Water ecological function zoning based river close-to-nature condition evaluation method

Abstract

The invention discloses a water ecological function zoning based river close-to-nature condition evaluation method, which comprises the steps of (1) selecting a corresponding river on which close-to-nature condition evaluation is performed; (2) selecting reference points; (3) selecting indexes; (4) performing data standardization; (5) determining the weight; (6) determining the scoring standard; and (7) carrying out river close-to-nature condition judgment. The water ecological function zoning based river close-to-nature condition evaluation method adopts a statistical method to determine the index layer weight, is objective, simple and convenient in determination method, not only takes sustainable development and ecological protection into account, but also reduces a result error brought about by expert scoring or technician experience and is consistent with the idea of water environment zoning and grading management in China. According to the invention, the evaluation method is simplified through directly setting the river close-to-nature condition evaluation standard on a target layer, thereby being convenient for an environment manager to establish scoring standard systems for different water bodies quickly, and expanding the application range of the method.

Description

technical field

[0001] The invention relates to a method for evaluating the near-natural state of a river based on water ecological function zoning. Background technique

[0002] The ecological degradation of rivers has become a global environmental problem and has attracted widespread attention at home and abroad. my country is a country with many rivers, but more than 2 / 3 of the rivers are disturbed by human activities to varying degrees. With the rapid development of social economy and the improvement of national environmental protection awareness, people's requirements for ecological restoration or recovery of degraded river ecosystems are becoming more and more urgent. Traditional river management projects are mostly based on the premise of flood control and drought relief, resulting in poor horizontal and vertical connectivity of the river, which in turn affects the health of the river ecosystem, reduces the self-purification ability, self-recovery ability and ecologi...

Examples

Embodiment 1

[0066] The specific description of the present invention will be described below taking the main stream section of the Wutong River, a primary tributary of the Songhua River in Heilongjiang Province, as an example.

[0067] (1) The Wutong River originates from the Zhewen Mountains in the Xiaoxinganling Mountains, and is located in the hills at the southern foot of the Xiaoxinganling Mountains and the transition to the plains in front of the mountains. The water catchment area of ​​the whole basin is 4,763 square kilometers, of which the mountainous area accounts for 80.5% of the basin area. Below the Baoquanling hydrological station, it enters the plain and flows into the Songhua River at the Nantun of Wutong River Farm. The main river section is 120 kilometers long. The evaluation section Concentrated in the middle and lower reaches, with a total length of 58km. The Wutong River is a typical river in high-latitude cold regions. The ice-covered period is about 142 days. It is ...

technical field

[0001] The invention relates to a method for evaluating the near-natural state of a river based on water ecological function zoning. Background technique

[0002] The ecological degradation of rivers has become a global environmental problem and has attracted widespread attention at home and abroad. my country is a country with many rivers, but more than 2 / 3 of the rivers are disturbed by human activities to varying degrees. With the rapid development of social economy and the improvement of national environmental protection awareness, people's requirements for ecological restoration or recovery of degraded river ecosystems are becoming more and more urgent. Traditional river management projects are mostly based on the premise of flood control and drought relief, resulting in poor horizontal and vertical connectivity of the river, which in turn affects the health of the river ecosystem, reduces the self-purification ability, self-recovery ability and ecologi...

Examples

Embodiment 1

[0066] The specific description of the present invention will be described below taking the main stream section of the Wutong River, a primary tributary of the Songhua River in Heilongjiang Province, as an example.

[0067] (1) The Wutong River originates from the Zhewen Mountains in the Xiaoxinganling Mountains, and is located in the hills at the southern foot of the Xiaoxinganling Mountains and the transition to the plains in front of the mountains. The water catchment area of ​​the whole basin is 4,763 square kilometers, of which the mountainous area accounts for 80.5% of the basin area. Below the Baoquanling hydrological station, it enters the plain and flows into the Songhua River at the Nantun of Wutong River Farm. The main river section is 120 kilometers long. The evaluation section Concentrated in the middle and lower reaches, with a total length of 58km. The Wutong River is a typical river in high-latitude cold regions. The ice-covered period is about 142 days. It is ...

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