GROUNDWATER RECHARGE AND WATER-TABLE RISE UNDER EQUILIBRIUM CONDITION

Water table level is an important feature in subterranean hydrology an d is relatively easy to observe. Groundwater recharge is a cause of wa ter table rise and the carrier of contaminants to groundwater. However , groundwater recharge is an elusive quantity because accurate field m easurements are difficult to obtain. A study of the relationship betwe en groundwater recharge and water table rise is advantageous because i t will allow the evaluation of groundwater recharge based on field-mea sured water table rise. The equilibrium condition is defined as a cond ition when the water energy in a region reaches a constant. A publishe d record (Holmes and Colville, 1970) indicated that the water energy n ear a water table approximated the equilibrium condition. An analytica l relationship between groundwater recharge and water table rise is de rived based on the equilibrium condition. The analytical relationship was tested using measured water table levels during two storm events a nd produced promising results. Keywords. Groundwater, Recharge, Water table, Equilibrium condition.