DOI: 10.5194/hess-20-1085-2016
Scopus记录号: 2-s2.0-84961828646
论文题名: Reviving the Ganges Water Machine: Potential
作者: Amarasinghe U ; A ; , Muthuwatta L ; , Surinaidu L ; , Anand S ; , Kumar Jain S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 3 起始页码: 1085
结束页码: 1101
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Economics
; Floods
; Groundwater
; Groundwater resources
; Irrigation
; Surface water resources
; Surface waters
; Water supply
; Watersheds
; Hydrogeological
; Irrigation water use
; Social constraints
; Subsurface waters
; Supply and demand
; Surface runoffs
; Surface storage
; Surface water and groundwaters
; Water resources
; acceleration
; groundwater resource
; irrigation system
; pumping
; runoff
; surface water
; water demand
; water exchange
; water planning
; Bangladesh
; Ganges Basin
英文摘要: The Ganges River basin faces severe water challenges related to a mismatch between supply and demand. Although the basin has abundant surface water and groundwater resources, the seasonal monsoon causes a mismatch between supply and demand as well as flooding.Water availability and flood potential is high during the 3-4 months (June-September) of the monsoon season. Yet, the highest demands occur during the 8-9 months (October-May) of the non-monsoon period. Addressing this mismatch, which is likely to increase with increasing demand, requires substantial additional storage for both flood reduction and improvements in water supply. Due to hydrogeological, environmental, and social constraints, expansion of surface storage in the Ganges River basin is problematic. A range of interventions that focus more on the use of subsurface storage (SSS), and on the acceleration of surface-subsurface water exchange, has long been known as the GangesWater Machine (GWM). The approach of theGWMfor providing such SSS is through additional pumping and depleting of the groundwater resources prior to the onset of the monsoon season and recharging the SSS through monsoon surface runoff. An important condition for creating such SSS is the degree of unmet water demand. The paper shows that the potential unmet water demand ranging from 59 to 124Bm3 year1 exists under two different irrigation water use scenarios: (i) to increase irrigation in the Rabi (November-March) and hot weather (April- May) seasons in India, and the Aman (July-November) and Boro (December-May) seasons in Bangladesh, to the entire irrigable area, and (ii) to provide irrigation to Rabi and the hot weather season in India and the Aman and Boro seasons in Bangladesh to the entire cropped area. However, the potential for realizing the unmet irrigation demand is high only in 7 sub-basins in the northern and eastern parts, is moderate to low in 11 sub-basins in the middle, and has little or no potential in 4 sub-basins in the western part of the Ganges basin. Overall, a revived GWM plan has the potential to meet 45-84Bm3 year-1 of unmet water demand. © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78891
Appears in Collections: 气候变化事实与影响
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作者单位: International Water Management Institute (IWMI), P.O. Box 2075, Colombo, Sri Lanka; Council for Scientific and Industrial Research-National Geophysical Research Institute (CSIR-NGRI), Hyderabad, India; International Water Management Institute (IWMI), ICRISAT Campus, Patancheru, Telangana, India; National Institute of Hydrology, Roorkee, India
Recommended Citation:
Amarasinghe U,A,, Muthuwatta L,et al. Reviving the Ganges Water Machine: Potential[J]. Hydrology and Earth System Sciences,2016-01-01,20(3)