تحديد منسوب المياه الجوفية في مزرعة فدك-محافظة النجف باستخدام تقنية المسح الزلزالي الانكساري السطحي ثنائي البعد

الملخص EN

A seismic refraction survey using 2D tomography technique achieved to determine the groundwater table level in Fadak farm which located in the area site called Sea of Najaf at the province of Najaf.

Strata Visor –NZ seismograph instrument was used to achieve the survey using 24 geophones (P-wave type) spread along a profile of 188 m in length.

The research includes choosing a suitable location to obtain the required reading using (24 channels) seismograph with a geophone interval of 4 m to determine the extension depth of the ground water table level.

This has been achieved by taking multi shots (24 shots) by using a sledge hammer along spread lines.

Reflex W software used to analyze the data and drawing the survey sections of 2D Tomography.

The velocities of the first layer was ranged between (537-794) m/sec and its depth ranged between (0-3.8) m.

The velocity of the second layer was (2747) m/sec and its depth ranged between (3.8-24) m.

The velocity of the third layer was (3186) m/sec and its depths were more than (24) m represents Dammam formation and considered within the groundwater aquifer.