Thus, once the isotopic contents of rainwater, soil water, and groundwater are known, it would enable us to understand the rainwater infiltration processes and the depth of groundwater recharge by estimating the movement of isotopic peak along the soil profiles.
We use hundreds of HYDRUS-1D simulations in a sensitivity analysis approach to evaluate the damping depth of transient recharge over a range of periodic boundary conditions and vadose zone geometries and hydraulic parameters that are representative of aquifer systems of the conterminous United States (U.S).
With the advent of radar to detect surfaced submarines, the Germans fitted hundreds of U-boats with snorkels to permit the operation of diesels at periscope depth (to recharge batteries for underwater propulsion) with less of a possibility of detection by Allied radar-equipped ships and aircraft.
This study examines ephemeral channels in the hyper-arid western Sonoran Desert, USA to determine how frequently water recharges the alluvial fill and identify variables that affect the depth and persistence of recharge.
The implications are that relatively simple, homogeneous models of the vadose zone may provide reasonable estimates of the damping depth of climate-varying transient recharge in some complex, layered vadose zone profiles.
Based on sediment sampling in deep vadose zone (with a maximum depth of 11.0 m), groundwater recharge, seepage velocity, solute inventory and transport under four typical irrigated agricultural land-use types (winter wheat and summer maize, WM; pear orchards, PO; outdoor vegetables, VE; and cotton, CO) were investigated in this study.
Effective recharge, the depth of investigation, the texture and the internal architecture of the different sediment types and temperature variation are the main factors influencing the resistivity seasonal variation.
Soils effectively damped seasonal variations of recharge 18O composition after depths of 1.62 2.85 m.
Depth-dependent specific yields were determined for estimation of recharge and ETg.
The variation in water input (precipitation and irrigation) was the main reason for the variation in annual recharge at the depth of 2 m.
