Characteristics of Agricultural and Meteorological Drought in Guizhou Province and Their Response Relationship

YOU Man; HE Zhonghua; ZHANG Lang; YANG Mingke; PI Guining

doi:10.13870/j.cnki.stbcxb.2022.05.032

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Characteristics of Agricultural and Meteorological Drought in Guizhou Province and Their Response Relationship

Updated：2025-03-12

- Characteristics of Agricultural and Meteorological Drought in Guizhou Province and Their Response Relationship
- Vol. 36, Issue 5, Pages: 255-264(2022)
- Affiliations：
  
  1. Shcool of Geographic and Environmental Sciences. Guizhou Normal University,Guiyang,550001
  2. National Karst Rocky Desertification Prevention Engineering Technology Research Center. Guizhou Normal University,Guiyang,550001
  3. Guizhou Key Laboratory of Remote Sensing Application of Mountain Resources and Environment,Guiyang,550001
- Author bio：
- Funds：
- DOI：10.13870/j.cnki.stbcxb.2022.05.032
  CLC： P429
- Published：2022
- Accepted：
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YOU Man, HE Zhonghua, ZHANG Lang, et al. Characteristics of Agricultural and Meteorological Drought in Guizhou Province and Their Response Relationship[J]. 2022, 36(5): 255-264.
DOI：

YOU Man, HE Zhonghua, ZHANG Lang, et al. Characteristics of Agricultural and Meteorological Drought in Guizhou Province and Their Response Relationship[J]. 2022, 36(5): 255-264. DOI： 10.13870/j.cnki.stbcxb.2022.05.032.

摘要

利用贵州省1980-2020年逐月降水与土壤水分计算标准化降水指数(SPI)和标准化土壤水分指数(SSI)

基于游程理论、传播响应率(Rr)、状态转移概率矩阵等方法探究气象与农业干旱特征变化

以及两者之间的响应关系。结果表明:(1)贵州省农业干旱较气象干旱持续时间长、烈度大

干旱历时空间变化较气象干旱显著

干旱烈度则较单一。(2)季尺度上

春季农业干旱对气象干旱响应最为敏感

夏、秋季次之

冬季较弱;不同地貌类型下

春、冬季在半喀斯特低中山响应程度较高

夏季在峰丛谷地

秋季在非喀斯特地区;不同切割深度下

地表切割

越深春季Rr越高

夏、秋和冬季Rr则越低。(3)在20世纪80s转至21世纪10s状态间

不同地貌类型下均发生不同程度的概率转移

其中春、冬季节转移活跃、概率较低

夏、秋季主要呈"低转高"现象

夏季转移概率偏低

秋季转移概率普遍偏高;在不同切割深度下

各季节浅切割与最深切割深度转移活跃度低

概率高

其他切割深度下转移活跃

但概率低。

Abstract

The standardized precipitation index (SPI) and standardized soil moisture index (SSI) were used to calculate monthly precipitation and soil moisture in Guizhou Province from 1980 to 2020. Based on the run-length theory

transmission response rate (Rr) and state transition probability matrix

the changes of agricultural and meteorological drought characteristics and their response relationship were investigated. The results showed that: (1) The duration and intensity of agricultural drought in Guizhou Province were longer than that of meteorological drought

and the spatial variation of drought duration was more significant than that of meteorological drought

but the intensity of drought was single. (2) At the seasonal scale

the response of agricultural drought to meteorological drought was most sensitive in spring

followed by summer and autumn

and weak in winter. Under different geomorphic types

the response degree was higher in semi-karst low mountain in spring and winter

in peak cluster valley in summer

and in non-karst area in autumn. Under different cutting depths

Rr was higher with the deeper surface cutting in spring and autumn. The opposite was true in summer and winter. (3) During 1980s—2010s

different geomorphic types had different degrees of probability transition

in which the seasonal transition was active and low in spring and winter

and the transition was mainly "low to high" in summer and autumn. The transition probability was low in summer and high in autumn. At different cutting depths

the shallow cutting depth and the deepest cutting depth had low transfer activity and high probability in each season

while the other cutting depths had active transfer but low probability.

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