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انتخاب شاخص خشکسالي SPI مناسب با تکيه بر وضعيت آب‏هاي زيرزميني در دشت يزد- اردکان
عنوان (انگلیسی): Selection of appropriate SPI drought index based on groundwater condition in Yazd – Ardakan plain, Yazd, Iran
نشریه: پژوهش آب ايران
شماره: پژوهش آب ايران (دوره: ۱۰، شماره: ۲)
نویسنده: نسیمی، علیرضا ، محمدی، ضرغام
کلیدواژه‌ها : شاخص بارش استاندارد (SPI). ، شاخص خشكسالي مناسب ، خشكسالي ، دشت يزد- اردكان
کلیدواژه‌ها (انگلیسی): Standardized Precipitation Index (SPI) , Appropriate drought index , Drought , Yazd – Ardakan plain
چکیده:

پديده خشکسالي اثرات قابل توجهي را در ابعاد مختلف،‏ به ويژه در مناطق خشک و نيمه‌خشک ايران مانند استان يزد دارد. به طور معمول براي ارزيابي وضعيت خشکسالي در مناطق مختلف،‏ از شاخص‏هاي متداول استفاده مي‏شود. اما در اين پژوهش تلاش شده است که شاخصي با کارايي منطقه‏اي براي ارزيابي شدت خشکسالي در دشت يزد- اردکان،‏ انتخاب شود. بنابراين،‏ در اين پژوهش،‏ شاخص خشکسالي SPI مناسب براساس وضعيت آب‏هاي زيرزميني انتخاب شده است. با توجه به اين كه شاخص بارش استاندارد،‏ شاخصي با قابليت انعکاس وضعيت منابع آب تشخيص داده شده است،‏ به بررسي و ارزيابي هماهنگي مقياس‏هاي زماني مختلف شاخص بارش استاندارد با وضعيت آب‏هاي زيرزميني دشت يزد- اردکان با استفاده از هيدروگراف واحد دشت و تغييرات زماني سطح ايستابي در پيزومترها پرداخته شده است. نتايج نشان داد که در منطقه مورد بررسي بهترين هماهنگي بين نوسانات سطح ايستابي و شاخص بارش استاندارد 12 ماهه وجود دارد. از اين‏رو شاخص بارش استاندارد 12 ماهه به عنوان شاخص خشکسالي مناسب دشت يزد- اردکان انتخاب و معرفي شده است.

چکیده (انگلیسی):

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought conditions in an area has been evaluated using conventional indices. This research attempts to select an efficient index with regional applicability. According to related literature, appropriate index has been selected based on the objects and type of study. In this research, SPI has been identified as an appropriate index for study of groundwater condition during drought. Since the SPI was considered as an appropriate index for explaining the water resources condition, different time scales of the SPI were applied to check the correlation between SPI and the fluctuation of the water table in the study area. The results show high correlation between fluctuations of the water table in piezometers with SPI 12-month period. As a result, SPI 12-month is proposed as an appropriate drought index in the study area.

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought conditions in an area has been evaluated using conventional indices. This research attempts to select an efficient index with regional applicability. According to related literature, appropriate index has been selected based on the objects and type of study. In this research, SPI has been identified as an appropriate index for study of groundwater condition during drought. Since the SPI was considered as an appropriate index for explaining the water resources condition, different time scales of the SPI were applied to check the correlation between SPI and the fluctuation of the water table in the study area. The results show high correlation between fluctuations of the water table in piezometers with SPI 12-month period. As a result, SPI 12-month is proposed as an appropriate drought index in the study area.

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought conditions in an area has been evaluated using conventional indices. This research attempts to select an efficient index with regional applicability. According to related literature, appropriate index has been selected based on the objects and type of study. In this research, SPI has been identified as an appropriate index for study of groundwater condition during drought. Since the SPI was considered as an appropriate index for explaining the water resources condition, different time scales of the SPI were applied to check the correlation between SPI and the fluctuation of the water table in the study area. The results show high correlation between fluctuations of the water table in piezometers with SPI 12-month period. As a result, SPI 12-month is proposed as an appropriate drought index in the study area.

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought conditions in an area has been evaluated using conventional indices. This research attempts to select an efficient index with regional applicability. According to related literature, appropriate index has been selected based on the objects and type of study. In this research, SPI has been identified as an appropriate index for study of groundwater condition during drought. Since the SPI was considered as an appropriate index for explaining the water resources condition, different time scales of the SPI were applied to check the correlation between SPI and the fluctuation of the water table in the study area. The results show high correlation between fluctuations of the water table in piezometers with SPI 12-month period. As a result, SPI 12-month is proposed as an appropriate drought index in the study area.

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought conditions in an area has been evaluated using conventional indices. This research attempts to select an efficient index with regional applicability. According to related literature, appropriate index has been selected based on the objects and type of study. In this research, SPI has been identified as an appropriate index for study of groundwater condition during drought. Since the SPI was considered as an appropriate index for explaining the water resources condition, different time scales of the SPI were applied to check the correlation between SPI and the fluctuation of the water table in the study area. The results show high correlation between fluctuations of the water table in piezometers with SPI 12-month period. As a result, SPI 12-month is proposed as an appropriate drought index in the study area.

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صاحب امتیاز:
دانشگاه شهرکرد
مدیر مسئول:
دکتر حسين صمدی
سردبیر:
دکتر منوچهر حيدرپور
مدیر داخلی:
دکتر محمدعلی نصراصفهانی