ارزیابی کارکرد شبکه‏ های آبیاری در بالاآمدگی سطح آب‏ زیرزمینی (مطالعۀ موردی: دشت بهبهان)

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی دکتری هیدروژئولوژی، گروه زمین‏ شناسی، دانشکدۀ علوم ‏زمین، دانشگاه شهید چمران، اهواز

2 استاد، گروه زمین‏ شناسی، دانشکدۀ علوم ‏زمین، دانشگاه شهید چمران، اهواز

چکیده

در دشت بهبهان طی چند سال اخیر، به‌دلیل مدیریت نامناسب برداشت از منابع آب‏ سطحی و زیرزمینی، سطح ایستابی بالا آمده است و سبب بروز مشکلاتی همچون پدیدۀ آب‌گرفتگی در منطقۀ شهری شده است. از جمله عوامل تأثیرگذار در وقوع این پدیده، توسعۀ شبکه‏های آبیاری و زهکشی در سطح گسترده‏ای از منطقۀ مطالعه‌شده است. برای ارزیابی این موضوع، از آمار درازمدت (سال‏های آبی 1382‌ـ 1383 تا 1394‌ـ 1395) سطح آب ‏زیرزمینی چاه‏های مشاهده‏ای و میزان آب ورودی به شبکه‏های آبیاری موجود در منطقه استفاده شد. با استفاده از این داده‏ها، هیدروگراف‏ معرف، نقشه‏های هم‌عمق، هم‌تراز و نقشه‏های افت و خیز دشت بهبهان در قسمت‏های مختلف آن بررسی شدند. نتایج نشان داد نوسانات سطح آب‏ زیرزمینی دشت بهبهان و ذخیرۀ آن به آب ورودی از شبکه‏های آبیاری بستگی دارد و از میان شبکه‏های آبیاری منطقۀ مطالعه‌شده، شبکۀ ‏بنه‏باشت در مقایسه با شبکه‏های‏ آبیاری مارون جنوبی و شمالی کارکرد مؤثرتری را در تغذیۀ آبخوان دشت بهبهان و بالاآمدگی سطح آب ‏زیرزمینی آن دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of irrigation networks in rising of groundwater levels, Behbahan plain case study

نویسندگان [English]

  • Hassan Daneshian 1
  • Nasrallah Kalantari 2
1 PhD candidate Hydrogeology, Department of Geology, Faculty of Earth Sciences, Shahid Chamran University, Ahvaz, Iran
2 Faculty of earth sciences, Shahid Chamran University, Ahvaz,Iran
چکیده [English]

In the past few years, due to inappropriate management of surface and groundwater resource exploitation in the Behbahan plain, the water table has risen and caused to some problems such as the phenomenon of flooding in the urban area. Development of irrigation and drainage networks in a wide zone of the study area is one of the most effective factors causing this phenomenon is. In order to evaluate this, the water level of the observation wells as well as the amount of input water to irrigation networks were investigated in a long-term hydrological period (since 2003-2004 to 2015-2016) in the region. Using these data, the representative hydrograph, the iso-depth contour, iso-piez contour, and fluctuation maps of Behbahan plain were investigated in different parts of it. The results showed that the fluctuations in groundwater level of Behbahan aquifer and its storage depend on the input water from the irrigation networks in the study area. Among the irrigation networks, Boneh-basht irrigation network has more effective role in feeding of Behbahan aquifer and rising groundwater level in comparison with the northern and southern Maroon irrigation networks.

کلیدواژه‌ها [English]

  • Behbahan plain
  • Irrigation networks
  • Rising of groundwater level
  • Flooding
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