Estuarine ecology water-demand calculation method of considering net ecosystem production of estuarine ecosystem

Abstract

The invention belongs to the technical field of environment protection, and particularly relates to an estuarine ecology water-demand calculation method of considering overall balance of an estuarineecosystem. The method comprises the following steps: 1) using an open-water-body dissolved-oxygen curve method to calculate three index values of estuarine metabolism, namely daily net ecosystem production (NEP), daily breathing and daily primary ecosystem production; 2) establish a model of response relationships of the net ecosystem production to estuarine freshwater input quantity and water temperature, and simulating response relationships of the net ecosystem production to flow and water temperature changes; and 3) calculating estuarine ecology water-demand quantity on the basis of the response relationship model and an estuarine ecosystem health standard. The method considers a functional index of the net ecosystem production reflecting an overall situation of the estuarine ecosystem, and provides practical technical support for estuarine ecology environment protection and restoration, and has significant pertinence; and the method is simple and easy to realize, avoids cumbersomecalculation work, is suitable for use in quantitative analysis of estuarine ecology water-demand of a country of us, and is high in practicality.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for calculating the ecological water demand of an estuary considering the overall balance of the estuary ecological system, and solves the problem of quantitatively calculating the ecological water demand of the estuary from the perspective of the ecological system. Background technique [0002] The estuary ecosystem is located in the confluence zone of land and sea, and has unique environmental characteristics such as the mixing of fresh water and nutrient enrichment, as well as important ecological service functions such as flood regulation and storage and maintenance of biodiversity. At the same time, the estuary is also one of the most densely populated and economically active areas in the world, with significant social service functions. However, in recent years, due to the continuous reduction of freshwater input, most estuaries in my c...

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Problems solved by technology

[0006] The current estuary ecological water demand analysis technology mainly calculates the corresponding water demand for specific ecological protection goals. The calculation method has the problem that it is difficult to ensure the overall balance of the ecosystem. Correspondingly, the current estuary ecological water demand calculation results will not be able to guarantee the overall health of the estuary ecosystem.

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