CN-122022394-A - Enteromorpha green tide salvage ship allocation determination method

CN122022394ACN 122022394 ACN122022394 ACN 122022394ACN-122022394-A

Abstract

The invention discloses a method for determining the allocation of enteromorpha green tide salvage ships, and belongs to the field of enteromorpha green tide prevention and control. The method comprises the steps of a, constructing a biomass estimation model based on enteromorpha green tide satellite remote sensing data and field monitoring data, b, constructing a biomass-salvage amount conversion model, c, constructing calculation models of salvage efficiency under different sea conditions and different salvage modes, d, constructing a salvage ship allocation model based on the biomass estimation model, the biomass-salvage amount conversion model and the calculation models of salvage efficiency under different sea conditions and different salvage modes, e, acquiring enteromorpha green tide satellite remote sensing data of the sea area according to the defined sea area range, and determining the required quantity of salvage ships based on the salvage ship allocation model constructed in the step d, and performing salvage ship allocation. According to the invention, by constructing a salvage ship allocation model and the like and based on a dynamic allocation strategy of refined classification, the scientificity and the operation efficiency of ship resource scheduling are obviously improved.

Inventors

GAO SONG
WU LINGJUAN
YUAN CHAO
BI FAN
FENG JIE
XU JIANGLING

Assignees

自然资源部北海预报减灾中心(自然资源部青岛海洋中心)

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (8)

1. The method for determining the deployment of the enteromorpha green tide salvage ship is characterized by comprising the following steps of: a. building a biomass estimation model based on enteromorpha green tide satellite remote sensing data and on-site monitoring data; b. Constructing a biomass-salvage amount conversion model; c. constructing calculation models of salvage efficiency under different sea conditions and different salvage modes; d. constructing a salvage ship allocation model based on a biomass estimation model, a biomass-salvage amount conversion model and calculation models of salvage efficiency under different sea conditions and different salvage modes; e. And d, acquiring enteromorpha green tide satellite remote sensing data of the sea area range according to the defined sea area range, determining the required quantity of the salvage ships based on the salvage ship allocation model constructed in the step d, and allocating the salvage ships.
2. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 1, wherein the step a comprises the following steps: a1, collecting field biomass monitoring data of the green tide of the enteromorpha in different development stages and different areas of different sea areas; A2, selecting a sunny weather satellite image in a period corresponding to the on-site biomass monitoring data, and interpreting the satellite image to obtain enteromorpha green tide satellite remote sensing data; A3, carrying out correlation analysis on the enteromorpha green tide satellite remote sensing data and the on-site biomass monitoring data, classifying the on-site biomass in unit area into two types based on the enteromorpha green tide satellite remote sensing data, namely the biomass in unit area of a dense area and the biomass in unit area of a sparse area, and calculating a median value of the biomass in unit area of the dense area and a median value of the biomass in unit area of the sparse area respectively; a4, constructing a biomass estimation model based on enteromorpha green tide satellite remote sensing data, which comprises the following steps: (1) In the formula (1), W is the green tide biomass of the floating enteromorpha demarcating the sea area or a certain plaque in the sea area, K i is the biomass of the unit area of the ith pixel point, K i is the median of the biomass of the unit area of the dense area when being identified as the dense area, K i is the median of the biomass of the unit area of the sparse area when being identified as the sparse area, S i is the coverage area of the ith pixel point; and determining the total biomass of the enteromorpha green tide in a certain plaque or a certain sea area through a biomass estimation model.
3. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 2, which is characterized by comprising the following steps: in a1, the on-site biomass of the green tide of the floating enteromorpha is biomass after water is drained, and the biomass data is not less than 100; in a2, the selected satellite image is a satellite image with the resolution ratio of more than 50 meters, the satellite image utilizes the NDVI index to extract the green tide information of the enteromorpha to obtain the distribution range, the longitude and latitude positions and the coverage area corresponding to each pixel of the enteromorpha; In a3, correlation analysis finds that the dense region corresponds to a high biomass region monitored on site and the sparse region corresponds to a low biomass region monitored on site according to the enteromorpha green tide satellite remote sensing data; and a4, carrying out plaque clustering identification, namely carrying out plaque division on enteromorpha green tide scattering points extracted by satellite remote sensing by adopting a spatial clustering method based on density, and identifying pixels with aggregation characteristics on spatial distribution as independent enteromorpha green tide plaques.
4. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 2, wherein the step b comprises the following steps: b1, collecting sea enteromorpha green tide salvage test data, wherein the sea enteromorpha green tide salvage test data comprises biomass in unit area, salvaged coverage area of test plaques and salvaged amount of the test plaques; b2, calculating the biomass of the test plaque by adopting a formula (1) based on the biomass of the unit area and the salvaged coverage area of the test plaque, and then constructing a biomass-salvage amount conversion model based on the biomass of the test plaque obtained by calculation and corresponding test plaque salvage amount data, wherein the formula is as follows: (2) in the formula (2), W is the total biomass of green tide of the enteromorpha in the test plaque, Q is the salvage amount, and a and b are fitting parameters.
5. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 4, wherein the step b1 comprises the following steps: the enteromorpha salvaging mode comprises attack and catch ship salvaging and automatic mechanical salvaging; collecting enteromorpha green tide salvage test data of different sea areas in different development stages, wherein the data comprise sea conditions, test plaque coverage areas, salvage amount and biomass monitoring results in unit area, and the number of the test data is not less than 25; Collecting salvaging test data of the attack and spam net ship and automatic mechanical salvaging test data, wherein the salvaging test data of the attack and spam net ship need to comprise test data in a green tide distribution dense area, a sparse area and different sea conditions of enteromorpha, and each condition at least comprises more than 5, wherein the number of the automatic mechanical salvaging test data is not less than 5; and simultaneously, acquiring satellite remote sensing data of the current day by utilizing the salvage test data, and verifying a biomass estimation model.
6. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 4, wherein the step c comprises the following steps: c1, calculating the salvaging efficiency of each test ship when the attack and catch net ship is salvaged, wherein the formula is as follows: (3) in the formula (3): I=1, 2, & gt, n, n is the total test number, t ij is the operation time of the j-th salvage ship in the i-th test, j=1, 2, & gt, m; The salvage amount of the ith test; Dividing the calculated ship salvaging efficiency C i into four groups of working conditions according to sea conditions and enteromorpha green tide distribution conditions: The method comprises the following steps of working conditions 1, namely, severe sea conditions and belongs to an enteromorpha green tide distribution dense region, working conditions 2, namely, good sea conditions and belongs to an enteromorpha green tide distribution dense region, working conditions 3, namely, severe sea conditions and belongs to an enteromorpha green tide distribution sparse region, and working conditions 4, namely, good sea conditions and belongs to an enteromorpha green tide distribution sparse region; the four groups of data are respectively counted and averaged to obtain the average salvage efficiency under different working conditions, and the calculation formula is as follows: (4) In the formula (4), k represents different working conditions, k=1, 2,3,4, D k is average salvage efficiency under the working condition k, C kl is salvage efficiency of the ship under the working condition k in the first test, l=1, 2, h is the number of effective test data under the working condition; And c2, when salvaging the ship by aiming at the automatic mechanical salvage, acquiring the average salvage efficiency of the ship based on n salvage tests, wherein the calculation formula is as follows: (5) In the formula (5), B is the average salvage efficiency of the ship, i=1, 2, n, n is the total test times, t ij is the operation time of the j salvage ship in the ith test, j=1, 2, m; The salvage amount for the ith test.
7. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 6, wherein the step d comprises the following steps: d1, under the condition of severe sea conditions, fishing by adopting a attack and catch net ship, wherein the calculation formula of the ship number is as follows: (6) In the formula (6), N 1 is the number of the required attack and catch net ships, the ship is rounded upwards, Q s is the salvage amount of a sparse area, Q d is the salvage amount of a dense area, T is the salvage time, and D 1 、D 3 is calculated by adopting the formula (4); d2, under good sea conditions, the sparse area only adopts the attack and catch net ship for salvaging, the dense area adopts the attack and catch net ship and/or the automatic mechanical salvage ship for salvaging, the number of the ship V is smaller than the minimum required ship number under the condition that all the automatic mechanical salvage ships are adopted, and at the moment, the calculation formula of the required attack and catch net ship number is as follows: (7) In the formula (7), N 2 is the number of the required attack and catch net ships, the number is rounded upwards, V is the number of the automatic mechanical salvage ships, Q s is the salvage amount of a sparse area, Q d is the salvage amount of a dense area, T is the salvage time to be salvaged, D 2 、D 4 is calculated by adopting the formula (4), and B is the average salvage efficiency of the automatic mechanical salvage ships; If there are only sparse regions, then Q d and V are 0.
8. The method for determining the deployment of the enteromorpha green tide salvage ship according to claim 7, wherein the step e comprises the following steps: e1, distinguishing a dense area and a sparse area based on satellite remote sensing monitoring data according to the defined sea area range; e2, respectively calculating the total biomass of green tide of the enteromorpha in the dense region and the sparse region according to the formula (1); e3, respectively calculating the salvage amounts corresponding to the dense area and the sparse area according to the formula (2); And e4, determining sea conditions according to weather sea condition forecast, selecting a formula (7) or a formula (8), calculating the required quantity of the attack and spam ships and the automatic mechanical salvage ships, and finally providing ship allocation schemes of different salvage modes.

Description

Enteromorpha green tide salvage ship allocation determination method Technical Field The invention relates to the field of green tide prevention and control of enteromorpha, in particular to a method for determining allocation of green tide salvage ships of enteromorpha. Background The enteromorpha green tide has the characteristics of high biomass, long-distance migration process and great influence. The green tide prevention and control work of enteromorpha is a great task in the ocean field. Salvaging on the sea, intercepting near the shore and cleaning the beach are three defense lines for preventing and controlling green tide of enteromorpha. How to accurately determine the number of ships according to complex sea conditions and enteromorpha distribution conditions in the offshore salvaging process, and further, the allocation of ships becomes a problem to be solved urgently. On one hand, the existing method mostly adopts simple correspondence between coverage area and biomass, and dynamic matching relation between space-time density of remote sensing observation and actual on-site monitoring biomass data cannot be fully considered, so that biomass estimation accuracy is limited, and reasonable allocation of subsequent salvaged ships is affected. In addition, in actual salvage operations, the salvage amount of enteromorpha is usually counted in units of ton bags. However, because the draining standard of the green tide of the enteromorpha after salvaging is often inconsistent with the water content state during on-site biomass monitoring, and factors such as the water content carried by the algae in the offshore operation environment, the compaction degree and the like are difficult to uniformly control, significant deviation often occurs between the remote sensing biomass estimated value and the actual salvage amount for specific enteromorpha plaques. Meanwhile, related researches at home and abroad mostly adopt a single and average salvage efficiency concept, and the comprehensive influence of specific working conditions such as sea condition, enteromorpha distribution density and the like on the salvage efficiency is not comprehensively considered. These factors not only restrict the accurate assessment of the fishing efficiency, but also bring significant uncertainty to the ship scheduling and operation optimization. Disclosure of Invention Based on the technical problems, the invention provides a method for determining the allocation of enteromorpha green tide salvage ships. The technical scheme adopted by the invention is as follows: An enteromorpha green tide salvage ship allocation determination method comprises the following steps: a. building a biomass estimation model based on enteromorpha green tide satellite remote sensing data and on-site monitoring data; b. Constructing a biomass-salvage amount conversion model; c. constructing calculation models of salvage efficiency under different sea conditions and different salvage modes; d. constructing a salvage ship allocation model based on a biomass estimation model, a biomass-salvage amount conversion model and calculation models of salvage efficiency under different sea conditions and different salvage modes; e. And d, acquiring enteromorpha green tide satellite remote sensing data of the sea area range according to the defined sea area range, determining the required quantity of the salvage ships based on the salvage ship allocation model constructed in the step d, and allocating the salvage ships. The beneficial technical effects of the invention are as follows: (1) The invention constructs a biomass estimation model based on enteromorpha green tide remote sensing concentration and on-site monitoring. The quantitative relationship between the Enteromorpha prolifera concentration obtained by the system analysis satellite remote sensing and a large amount of on-site monitoring biomass is established, a deep coupling model between the Enteromorpha prolifera concentration and the large amount of on-site monitoring biomass is established, the limitation of remote sensing data and on-site biomass dislocation in the traditional method is overcome, and the high-precision and real-time dynamic estimation of the Enteromorpha prolifera biomass in a large area is realized for the first time. (2) The invention also innovatively introduces a biomass-salvage amount conversion model, and the model establishes a quantifiable conversion relationship between the monitored theoretical biomass (W) and the actual operation salvage amount (Q) through field test data fitting parameters, so that the problem of difference between remote sensing and actual salvage is effectively solved, the actual application value of a remote sensing biomass estimation result is obviously improved, and the remote sensing biomass estimation result can be directly used for salvage operation decision. (3) The invention further creates a fishing efficiency calculation method and a dynam