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            YOURNWRMGLOSSARY
          
        
        
          Youwill findbelow thedefinitionsof key termsused in theguide. If youare looking
        
        
          for additional definitions related to NWRM or similar measures, you might find
        
        
          them in the glossary of theNWRM knowledge base at
        
        
        
          
            Term
          
        
        
          
            Definition
          
        
        
          Avoided costs
        
        
          (or costs avoided)
        
        
          Equivalent to an indirect benefit: financial outlays, negative impacts or
        
        
          welfare losses on anyonewhich are avoided by choosing one specific
        
        
          course of action among different alternatives.
        
        
          Some natural water retentionmeasures (NWRM) may protect rivers and
        
        
          freshwater sources thus reducing other protection costs, increasing rivers’
        
        
          natural assimilation capacity andmaking other qualitymeasures redundant.
        
        
          For example,mulching and other NRWMmay reduce erosion and extend
        
        
          the lifespan of reservoirs while reducing their maintenance costs etc.These
        
        
          benefits are context-based (and potentially site-specific) and therefore
        
        
          often difficult to identify and quantify.Valuation alternatives range from the
        
        
          estimation of production losses to the cost of defensive and replacement
        
        
          measures (i.e. averting behaviour).
        
        
          CommonAgriculture
        
        
          Policy (CAP)
        
        
          TheCommonAgriculture Policy is the set of legislation and practices
        
        
          adopted by the EuropeanUnion to provide a common, unified policy on
        
        
          agriculture. 
        
        
        
        
        
          Common
        
        
          Implementation
        
        
          Strategy (CIS)
        
        
          TheCommon Implementation Strategy (CIS) is the strategy developed
        
        
          by the EuropeanCommission and EUMember States (MS) to support
        
        
          the implementation of the EUWFD. It builds on thework of different
        
        
          expert working groups under the steering of theWater Directors of EU
        
        
          MS.Today, it also addresses wider EUwater policy challenges, including the
        
        
          implementation of the Floods Directive;
        
        
          (see
        
        
        
        
        
          .
        
        
          (water) catchment
        
        
          Awater catchment (sometimes referred to as awatershed or drainage
        
        
          basin) is an area of landwhere surfacewater from rain,melting snow, or ice
        
        
          converges to a single point at a lower elevation, usually the exit of the basin,
        
        
          where thewaters join another waterbody, such as a river, lake, reservoir,
        
        
          estuary,wetland, sea, or ocean. 
        
        
        
        
          )
        
        
          Cost-benefitAnalysis
        
        
          (CBA)
        
        
          A framework of analysis based on economic rationality (within a number
        
        
          of constraints onewill always try tomake the decision that increases one’s
        
        
          individual welfare) and founded onwelfare economics.CBA compares
        
        
          costs and benefits of different alternatives and provides rational criteria
        
        
          for decision-making.CBA is a critical input for some decisions but does
        
        
          not replace decisions themselves (i.e. its result is not a binding one).
        
        
          CBA quantifies inmonetary terms and compares the pros and cons of
        
        
          any initiative, including items for which themarket does not provide a
        
        
          satisfactorymeasure of economic value.CBA yields profitability indicators
        
        
          (financial, economic or social) on the basis of information throughout the
        
        
          lifespan of the project. It is to be usedwhen the objectives of different
        
        
          NWRM or Programmes of Measures are not the same, that is to say,when
        
        
          what is at stake is not just a set of alternativemeasures themselves but also
        
        
          different collective aims.