CN114620836A

CN114620836A - Simulation method for lake and reservoir treatment stage

Info

Publication number: CN114620836A
Application number: CN202210294902.5A
Authority: CN
Inventors: 孟赫男; 沈会涛; 张茹春; 高士平; 蒋红军; 王瑞君; 王仁德; 李庆; 丁小燕
Original assignee: Institute Of Geography Hebei Academy Of Sciences
Current assignee: Institute Of Geography Hebei Academy Of Sciences
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-06-14

Abstract

The invention discloses a simulation method for lake and reservoir treatment stages, which specifically comprises the following steps: and (3) simulating eutrophic water environments of different levels in the water environment treatment process by adopting the in-situ water environment, monitoring the in-situ water quality and nutrition state of each water area, and selecting the closest water area. The invention simulates different stages in the lake (reservoir) treatment process by using the lake (reservoir) with different nutrition state grades in the space simulation time, and determines the treatment scheme on the space scale, thereby forming the targeted treatment scheme of the water body with different eutrophication degrees along with the gradual improvement of the water quality in the eutrophication treatment process.

Description

Simulation method for lake and reservoir treatment stage

Technical Field

The invention relates to the technical field of lake (reservoir) water environment treatment and lake (reservoir) ecological restoration, in particular to a simulation method for lake and reservoir treatment stages.

Background

Eutrophication is a phenomenon of water pollution caused by excessive content of plant nutrients such as nitrogen, phosphorus and the like. Under natural conditions, with the continuous sedimentation and sedimentation of rivers carrying with drift and remains of aquatic organisms at the bottom of lakes, lakes can transit from poor nutrition lakes to eutrophic lakes, and then develop into swamps and lands, which is a very slow process. However, due to the activities of human beings, after a large amount of industrial wastewater, domestic sewage and plant nutrient substances in farmland runoff are discharged into slow-flow water bodies such as lakes, reservoirs, estuaries, gulfs and the like, aquatic organisms, particularly algae, propagate in a large amount, the population number of biomass is changed, and the ecological balance of the water body is damaged.

In the process of treating the water environment of a lake (reservoir), the water environment quality is continuously changed, and the eutrophication degree is gradually reduced. In each stage of eutrophic treatment, the treatment scheme needs to be adjusted at any time according to different water environment qualities.

Therefore, how to simulate the water treatment process so as to adjust the treatment scheme according to different water environment quality is an urgent problem to be solved by the technical personnel in the field.

Disclosure of Invention

In view of the above, the present invention provides a simulation method for lake and reservoir treatment stages, and aims to provide technical support for lake (reservoir) treatment research and facilitate adjustment of treatment schemes in the lake (reservoir) treatment stages according to water quality conditions.

In order to achieve the purpose, the invention adopts the following technical scheme:

a simulation method for lake and reservoir treatment stages is characterized by comprising the following steps: in-situ water environment simulation is adopted to simulate eutrophic water environments of different levels in the water environment treatment process, the in-situ water quality nutrition state of each water area is monitored, and the closest water area is selected.

Further, the nutritional status is assessed by a comprehensive nutritional status index; the closest water area is the in-situ water environment which accords with three types of moderate eutrophication, light eutrophication and medium nutrition.

The beneficial effect of adopting the further technical scheme is that taking the white lake water area as an example, as the area of the basin is large, and the whole lake is divided into 143 lakes with different sizes by the ravines and valleys of 3700, the water quality is changeable and complex, and the method is very suitable for setting three types of water areas with rich nutrition degree. The fish and aquatic plants in the water area are determined according to the in-situ state, namely the water area is basically determined according to the nutrition state, and the in-situ state is respected by others to determine the reality of the simulation state.

Further, the simulation method for the lake and reservoir management stage further comprises the following steps: the method for harvesting the aquatic plants is adopted, nitrogen and phosphorus elements are absorbed and fixed by the aquatic plants, and then the nitrogen and phosphorus elements in the water body are reduced by harvesting the aquatic plants. Further, the aquatic plant is at least one of golden fish algae, potamogeton pectinatus, nutria aurea and golden fish algae.

The further technical scheme has the beneficial effects that the aquatic plants can be replaced due to different eutrophic water areas, namely the dominant species of the aquatic plants can be changed in the water environment treatment process. Taking the white ocean starch as an example, the dominant species of aquatic plants in the moderately eutrophic water areas are dactylotheca aurantiaca, potamogetus pectinatus and the like, and the dominant species of aquatic plants in the moderately eutrophic water areas are raccoon beaver algae, dactylotheca aurea and the like.

According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the invention simulates different stages in the treatment process of lakes (reservoirs) with different nutrition state grades by using space simulation time, determines the treatment scheme on the space scale, and forms the targeted treatment scheme of water bodies with different eutrophication degrees along with the gradual improvement of water quality in the eutrophication treatment process.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The simulation method of the lake and reservoir treatment stage specifically comprises the following steps:

(1) the in-situ water environment is adopted to simulate eutrophic water environments with different levels in the water environment treatment process, the in-situ water quality nutrition state of each water area is monitored, and the closest water area is selected, namely the in-situ water environment conforms to three types of moderate eutrophication, light eutrophication and medium eutrophication;

wherein the nutritional status is assessed by a comprehensive nutritional status index;

(2) the method for harvesting the aquatic plants is adopted, nitrogen and phosphorus elements are absorbed and fixed by the aquatic plants, and then the nitrogen and phosphorus elements in the water body are reduced by harvesting the aquatic plants;

wherein the aquatic plant is at least one of Aureobasidium macranthum, potamogetus crenulatus, and Aureobasidium macranthum.

Example 2

In the process of treating the white ocean lake water environment in the new area of Xiongan in the last few years, as the white ocean lake water areas are very wide and connected with the lakes, the water quality conditions are relatively complex, the water quality of different lake areas presents the states of medium eutrophication, light eutrophication and medium eutrophication, the medium eutrophication water area, the light eutrophication water area and the medium eutrophication water area can be used as research objects, three stages of water environment treatment, namely the medium eutrophication stage, the light eutrophication stage and the medium eutrophication stage, are simulated by space simulation time, and a targeted treatment scheme is adjusted according to the water quality conditions of each stage and the water plant succession conditions to form a set of complete treatment scheme from medium eutrophication to medium eutrophication.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A simulation method for lake and reservoir treatment stages is characterized by comprising the following steps: and (3) simulating eutrophic water environments of different levels in the water environment treatment process by adopting the in-situ water environment, monitoring the in-situ water quality and nutrition state of each water area, and selecting the closest water area.

2. The method of claim 1, wherein the nutrient status is assessed by a composite nutrient status index.

3. The method of claim 2, wherein the proximate waters are in an in situ environment conforming to three types of moderate eutrophication, mild eutrophication and medium eutrophication.

4. A method according to any one of claims 1 to 3, further comprising: the method for harvesting the aquatic plants is adopted, nitrogen and phosphorus elements are absorbed and fixed by the aquatic plants, and then the nitrogen and phosphorus elements in the water body are reduced by harvesting the aquatic plants.

5. The method of claim 4, wherein the aquatic plant is at least one of Goldfish algae, potamogeton pectinatus, nutria aurea and Goldfish algae.