Renovation method for lake aquatic ecosystem of south eutrophication city

An ecosystem and eutrophication technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problem of high cost, and achieve the effect of changing the sense of water body and avoiding waste of people, property and materials.

Active Publication Date: 2009-08-19
JINAN UNIVERSITY
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Problems solved by technology

In actual work, the method of manually salvaging aq

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiments and drawings, but the present invention is not limited to the following embodiments.

[0020] A shallow urban lake in the south of the Yangtze River was selected as the experimental lake. The lake is 3.58km long, 1.34km wide, and has a surface area of ​​1.48km 2 , the average depth of the lake is about 1.6m. It consists of 5 sub-lakes, each of which is relatively closed, and the exchange between water bodies is weak. The lake water used to be a source of natural recharge, mainly streams, and now it is mainly urban surface rainwater and lake surface precipitation in the catchment area, as well as some domestic sewage. . The lake has a relatively serious eutrophication problem, and the lake water is turbid and lacks vitality and vitality.

[0021] The improvement of the lake in the present invention takes the following specific implementation steps:

[0022] 1. Improvement of...

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Abstract

The invention belongs to the technical field of aquatic ecosystem recovery, and particularly discloses a southern eutrophicated city lake aquatic ecosystem recovery method. The method comprises the following steps: planting wild celery and breeding java tilapia in the lake based on removing original fishes in the lake and improving the transparency; and adjusting the quantity of the java tilapia so as to keep the balance between the wild celery and the java tilapia. The method makes use of the characteristic of the perennial growth in the southern areas of the submerged plant wild celery to keep a clear water body perennially. As the java tilapia eats attaching organisms and the leaves of the wild celery have characteristics, the length of the leaves of the wild celery is controlled and consequently the leaves of the wild celery cannot grow to the water surface to impact the landscape on the lake surface. Simultaneously, the quantity of the java tilapia is artificially controlled so as to keep the relative balance between the java tilapia and the wild celery, thereby reaching the aims of avoiding the waste of labor and material resources caused by aquatic weed salvaging, and bringing about certain economic effects through the harvested java tilapia.

Description

technical field [0001] The invention belongs to the technical field of aquatic ecosystem restoration, and in particular relates to a method for restoring the aquatic ecosystem of urban lakes in southern eutrophication. Background technique [0002] Most cities in my country have lake landscape water bodies of different sizes. Urban lakes are not only an integral part of society, economy and culture and become a symbol of a city, but also provide urban residents with entertainment and leisure places and are closely related to the lives of ordinary people, becoming an important part of the construction of a well-off life. [0003] Due to social and economic development and other reasons, most urban lakes are facing the severe situation of water environment pollution and lake eutrophication. Eutrophication is an abnormal phenomenon in which the primary productivity of aquatic ecosystems increases due to excessive enrichment of nitrogen, phosphorus and other nutrient elements i...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 刘正文钟萍张修峰
Owner JINAN UNIVERSITY
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