Abstract: The concept of refined dynamic water level, which is referred to the dynamic well water level under the condition of a small constant flow, has been proposed as a new method for the comprehensive observation of the water level and hydrochemistry. Both the theoretical and experimental results have shown that there is a constant water level difference between the refined dynamic water level and the static one in the same well. Based on these results, the static water level can be obtained by correction of the observed refined dynamic water level. Therefore, the " constant flow " sing le-well comprehensive observation method can be established for the refined dynamic water level and traditional hydrochemical observation, and the single-well comprehensive observation of the static water level and the traditionalhy drochemistry can thus be achieved.

Key words: Ground-water precursor, Single-well comprehensive observation, refined dynamic water level