RESUMO
Enforcement of rules to increase farmers' involvement in participatory irrigation management (PIM) has been ineffective given the non-exclusivity nature of surface irrigation. In this study, we investigated the interrelationship of the social capital's role in higher participation in PIM and the effects towards farmers' efficiency using the case of rice farmers in Northern Thailand. We found that higher intention to participate in PIM collective activities is largely driven by the water user's social capital endowments. Farmers' efficiency level is positively associated with PIM participation and the condition of the collective irrigation management. Our findings suggest the importance of complementing current government efforts with policy interventions focusing on strengthening water user groups' social capital, such as improving group cohesion and their capacity for networking in compensating for various impediments faced by farmers.
