{"id":4406810,"date":"2026-06-04T08:15:43","date_gmt":"2026-06-04T08:15:43","guid":{"rendered":"https:\/\/retouch-nexus.eu\/?p=4406810"},"modified":"2026-06-04T08:38:03","modified_gmt":"2026-06-04T08:38:03","slug":"new-policy-brief-collective-scalable-strategies-for-non-conventional-water-resources","status":"publish","type":"post","link":"https:\/\/retouch-nexus.eu\/fr\/2026\/06\/04\/new-policy-brief-collective-scalable-strategies-for-non-conventional-water-resources\/","title":{"rendered":"New Policy Brief: Collective &#038; Scalable Strategies for Non-Conventional Water Resources"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;2rem||4rem||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;2_5,3_5&#8243; _builder_version=&#8221;4.25.1&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;2_5&#8243; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][dsm_perspective_image src=&#8221;https:\/\/retouch-nexus.eu\/wp-content\/uploads\/2026\/06\/Belgium_page-0001.jpg&#8221; title_text=&#8221;Belgium_page-0001&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dsm_perspective_image][\/et_pb_column][et_pb_column type=&#8221;3_5&#8243; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h5 style=\"text-align: center;\">Collective Rainwater Management in Flanders<\/h5>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p style=\"text-align: justify;\">Flanders faces growing water stress, prompting increasing interest in decentralised, circular water management solutions, such as buffering and reusing rainwater locally or recharging groundwater. However, the business case for these solutions is often unclear, hindering investment. This RETOUCH NEXUS policy brief applies a full <strong>cost-benefit analysis (CBA)<\/strong> to a greenfield business park in Flanders, comparing individual rainwater systems against a collective solution over a 40-year horizon. The results reveal a clear economic and ecological advantage for collective approaches, and offer a replicable framework for scaling this evidence across Flanders and similar European contexts.<\/p>\n<p>[\/et_pb_text][et_pb_button button_url=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9zZG1fZG93bmxvYWRzIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjQ0MDY4MTUifX0=@&#8221; url_new_window=&#8221;on&#8221; button_text=&#8221;Read Our Policy Brief&#8221; button_alignment=&#8221;center&#8221; _builder_version=&#8221;4.27.6&#8243; _dynamic_attributes=&#8221;button_url&#8221; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Features&#8221; _builder_version=&#8221;4.17.6&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;0rem||3rem||false|false&#8221; locked=&#8221;off&#8221; collapsed=&#8221;on&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.25.1&#8243; _module_preset=&#8221;5138c454-be54-4233-bd3b-f8e6a8747976&#8243; width=&#8221;100%&#8221; custom_padding=&#8221;||2px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.17.3&#8243; _module_preset=&#8221;73121f80-a3ef-4484-8763-c3f18e3c56d2&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_heading title=&#8221;Key messages&#8221; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;c33f07d9-41e0-421a-8799-5799df695cce&#8221; title_font=&#8221;&#8211;et_global_heading_font|Syne_weight|||||||&#8221; title_text_color=&#8221;#0e0c19&#8243; title_line_height=&#8221;1.2em&#8221; custom_margin=&#8221;||10px||false|false&#8221; title_font_size_tablet=&#8221;28px&#8221; title_font_size_phone=&#8221;20px&#8221; title_font_size_last_edited=&#8221;on|phone&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_heading][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;5138c454-be54-4233-bd3b-f8e6a8747976&#8243; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.17.3&#8243; _module_preset=&#8221;73121f80-a3ef-4484-8763-c3f18e3c56d2&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|800|||||||&#8221; header_text_color=&#8221;#B7D983&#8243; header_font_size=&#8221;60px&#8221; text_orientation=&#8221;right&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>1<\/h1>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.17.3&#8243; _module_preset=&#8221;73121f80-a3ef-4484-8763-c3f18e3c56d2&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_text quote_border_color=&#8221;#83c5be&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;2c55a9c4-feed-423b-9edb-ae0b5b365cac&#8221; text_font=&#8221;&#8211;et_global_body_font|Inter_weight|||||||&#8221; link_font=&#8221;|Inter_weight|||||||&#8221; link_text_color=&#8221;#006d77&#8243; quote_font=&#8221;Syne|Syne_weight|||||||&#8221; quote_text_color=&#8221;#0e0c19&#8243; header_font=&#8221;Syne|Syne_weight|||||||&#8221; header_text_color=&#8221;#0e0c19&#8243; header_font_size=&#8221;72px&#8221; header_line_height=&#8221;1.15em&#8221; header_2_font=&#8221;Syne|Syne_weight|||||||&#8221; header_2_text_color=&#8221;#0e0c19&#8243; header_2_font_size=&#8221;50px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_3_font=&#8221;Syne|Syne_weight|||||||&#8221; header_3_text_color=&#8221;#0e0c19&#8243; header_3_font_size=&#8221;32px&#8221; header_3_line_height=&#8221;1.3em&#8221; header_4_font=&#8221;Syne|Syne_weight|||||||&#8221; header_4_text_color=&#8221;#0e0c19&#8243; header_4_font_size=&#8221;24px&#8221; header_4_line_height=&#8221;1.4em&#8221; header_5_font=&#8221;Syne|Syne_weight|||||||&#8221; header_5_text_color=&#8221;#0e0c19&#8243; header_5_font_size=&#8221;18px&#8221; header_5_line_height=&#8221;1.4em&#8221; header_6_font=&#8221;Syne|Syne_weight|||||||&#8221; header_6_text_color=&#8221;#0e0c19&#8243; header_6_line_height=&#8221;1.5em&#8221; custom_margin=&#8221;||||false|false&#8221; text_font_size_tablet=&#8221;15px&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221; header_font_size_tablet=&#8221;40px&#8221; header_font_size_phone=&#8221;24px&#8221; header_font_size_last_edited=&#8221;on|desktop&#8221; header_2_font_size_tablet=&#8221;28px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; header_3_font_size_tablet=&#8221;22px&#8221; header_3_font_size_phone=&#8221;17px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; header_4_font_size_tablet=&#8221;18px&#8221; header_4_font_size_phone=&#8221;15px&#8221; header_4_font_size_last_edited=&#8221;on|tablet&#8221; header_5_font_size_tablet=&#8221;15px&#8221; header_5_font_size_phone=&#8221;14px&#8221; header_5_font_size_last_edited=&#8221;on|desktop&#8221; header_6_font_size_tablet=&#8221;13px&#8221; header_6_font_size_phone=&#8221;13px&#8221; header_6_font_size_last_edited=&#8221;on|desktop&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"km-title\" style=\"text-align: justify;\">\n<div class=\"km-title\"><strong>Collective systems are more cost-effective than individual ones:<\/strong> A 40-year CBA at the Keiberg Vossem business park shows a net saving of<span>\u00a0<\/span><strong>\u20ac242,808<\/strong><span>\u00a0<\/span>for a collective rainwater system compared to individual tanks. Shared infrastructure reduces per-unit investment and operational costs while increasing total volumes captured and reused.<\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|800|||||||&#8221; header_text_color=&#8221;#B7D983&#8243; header_font_size=&#8221;60px&#8221; text_orientation=&#8221;right&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>2<\/h1>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text quote_border_color=&#8221;#83c5be&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;2c55a9c4-feed-423b-9edb-ae0b5b365cac&#8221; text_font=&#8221;&#8211;et_global_body_font|Inter_weight|||||||&#8221; link_font=&#8221;|Inter_weight|||||||&#8221; link_text_color=&#8221;#006d77&#8243; quote_font=&#8221;Syne|Syne_weight|||||||&#8221; quote_text_color=&#8221;#0e0c19&#8243; header_font=&#8221;Syne|Syne_weight|||||||&#8221; header_text_color=&#8221;#0e0c19&#8243; header_font_size=&#8221;72px&#8221; header_line_height=&#8221;1.15em&#8221; header_2_font=&#8221;Syne|Syne_weight|||||||&#8221; header_2_text_color=&#8221;#0e0c19&#8243; header_2_font_size=&#8221;50px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_3_font=&#8221;Syne|Syne_weight|||||||&#8221; header_3_text_color=&#8221;#0e0c19&#8243; header_3_font_size=&#8221;32px&#8221; header_3_line_height=&#8221;1.3em&#8221; header_4_font=&#8221;Syne|Syne_weight|||||||&#8221; header_4_text_color=&#8221;#0e0c19&#8243; header_4_font_size=&#8221;24px&#8221; header_4_line_height=&#8221;1.4em&#8221; header_5_font=&#8221;Syne|Syne_weight|||||||&#8221; header_5_text_color=&#8221;#0e0c19&#8243; header_5_font_size=&#8221;18px&#8221; header_5_line_height=&#8221;1.4em&#8221; header_6_font=&#8221;Syne|Syne_weight|||||||&#8221; header_6_text_color=&#8221;#0e0c19&#8243; header_6_line_height=&#8221;1.5em&#8221; custom_margin=&#8221;||||false|false&#8221; text_font_size_tablet=&#8221;15px&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221; header_font_size_tablet=&#8221;40px&#8221; header_font_size_phone=&#8221;24px&#8221; header_font_size_last_edited=&#8221;on|desktop&#8221; header_2_font_size_tablet=&#8221;28px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; header_3_font_size_tablet=&#8221;22px&#8221; header_3_font_size_phone=&#8221;17px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; header_4_font_size_tablet=&#8221;18px&#8221; header_4_font_size_phone=&#8221;15px&#8221; header_4_font_size_last_edited=&#8221;on|tablet&#8221; header_5_font_size_tablet=&#8221;15px&#8221; header_5_font_size_phone=&#8221;14px&#8221; header_5_font_size_last_edited=&#8221;on|desktop&#8221; header_6_font_size_tablet=&#8221;13px&#8221; header_6_font_size_phone=&#8221;13px&#8221; header_6_font_size_last_edited=&#8221;on|desktop&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"km-title\">\n<div class=\"km-title\" style=\"text-align: justify;\"><strong>Multi-benefit analysis is essential to make the business case visible:<\/strong> Benefits span drinking water savings (\u20ac0.59\/m\u00b3), wastewater treatment avoidance (\u20ac0.30\/m\u00b3), and groundwater-related costs (\u20ac0.40\/m\u00b3). A standard single-sector analysis misses most of the value. Integrating a water balance module with avoided-cost valuation reveals the full picture.<\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|800|||||||&#8221; header_text_color=&#8221;#B7D983&#8243; header_font_size=&#8221;60px&#8221; text_orientation=&#8221;right&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>3<\/h1>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text quote_border_color=&#8221;#83c5be&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;2c55a9c4-feed-423b-9edb-ae0b5b365cac&#8221; text_font=&#8221;&#8211;et_global_body_font|Inter_weight|||||||&#8221; link_font=&#8221;|Inter_weight|||||||&#8221; link_text_color=&#8221;#006d77&#8243; quote_font=&#8221;Syne|Syne_weight|||||||&#8221; quote_text_color=&#8221;#0e0c19&#8243; header_font=&#8221;Syne|Syne_weight|||||||&#8221; header_text_color=&#8221;#0e0c19&#8243; header_font_size=&#8221;72px&#8221; header_line_height=&#8221;1.15em&#8221; header_2_font=&#8221;Syne|Syne_weight|||||||&#8221; header_2_text_color=&#8221;#0e0c19&#8243; header_2_font_size=&#8221;50px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_3_font=&#8221;Syne|Syne_weight|||||||&#8221; header_3_text_color=&#8221;#0e0c19&#8243; header_3_font_size=&#8221;32px&#8221; header_3_line_height=&#8221;1.3em&#8221; header_4_font=&#8221;Syne|Syne_weight|||||||&#8221; header_4_text_color=&#8221;#0e0c19&#8243; header_4_font_size=&#8221;24px&#8221; header_4_line_height=&#8221;1.4em&#8221; header_5_font=&#8221;Syne|Syne_weight|||||||&#8221; header_5_text_color=&#8221;#0e0c19&#8243; header_5_font_size=&#8221;18px&#8221; header_5_line_height=&#8221;1.4em&#8221; header_6_font=&#8221;Syne|Syne_weight|||||||&#8221; header_6_text_color=&#8221;#0e0c19&#8243; header_6_line_height=&#8221;1.5em&#8221; custom_margin=&#8221;||||false|false&#8221; text_font_size_tablet=&#8221;15px&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221; header_font_size_tablet=&#8221;40px&#8221; header_font_size_phone=&#8221;24px&#8221; header_font_size_last_edited=&#8221;on|desktop&#8221; header_2_font_size_tablet=&#8221;28px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; header_3_font_size_tablet=&#8221;22px&#8221; header_3_font_size_phone=&#8221;17px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; header_4_font_size_tablet=&#8221;18px&#8221; header_4_font_size_phone=&#8221;15px&#8221; header_4_font_size_last_edited=&#8221;on|tablet&#8221; header_5_font_size_tablet=&#8221;15px&#8221; header_5_font_size_phone=&#8221;14px&#8221; header_5_font_size_last_edited=&#8221;on|desktop&#8221; header_6_font_size_tablet=&#8221;13px&#8221; header_6_font_size_phone=&#8221;13px&#8221; header_6_font_size_last_edited=&#8221;on|desktop&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"km-title\" style=\"text-align: justify;\"><strong>Surplus rainwater generates critical WEFE co-benefits:<\/strong> Rainwater that cannot be used on-site can be directed to groundwater recharge, supporting local ecosystems and agricultural water availability during dry periods. These cross-sectoral benefits, reduced energy for treatment, ecosystem support, agricultural resilience, must be recognised in policy frameworks to justify collective investment.<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|800|||||||&#8221; header_text_color=&#8221;#B7D983&#8243; header_font_size=&#8221;60px&#8221; text_orientation=&#8221;right&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>4<\/h1>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text quote_border_color=&#8221;#83c5be&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;2c55a9c4-feed-423b-9edb-ae0b5b365cac&#8221; text_font=&#8221;&#8211;et_global_body_font|Inter_weight|||||||&#8221; link_font=&#8221;|Inter_weight|||||||&#8221; link_text_color=&#8221;#006d77&#8243; quote_font=&#8221;Syne|Syne_weight|||||||&#8221; quote_text_color=&#8221;#0e0c19&#8243; header_font=&#8221;Syne|Syne_weight|||||||&#8221; header_text_color=&#8221;#0e0c19&#8243; header_font_size=&#8221;72px&#8221; header_line_height=&#8221;1.15em&#8221; header_2_font=&#8221;Syne|Syne_weight|||||||&#8221; header_2_text_color=&#8221;#0e0c19&#8243; header_2_font_size=&#8221;50px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_3_font=&#8221;Syne|Syne_weight|||||||&#8221; header_3_text_color=&#8221;#0e0c19&#8243; header_3_font_size=&#8221;32px&#8221; header_3_line_height=&#8221;1.3em&#8221; header_4_font=&#8221;Syne|Syne_weight|||||||&#8221; header_4_text_color=&#8221;#0e0c19&#8243; header_4_font_size=&#8221;24px&#8221; header_4_line_height=&#8221;1.4em&#8221; header_5_font=&#8221;Syne|Syne_weight|||||||&#8221; header_5_text_color=&#8221;#0e0c19&#8243; header_5_font_size=&#8221;18px&#8221; header_5_line_height=&#8221;1.4em&#8221; header_6_font=&#8221;Syne|Syne_weight|||||||&#8221; header_6_text_color=&#8221;#0e0c19&#8243; header_6_line_height=&#8221;1.5em&#8221; custom_margin=&#8221;||||false|false&#8221; text_font_size_tablet=&#8221;15px&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221; header_font_size_tablet=&#8221;40px&#8221; header_font_size_phone=&#8221;24px&#8221; header_font_size_last_edited=&#8221;on|desktop&#8221; header_2_font_size_tablet=&#8221;28px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; header_3_font_size_tablet=&#8221;22px&#8221; header_3_font_size_phone=&#8221;17px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; header_4_font_size_tablet=&#8221;18px&#8221; header_4_font_size_phone=&#8221;15px&#8221; header_4_font_size_last_edited=&#8221;on|tablet&#8221; header_5_font_size_tablet=&#8221;15px&#8221; header_5_font_size_phone=&#8221;14px&#8221; header_5_font_size_last_edited=&#8221;on|desktop&#8221; header_6_font_size_tablet=&#8221;13px&#8221; header_6_font_size_phone=&#8221;13px&#8221; header_6_font_size_last_edited=&#8221;on|desktop&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"km-title\" style=\"text-align: justify;\"><strong>Governance and contractual frameworks are needed to enable collective management:<\/strong> Multi-actor coordination between businesses, municipalities, water utilities (De Watergroep), and research partners is required. Contractual arrangements for collective rainwater trading and distribution, supported by the Flemish Blue Deal framework, provide a concrete governance pathway.<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|800|||||||&#8221; header_text_color=&#8221;#B7D983&#8243; header_font_size=&#8221;60px&#8221; text_orientation=&#8221;right&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>5<\/h1>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.26.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text quote_border_color=&#8221;#83c5be&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;2c55a9c4-feed-423b-9edb-ae0b5b365cac&#8221; text_font=&#8221;&#8211;et_global_body_font|Inter_weight|||||||&#8221; link_font=&#8221;|Inter_weight|||||||&#8221; link_text_color=&#8221;#006d77&#8243; quote_font=&#8221;Syne|Syne_weight|||||||&#8221; quote_text_color=&#8221;#0e0c19&#8243; header_font=&#8221;Syne|Syne_weight|||||||&#8221; header_text_color=&#8221;#0e0c19&#8243; header_font_size=&#8221;72px&#8221; header_line_height=&#8221;1.15em&#8221; header_2_font=&#8221;Syne|Syne_weight|||||||&#8221; header_2_text_color=&#8221;#0e0c19&#8243; header_2_font_size=&#8221;50px&#8221; header_2_line_height=&#8221;1.2em&#8221; header_3_font=&#8221;Syne|Syne_weight|||||||&#8221; header_3_text_color=&#8221;#0e0c19&#8243; header_3_font_size=&#8221;32px&#8221; header_3_line_height=&#8221;1.3em&#8221; header_4_font=&#8221;Syne|Syne_weight|||||||&#8221; header_4_text_color=&#8221;#0e0c19&#8243; header_4_font_size=&#8221;24px&#8221; header_4_line_height=&#8221;1.4em&#8221; header_5_font=&#8221;Syne|Syne_weight|||||||&#8221; header_5_text_color=&#8221;#0e0c19&#8243; header_5_font_size=&#8221;18px&#8221; header_5_line_height=&#8221;1.4em&#8221; header_6_font=&#8221;Syne|Syne_weight|||||||&#8221; header_6_text_color=&#8221;#0e0c19&#8243; header_6_line_height=&#8221;1.5em&#8221; custom_margin=&#8221;||||false|false&#8221; text_font_size_tablet=&#8221;15px&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221; header_font_size_tablet=&#8221;40px&#8221; header_font_size_phone=&#8221;24px&#8221; header_font_size_last_edited=&#8221;on|desktop&#8221; header_2_font_size_tablet=&#8221;28px&#8221; header_2_font_size_phone=&#8221;20px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; header_3_font_size_tablet=&#8221;22px&#8221; header_3_font_size_phone=&#8221;17px&#8221; header_3_font_size_last_edited=&#8221;on|phone&#8221; header_4_font_size_tablet=&#8221;18px&#8221; header_4_font_size_phone=&#8221;15px&#8221; header_4_font_size_last_edited=&#8221;on|tablet&#8221; header_5_font_size_tablet=&#8221;15px&#8221; header_5_font_size_phone=&#8221;14px&#8221; header_5_font_size_last_edited=&#8221;on|desktop&#8221; header_6_font_size_tablet=&#8221;13px&#8221; header_6_font_size_phone=&#8221;13px&#8221; header_6_font_size_last_edited=&#8221;on|desktop&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"km-title\" style=\"text-align: justify;\"><strong>The CBA methodology is directly replicable across Flanders and beyond:<\/strong> The core framework, water balance combined with avoided-cost valuation, can be applied to other business parks, industrial zones, and residential areas. Scaling up to a regional programme under the Flemish Blue Deal, with standardised incentive structures and cost-sharing models, represents the next step.<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Call to Action&#8221; _builder_version=&#8221;4.23.1&#8243; _module_preset=&#8221;default&#8221; locked=&#8221;off&#8221; collapsed=&#8221;on&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.25.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][dsm_blog_carousel include_categories=&#8221;70&#8243; excerpt_length=&#8221;15&#8243; use_author=&#8221;off&#8221; use_readmore=&#8221;on&#8221; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; body_line_height=&#8221;1.5em&#8221; global_colors_info=&#8221;{}&#8221;][\/dsm_blog_carousel][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p><div class=\"et_pb_module dsm_perspective_image dsm_perspective_image_0\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module_inner\">\n\t\t\t\t\t<div class=\"dsm-perspective-image-wrapper et_always_center_on_mobile\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<span class=\"et_pb_image_wrap \"><img decoding=\"async\" src=\"https:\/\/retouch-nexus.eu\/wp-content\/uploads\/2026\/06\/Belgium_page-0001.jpg\" alt=\"\" title=\"Belgium_page-0001\" \/><\/span>\n\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>Collective Rainwater Management in FlandersFlanders faces growing water stress, prompting increasing interest in decentralised, circular water management solutions, such as buffering and reusing rainwater locally or recharging groundwater. However, the business case for these solutions is often unclear, hindering investment. This RETOUCH NEXUS policy brief applies a full cost-benefit analysis [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":4406826,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[70,74],"tags":[],"class_list":["post-4406810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-belgium-cs","category-policy-briefs"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/posts\/4406810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/comments?post=4406810"}],"version-history":[{"count":6,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/posts\/4406810\/revisions"}],"predecessor-version":[{"id":4406842,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/posts\/4406810\/revisions\/4406842"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/media\/4406826"}],"wp:attachment":[{"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/media?parent=4406810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/categories?post=4406810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/retouch-nexus.eu\/fr\/wp-json\/wp\/v2\/tags?post=4406810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}