TY - JOUR
T1 - Identification of the influencing factors on groundwater drought and depletion in north-western Bangladesh
AU - Mustafa, Syed Md Touhidul
AU - Abdollahi, Khodayar
AU - Verbeiren, Boud
AU - Huysmans, Marijke
N1 - The research presented in this report is linked to the work on the ‘identification of influencing factors of groundwater resources in a drought context’ done within the framework of the GroWaDRISK project (BELSPO SSD programme, project number SD/RI/05A). The authors would like to thank the reviewers and the editor for reviewing our manuscript very carefully and for their constructive comments and suggestions, which significantly improved this work.
PY - 2017/8
Y1 - 2017/8
N2 - Groundwater drought is a specific type of hydrological drought that concerns groundwater bodies. It may have a significant adverse effect on the socio-economic, agricultural, and environmental conditions. Investigating the effect of different climatic and anthropogenic factors on groundwater drought provides essential information for sustainable planning and management of (ground) water resources. The aim of this study is to identify the influencing factors on groundwater drought in north-western Bangladesh, to understand the forcing mechanisms. A multi-step methodology is proposed to achieve this objective. The standardised precipitation index (SPI) and reconnaissance drought index (RDI) have been used to quantify the aggregated deficit between precipitation and the evaporative demand of the atmosphere, i.e. meteorological drought. The influence of land-cover patterns on the groundwater drought has been identified by calculating spatially distributed groundwater recharge as a function of land cover. Groundwater drought is defined by a threshold method. The results show that the evapotranspiration and rainfall deficits are determining meteorological drought, which shows a direct relation with groundwater recharge deficits. Land-cover change has a small effect on groundwater recharge but does not seem to be the main cause of groundwater-level decline (depletion) in the study area. The groundwater depth and groundwater-level deficit (drought) is continuously increasing with little correlation to meteorological drought or recharge anomalies. Overexploitation of groundwater for irrigation seems to be the main cause of groundwater-level decline in the study area. Efficient irrigation management is essential to reduce the growing pressure on groundwater resources and ensure sustainable water management.
AB - Groundwater drought is a specific type of hydrological drought that concerns groundwater bodies. It may have a significant adverse effect on the socio-economic, agricultural, and environmental conditions. Investigating the effect of different climatic and anthropogenic factors on groundwater drought provides essential information for sustainable planning and management of (ground) water resources. The aim of this study is to identify the influencing factors on groundwater drought in north-western Bangladesh, to understand the forcing mechanisms. A multi-step methodology is proposed to achieve this objective. The standardised precipitation index (SPI) and reconnaissance drought index (RDI) have been used to quantify the aggregated deficit between precipitation and the evaporative demand of the atmosphere, i.e. meteorological drought. The influence of land-cover patterns on the groundwater drought has been identified by calculating spatially distributed groundwater recharge as a function of land cover. Groundwater drought is defined by a threshold method. The results show that the evapotranspiration and rainfall deficits are determining meteorological drought, which shows a direct relation with groundwater recharge deficits. Land-cover change has a small effect on groundwater recharge but does not seem to be the main cause of groundwater-level decline (depletion) in the study area. The groundwater depth and groundwater-level deficit (drought) is continuously increasing with little correlation to meteorological drought or recharge anomalies. Overexploitation of groundwater for irrigation seems to be the main cause of groundwater-level decline in the study area. Efficient irrigation management is essential to reduce the growing pressure on groundwater resources and ensure sustainable water management.
KW - Bangladesh
KW - Groundwater depletion
KW - Groundwater drought
KW - Groundwater recharge/water budget
KW - Over-abstraction
UR - http://www.scopus.com/inward/record.url?scp=85013046155&partnerID=8YFLogxK
UR - https://cris.vub.be/en/publications/identification-of-the-influencing-factors-on-groundwater-drought-and-depletion-in-northwestern-bangladesh(f6fe77bf-ebdd-4fde-bf76-20017061c980).html
U2 - 10.1007/s10040-017-1547-7
DO - 10.1007/s10040-017-1547-7
M3 - Article
AN - SCOPUS:85013046155
VL - 25
SP - 1357
EP - 1375
JO - Hydrogeology Journal
JF - Hydrogeology Journal
SN - 1431-2174
IS - 5
ER -