Evaluation of Constrained Coalition Formation Algorithms for Computer Agriculture Water-User Associations Under Heterogeneous Farm Sizes: An Artificial Intelligence Stability Bound for Participatory Irrigation Governance

Participatory irrigation governance depends on water-user associations whose members hold unequal land endowments, yet the coalition-formation algorithms proposed for computer agriculture typically assume symmetric agents or ignore institutional constraints on coalition size and composition. The analysis is theoretical and methodological: it specifies a cooperative-game representation of water-user associations in which farm size determines both water demand and voting weight, imposes institutional constraints on coalition membership, and derives a bound on the core stability of the resulting coalition structure as a function of the dispersion of farm sizes and the tightness of the constraints. The bound is then used to characterise the conditions under which algorithmic coalition recommendations remain stable against defection by large and small holders.