التقييم الهيدروجيولوجي للمياه الجوفية في منطقة تبوك شمال غربي المملكة العربية السعودية بإستخدام نظم المعلومات الجغرافية و التحليل الإحصائي

الملخص EN

This study aims to assess the hydrogeological changes of groundwater in the east and north of Tabuk regions, which is located in the northwestern part of the Kingdom of Saudia Arabia.

This was elaborated using GIS analyses of DEM and geological maps as well as groundwater data collected.

The ground water variables were statistically analyzed; a Pearson correlation matrix was developed for the variables of groundwater data.

The study showed the geological and structural control of the surface drainage patterns and the distribution of the Saq Formation outcrops in the southwestern part of the study area, as well as the local variations of groundwater levels.

The levels of groundwater are gradually declining as excessive pumping of the aquifer is of limited replenishment under the prevailing arid conditions, and the impact of geological structures on groundwater flow pattern and conductivity.

The results show a high positive correlation between the depth and the water level (r = 0.8), and another high correlation between the depth and the water production (r = 0.8), A negative correlation between the depth and the total dissolved salts (TDS) (-0.5) and between water production and TDS (-0.6) all at (0.01) level of significance.

The Analysis of variance (ANOVA) indicated that significant differences between northern and eastern areas of Tabuk for depth, static water level, and pumping water level, as a result of the geological changes of the Saq aquifer in the eastern and northern areas.

However the water production and pumping rates and the TDS of the water in both areas are correlated.

This indicates that the abstraction of groundwater has not affected conductivity and groundwater flow patterns within the areas.

Although the aggressive pumping of the groundwater has developed significant decline of water levels and the safe yields and sustainability of groundwater has to be examined.