Geostatistical Analysis of Scaling and Corrosion Potential in the Lordegan Aquifer
Subject Areas : soil pollution
Yaser Ostovari
1
(PhD student ,Department of Soil Science, Faculty of agriculture, University of Shahrekord, Shahrekord Iran)
Habib Beigi-Harchegani
2
(Assistant professor, Department of soil Science, Faculty of Agriculture, University of Shahrekord, Shahrekord
Iran)
Alireza Davoudian
3
(3-Associate professor, Department of Natural Resources and Earth Sciences. University of Shahrekord,
Shahrekord Iran)
Keywords: Langelier index, Ryznar index, Kriging, Mapping,
Abstract :
Introduction: An important aspect of water quality is the potential for scaling and corrosion. Theoccurrence of either of these two phenomena can increase maintenance costs and shorten the lifespanof the water supply and distribution systems as well as impair water hygiene and aesthetics.Materials and methods: The main goals of this study were to evaluate the potential for corrosionand/or scaling of the groundwater of the Lordegan aquifer, and to map relevant indices. For thispurpose, data from 32 wells, five qanats and five springs, all located in the Lordegan plain, were usedto calculate Langelier saturation and Ryznar stability indices. Kriging interpolation method was usedto create maps of the stability indices.Results and Discussion: Based on the Langelier index, 93 percent of samples had low to moderatepotential for scaling and only 7 percent of the samples had high potential for scaling. Based on theRyznar index, 6 percent of samples had less to moderate corrosion potential and 38 percent of thesamples had a high potential for corrosion. In general, due to the presence of carbonatic geologicalformations, the scaling potential of this groundwater is dominant over its corrosion potential. Basedon the Langelier index, 76 percent of the Lordegan aquifer area (i.e. 4500 ha) has low scaling potentialand based on the Ryznar index 84 percent of the Lordegan aquifer area (i.e. 5040 ha) has low tomoderate corrosion potential. Overall, scaling or corrosion in drinking water and drip irrigationsystems does not seem to be a significant problem. These results, however, only pertain to normalwater temperature.
- مختاری ا، عالیقدری م، حضرتی ص، صادقی ه، قراری ن و قربانی ل. 1389. ارزیابی وضعیت خورندگی و رسوب گذاری شبکه توزیع آب آشامیدنی شهر اردبیل با استفاده از شاخصهای Langelier و Ryznar. مجله سلامت و بهداشت اردبیل. دوره اول، شماره اول، تابستان 1389، صفحات 14 تا 23.
- زارعابیانه ح، عبدالصالحی ا و کاظمی آ. 1389. مطالعه خوردگی و رسوبگذاری آب های زیرزمینی دشت همدان – بهار. علوم و تکنولوژی محیط زیست، دوره دوازدهم، شماره دو، تابستان 1389. صفحات 89 تا 101.
- Rafferty. 2000, Scaling in geothermal heat pump systems, Geo- Heat Center Oregon Institute of Technology 3201 Campus Drive Klamath Falls. PP 11-15.
- مظلومی س، ع ا بابایی، فضلزادعدویل، ابوئی ا، ربیعینژاد ا، نوروزی م و حاج پورسوق خ. 1388. پتانسیل خوردگی و رسوب گذاری آب شرب شهر شیراز.
- قضاوتی م، نوشادی م و مرندی ر. 1388. بررسی کیفیت شیمیایی و پتانسیل خوردگی آب های آشامیدنی تولیدی در پالایشگاه بندرعباس و ورودی به آن. دوازدهمین همایش ملی بهداشت محیط ایران، دانشگاه علوم پزشکی شهید بهشتی، دانشکده بهداشت، آبان 1388.
- کریمپور م، نیازی ب و مهرآور ط. 1386. تعیین وضعیت خورندگی شبکه توریع آب آشامیدنی شهر ملایر در تابستان 85. دهمین همایش ملی بهداشت محیط، دانشگاه علوم پزشکی همدان. 8 الی 10 آبان 1386.
- Dehghani M, Tex F and Zamanian Z. 2010. Assessment of potential of scale formation and corrosive of tap water resources and the network distribution system in Shiraz, South Iran. Pakestan Journal of Biological Science 13(2): 88-92.
- Capra A. and Scicolone B.1998. Water quality and distribution uniformity in drip/trikle irrigation systems. Journal of Agricultural Engineering Research, 70. 353-365.
- Sanches F. 2001. Mapping groundwater quality variables using PCA and geostatistics : a case study of Bajo Andarax, southeastern Spain. Hydrological Sciences-Journal-des Sciences Hydrologiques, 46(2) April.
