Selection of appropriate SPI drought index based on groundwater condition in Yazd - Ardakan plain, Yazd, Iran

Drought phenomenon has significant effects on various aspects, especially in the arid and semiarid regions of Iran like as Yazd province. Drought condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 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 condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 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 condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 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 condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 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 condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 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 condition 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. Hence, different time scales of SPI were applied to check correlation between SPI and 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 appropriate drought index in the study area.