Open AccessApplicability Analysis of Drought Index in Shandong Province
Author(s) -
Shen Zhentao,
Qiang Zhao,
Tian Yao
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/780/7/072046
Subject(s) - index (typography) , environmental science , geography , computer science , world wide web
The frequent occurrence of drought disasters restricts the agricultural development of Shandong Province. To analyze the drought situation in Shandong Province reasonably, the selection of drought index is particularly important. In this paper, the standardized precipitation index SPI, precipitation Z index and precipitation anomaly Pa of each city in the dry years of Shandong Province were calculated, and the drought of Shandong Province was analyzed by ArcGIS software. The applicability of the three drought indices in Shandong Province was compared. The results show that: in November 2010, the SPI index was better reflected in the drought, the Z index did not show the mega-arid area, and the Pa index exaggerated the drought in some cities; in March 2011, the Z-index showed that most cities were Light drought, SPI index reflects better than the Pa index for drought; in August 2014, Pa index monitoring showed that more than half of the cities were light drought, Z index showed that most cities were moderately dry, and the SPI index monitoring results were similar to the actual drought conditions; In October 2015, the Z index showed that more than half of the cities had no drought. The monitoring results of the Pa index for some cities were opposite to the actual ones. The monitoring results of the SPI index were consistent with the actual drought conditions.