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We have developed generic and replicable tools to assess hydrological, carbon, biodiversity and hydrological functions of a landscape. The Rapid Hydrological Appraisal (RHA) identifies and reconciles local, public/policymakers and scientist perspectives on hydrological issues in a landscape. Using a parsimonious hydrological model we can assess the current hydrological situation and prospect impact of possible land cover change on hydrological function. The Rapid Carbon Stocks Appraisal (RACSA) assesses landscape ability to store carbon. The tool entails measuring plot-level carbon stocks for forest and tree based systems, and performing land cover/land cover change analysis to produce landscape carbon/carbon loss map. Further integration with land use profitability data and a land change model, we can perform trade-off analysis on carbon versus livelihood for various plausible development pathways. The Quick Biodiversity Survey (QBS) provides an initial estimate of the biodiversity value of a landscape. Using indicator animal groups and plants, the approach surveyed a 1-km long transects in which the layout and frequency of sample points are determined by the animal groups being surveyed. The survey uses local guide who is knowledgeable about local plants and animals. Species identifications are carried out in consultation with experts. The outcome of three appraisal tools can further be used as the basis for PES schemes development. We had applied these tools in various regions in Southeast Asia. The tools potentially can be applied in other regions as well.