MODIFICATION OF THE PALMER DROUGHT SEVERITY INDEX (PDSI) BASED ON ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) IN KARKHEH RIVER BASIN

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HEJABI S.; IRANNEJAD P.; BAZRAFSHAN J.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:3 Page(s): 204-219

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Title

MODIFICATION OF THE PALMER DROUGHT SEVERITY INDEX (PDSI) BASED ON ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) IN KARKHEH RIVER BASIN

Author(s)

HEJABI S. | IRANNEJAD P. | BAZRAFSHAN J. | Issue Writer Certificate

Keywords

PALMER DROUGHT SEVERITY INDEXQ1

WATER-ENERGY BALANCE MODELQ1

ATMOSPHERE-LAND SURFACE INTERACTION SCHEMEQ1

KARKHEH RIVER BASINQ1

Abstract

In this study, the water balance component of the PALMER DROUGHT SEVERITY INDEX (PDSI) was replaced by the ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) and the modified PALMER DROUGHT SEVERITY INDEX (AL-PDSI) was compared with the self-calibrating version of PALMER DROUGHT SEVERITY INDEX (SC-PDSI). The evaluation of drought indices in KARKHEH RIVER BASIN for the period of 1983-2011 revealed more severe droughts reported for certain duration by the AL-PDSI in comparison with the SC-PDSI. The AL-PDSI could capture seasonal variations in relative frequency of droughts. Moreover, the relative frequency of mild, moderate, and severe droughts for the AL-PDSI were higher compared to SC-PDSI. However, the AL-PDSI and SC-PDSI did not show a remarkable difference in terms of the correlation with vegetation and soil moisture variations. The more physical mechanism of AL-PDSI helps in more comprehensive understanding of drought characteristics and in studying the effects of climate and land use change scenarios on droughts.

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APA: Copy

HEJABI, S., IRANNEJAD, P., & BAZRAFSHAN, J.. (2018). MODIFICATION OF THE PALMER DROUGHT SEVERITY INDEX (PDSI) BASED ON ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) IN KARKHEH RIVER BASIN. IRAN-WATER RESOURCES RESEARCH, 14(3 ), 204-219. SID. https://sid.ir/paper/100436/en

Vancouver: Copy

HEJABI S., IRANNEJAD P., BAZRAFSHAN J.. MODIFICATION OF THE PALMER DROUGHT SEVERITY INDEX (PDSI) BASED ON ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) IN KARKHEH RIVER BASIN. IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(3 ):204-219. Available from: https://sid.ir/paper/100436/en

IEEE: Copy

S. HEJABI, P. IRANNEJAD, and J. BAZRAFSHAN, “MODIFICATION OF THE PALMER DROUGHT SEVERITY INDEX (PDSI) BASED ON ATMOSPHERE-LAND SURFACE INTERACTION SCHEME (ALSIS) IN KARKHEH RIVER BASIN,” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 3 , pp. 204–219, 2018, [Online]. Available: https://sid.ir/paper/100436/en

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