A system for measuring the flux of nutrients from rivers into the sea

Abstract

The invention discloses a nutrient salt flux measuring system for a river emptying into a sea, and relates to flux online analysis system. The nutrient salt flux measuring system comprises a control system, a river cross section area measurement module, a high-frequency acoustic flow velocity measurement module and a nutrient salt online measurement module, wherein the control system is used for carrying out controlling, data collection and data processing on the river cross section area measurement module, the high-frequency acoustic flow velocity measurement module and the nutrient salt online measurement module; the river cross section area measurement module is provided with an acoustic sounder, a digital sensor and a water level indicator, the high-frequency acoustic flow velocity measurement module is provided with a GPS, an acoustic energy converter, a data acquisition card and a hydrophone, and the nutrient salt online measurement module is provided with a light-emitting diode drive circuit, a light-emitting diode, a valve pump control circuit, a three-way solenoid valve, a sample injection peristaltic pump, a reagent peristaltic pump, a data acquisition circuit, a photoelectric detector, a purified water bottle, a sample bottle, a reagent bottle, a three-way pipe, a reaction coil, a flow cell and a waste liquid collection bottle.

Description

technical field [0001] The invention relates to a flux online analysis system, in particular to a system for measuring the flux of nutrient salts flowing into the sea from rivers. Background technique [0002] Nutrient flux has been found to increase significantly in many rivers around the world due to the increase in population in the basin, the large increase in livestock breeding and fertilizer application, the increase in the hydraulic retention time of rivers due to the construction of dams, and the impact of climate change and land use change on weathering and erosion of the basin. This change in the nutrient status of the river has had a great impact on the coastal ecosystem, causing environmental problems such as intensified eutrophication, frequent red tides, and seasonal bottom-floor hypoxia. The pollution of my country's coastal waters has become increasingly serious, and water quality exceeding the standard is common, especially inorganic nitrogen and phosphorus....

AI Technical Summary

Problems solved by technology

However, in terms of monitoring at present, there are problems such as the independent hydrology and water quality monitoring systems, different monitoring stations, lack of integration of monitoring equipment, and high operating costs. The basic needs of dynamic monitoring

At the same time, the current monitoring frequency of nutrients is low, and it is difficult to capture the changes in the process of extreme weather such as sudden typhoons and heavy rains, which has a great impact on the evaluation of nutrient fluxes

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