Successful IWRM requires the integration of environmental, social
and economic factors; but in any specific situation the relationships
between biophysical and socio-economic systems are even less well
understood than the biophysical alone. Consequently, the social
implications of management decisions are often impossible to predict.
Despite the wide-spread recognition that water should be treated
as an economic good, in many places water is provided to the agricultural
sector at very subsidised rates.
Very often farmers, like other groups, are unwilling to change practices,
if they believe that others will simply continue doing what they
have always done.