جستجوی مقالات مرتبط با کلیدواژه "دشت قزوین" در نشریات گروه "مهندسی دریا"

Groundwater is the most important source for various uses, including drinking and farming requirements. In Qazvin plain region the existence of these resources such as springs are very important for livelihood and consumption of the region’s population. In this study, fifteen springs were sampled in 2013. The aim of this study was to evaluate water quality of springs in the north region of Qazvin plain for drinking and agricultural purposes. For this purpose, for classification of water quality for drinking water, the Water Quality Index (WQI) method and for agricultural water usages, Wilcox classification, sodium percentage and RSC was used. The results indicated that among springs evaluated, based on the WQI method, about 93 percent of them were categorized in good and excellent range and about 7 percent in poor range. Based on Wilcox classification, about 80 percent of samples were categorized in the range of low salt level suitable for agriculture (C2S1), and 20 percent were categorized as salty and should only be used when necessary(C3S1). The classification based on the percentage of sodium, showed that about 80 percent of the samples examined were in excellent, good and acceptable conditions and 20 percent were in uncertain status. Similarly, according to RSC rankings, about 93 percent had acceptable quality, and 7 percent had poor quality. In general, according to the results of classification of this study area, springs were suitable and favorable for drinking and farming purposes and a few need further monitoring and investigation.

Identifying acceptable drinking water sources depend on the methods which always incorporate the correct and logical choices. One of these methods is combination of Analytical Hierarchy Process (AHP) and Geographic Information System (GIS), which is one of the appropriate assessment tools for groundwater management. The main objective of this study is to evaluate groundwater quality for drinking purposes in Qazvin plain. In order to build the groundwater quality map of this area, water quality parameters of 17 wells including total dissolved solids, hardness, sodium, chloride and sulfate during 2013 was measured. At the first step, the zoning map parameters were drawn by Interpolation method, Inverse Distance Weighted (IDW), then classifications of maps were prepared based on Schoeller method. Afterwards the weights of the parameters were determined with the help of AHP. In the final stage, groundwater quality map of the study area was created by multiplying their combined weights to related zones. The results showed that about 83 percent of the area water quality is good and acceptable and about 17 percent is inappropriate. It could be concluded that most of the water in the study area in the Qazvin plain has good quality while central and eastern parts have more drinkable water sources.

Groundwater has become the most important natural resource in recent years due to lack of rainfall and less surface water. In this Study, the effect of geological and agricultural activities on groundwater resource area in north of Qazvin Plain has been studied. For this research to study the qualitative parameters, 17 wells were sampled in 2013. Initially for estimation of the impact of geology on groundwater samples, water type and saturation index (SI) of various minerals were studied, then the impact of human factors on groundwater resources in the North of Qazvin plain was investigated by using linear regression analysis. Results showed that the amount of dissolved minerals from the west to the east of the study area is on the rise. Ions of sodium, bicarbonate and sulfate are dominant ions, mostly as a result of the dissolution of halite, gypsum and carbonate which entered the groundwater. Linear regression analysis showed that high correlation of nitrate, sulfate, chloride, potassium, and total dissolved solids (TDS) reflects the impact of agricultural activities on groundwater. Nitrate concentration was found to be much higher than WHO 2011 standards (50 ppm) in western (335 ppm) and eastern (103 ppm) parts of study area as a result of agricultural activities.