Corrosion and Scaling Assessment of Groundwater in the Resources Bahar Plains, Hamedan

Subject Areas : Article frome a thesis

وحید یزدانی ¹ , حسین بانژاد ² , محسن میرزایی ³

1 - دانشجوی دکترای مهندسی آب
2 - استادیار گروه مهندسی آب
3 - دانشجوی کارشناسی ارشد مهندسی آب

Received: 2016-01-10 Accepted : 2016-01-10 Published : 2009-12-22

Keywords:

Abstract :

The main objective of hydrological studies is to provide water of good quality with strict specifications for drinking, agriculture and industry.Corrosion and scaling are some of the problems affecting the distribution systems. To assess the scaling and corrosion potential of the Bahar Plains groundwater, the Langlier, Raisener and Puchorius criteria were employed of the two deleterious properties of groundwater in the Plain, scaling occupies the first ranking. While scaling takes the second ranking. As for the scaling, qanatwater is of better quality than wellwater; a reason maybe the shortening of the galleries through shortcut tunneling. It was observed that 95.7% of wellwater have the scaling potential according to the Raisner criterium; however, this decreases to 53.2% if the puchorius index of 6 is taken as the upper limit of scaling. Employing the Piper curve as the standard, the following conclusions are reached: 70% of the sample contain calcium bicarbonate, 14% contain sedic bicarbonates 4% contain calcium sulfate, 5% contain magnesium bicarbonate, 4% contain sedic sulfate, and 3% contain calcite chlorite. These results also indicated that the langlier criterium is not suitable for assessing the scaling and corrosion potential of the groundwater. In conduction, Bahar Plain groundwater has a low to medium potential of scaling and potential; however, its scaling potential is higher than that of the corrosion potential. This decreases the cross sectional area in the water distribution system resulting in the head loss