بررسي نفوذ آب شور در آبخوان شهر ساري

Investigation of Salt Water Intrusion into Sari Aquifer

The data is concerned to the two sampling periods in Azar 1382 (December, 2003) and Farvardin 1383(April, 2004) is used to analyze the quantity and quality of Sari city aquifer and to prove the intrusion of salt water of sea and fossil water. In according to correlation matrix between the master ions of groundwater in both cases, the most unity respectively is between the CI and Na at measure of 99.9% and 97.2% in Farvardin respectively. The drawn cluster plots shows the dominance of Ca-Na-HCo3-Cl type in the both cases, as there is a similarity between ions of Na- CI and Ca-HC03 more 80% and 90%. By considering to the current research and to be sure assurance of intrusion of salt water or fossil water, both method of Revelle and composite plots were used. The most proportion of CI ions the basis of Revelle method on the sum of bicarbonate to carbonate refers to the wells number 6 and 7 respectively 0.806 and 0.553, in Azar 0.713 and in Farvardin 0.507, and the lowest quantity in both cases refer to the well No.3, which are called Tangeh Lateh in south of Sari, by 0.806 measure. The drawn composite plots of master ions represent the linear procedure between Na and CI, which are the rest of ions follow the occasional procedure. It shows that the mixture of salt water (containing Na and CI ions) and soft water happens with different proportions.