Evaluation of drought propagations with multiple indices in the Yangtze River basin. (1st September 2022)

• Record Type: Journal Article
• Authors: Um, Myoung-Jin; Kim, Yeonjoo; Jung, Kichul; Lee, Moonyoung; An, Heejin; Min, Inkyung; Kwak, Jaesang; Park, Daeryong
• Is Part Of: Journal of environmental management. Volume 317(2022)
• Publication Date: 2022-09-01
• Subjects: Drought propagation -- Lag times -- Meteorological drought -- Hydrological drought -- Agricultural drought -- Yangtze river basin; AVHRR Advanced Very High Resolution Radiometer -- CLM Community Land Model -- GDBD Global Drainage Basin Database -- GLDAS-2.0 Global Land Data Assimilation System 2.0 -- GPCC-V7 Global Precipitation Climatology Center Version 7 -- GRACE TWS Gravity Recovery and Climate Experiment Twin Satellites -- SPEI Standardized Precipitation Evapotranspiration Index -- SRI Standardized Runoff Index -- SSMI Standardized Soil Moisture Index -- YRB Yantze River Basin; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2022.115494
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: This paper explored the drought propagation phenomenon based on meteorological, hydrological, and agricultural aspects in the Yangtze River basin (YRB), China. To evaluate meteorological, hydrological, and agricultural droughts, this paper used three drought indices, standardized precipitation evapotranspiration index (SPEI), standardized runoff index (SRI), and standardized soil moisture index (SSMI), respectively. The community land model (CLM) in the YRB to generate the monthly evapotranspiration, soil moisture, runoff data, which are required for the estimation of drought index, were applied. Different mean durations (6-and 12-month) were used for drought estimation, and propagations of meteorological to hydrological and meteorological and agricultural droughts were investigated for different durations as SPEI6-SRI6, SPEI6-SSMI6, SPEI12-SRI12, SPEI12-SSMI12. The average drought propagation between 1950 and 2010 presented the highest autocorrelation and correlation with one-month lags in four combinations of drought indices in SPEI6-SRI6, SPEI6-SSMI6, SPEI12-SRI12, and SPEI12-SSMI12. Additionally, this paper estimated the optimal lags of SPEI-SRI and SPEI-SSMI drought propagations using mean 6-and 12-month lag times for six representative drought periods. Therefore, the propagation phenomenon of meteorological to hydrological and to agricultural droughts were confirmed in the YRB. Highlights: SPEI, SRI, and SSMI indices have been applied to the Yangtze River basin (YRB). Propagation analysis of SPEI-SRI and SPEI-SSMI have extended to 1951–2010. Mean 12-month duration shows clearer drought propagation than mean 6-month duration. SPEI-SSMI presents 1–7 months propagation time. SPEI-SRI presents 1–2 months propagation time.