For technology is reasonably reliable, but its impact on livelihoods is contingent upon maintenance of structures over longer period, which in turn depends on the strength and sustainability of the social capital built in the process of implementation. Technically the key to success is ensuring the appropriateness of the physical works to the hydrological regime. Socially the key of success is ensuring community planning function in a way that ensures a long-term vision of local watershed development prevails over short-term sectional/factional opportunism.