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Forests and water

A thematic study prepared in the framework of the Global Forest Resources Assessment 2005













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    Book (stand-alone)
    Forests and Water
    International Momentum and Action
    2013
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    Forests play a crucial role in the hydrological cycle. Forests influence the amount of water available and regulate surface and groundwater flows while maintaining high water quality. Forests and trees contribute to the reduction of water-related risks such as landslides, local floods and droughts and help prevent desertification and salinization. Forested watersheds supply a high proportion of the world’s accessible fresh water for domestic, agricultural, industrial and ecological nee ds in both upstream and downstream areas. A key challenge faced by land, forest and water managers is to maximize the wide range of forest benefits without detriment to water resources and ecosystem function. This is particularly relevant in the context of adaptation to climate change, which increasingly reinforces the importance of sustainable forest management. As part of the follow-up to the Shiga Declaration and to the Warsaw Resolution 2, many events on forests and water were organized by FAO and other institutions between 2008 and 2011. Presenting experiences ranging from research to project implementation worldwide, these events provided new, up-to-date insight into the topic as well as important recommendations for the way forward. FAO took the initiative of synthesizing the main outcomes and recommendations resulting from this process to develop a comprehensive and practical international forests and water agenda to address future course of action.
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    Land-water linkages in rural watersheds 2002
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    It is often assumed that upstream land use practices have important impacts on water resources and affect the downstream users at a watershed scale. Payments by downstream users to upstream users for "environmental services" such as good water quality, less sediments or more regular water flow are widely discussed. However, much controversy exists about the direction and magnitude of such impacts, how they influence the relationships between upstream and downstream users, and which mechanisms al low for a sharing of resulting benefits and costs by all resource users in a watershed context. To address these issues, the FAO Land and Water Development Dicvision organized the electronic workshop "Lan-Water Linkages in Rural Watersheds" from 18 September to 27 October 2000. The present publication contains the proceedings of the workshop and two papers that set the stage for the workshop discussions. The complete workshop documentation, including discussion archive, background papers and cas e studies, is included on the CD-ROM that accompanies the document.
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    Report of the FAO/TCF workshop on fish passage design at cross-river obstacles – experiences from different countries, with potential relevance to Mongolia.
    Selenge Resort, Mongolia, 7–12 April 2014
    2015
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    The workshop “Fish passage design at cross-river obstacles – experiences from different countries, with potential relevance to Mongolia” was jointly organized by FAO and the Taimen Conservation Fund (TCF) of Mongolia and held in Mongolia in April 2014. Workshop participants included representatives from the Ministry of Nature and Green Development of Mongolia, the Egiin Gol Hydro Power Plant Project Unit (EGHPPPU), the Dorgon hydropower station, the Mongolian Mining Corporation, the National Wat er Association, civil society and the TCF. Workshop participants presented two country reports on the status of fish passage development, research and construction in Mongolia, and on the biology and behaviour of the most important fish species to be considered in planning fish passage facilities in Mongolia, and in particular in the Eg River. The resource persons presented knowledge on different fish passage issues from both the biological and the engineering perspectives. Although the known fa cts are mainly derived from studies in North America and Europe, the basic aspects can serve as “food for thought” also in other regions, including Mongolia. Information provided and designs presented should, however, under no circumstances just be copied but have to be adapted to local conditions (taking into due consideration the species present) while respecting the important basic design criteria which are valid for all passes of the same type at all locations, whether in Europe, North Ameri ca or Asia. As regards the planned Eg River hydropower plant, the workshop did not have a unanimous view concerning the need for, and the usefulness and the environmental impacts of, the planned dam construction. However, all workshop participants unanimously agreed that, should the dam on the Eg River be constructed, a fish passage system would be needed to mitigate the blocked upstream and downstream passage for maintaining genetic exchange between fish in the Eg and Selenge Rivers. The worksh op agreed that trap-andtransport for both upstream and downstream fish passage, with the option of later modifications, would be the only viable solution for this Eg River power plant. However, the resource persons clearly held that based on their assessment during the field visit and the additional information provided during the classroom sessions – from a fish ecological, biodiversity and fisheries point of view – the dam must not be constructed at the planned location because it would inflic t irreversible damage to the aquatic ecosystem. In fact, the excellent ecological status of the Eg River just upstream of the confluence with the Selenge River (and also further upstream in the watershed) calls for the preservation of the given morphological and hydrological characteristics. Alternatives should be sought as regards either the location of the dam (i.e. consider to construct one dam or several smaller dams on one or several other rivers that are less important for taimen) or the t ype of energy produced (solar or wind). Furthermore, the resource persons held that, most importantly, the workshop must not be seen as encouragement to construct new dams solely because the principles of the design and construction of fish passage facilities are known.

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