waters. The evaluation results obtained by the evaluation method proposed by this invention can basically reflect the large man-made disturbances, such as the pollution caused by sewage entering into the sea, artificial breeding, petroleum pollution and so on, which cause the pressure on the ecological system of the coastal waters, and the main pollution risk factors, and provides a certain role in early-stage warning for the potential pollutant factor. The invention has certain reference value and reference significance, which can provide scientific basis and guidance information for the ecological protection and management of the coastal water ecosystem in the future.

The invention relates to a river ecosystem-oriented scheduling function optimization method of a power generation reservoir. The optimization method comprises the following steps of: firstly, combining a reservoir-scheduling curve and a scheduling function; drawing a reservoir-scheduling rule; then, confirming a river-quantifying hydrologic regime disturbing method and a hydrologic regime disturbing threshold; using the optimization of reservoir-scheduling generated energy as a target; optimizing the parameters of the scheduling function by applying a genetic algorithm to; when estimating the suitability of the genetic algorithm, bestowing a low-suitability value to individuals beyond a water regime disturbing threshold range so as to ensure the survival of the individuals in the hydrologic regime disturbing threshold range and further obtain an individual with the maximum generated energy in the hydrologic regime disturbing threshold range to be the reservoir-scheduling function ensuring the health of the river ecosystem and having the maximum generated energy. The invention can surely prevent the operation of the reservoir from causing the acute degeneration of the river ecosystem and optimize the generated energy of the reservoir.

The invention relates to a simulating and monitoring device for health status of a wetland water ecological system, which is characterized by comprising a wetland environment information collection and adjustment and control device, a wetland ecological system simulating device, a wetland water dynamic environment simulating device and a water ecological health monitoring device, wherein the wetland environment information collection and adjustment and control device comprises a greenhouse, the peripheral wall of the greenhouse is provided with a greenhouse inlet, a fan and a side window, a skylight, a fluorescent lamp, a temperature sensor and an illumination sensor are arranged on a ceiling, a heating device is arranged inside the greenhouse, and a control cabinet and a computer are arranged outside the greenhouse; the wetland ecological system simulating device comprises a planting trough arranged in the greenhouse, the planting trough is connected with a drainage pipe, and an automatic water makeup system is arranged at the outer side of the planting trough; the wetland water dynamic environment simulating device comprises an automatic lifting power device and a water flow propeller; and the water ecological health monitoring device comprises an automatic lifting power device and a biological membrane culture device. The two automatic lifting power devices respectively comprise a motor arranged on the ceiling of the greenhouse; the motors are connected with a suspension cable winding shaft through a gearbox; a suspension cable is wound on the suspension cable winding shaft, and the other end of the suspension cable droops and is connected with the water flow propeller or the biological membrane culture device.

The invention relates to a method for determining the amount of available surface water of a river basin facing to the protection of a river ecosystem, which comprises the following steps: firstly determining the minimum ecological water requirement of a river, selecting an AAPFD index to measure the disturbance degree of hydrological regime of the river, establishing reservoir operation rules which combine a reservoir operation curve with ecological flow operation rules, then applying the genetic algorithm to optimize three optimization variables of parameters of the reservoir operation curve, applicable ecological discharge flow of a reservoir in each month and monthly planned water supply amount of the river basin on the basis of ensuring the minimum ecological water requirement of the reservoir and the disturbance of the hydrological regime of the river in the acceptable range, and obtaining the maximum amount of available water supply, that is the amount of available surface water of the river basin. The method can fully ensure the health of the river ecosystem, simultaneously overcome the shortcoming that the traditional calculation method can not precisely calculate the amount of unavailable flood discharge during the flood season and more accurately determine the amount of available surface water of the river basin.

The invention provides a method for assessing urban ecosystem health by an uncertain measure composite technology, belonging to the scientific field of urban ecological planning. The method comprisesthe steps that: a plurality of index factors reflecting 6 health factors of an ecological city are selected and are subject to simplification through Pearson correlativity analysis in SPSS tool, a classification criteria matrix for the uncertain measure is then established by ranking health assessments and checking entropy weight, and health level of the system is further checked. The method is extensively suitable for reasonably, comprehensively assessing urban, regional ecosystem health condition, and on the basis of which, can offer scientific theoretical foundation for urban ecological planning, and the method is also suitable for assessing regional scale ecosystem health.

The invention relates to a microbiological integrity index-based wetland ecosystem health evaluation method. The method comprises the following steps: 1) selecting multiple wetlands which can completely reflect the overall water quality and the aquatic ecosystem condition in the to-be-evaluated area, adopting the multiple wetlands as sampling points, and measuring 13 indexes; 2) filtering water samples, shearing a filtered filter membrane, transferring the samples into a crushing tube for DNA extraction, and carrying out PCR (polymerase chain reaction) amplification on obtained DNA samples; distinguishing the samples throughdifferent barcode sequences, distributing the total sequencing reading to all the samples, removing fuzzy bases included in the sequences, removing sequences with the primer mismatching conditionand containing more than six basic groups at the same time, filtering out low-quality sequences, and removing a primer sequence; 3) applying the weighted average regressionmethod to obtainan optimal value of each classification unit, and then determining the sensitive or tolerance classification unit of each key environmental factor. According to the method disclosed bythe invention, based on the biological parameter distribution range, the correlation analysis and the discrimination capability analysis, an M-IBI-based wetland ecosystem health evaluation system isobtained.

The invention discloses a method for improving the carbon fixation and carbon sink enhancement capabilities of a bamboo forest. The method includes the following steps: 1, biological carbon preparation, wherein crop straw, pruned branches and animal manure organic biomass are collected, dried, then placed in a biological carbonization furnace respectively, calcined and then carbonized to obtain biological carbon; 2, bamboo forest land selection which includes the steps of building the bamboo forest, transforming low-yield or degraded bamboo forest land and bamboo forest maintenance; 3, fertilization method and fertilization time. According to different characteristics of phyllostachys pubescens forest land, a biological carbon application method and a corresponding management measure are specifically designed so as to improve and fertilize bamboo forest soil and improve the soil productivity, positive effects of carbon sink enhancement and emission reduction are achieved, the resource utilization of forestry and agricultural residues is achieved, the forest soil is improved, the yield and quality of bamboo products are improved, the health level of a bamboo forest soil carbon pool and the health level of the ecological system are improved, and the method has a significant carbon sink function.

The invention belongs to the technical field of agro-ecological assessment, and discloses a method for health analysis of alpine meadow grassland ecosystem, and a computer. The method comprises steps:establishing a judgment matrix for the mutual relation of the elements located at the network layer, and obtaining the limit super matrix and the weights of each bottom index by using the analysis method of the network structure. By comparing with the existing method, the data obtained by the invention is more comprehensive and reasonable, and therefore, the health status of the grassland can beaccurately judged. The invention is convenient and practical for technicians and farmers and herdsmen, can effectively guide grass-roots technicians and farmers and herdsmen to carry out reasonable utilization and scientific management of the grassland, maintain the health status of the grassland ecosystem, and lay a foundation for the sustainable development of the grassland animal husbandry andthe sustainable exertion of the grassland ecological function.

The invention discloses an organic amendment capable of passivating Cu, Zn and Pb in soil of a vegetable field. The organic amendment is composed of the following components by mass percent: 10% to 50% of phosphate rock powder and 50% to 90% of wormcast. The organic amendment can be used for passivating heavy metals in contaminated soil, and especially used for passivating the Cu, the Zn and the Pb in the vegetable field soil which is moderately or slightly contaminated so as to decrease the content of the heavy metals in an acid extracting state, an oxidation state and other active states and increase the content of the heavy metals in an organic state, a residual state and other low active states, so that the content of the Cu, the Zn and the Pb in plants is obviously reduced, and a large quantity or an intermediate quantity of micronutrients required by the growth of the plants can be provided at the same time. Thus, the soil property is improved, the ecosystem health of the soil in the degraded vegetable field is restored, and the successive cropping obstacles of the soil are overcome. As a result, the yield and the quality of vegetables are improved.

The invention discloses a small artificial lake reservoir ecology health assessment method. The method comprises the steps of S1, performing analysis and confirmation on current situations of environments of regional lake reservoirs; S2, determining a structure of an assessment index system for characteristics of a target lake reservoir; S3, determining an assessment weight by adopting an analytichierarchy process, and performing parameter weight allocation according to an actual problem, thereby establishing an assessment standard system; S4, building a comprehensive assessment model, namely, an analytic hierarchy process-variable weight-fuzzy-grey correlation composite model; and S5, forming an ecology health assessment report, thereby finishing ecology system health assessment of a researched regional lake. The method has the beneficial effects that by comprehensively considering multiple influence factors, the ecology health of a small artificial lake reservoir is comprehensivelyanalyzed and assessed to obtain a more objective and accurate assessment result.

The present invention relates to a method of assessing the soil quality and health of mined and un-mined lands. The present invention further relates to a method of assessing ecosystem health and soil restoration efforts. The method employs a multi-prong approach combining DNA fingerprinting and in-depth pyrosequencing of soil microorganisms that are responsible for maintaining soil fertility and productivity. The method incorporates assessing the indigenous bacterial community structure data derived from PCR-DGGE analysis and 165 rRNA gene clone libraries, and then further identification of those microorganisms that are known to promote soil health by soil metagenome analysis. Disparity between un-mined and post-mined soils are comprehensively studied via multivariate statistical analyses on the polyphasic dataset.

The invention discloses an urban inland river ecosystem health evaluation method based on weights, comprising the following steps: (1) distinguishing a reference point and a damaged point; (2) establishing a candidate microbial parameter index database; (3) screening core microbial parameters and parameter assignment; (4) calculating the microbial integrity index and dividing it into evaluation grades; (5) testing the reliability of microbial integrity index. The invention integrates the principal component weighting method, the entropy weight method and the biological integrity index method to evaluate the urban inland river with the microorganism as the research object, which has strong sensitivity and can reflect the health status of the urban inland river ecosystem quickly, sensitively, accurately and comprehensively and objectively.

The present invention relates to a community optimization method of a low efficiency-water conservation forest. The method comprises the steps of surveying an indigenous plant community, and determining the current and historical distribution of the indigenous plant community; evaluating the plant community, and screening a plurality of introduction after-culture species facilitating improving a water conservation function; configuring two varieties or more than two varieties of trees of different ages for the landscapes of the low efficiency-water conservation forest according to the above screened introduction after-culture species to increase the degree of heterogeneity of the plant community in the horizontal space; managing the low efficiency-water conservation forest according to the main characteristics and the degeneration reasons of the community of the low efficiency-water conservation forest. The method of the present invention enables the water conservation function of an ecological system to be improved, at the same time, considers the coupling functions, such as the biodiversity protection, the soil conservation, etc., and promotes the healthy, stable and long-term development of the ecological system.

The invention discloses a health evaluation and diagnosis method for an urban landscape lake water ecosystem, and the method comprises the steps: designing an index system into a hierarchical structure which is divided into a target layer, a criterion layer and an index layer, wherein the target layer is the high summary of a lake health evaluation index system and is used for reflecting the overall level of a lake health condition, the criterion layer reflects attributes and levels of lake health conditions from different sides, including four aspects of water quality, bottom mud, biocenosis and lakeshore zone, the index layer is formed by selecting a plurality of indexes under the criterion layer, and the index evaluation is mainly quantitative and is assisted by qualitative. specifically dividing various factors influencing lake water quality health, performing assigning and scoring, determining evaluation weights of a criterion layer and an index layer by adopting an analytic hierarchy process, finally, evaluating the lake health condition according to a calculation result, and formulating corresponding restoration countermeasures.

The invention discloses an effective reservoir storage capacity determining method meeting the requirements of human and ecology, which comprises the following steps of: firstly, determining key parameter values (a planned ecological flow rate in a flood period, a starting point of a high-pulse flow rate and a minimum ecological water requirement) of an ecological flow rate required by a river, dividing an inflow current into four intervals according to an inflow current rate of a reservoir, and taking different ecological flow rate processes when the flow rate is within different intervals so as to meet the requirements on different ecological flow rates in different flow rate periods; secondly, through analogue computation, determining a maximum available water supply supplied to the human under the condition of meeting the planned ecological flow rate process; and finally, selecting the planned water supply in the range of the available water supply, and combining the planned water supply with the planned ecological flow rate process to obtain the effective reservoir storage capacity simultaneously meeting the requirements of the planned water supply and the planned ecological flow rate through a sequent-peak algorithm meeting the requirements of human and ecological water supply. Through the effective reservoir storage capacity determining method, planned water supply can be supplied to the human and the ecological flow rate needed by a river ecosystem can be supplied according to the human water needs and ecological water needs simultaneously, and the health of the river ecosystem is effectively protected.

The invention belongs to the field of environmental protection, and particularly relates to a lake benthic ecosystem health evaluation method which comprises the following steps: (1) determining sampling points and collecting samples; (2) establishing a comprehensive evaluation index system of a hierarchical structure; (3) calculating each index value, and determining a reference point; (4) screening each biological integrity index, and determining a biological integrity index scoring standard; (5) screening chemical integrity indexes, and determining a chemical integrity index scoring standard; (6) determining the relative weight in each index layer and between the layers by adopting an analytic hierarchy process; and (7) accumulating according to the weight to obtain an integrity score of the benthic ecosystem, and dividing health levels. The method can comprehensively and systematically reflect the real health state of the benthic ecosystem, so that a basis is provided for selectionof a pollution control technology in ecological management.

A pine forest health assessment method based on indexes of damage by Monochamus alternatus belongs to the fields of forest conservation, forest management and forest ecological system health, and includes the steps: firstly, selecting a sample land; secondly, investigating the indexes of damage by Monochamus alternatus within the land; thirdly, investigating health index of pine forest stands within the land; fourthly, building a regression model about the indexes of damage by Monochamus alternatus and health index of the pine forest; and fifthly, applying a pine forest health assessment model. By the pine forest health assessment method, the quantitative health index of pine forest stands is established, health conditions of similar forest stands can be conveniently and quickly assessed with the built regression model, operability is high, and accuracy and reliability of assessment results are high.

The invention discloses a small river ecological strengthening construction system, comprising concrete permeable ecological brick slope protection, concrete permeable ecological brick spur dam and unit ecological system cage; the concrete permeable ecological brick slope protection is arranged on both sides of the small river, and The bottom of the river extends to the bank of the small river; there are multiple concrete permeable ecological brick spurs, and they are arranged staggeredly on both sides of the small river along the extension direction of the small river; there are multiple unit ecosystem cages, and they are arranged in small inside the river. The small river ecological strengthening construction system of the present invention can construct the water ecosystem of small rivers in a short period of time, and the constructed ecological system is healthy and complete, has good effect, requires small infrastructure projects, is convenient for maintenance and management, and can be widely promoted.

The invention discloses a monitoring and management system of a city' s ecological health, which includes an acquisition module, which is used to acquire data; a monitoring module, which is used to classify, display, analyze and store a data and make a draft of the data; and a control module, which is used to set and adjust a system. The monitoring and management system of a city's ecological health can collect, monitor and analyze every indicator, dynamically manage changing indicators and continuously optimize the system to ensure that the system can be optimized to a large extent. The monitoring and management system of a city's ecological health can be applied to measure the ecosystem health of various cities, which are different in space. The monitoring and management system of a city's ecological health can also be applied to analyze the trend of a city's ecosystem health, which always changes in correspondence with time.

The invention provides a mining area waste dump ecological restoration effect evaluation method and system, and a storage medium. The method comprises the steps: obtaining plant community information,microbial community information and ecosystem health information in a sample after the ecological restoration of a mining area waste dump; obtaining vegetation response information after ecological restoration of the mine dump according to the plant community information in the sample, obtaining microbial response information after ecological restoration of the mine dump according to the microbial community information, and obtaining ecosystem response information after ecological restoration of the mine dump according to the ecosystem health information; and obtaining an evaluation result ofthe ecological restoration effect of the mine dump according to the vegetation response information, the microbial response information and the ecosystem response information after the ecological restoration of the mine dump. According to the scheme, when the ecological restoration effect of the mine dump is evaluated, the influence of plants, microorganisms and ecosystem health information in restoration evaluation is comprehensively considered, the regional environment difference between different mines is eliminated, and the evaluation is more accurate.

The invention discloses a plateau irrigation area pump gate point position and type identification method based on GF-2 and Lidar data, and the method comprises the following steps: taking a plateau irrigation area as a research area, and obtaining a GF-2 remote sensing image of the research area; extracting a research area ditch distribution vector diagram; extracting a ditch center line and extending the ditch center line; grading the ditch according to the characteristics of the ditch in the research area; performing intersection on channels of different grades to obtain the positions of pump brake points in the research area; carrying out hydrological module analysis in ArcGIS by utilizing Lidar data of a research area to obtain ditch network vector data with a flow direction; and judging the research area pump gate type according to the ditch network vector data with the flow direction, the research area pump gate point position and the ditch grade vector data. According to the method, the influence of manual regulation on the hydrological connectivity of the plain irrigation area can be known, and a referenceable scientific basis is provided for improving the health conditionof the rural ditch ecosystem and improving the overall allocation capability of water resources.

The invention belongs to the field of environment ecological protection, and particularly relates to a screening and weight determining method for a wetland ecosystem health evaluation index system. The method comprises the following steps of: selecting routine wetland monitoring indexes as candidate indexes of the wetland ecosystem health evaluation, screening core evaluation indexes according with wetland characteristics by using a factor analysis, and calculating the weight of each core index through a characteristic value, a variance contribution rate, an accumulated variance contribution rate and an original load value of a principal component corresponding to each core index. The evaluation index system established by the method is good in pertinence, and high in operability, and the problem that evaluation index data is difficult to acquire can be avoided to some extent; the weight is obtained by calculating an intermediate process value so that the calculation method is simple, and the obtained weight value is high in accuracy; and the method is convenient to popularize and apply.

The invention provides a fresh water ecosystem health evaluation method. The method comprises the steps: calculating the species number of a classification unit, the Shannon-Wienner diversity index, the relative abundance of pollution sensitive species, the relative abundance of anaerobic species and the species network modularization coefficient on the basis of the high-throughput sequencing technology, calculating the plankton integrity index through standardized parameters, and performing evaluation on the basis of the calculation result. According to the method, the anaerobic species relative abundance and the species network modularization coefficient are put forward for the first time, and the two indexes are combined with existing representative indexes to comprehensively reflect the influence of environmental changes on the plankton species richness, species diversity, pollution sensitivity, pollution tolerance and water ecological functions, so the evaluation accuracy is improved; and the evaluation process is simplified by proposing and combining the two indexes. Therefore, the method provided by the invention can quickly, accurately and sensitively reflect the health condition of the fresh water ecosystem, and is helpful for watershed managers to implement accurate and effective treatment measures.