TITLE:
The Effect of Evaporative Formations in Increasing the Salinity of the Water Resources in Mahdasht-Eshtehard Region (Iran)
AUTHORS:
Naser Ebadati, Hoseyn Yousefi
KEYWORDS:
Water Quality, Salinity, Mahdasht, Eshtehard, Hydrogeology
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.4 No.9,
September
1,
2016
ABSTRACT: Considering
the underground water resources salinity problem in Mahdasht to Eshtehard
region of southern Alborz Province, we attempted to deal with the relationship
between the water sources features especially salinity with the geology of the
mentioned range in terms of petrology and structural properties. For this
purpose after determining the study range, field investigation was performed to
identify the geological formations and the distribution thereof as well as the
faults locations using existing geological maps. Using a fourteen year period
statistics (2009-2014), the static water table, the discharge rate, annual exploitation
and the plain’s underground water level elevation (GIS) were analyzed and evaluated. Water
samples were taken from 18 wells and chemical analysis determining the
quality of water was used. The concentration contour maps of chloride, sulfate,
sodium and total soluble solids together with the faults performance analysis
showed that the highest salinity concentration relates to northeastern part of
the plain. Concentration and qualitative results, the regional water quality
can be classified in moderate to disagreeable in terms of potability and saline
for agricultural use. The study findings showed that the high evaporative
masses’ erosion rate and gypsum and saline sediment transport from the
northeast Neogene formations have developed saline field in the plain and
immethodical exploitation of water sources has considerably reduced the water
quality and increased the salinity.