Analysis of salt water intrusion in coastal aquifers

الملخص EN

-Th e position of salt wat er-freshwater int erface in coa stal aquifer s is analyz ed, Governing partial differential equations a re formulated by combining Da rcy's Law and continuity equation and by using Gh ybenHerzberg Principle and Dupuit assumptions .

For the solution of the governing equations Finit e Difference Method is used .

A compute r program based on two-dimensional steady-state math emati cal model is utilized .

As sufficient and reliable field dat a are usuall y not available , the program is tested using two simplified flows for which analytical solutions an: available or obtainable .

namely.

a one-dimensional now in a strip aquifer with two different boundary conditions and an axi-symmetric radi al now in a circular aquifer.

The result s revealed that there is a .good agreement between analytical and numer ical solutio ns, Finall y.

afte r sensitivity an alysis and calibra tion.

the model is applied to the lower valle y of Wadi Ha li on the coas tal plain of Sau di Ar ab ia.

The applicati on is int end ed to be an example of a man agement scheme .

The result s are discussed and some conclusions a rc drawn .

Limitations of the model arise from the assumptions on which it is based .

Th erefore.

the ap plication of the model is limited to steady .

twodim ension al flows in homogeneous and isotropic aquifers in coast al region s.