While the cultivation of paddy in Punjab (and Haryana) does need some curbing, the extreme forebodings of either total groundwater exhaustion in Punjab or of the state turning into a desert of paddy growing is not curbed forthwith are unwarranted.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/groundwater-depletion-punjab
[2] http://admin.indiaenvironmentportal.org.in/category/author/b-d-dhawan
[3] http://admin.indiaenvironmentportal.org.in/category/journal/economic-and-political-weekly
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-irrigation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/punjab
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/haryana
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rice
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wheat
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydrology
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-capability
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drought
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-demand
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rivers
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-recharge