Evaluation of groundwater quality (Cases study; marvdashtand Arsenjan,Fars province,Iran)

Groundwater quality is an important water resource for irrigation,and agriculture needs. in this paper,fuzzy method (fuzzy set as a class of objects with a continuum of grades of membership) and ahp method (for weighting to each of the layers) were evaluated for groundwater quality classifications. in this paper,a fuzzy rule-based system is reported to assess the quality of water for portability based upon the concentration of salts. the gis-based groundwater quality classification needs different parameters maps as inputs,such as ca,cl,ph,mg,so4 and th. in this research was used groundwater quality data from about 100 bore wells collected between 1970 and 2007. the results showed that the fuzzy method classified the region into 4 classes (low,moderate,high and very high). generally,about 47% of the studied area is classified as moderate,40 is classified as high and 13 % of that had low. so application of the fuzzy method is a promising way to determine groundwater quality © university of mohammed premier oujda morocco.