Coastal Bangladesh: Inclusive Canal Water for Agri-food Resilience
By International Rice Research Institute
TL;DR: Coastal communities in Bangladesh are revitalizing ancient canal systems to combat salinity and water scarcity, drastically improving agricultural output and reducing reliance on groundwater.
- Canal restoration dramatically cuts groundwater dependence.
- Community efforts are key to sustainable water management.
- Integrated farming systems boost food security.
- Sluice gates and flap gates manage water flow.
- Optimized crop calendars reduce flood risks.
- Policy actions are vital for long-term success.
Why it matters: Effective water management in saline-prone regions is crucial for global food security, as climate change intensifies water scarcity and salinity intrusion. This model provides a replicable framework for similar at-risk areas.
Do this next: Explore community-led water management techniques applicable to your local context.
Recommended for: Anyone interested in practical solutions for climate adaptation, water management, and community-led agricultural resilience in vulnerable coastal regions.
This documentary examines freshwater scarcity's severe impact on agri-food systems—crop agriculture, fisheries, and livestock—in saline-prone coastal Bangladesh, especially during the November-May dry season. Naturally occurring canal networks, crisscrossing deltaic regions and linking rivers to the sea, have historically stored rainwater, supported capture fishing for landless communities, and provided water for livestock and farming. As state-owned resources, these canals face siltation and neglect, exacerbating anthropogenic and climatic challenges like salinity intrusion. The film highlights community-led restoration efforts, including excavation to restore flow, installation of controlled sluice gates and flap gates to block saline water and manage drainage, reducing flood durations in polders for earlier crop planting. It showcases scalable models revitalizing over 100 km of canals across 80 micro-watersheds, dramatically cutting groundwater irrigation dependence from 42% to 4% and boosting surface water use to 55%, benefiting over 90,000 farming households. Key practices include rainwater harvesting in canals and reservoirs during wet seasons, community-based water-sharing systems with field-centric planning for equitable distribution, and integration with river management. Technical innovations feature climate-resilient community farming systems (CCFS) for sustainable intensification in coastal polders, sorjan cropping for saline fields combining raised beds with trenches for crops and fish, conservation agriculture via dibbling, zero tillage, mulching to conserve soil moisture and build organic matter, and dry-direct-seeded Aus rice to minimize water use. Optimized crop calendars with synchronized short- and medium-duration varieties reduce flood risks. The documentary advocates policy actions like maintaining canals, promoting salt-tolerant varieties (e.g., BRRI 52), alternative crops (sesame, sunflower), and integrated rice-fish systems using field rings for fish protection. National policy dialogues underscore localized solutions, community participation, and government-NGO collaboration to amplify marginalized voices, yielding 12-18% yield loss reductions and fostering resilient, self-sufficient agriculture adaptable to regenerative contexts globally.