CN-121745000-B - System for determining proper elevation of mangrove restoration of culture pond based on tide level numerical simulation

CN121745000BCN 121745000 BCN121745000 BCN 121745000BCN-121745000-B

Abstract

The invention discloses a suitable elevation determining system for mangrove restoration of a culture pond based on tide level numerical simulation, and relates to the technical field of marine ecological restoration. The system comprises the steps of collecting basic data, establishing a three-dimensional hydrodynamic numerical model based on a hydrodynamic principle, simulating water level responses under different working conditions according to the basic data and a gate operation rule, calculating daily average flooding time of any given height Cheng Dian in a culture pond in a simulation period through statistical analysis, establishing a corresponding relation curve of different position elevations and the daily average flooding time, comparing flooding-resistant duration data of a target mangrove plant species with the corresponding relation curve by taking the data of the flooding-resistant duration of the target mangrove plant species as screening conditions, finally calculating a theoretical proper elevation range, and taking the proper elevation range determined under the working conditions as a basis for guiding repair of mangrove forests in the culture pond to be designed.

Inventors

SUN YUANMIN
ZENG ZHI
TANG KUNXIAN
HUANG HAIPING

Assignees

自然资源部第三海洋研究所

Dates

Publication Date: 20260508
Application Date: 20260227

Claims (6)

1. The system for determining the proper elevation of the mangrove restoration of the culture pond based on the tide level numerical simulation is characterized by comprising an acquisition processing module, a tide level model module, a scene simulation module, a relation analysis module, a screening comparison module and an optimizing decision module; the acquisition processing module acquires basic data of the target culture pond and the surrounding area and preprocesses the basic data; The basic data comprise plane layout diagram data of a culture pond, existing gate data, elevation data of pond bottom and embankment, historical tide level observation data, expected design parameter data of a new gate planned to be modified and flooding-resistant duration data of one or more mangrove plant species of target planting; The tide level model module is used for establishing a three-dimensional hydrodynamic force numerical model covering the culture pond and the surrounding area based on the hydrodynamic principle, and calibrating and verifying the three-dimensional hydrodynamic force numerical model according to the basic data; The scene simulation module is used for simulating water level response of different gate operation conditions according to basic data and gate operation rules based on the rated and verified three-dimensional hydrodynamic force numerical model; the relation analysis module is used for carrying out statistical analysis based on the water level response of the simulation output, calculating the daily average flooding time of any given height Cheng Dian in the culture pond in the simulation period, and establishing a corresponding relation curve of the elevations of different positions in the culture pond and the daily average flooding time; screening and comparing the flood-resistant duration data of the target mangrove plant species as screening conditions and comparing the flood-resistant duration data with the corresponding relation curve; The optimizing decision module is used for calculating a theoretical suitable elevation range based on the optimal water level response of different gate operation conditions, and taking the determined suitable elevation range under the conditions as a basis for guiding the elevation design of the mangrove planting and cultivating coupling restoration planting area; In the scene simulation module, N rounds of random simulation are performed on M gate operation conditions in a preset interval, the simulation quantity is in a preset interval, the three-dimensional tide fields input by each round of simulation are different, and the similarity is smaller than a threshold value; initializing the gate operation condition based on the initial time sequence; taking three-dimensional tide fields with different time sequences as analog input to obtain M water level responses; Evaluating the discreteness of the three-dimensional tide field of each time sequence in N rounds of random simulation through periodic iterative simulation for not less than 15 days, and calculating a stability coefficient; taking the simulation quantity as an abscissa and the water level response as an ordinate; calculating the local discreteness of the corresponding water level response in N rounds of simulation respectively; after normalizing the simulation quantity of N rounds, taking the normalized simulation quantity as the weight of each simulation quantity of the abscissa, carrying out weighted fusion on the local discreteness, and calculating to obtain the stability coefficient; And selecting the water level response with the maximum stability coefficient as the optimal water level response of the gate operation state corresponding to the time sequence.
2. The tide level numerical simulation-based system for determining proper elevation of mangrove restoration of a culture pond according to claim 1, wherein the system comprises: In the acquisition processing module, the acquisition is carried out through field actual measurement and unmanned ship aerial survey; the pretreatment specifically comprises the following steps: Detecting the missing value of the basic data and deleting the corresponding missing value record; Detecting the extreme value, drift, repeated record and high null value proportion of the basic data, and deleting; projecting the plane layout diagram data, the pond bottom and the elevation data of the embankment to a unified coordinate system based on a GPS system; aligning the elevation of the pond bottom and the embankment to a water level surface of 0 m; detecting the consistency of the position, the size and the current elevation of the gate, removing repeated data and correcting coordinate errors; And checking the self-consistency of the new gate type, the opening and closing logic and the logic constraint.
3. The tide level numerical simulation-based system for determining proper elevation of mangrove restoration of a culture pond according to claim 1, wherein the system comprises: In the tide level model module, mapping the culture pond and the peripheral area to a three-dimensional network based on the basic data and the hydrodynamic principle, and constructing a three-dimensional hydrodynamic numerical model; Performing horizontal discretization and vertical discretization on the three-dimensional hydrodynamic force numerical model; Defining initial water depth and boundary conditions of the three-dimensional hydrodynamic numerical model according to the basic data; the boundary conditions comprise tide level driving of an open boundary, a boundary between a shore boundary and a pool bottom, a gate coupling boundary, wind stress and air pressure source items; Inputting basic data for preliminary operation, and outputting a three-dimensional tide field; Monitoring the three-dimensional tide level field in the running process, comparing the three-dimensional tide level field monitored by history, and calculating deviation of the two to perform calibration and verification.
4. The tide level numerical simulation-based system for determining proper elevation of mangrove restoration of a culture pond according to claim 1, wherein the system comprises: in the relation analysis module, initializing daily average flooding time for any given elevation point; Resampling the time sequence of the water level response to daily granularity, and judging whether the current water level response submerges the surface elevation of any given elevation point at the time of day; Any given Gao Chengdian is paired with the daily average water flooding time, and a corresponding relation curve of the elevations of different positions in the culture pond and the daily average water flooding time is established through numerical integration.
5. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the module of the system for determining the suitability of a mangrove restoration elevation of a culture pond based on tide level numerical simulation as set forth in any one of claims 1 to 4.
6. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a module of a system for determining a suitable elevation for mangrove restoration of a pond based on a tidal level numerical simulation as set forth in any one of claims 1 to 4.

Description

System for determining proper elevation of mangrove restoration of culture pond based on tide level numerical simulation Technical Field The invention relates to the technical field of marine ecological restoration, in particular to a system for determining a proper elevation for mangrove restoration of a culture pond based on tide level numerical simulation. Background Mangrove is an important ecological system growing in the intertidal zone of tropical and subtropical coasts, and has the important functions of wave elimination, shore protection, carbon fixation, carbon storage, water quality purification and biodiversity maintenance. The traditional coastal aquaculture ponds (such as fish ponds and shrimp ponds) occupy the distribution space of the coastal zone ecosystems of mangrove forests, salt marsh and the like, and the traditional cultivation mode also brings a plurality of ecological environment problems and damages the marine ecological environment. The mangrove planting and breeding coupling mode is a sustainable ecological breeding mode, and aims to form a coupling system of 'mangrove-aquaculture' reciprocal symbiosis by planting mangrove in a breeding pond. The mangrove plant can directly or indirectly provide bait for the cultivated organism, improve the cultivation environment, and the excrement of the cultivated organism can provide nutrient substances for the growth of mangrove forest, thereby realizing win-win of ecological protection and economic development. One of the key technologies of the repair mode is to determine and construct a suitable elevation area for mangrove growth in a culture pond, and the mangrove seedlings are anoxic and dead due to overlong flooding time, and the mangrove plants are dead due to overlong exposure time to the water surface, so that the ecological repair purpose can not be achieved. In the prior art, determining the pleasant elevation of mangrove is based on field investigation and empirical judgment, or estimated based on the local mangrove distribution range on natural tidal flat. However, for a semi-closed artificial system of a gated pond, the internal water level is regulated by an artificial gate, which is significantly different from the natural tidal process. The planting is directly carried out in the pond by referencing the elevation of the natural beach, which can cause the failure of mismatching of the flooding system. At present, a scientific and quantitative method for guiding how to accurately determine the proper elevation of mangrove planting in a culture pond is lacking, and the method becomes a bottleneck for popularizing the mode. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to provide a suitable elevation determining system for mangrove restoration of a culture pond based on tide level numerical simulation, so as to solve the problems in the background art. In order to achieve the aim, the invention provides the technical scheme that the system for determining the proper elevation of the mangrove restoration of the culture pond based on the tide level numerical simulation specifically comprises an acquisition processing module, a tide level model module, a scene simulation module, a relation analysis module, a screening comparison module and an optimizing decision module; the acquisition processing module acquires basic data of the target culture pond and the surrounding area and preprocesses the basic data; The tide level model module is used for establishing a three-dimensional hydrodynamic force numerical model covering the culture pond and the surrounding area based on the hydrodynamic principle, and calibrating and verifying the three-dimensional hydrodynamic force numerical model according to the basic data; The scene simulation module is used for simulating water level response of different gate operation conditions according to basic data and gate operation rules based on the rated and verified three-dimensional hydrodynamic force numerical model; the relation analysis module is used for carrying out statistical analysis based on the water level response of the simulation output, calculating the daily average flooding time of any given height Cheng Dian in the culture pond in the simulation period, and establishing a corresponding relation curve of the elevations of different positions in the culture pond and the daily average flooding time; screening and comparing the flood-resistant duration data of the target mangrove plant species as screening conditions and comparing the flood-resistant duration data with the corresponding relation curve; and the optimizing decision module is used for calculating a theoretical proper elevation range based on the optimal wa