TY - JOUR
T1 - Evaluation of drought features in the dakbla watershed, central highlands of Vietnam
AU - Tram, Vo Ngoc Quynh
AU - Somura, Hiroaki
AU - Moroizumi, Toshitsugu
N1 - Funding Information:
The authors are grateful to the MEXT scholarship for providing financial support during the doctoral program of the first author in Japan.
Publisher Copyright:
© The Author(s) 2021.
PY - 2021
Y1 - 2021
N2 - The drought impacts in the Dakbla watershed were assessed based on a combination of hydrological modeling and drought indices. Three drought indices, the Standardized Precipitation Index (SPI), Standardized Soil Moisture Index (SSI), and Streamflow Drought Index (SDI) were utilized to evaluate the drought features of meteo-hydrology and agriculture. The results indicated that these indices are well adapted to the local conditions, especially the 12-month time scale. Evaluations of drought features on the watershed scale could provide more specific information regarding drought risk than regional-scale/district-level assessments, because a watershed is a hydrologically fundamental unit to consider water resources management. Additionally, evaluations of drought impacts using the SSI showed longer and higher trends than those using the SPI and SDI in terms of drought duration and frequency. Considering the spatial distribution of drought frequency, the areas predominated by agricultural land in the target watershed had higher drought risk. Thus, assessment of agricultural droughts along with meteo-hydrological droughts is extremely important to support realistic local drought management strategies by considering water availability, water balance, and soil characteristics, especially in specific agricultural areas.
AB - The drought impacts in the Dakbla watershed were assessed based on a combination of hydrological modeling and drought indices. Three drought indices, the Standardized Precipitation Index (SPI), Standardized Soil Moisture Index (SSI), and Streamflow Drought Index (SDI) were utilized to evaluate the drought features of meteo-hydrology and agriculture. The results indicated that these indices are well adapted to the local conditions, especially the 12-month time scale. Evaluations of drought features on the watershed scale could provide more specific information regarding drought risk than regional-scale/district-level assessments, because a watershed is a hydrologically fundamental unit to consider water resources management. Additionally, evaluations of drought impacts using the SSI showed longer and higher trends than those using the SPI and SDI in terms of drought duration and frequency. Considering the spatial distribution of drought frequency, the areas predominated by agricultural land in the target watershed had higher drought risk. Thus, assessment of agricultural droughts along with meteo-hydrological droughts is extremely important to support realistic local drought management strategies by considering water availability, water balance, and soil characteristics, especially in specific agricultural areas.
KW - Agricultural activities
KW - Drought features
KW - Drought indices
KW - Hydrological modeling
KW - Mountainous region
KW - Watershed scale assessment
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U2 - 10.3178/hrl.15.77
DO - 10.3178/hrl.15.77
M3 - Article
AN - SCOPUS:85115995013
SN - 1882-3416
VL - 15
SP - 77
EP - 83
JO - Hydrological Research Letters
JF - Hydrological Research Letters
IS - 3
ER -
