نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، گروه آبخیزداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه گنبد کاووس، گنبدکاووس، ایران

2 دانش آموخته کارشناسی ارشد گروه آبخیزداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه گنبد کاووس، گنبدکاووس، ایران

چکیده

پژوهش حاضر به‌منظور ارزیابی و مقایسه کیفیت منابع آب زیرزمینی (چشمه و چاه) بخش شرقی دشت گرگان از نظر قابلیت شرب و آبیاری در یک دوره 10 ساله انجام شد. در این تحقیق از نتایج آنالیز شیمیایی 14 چاه و 8 چشمه استفاده ‌شد. از شاخص کیفیت آب (WQI)، دیاگرام شولر و برخی معیارها و استاندارها برای ارزیابی کیفی منابع آب شرب استفاده ‌شد. در بخش آبیاری از هدایت الکتریکی، نسبت خوردگی، نسبت منیزیم، نسبت جذب سدیم، درصد سدیم محلول، نسبت نفوذپذیری و نسبت کلی استفاده شد. سپس پهنه‌بندی برخی از پارامترها و شاخص‌های موثر در هر بخش در محیط GIS و با استفاده از روش IDW انجام شد. براساس میزان شاخصWQI ، کیفیت تمامی چشمه‌ها و چاه‌های حاشیه ارتفاعات در رده عالی قرار می‌گیرد اما با دور شدن از دشت کیفیت برخی از چاه‌ها از خوب تا ضعیف‌ متغیر است. براساس غلظت برخی از پارامترهای هیدروشیمیایی، استانداردها و دیاگرام شولر به جز یک چاه مابقی منابع آب مورد مطالعه از کیفیت مناسبی برای شرب برخوردار هستند. در بخش آبیاری، براساس دیاگرام ویلکوکس، نسبت جذب سدیم، خطر شوری، شاخص کربنات سدیم باقی‌مانده و نسبت کلی، آب چاه‌های غرب منطقه می‌بایست با احتیاط استفاده شود. به‌طورکلی کیفیت آب چشمه‌ها در هر دو بخش شرب و آبیاری به‌مراتب بهتر از آب چاه‌ها می‌باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Assessment and comparison of the spring and well water resources quality for Drinking and Irrigation Purposes (Case study: East of Gorgan plain

نویسندگان [English]

  • Mojtaba Gharemahmoodlu 1
  • javad Shirzadnia 2

1 Associate Professor, Department of Watershed Management, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

2 Master Degree in Watershed Management Department, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

چکیده [English]

The present study was conducted in order to evaluate and compare the quality of underground water resources (springs and wells) in the eastern part of Gorgan Plain in terms of potability and irrigation in a 10-year period. In this research, the results of chemical analysis of 14 wells and 8 springs were used. Water quality index (WQI), Schuler's diagram and some criteria and standards were used to evaluate the quality of drinking water sources. Electrical conductivity, corrosion ratio, magnesium ratio, sodium absorption ratio, soluble sodium percentage, permeability ratio and overall ratio were used in the irrigation section. Then, the zoning of some effective parameters and indicators in each section was done in the GIS environment using the IDW method. Based on the WQI index, the quality of all springs and wells on the edge of the highlands is in the excellent category, but as you move away from the plain, the quality of some wells varies from good to poor. Based on the concentration of some hydrochemical parameters, standards and Schuler's diagram, except for one remaining well, the studied water sources are of suitable quality for drinking. In the irrigation sector, based on the Wilcox diagram, sodium absorption ratio, salinity risk, residual sodium carbonate index and overall ratio, water from wells in the west of the region should be used with caution. In general, the quality of spring water in both drinking and irrigation sectors is much better than well water.

کلیدواژه‌ها [English]

  • Groundwater
  • Schoeller Diagram
  • Corrosion Ratio
  • Wilcox Diagram
  • Water Quality Index
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