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ارزیابی نقش طرح پخش سیلاب سرچاهان‌ـ هرمزگان در تغذیۀ مصنوعی آب زیرزمینی | ||
| اکوهیدرولوژی | ||
| مقاله 11، دوره 4، شماره 3، مهر 1396، صفحه 749-761 اصل مقاله (923 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2017.62507 | ||
| نویسندگان | ||
| اباذر مصطفائی* 1؛ وحیده مرادنیا2؛ مسعود گودرزی3 | ||
| 1دکتری آب‌شناسی، پژوهشکدۀ حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی | ||
| 2کارشناس ارشد آب زیرزمینی، پژوهشکدۀ حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی | ||
| 3استادیار، پژوهشکدۀ حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی | ||
| چکیده | ||
| اگرچه بیشتر اقلیم کشور ایران خشک و نیمه‌خشک است، سالانه حجم شایان توجهی آب از طریق سیلابها از دسترس خارج میشود. بنابراین، سامانههای پخش سیلاب برای کنترل سیل و مواجهه با کمآبی قریب به سه دهه است که در کشور اجرا میشوند. هدف از این پژوهش، بررسی تأثیر شبکۀ پخش سیلاب منطقۀ سرچاهان استان هرمزگان بر تغذیۀ مصنوعی سفرۀ آب زیرزمینی با استفاده از راهکار حجم کنترلی است. سامانۀ پخش سیلاب یادشده در عرصهای به مساحت 840 هکتار اجرا شده است. پس از بررسی آب‌نمود چاهها، آب‌نگار بارش و حجم سیلابهای واردشده به سیستم، با بررسی نوسانات سطح آب زیرزمینی در چاههای مشاهدهای، تأثیر طرح پخش سیلاب در تغذیۀ مصنوعی سفرۀ آب زیرزمینی بررسی شد. نتایج نشان داد تراز آب زیرزمینی در چاههای مشاهدهای واقع در عرصه، بعد از سیلگیریهای اولیه افزایش نسبی داشتهاند به‌طوری که آب‌نمود چاه مشاهدهای واقع در عرصۀ پخش، افزایش شایان توجهی حدود 34/1 متر را نشان میدهد. همچنین، تغییرات سطح آب زیرزمینی در محدوده حجم کنترل با روند تغذیه/برداشت کاملاً همخوانی دارد و بر همین اساس در سال 1386 سطح آب زیرزمینی به میزان 43/4 متر افزایش داشته است. نتایج بررسیها نشان داد در دشت گهکم-سعادتآباد، بارندگیهای با بیش از 60 میلیمتر یا بارشهای متوالی با مقادیر زیاد، به تغذیه در عرصۀ پخش سیلاب منجر میشوند. در مجموع، نتایج تحقیق نشان داد پروژۀ پخش سیلاب سرچاهان در سالهای بررسی‌شده نتوانسته است در حد انتظار سهم تغذیه را به شکل معناداری افزایش دهد. | ||
| کلیدواژه‌ها | ||
| تغذیۀ مصنوعی؛ حجم کنترل؛ سرچاهان؛ سطح آب زیرزمینی؛ نوسانات | ||
| عنوان مقاله [English] | ||
| Evaluation of the role of Sarcahan-Floodwater spreading in the artificial groundwater recharge | ||
| نویسندگان [English] | ||
| Abazar Mostafaei1؛ Vahideh Moradniya2؛ Masoud Godarzi3 | ||
| 1PhD of Hydrogeology, Soil Conservation and Watershed Management Research Institute (SCWMRI), Agricultural Research, Education & Extension Organization (AREEO), Tehran, Iran | ||
| 2MSc., Soil Conservation and Watershed Management Research Institute(SCWMRI), Agricultural Research, Education & Extension Organization (AREEO), Tehran, Iran | ||
| 3Assistant Professor, Soil Conservation and Watershed Management Research Institute (SCWMRI), Agricultural Research, Education & Extension Organization (AREEO), Tehran, Iran | ||
| چکیده [English] | ||
| Despite the arid and semi-arid climate of Iran, a considerable volume of water becomes out of reach by annual flash flood events. Therefore, in order to solve the problem, Floodwater Spreading Systems have been implemented approximately over the past three decades. The aim of this study was to evaluate quantitative changes of the groundwater affected by the Sarcahan floodwater spreading which was implemented in Hormozgarn Province using Control Volume technique. Sarcahan floodwater spreading project has been implemented in an area of 2000 hectares. The well-hydrographs, rainfall histographs, and the fluctuation of groundwater at observation wells synchronizing with the frequency of flooding were used to evaluate the effect of the project on the groundwater. Examined observation wells showed a relative increase in the level of groundwater after the primarily flood controlling; in other words, the hydrograph of observation well located in the area of flooding has considerably increased by about 1.34 meters. Groundwater levels changes recorded at the observation wells are quite similar to the feeding/withdrawing ratio whereas in 2008 groundwater level increased by about 4.43 meters. Furthermore, in the Gahkom-Saadatabad the amount of rain more than 60 mm or continuous rainfall in large quantities can artificially recharge the aquifer. The results indicated that the Sarcahan project has not satisfactory effect on the groundwater according to predictions. | ||
| کلیدواژه‌ها [English] | ||
| Groundwater level, Artificial recharge, control volume, fluctuation, Sarcahan | ||
| مراجع | ||
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