River ecological flow determining method with benthos diversity as target

Abstract

The invention provides a river ecological flow determining method with the benthos diversity as a target. By means of the method, the research methods of ecological water requirements are enriched, and meanwhile, the ecological flow determining method with benthos as indicator organisms is provided. The method comprises the steps that river segment selection is researched; the benthos in a river segment are researched and ecological environment elements are inspected on site; the type of a benthos habitat and the characteristic parameter threshold value of the benthos habitat are determined; the optimal type of the benthos habitat which maintain the benthos diverse is determined; the fluvial geomorphology measurement of the river segment is researched; a two-dimensional hydrodynamics modelis constructed; the benthos habitat of the river segment is simulated in different flows; the optimal flow for maintaining the benthos diverse is determined. The method has the advantages that the ecological flow which enables the benthos diversity to be highest can be very accurately obtained, and the problem that by means of a general ecological flow determining method, the result cannot reflect the actual demands of aquatic organisms is solved.

Description

technical field [0001] The invention belongs to the field of ecological water conservancy, and relates to a river ecological flow determination method aiming at benthic biological diversity. Background technique [0002] Natural water regimes are key to the health and integrity of river ecosystems and are the primary drivers of the diversity and abundance of river-floodplain ecosystems. During the long-term evolution process, different biological groups have gradually formed life history strategies that are compatible with natural water flow regimes. However, in modern times, many human activities, such as the continuous construction of various water-related projects, the massive discharge of pollutants, and the acceleration of urbanization, have changed the natural water flow system of the river and replaced it with an artificial water flow system. It may meet the water demand for hydropower, irrigation, industry and agriculture, and life for human development, but its hyd...

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Problems solved by technology

Invention patent "Estimation method of estuary ecological water demand based on shellfish-coupled biomarker response (application number: 2014107271517)", although aquatic shellfish are used as indicator organisms, it belongs to the field of estuary ecological water demand calculation. Inventions are also obviously different; the invention patent "Bathythometer for Environmental Flow Estimation Method for Benthic Animal Protection Target" (application number: 201510350529) mentions the ecological water requirement of benthic animals, but it is actually a kind of water measurement The patent of the instrument is not a patent on the research method of ecological water demand, which is completely different from the present invention

[0005] Therefore, there are currently no related patents on the method of determining the ecological water demand of rivers using benthic animals as indicator organisms

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