International Journal of Maritime Technology
International Journal of Maritime Technology
ijmt
Engineering & Technology
http://ijmt.ir
1
admin
2345-6000
2476-5333
10.61186/ijmt
en
jalali
1397
12
1
gregorian
2019
3
1
11
Winter and Spring 2019
online
1
fulltext
en
Transient Behavior of Saltwater Wedge and Mixing Zone in Head-Controlled Coastal Aquifer: Experimental Measurements and Numerical Modeling
مقاله پژوهشي
Research Paper
Saltwater intrusion is a transient process that affects the coastal aquifers quality and hydrodynamics. The transient behavior of the saltwater wedge (SW) and mixing zone (MZ) due to the changes of the inland freshwater head was investigated through experimental and numerical approaches using image processing technique and the numerical code SUTRA. To acquire data in the transient conditions, automated algorithms were designed and employed for both methods. Numerical simulations were extended to a reference problem of field scale for further study of the transient aspect of the saltwater intrusion phenomena. The results demonstrated that the behavior of SW area is significantly similar to the behavior of SW toe length in transient conditions. Also, in the advancing case, the SW height reaches the steady state condition much sooner than the SW toe length and the SW area, while in the receding case, all the three indicators are stabilized almost simultaneously. Furthermore, the results showed that the MZ expanded at early stages of the receding and after a while condensed again gradually until it finally reaches to its original state at the beginning of the advancing case. Although local velocity of brackish water toward sea boundary in the dilute region of the MZ is more than in the dense region, the flushing and mixing process causes to increase the MZ in the receding case. Sensitivity analyzes showed that the speed of SW advancing or receding does not affect the MZ thickness in a steady state condition.
saltwater intrusion, transient condition, saltwater wedge, mixing zone, image processing, numerical modelling
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51
http://ijmt.ir/browse.php?a_code=A-10-990-1&slc_lang=en&sid=1
Abbasali
Rezapour
abbas.rezapoor@birjandut.ac.ir
10031947532846003369
10031947532846003369
Yes
Department of Civil Engineering, Birjand University of Technology
Fazlolah
Saghravani
saghravani@shahroodut.ac.ir
10031947532846003370
10031947532846003370
No
Department of Civil Engineering, Shahrood University of Technology
Alireza
Ahmadyfard
ahmadyfard@shahroodut.ac.ir
10031947532846003371
10031947532846003371
No
Department of Electrical Engineering, Shahrood University of Technology
Mehdi
Rezapour
rezapour@cmu.ac.ir
10031947532846003372
10031947532846003372
No
Department of Civil Engineering, Chabahar Maritime University