Abstract:
The main portion of water demands of arid regions like Kashan Plain, Iran supply by groundwater wells. This research was conducted to assess the groundwater quality as well as modelling and mapping groundwater quality in the study area using geosatistics and deterministic techniques. Five water quality parameters, including Electrical Conductivity, Sodium Adsorption Ratio, Total Hardness, Total Dissolved Solids and pH, were applied to determine the irrigation and drinking water quality index using the Wilcox diagram and WHO standards. The final map indicated that the groundwater quality increased from north to south of the study area. The areas located in the centre, south and eastern south of the study area had the optimum quality for irrigation and drinking purposes. Furthermore, based on the results of zoning using the Wilcox diagram determined that ground water quality of the study area 22%, 42% and 36% were good, medium and non-suitable, respectively.
Machine summary:
, International Desert Research Center (IDRC), University of Tehran, Tehran 1417763111, Iran Received: 6 February 2019; Received in revised form: 26 June 2019; Accepted: 30 June 2019 Abstract The main portion of water demands of arid regions like Kashan Plain, Iran supply by groundwater wells.
Furthermore, based on the results of zoning using the Wilcox diagram determined that ground water quality of the study area 22%, 42% and 36% were good, medium and non-suitable, respectively.
Introduction The usage of groundwater has gradually increased owing to increase of water demand and shortage of surface water during the growth of population and rapid industrialization, especially in arid and semi-arid regions (Nas, 2009; Belkhiri and SheikhiNarany, 2015; Bodrud-Doza et al.
ir to 15 m water table-level drop (Ahmadi and Sedghamiz 2007; Sadat Noori, 2012), and most of water resources are gradually becoming polluted due to addition of materials from their surroundings (Lokeshwari and Chandrappa, 2006; Prabu et al, 2011) in which many wells are now out of use.
Thus, regarding the Kashan plain water resources condition, the main purpose of the current research was to evaluate geostatistical and deterministic techniques of groundwater quality modelling and calculate water quality indices in the study area.
Spatial distribution map of SAR of Kashan plain Based on the results in Table 7, approximately 22 percent of the groundwater had good quality in the area.
In this research, groundwater quality analysis was conducted on the data received for 72 observation wells in the Kashan plain applying deterministic and geostatistics techniques.