The Water, Climate and Development Programme (PACyD) Pilot initiative in Santa Eulalia Sub basin in Lima, Peru aims to improve water security, livelihoods, food production, and ecosystem conservation, while increasing resilience to climate change. The main expected outputs of the initiative include developing an integrated water resources management plan, investment plan, demonstration projects, capacity building, and a proposal to define and implement mechanisms to protect ecosystem services in the sub-basin. The Global Water Partnership will support techniques to conserve ecosystem services, establish payment for ecosystem services, define and value ecosystem services, and propose payment mechanisms to feed into a bill for payment for ecosystems services.