WELL DRAWDOWN UNCONFINED AQUIFER SKIN

WELL DRAWDOWN UNCONFINED AQUIFER SKIN

✓ allowance for storage capacity of the pumping well, skin effect and storage capacity of the observation well (see Moench’s solution accounting for pumping well storage capacity) is made.Ĭonceptual hydrogeological schemes (cross-sections) of unconfined anisotropic aquifer of infinite lateral extent.Ī – partially penetrating pumping well and piezometer b – partially penetrating pumping and observation wells c – fully penetrating pumping well and piezometer d – fully penetrating pumping and observation wells e – fully penetrating pumping and observation wells in the unconfined leaky aquifer f – confined-unconfined aquifer.ġ) Neuman’s solution for average drawdown in observation well and drawdown in piezometer in anisotropic aquifer pumping well as well as penetrating well may be fully penetrating or partially penetrating Ģ) Boulton’s solutions for average drawdown and water table drawdown in fully penetrating well in isotropic aquifer ģ) Moench’s solution for average drawdown in observation well and drawdown in piezometer in anisotropic aquifer pumping and observation wells being fully penetrating or partially penetrating Ĥ) Moench’s solution for average drawdown in observation well and drawdown in piezometer in anisotropic aquifer pumping and penetrating wells being fully penetrating or partially penetrating allowance is made for pumping well and piezometer storage capacity, skin effect in the pumping well and shape factor of the piezometer ĥ) Moench’s solution for drawdown in fully penetrating or partially penetrating pumping well in anisotropic aquifer with account for pumping well storage capacity and skin effect Ħ) Theis’s solution for water table drawdown for fully penetrating well in isotropic aquifer ħ) Hantush’s solution for water table drawdown for fully penetrating well in isotropic leaky aquifer Ĩ) Moench – Prickett solution for confined-unconfined aquifer. ✓ drawdown can be estimated in the observation well (fully penetrating or partially penetrating) or in the piezometer at any distance from the pumping well ✓ pumping well may be fully penetrating or partially penetrating ✓ aquifer is unconfined, of infinite lateral extent, isotropic or anisotropic on the vertical plane

Well drawdown unconfined aquifer