ANALYSIS ON NO-PRECURSORY ANOMALY OF WELL WATER LEVEL IN OVER-EXPLOITED AREA

Based on present situation of over exploited ground water as well as geological environment of each observation well and hydrogeology condition and observation system of well area,the general and individual characters of no-precursory well water level anomaly caused by over exploiting is studied.The results indicate that this kind of no-precursory anomaly is closely related to aquifer conditions;they are neither concentrated in space domain nor clustered in time domain and each has its own distinctive characters.