183 / 2024-02-27 09:45:12

Sudden occurrence of hypoxic blackwater events in reservoirs with Eucalyptus plantations

Thermal stratification,model,Meteorological and hydrological factor,blackwater,reservoir

The ecological environmental issue of Eucalyptus plantations is a key scientific topic with global concern, especially deforestation and water safety problems. The physical characteristics of blackwater in Eucalyptus forest reservoirs and the effects on water quality of drinking water resources have yet to be identified thoroughly. Meanwhile, the driving mechanism of sudden blackening in reservoirs and the generation and dissipation process of hypoxic blackwater events are still unknown. They have become key technical problems expected to be solved urgently in the regulation and control of water quality. Therefore, to distinguish the characterization and causes of sudden blackening, ascertain the long-term generation and dissipation process of hypoxic blackwater events and clarify short-term blackening under the drive of meteorology and hydrology in the reservoir, field observation in situ, laboratory experiments and mathematical model are combined in this research. Meanwhile, the transport mechanism of temperature, dissolved oxygen, and dissolved organic matter in a multi-interface such as atmosphere and water interface, water and sediment interface, oxidation and reduction interface will be investigated. A multi-factor coupling simulation technology coupling meteorological, hydrology and sediment transport is expected to reenact and calculate the evolution of generation, accumulation, trigger, and dissipation of blackwater. In addition, the ways and consequences of the Eucalyptus Plantation effects on reservoir blackening will be evaluated, and optimal adaptive regulation measures are proposed to protect the water quality of reservoirs with sudden blackening problems. The projected findings of this study are significant technical recommendations for the scientific cultivation of Eucalyptus plantations and the protection of drinking water safety.