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Measures are more sector-, time- and region-specific than strategies, but in all economic sectors they can be grouped in five types (see Box 4.6). Shifting sectorial water management towards a more sustainable paradigm entails a series of challenges, because of the trade-offs between making a sector less water intensive and keeping up its production levels. The broad challenge, similar for all types of water use, is to link water resources, resource efficiency and ecosystem conditions (thus, addressing the need for ecosystem-based management) in an integrated water resource management approach or a nexus approach. As a general rule, more sustainable water management will need to rely more on water demand management, supply from alternative water resources, circular and nature-based solutions.