یافته‌های نوین زمین‌شناسی کاربردی

یافته‌های نوین زمین‌شناسی کاربردی

تخمین هدایت هیدرولیکی چشمه ­های کارستیکی نهاوند با روش ژئوالکتریک

نویسندگان
1 دانشجوی دکترا، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه بوعلی‌سینا، همدان، ایران
2 دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه بوعلی‌سینا، همدان، ایران
چکیده
هدایت هیدرولیکی یکی از این پارامتر‌های ضروری است. دشت نهاوند واقع در غرب ایران یکی از دشت­های مهم از نظر استفاده شرب و کشاورزی می­باشد که دارای سازندهای آهکی و کارستی است. در این پژوهش، از 5 سونداژ ژئوالکتریکی به­‌منظور بررسی و تخمین مقادیر هدایت هیدرولیکی 5 چشمه کارستیکی دشت نهاوند استان همدان استفاده شد. سونداژها در بالادست هر چشمه اندازه­گیری شد. تفسیر کمی داده­های ژئوالکتریک با استفاده از نرم­افزار IPI2win صورت گرفت. نتایج نهایی نشان داد مقاومت ویژه ظاهری چشمه­های فاماسب، فارسبان، قلعه باروداب، گیان و گنبدکبود به ترتیب معادل 3/82، 9/81، 55/113، 85 و 3/44 اهم متر است. بیشترین مقدار تخلخل با مقدار 55 درصد متعلق به چشمه فارسبان است و چشمه قلعه باروداب با 26 درصد کمترین مقدار تخلخل را دارد. بیشترین مقدار هدایت هیدرولیکی با استفاده از روابط مورد بررسی در چشمه گیان 40/26 متر بر روز و کمترین مقدار در چشمه قلعه باروداب معادل 62/4 متر بر روز تخمین زده شد که با مقدار تخلخل همسو می‌باشد؛ به‌طوری‌که در بین 5 چشمه مورد بررسی کمترین مقدار تخلخل و هدایت هیدرولیکی را چشمه قلعه باروداب دارد. از این نتایج به­منظور مدیریت بهینه منابع آب منطقه می­توان بهره گرفت.
کلیدواژه‌ها

عنوان مقاله English

Estimation of hydraulic conductivity of Nahavand karstic springs using Geoelectric method

نویسندگان English

Rojin Fasihi 1
Abdollah Taheri Tizro 2
1 Ph.D. student of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
2 Assoc. Prof., Dept., of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
چکیده English

Hydraulic conductivity is one of these necessary parameters. Nahavand Plain, located in the west of Iran, is one of the most important plains for drinking and agriculture uses, which has limestone and karst formations. In this research, five Geo-electrical soundings were used to investigate and estimate hydraulic conductivity values of five karstic springs in Nahavand plain of Hamadan province. Soundings were measured upstream of each spring. Quantitative interpretation of Geo-electric data was done using IPI2win software. The final results showed that the apparent resistivity of the springs of Famaseb, Faresban, Ghale Baroodab, Giyan and Gonbadkabood are equivalent to 82.3, 81.9, 113.55, 85, and 44.3 Ohm-meters, respectively. The highest value of hydraulic conductivity was estimated by using the investigated relations in Giyan Spring to be 26.40 m/day and the lowest value of this parameter in Ghale Baroodab Spring was estimated to be 4.62 m/day, which is in line with the porosity value (26.74 percent) which has the lowest porosity and hydraulic conductivity among the five investigated springs. The Geo-electric method is one of the most effective methods in determining and diagnosing subsurface layers. These results can be used for better management of water resources in the region.

کلیدواژه‌ها English

karst
spring
Geoelectric
hydraulic conductivity
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  • تاریخ دریافت 15 مهر 1403
  • تاریخ بازنگری 19 اسفند 1403
  • تاریخ پذیرش 22 اسفند 1403