Multi‑scale characteristics of drought propagation from meteorological to hydrological phases: variability and impact in the Upper Mekong Delta, Vietnam

In Natural Hazards
Peer-reviewed Article
cover image

The Vietnamese Mekong Delta (VMD) is highly vulnerable to drought, particularly in the
context of climate change. Prolonged drought during the dry season has emerged as a significant
natural disaster, severely affecting agriculture and socioeconomic development
in the region. To enhance water resource management and agricultural productivity, this
study examines the characteristics of meteorological droughts using the Standardized Precipitation
Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI)
in the upper Mekong Delta of Vietnam. The Mann–Kendall (MK) test and Sen’s slope
were employed to assess trends in drought and hydrological conditions. The results reveal
no significant trends in rainfall, while average temperatures have increased significantly
in most months, especially during the dry season. Although water levels and discharge at
the Tan Chau and Chau Doc stations have decreased, significant reductions were primarily
observed at Chau Doc station from 2000 to 2021. These findings provide critical insights
for sustainable water resource management and planning in the VMD, considering future
climate variability and changes in hydrological regimes.

Author:
H. V. T.
Minh
N. K.
Downes
N. V.
Toan
Gowhar
Meraj
P. C.
Nguyen
K. N.
Le
T. V.
Ty
K.
Lavane
R.
Avtar
M.
Almazroui
Date:
Topic: