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Improved policy alignment enhances both environmental performance and governance efficiency.
First, alignment strengthens the recognition of the multifunctional character of NSWRM. Retention measures often contribute simultaneously to:
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Runoff regulation and flood mitigation
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Nutrient load reduction
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Sediment control
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Soil moisture stability
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Climate resilience under projected scenarios
When policy frameworks acknowledge these overlapping contributions, measures can be evaluated more holistically rather than within isolated sectoral criteria.
Second, harmonization improves spatial targeting and cost-effectiveness. Optimisation analyses within OPTAIN show that coordinated placement of measures at catchment scale significantly enhances cumulative impact compared to fragmented approaches.
Third, alignment supports greater economic attractiveness and feasibility. Socio-economic assessments indicate that retention measures become more viable when incentive mechanisms reflect measurable environmental benefits and long-term system resilience.
Fourth, harmonized analytical tools enhance comparability across regions. By using consistent modelling protocols and performance indicators, case studies can be assessed under comparable conditions while respecting local variability.
Overall, policy alignment reduces trade-offs, increases transparency and strengthens the capacity of retention strategies to contribute simultaneously to water, agricultural and climate objectives.