[1]DAO Rina,BAO Yuhai.Dynamic of the Drought Based on the Ecological Partition in Inner Mongolia During 1980-2015[J].Research of Soil and Water Conservation,2019,26(03):159-165.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 03
Page number:
159-165
Column:
Public date:
2019-04-12
- Title:
-
Dynamic of the Drought Based on the Ecological Partition in Inner Mongolia During 1980-2015
- Author(s):
-
DAO Rina1, BAO Yuhai1,2
-
1. College of Geographical Science, Inner Mongolia Normal University, Hohhot 010022, China;
2. Inner Mongolian Key Laboratory of Remote Sensing and Geographical Information System, Hohhot 010022, China
-
- Keywords:
-
drought; ecological zoning; standardized precipitation index; Inner Mongolia
- CLC:
-
P426.616
- DOI:
-
-
- Abstract:
-
In order to study the spatial and temporal distribution characteristics of drought in Inner Mongolia, Inner Mongolia region is divided into desert ecological zones, grassland ecological partitions and forest ecological zones. Using standardized precipitation index as meteorological drought evaluation factor, the precipitation data of Inner Mongolia from 1980 to 2015 were analyzed. The results showed that:(1) from 1980 to 2015, SPI12 in grassland and forest areas showed a slight decreasing trend, while SPI12 in desert areas of Inner Mongolia showed an increasing trend; (2) the drought intensity in the desert areas was mainly moderate drought and light drought, while it was mainly light drought in the glassland areas; the frequency of non-obvious drought, light drought and moderate drought in forest areas were the same; the drought scope in desert and grassland areas was mainly affected by no obvious drought and regional drought, while the drought scope in forest areas was mainly affected by no obvious drought and regional drought; (3) SPI in all three regions showed a significant increase trend in spring; SPI decreased in all three regions in summer; SPI in desert areas tended to increase in autumn, and the change trend of SPI in grassland areas is not obvious,while SPI in forest areas tended to decrease; in winter, SPI in forest and grassland areas tended to increase, while SPI in desert areas showed no obvious trend; (4) SPI values of most sites in the three regions showed an increasing trend in spring; SPI values at most sites in the three regions showed a decreasing trend in summer; the trend rate of SPI change in Inner Mongolia in autumn was increasing in the west and decreasing in the east; most of the sites with increasing tend of SPI in desert ecosystem area in winter were distributed in the west, and the stations with decreasing trend mostly distributed in the east, there are more sites with increasing trend of SPI in grassland area, and the SPI values of all sites in the forest area had an increasing trend. The results can provide theoretical basis for drought monitoring, early warning, and disaster prevention and reduction in Inner Mongolia.