[1]ZHANG Te,LIU Ji,WEI Rong,et al.Response of Vegetation to Meteorological Drought in Upper Huaihe River Basin[J].Research of Soil and Water Conservation,2020,27(02):213-219.
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Response of Vegetation to Meteorological Drought in Upper Huaihe River Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
213-219
Column:
Public date:
2020-03-30
- Title:
- Response of Vegetation to Meteorological Drought in Upper Huaihe River Basin
- CLC:
- P426
- DOI:
- -
- Abstract:
- Huaihe River Basin is one of the major agricultural bases in China. Exploring the response of vegetation to meteorological drought has guide significance for agricultural production and ecological protection in Huaihe River Basin. Based on the Standardized Precipitation Evapotranspiration Index(SPEI)and Vegetation Condition Index(VCI), the spatial-temporal variation characteristics of meteorological drought and vegetation in the area above Wangjiaba in upper Huaihe River Basin from 2000 to 2014 were discussed by liner trend, the responses of vegetation to meteorological drought in interannual and different seasons were also analyzed by annual maximum correlation coefficient(YRmax)and seasonal maximum correlation coefficient(SRmax). The result show that:(1)SPEI of study area presented a non-significant declining trend by the interannual change rate of -0.089/year, and the relatively significant decline area was the north of Huaihe River;(2)VCI of study area showed a significant increasing trend by the interannual change rate of 0.053 a, and the significant decline area concentrated in the vicinity of town;(3)on the interannual scale, there was 78.4% area where VCI was significantly correlated with SPEI, and there was no significant difference in impact and sensitivity of different vegetation to meteorological drought;(4)the area where the vegetation growth was more affected by meteorological drought in spring and winter was relatively larger, VCI and SPEI were significantly correlated in 68.9% and 64.8% of the whole area, these regions distributed in the southwest, south, north and east of the basin, respectively; there were 3 VCI were significantly correlated with SPEI in 31.3% and 15.0% of area in summer and autumn, respectively; in summer, the distribution concentrated in the middle of basin, but it scattered in autumn;(5)in spring and winter, the divergence of SRmax among different vegetation was small; wheat and grass were more sensitive to meteorological drought in spring, but the sensitivities of different types of vegetation were not significant in winter; the SRmax of various vegetation showed some differences in summer and autumn without significant correlation, and vegetation was generally sensitive to meteorological at the scale of less than 4 months. The response characteristics of vegetation to meteorological drought in the upper Huaihe River Basin had large difference in space from 2000 to 2014, these research results can provide theoretical support for formulating policy of agricultural production and ecological protection in the changing environment.
- References:
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Last Update:
2020-02-25