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Gérer la richesse des zones humides du Mali pour les populations et la nature

Wetlands International existe au Mali depuis 1998, année au cours de laquelle elle a commencé un partenariat avec le Gouvernement du Mali afin d’aider à mieux gérer les ressources en eau du pays tant pour ses populations que sa nature. Ces premiers efforts visaient à explorer l’état des habitats naturels uniques du Mali, en particulier ses terres humides importantes au plan international, le Delta intérieur du Niger, et à partager largement ces conclusions et données.

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FISH PASSES: fish ladders and other pass systems

Since the middle of the 20th century, humans have significantly altered the hydrological and hydraulic system of European rivers, with (hydropower) dams, dredging, rectifications, channelling, etc. One of the most damaging effects of these activities results from constructing crossing works over rivers (dams, waterwheels, bridge foundations, etc), which frequently impede or limit the free movement of fish fauna.

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ECOSYSTEM SERVICES AND RIVER RESTORATION

Understanding the economic and social value of ecosystem services in a river system can help prioritise river restoration projects. Currently, public administrations rarely consider river restoration projects as investments. Funding for restoring natural capital is substantially lower than the funding available to build and maintain built infrastructure. By reframing river restoration projects as restoration of natural capital it is possible to attract the financial resources needed to restore river systems and better integrate environmental and social values.

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HOW CAN A RIVER BE HYDROLOGICALLY RESTORED?

This technical note on river restoration discusses how hydrological restoration should be incorporated in river restoration, and which are the most adequate strategies to design and implement the restored (functional) flows in rivers. Restoration of a river's flow regime should be the first step in any attempt to recover its ecological integrity, as the flow pattern determines, more than any other physical or environmental feature, the structure and spatial-temporal functioning of the river system.

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WHAT IS RIVER RESTORATION?

This technical note explores the concept of river restoration, addressing it as a process to re-establish or recover a natural system through the elimination of the impacts that degrade it throughout a prolonged period of time, until a natural and self-sustaining functioning is achieved. The process of restoration must attain naturalness, functionality, dynamism, complexity, diversity and resilience of the natural system. Real restoration is, therefore, self-restoration.

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CHANNEL GRADIENT: Calculation process using GIS

This technical note on river restoration adresses the calculation of river channel gradients using Geographic Information Systems (GIS). The channel gradient is a fundamental parameter in the geomorphologic characterisation of river systems; it is a reflection of the changes in the longitudinal sequence of a river through the presence of waterfalls, step pools (fasts and pools), riffle pools (rapids and pools), etc., which makes it a discriminating factor of environmental dynamics of differentiated processes.

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RIVER SINUOSITY INDEX: Geomorphological characterisation

This technoical notes on river restoration explores the concept of sinuosity. Sinuosity is used to define the degree of meandering of a riverbed, which is then used to establish geomorphological river types.

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FLUVIAL TERRITORY: Restoration space

This technical note on river restoration explores the concept of Fluvial Territory as a space of sufficient width and continuity to retain or regain the hydro-­‐geomorphologic dynamic, obtain a continuous riverside passageway that would ensure ecological diversity (Habitats Directive 1992/43/CE) and the bioclimatic function of the river system, comply with a good ecological state (Water Directive 2000/60/CE), laminate the avenues naturally (Flood Directive 2007/60/CE), solve management problems of floodable areas, as well as improving and consolidating the landscape around the river.

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Managing Mali’s Wetland Wealth for People and Nature

Wetlands International has been in Mali since 1998. As we near the end of a second decade in the country, we want to highlight and celebrate what’s been achieved and learnt within our growing network of partners. This document reflects on projects past while also looking to the future. More important still, it is a call for partners, old and new, to join us in writing the next chapters of the story – partners with the necessary funds, creativity, vision, ambition and energy to carry this exciting work forward.

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Poster : Canal Blocking

Canal Blocking has many benefits :

  • Restoration of 'wet' peat characteristics and reduction of fire
  • Return of the carbon sequestering capacity of peatland
  • Re-establishment of the water buffer fucntion and a reduction of floads
  • Opportunity to plant economically viable species like Jelutung for rubber and Tengkawang (illevenut) for edible oil production; it opens also possibilities for different forms of aquaqulture
  • return of original biodiversity that is opten unique to peat swamp forest 

 

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