1. International Water Management Institute, Global Research Division, PO Box 2075, Colombo, Sri Lanka, (E-mail: a.mobin@cgiar.org; h.turral@cgiar.org)
2. International Water Management Institute, Regional Office for South Asia c/o ICRISAT, Patancheru, AP 502 324, India, (E-mail: t.biggs@cgiar.org; c.scott@cgiar.org)