Modelling water levels of northwestern India in response to improved irrigation use efficiency.

Abstract:

:The groundwater crisis in northwestern India is the result of over-exploitation of groundwater resources for irrigation. The Government of India has targeted a 20 percent improvement in irrigation groundwater use efficiency. In this perspective, and using a regional-scale calibrated and validated three-dimensional groundwater flow model, this article provides the first forecasts of water levels in the study area up to the year 2028, both with and without this improvement in use efficiency. Future water levels without any mitigation efforts are anticipated to decline by up to 2.8 m/year in some areas. A simulation with a 20 percent reduction in groundwater abstraction shows spatially varied aquifer responses. Tangible results are visible in a decade, and the water-level decline rates decrease by 36-67 percent in over-exploited areas. Although increasing irrigation use efficiency provides tangible benefits, an integrated approach to agricultural water management practice that incorporates use efficiency along with other measures like water-efficient cropping patterns and rainwater harvesting may yield better results in a shorter period.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Shekhar S,Kumar S,Densmore AL,van Dijk WM,Sinha R,Kumar M,Joshi SK,Rai SP,Kumar D

doi

10.1038/s41598-020-70416-0

subject

Has Abstract

pub_date

2020-08-10 00:00:00

pages

13452

issue

1

issn

2045-2322

pii

10.1038/s41598-020-70416-0

journal_volume

10

pub_type

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