Deterministic modelling of al-Madinah al-Munawarah groundwater quality using lumped parameter approach

الملخص EN

Groundwaier sampling and analysis of 105 wells in the Al-Madinah Al-Munawarah region.

Saudi Arabia was carried oul using the "lumped parameter" approach.

Regression equations are developed for electrical conductivity versus other ions, Na* +K+ versus other ions, electrical conductivity versus distance (km) from upslream and SO^ /Cl ratio versus distance from upstream.

The equations developed arc easy to use in determining the groundwater quality of upstream or downstream wells from a known electrical conductivity value at a specific well, The present groundwater quality is mostly sulfates and chlorides of calcium and magnesium.

and is suitable for domestic use.

The analysis indicates that the ratio of SO., /Cl decreases with the distance from upstream and electrical conductivity increases with the distance from upstream.

The relationship of numberof tributaries and hydraulic gradient with the distance from upstream was poor.