Randomized trial examines groundwater responses to canal regulation and rainfall in agricultural contexts, suggesting implications for water management.
Key Points
To investigate how groundwater levels respond to canal regulation and extreme rainfall events in the Huaibei Plain.
Analyzed groundwater and surface-water records from 2019 to 2024 in the Chezegou Watershed.
Applied the linearized Boussinesq equation to model groundwater responses using observed data.
Measured groundwater levels at intervals of about five days, focusing on the response to a significant rainfall event.
Groundwater depth at J5 decreased by 1.69 m in 48 hours following canal influences, and J9 rose by 1.79 m over five days.
The response of groundwater levels varied based on distance from the canal and influenced by storm dynamics.
Calculated hydraulic diffusivities ranged from 5.27 × 10³ to 1.05 × 10⁴ m² d⁻¹, indicating the influence of aquifer properties.