The Amazon basin faces irreversible environmental disturbance on an enormous scale due to hydroelectric dam development. Hundreds of existing and planned dams in both the Amazonian lowlands and the Andean headwaters are already impacting, and will continue affecting, waterways, floodplains and the estuary by disrupting sediment and nutrient flows.
This is the message of a new study, published in Nature, which quantified the impacts of dams on the hydrology and geography of each of the Amazon’s 19 major sub-basins.
The Extinction and Livestock international conference will examine how we can
transform our global food and farming systems to work for people, the planet
and animals. It will bring together diverse interests – conservation &
livestock production, land & water use, the environment & climate change,
ethics & economics, healthy & sustainable diets, food security, food
business– and act as a catalyst for future collaboration and solution
A ENCNB é um instrumento fundamental da prossecução da política de ambiente e na resposta às responsabilidades nacionais e internacionais de reduzir a perda de património natural. Avaliações à escala regional e global evidenciam, de modo crescente, que a prosperidade económica e o bem-estar da sociedade são suportados pelo capital natural, o que inclui os ecossistemas naturais e os seus serviços cuja funcionalidade depende, em larga escala, da utilização sustentável e eficiente dos recursos.
Water is both a key and limited resource in the Okavango Catchment of Southern Africa. It is vital for the ecosystem and the three riparian states Angola, Botswana and Namibia who use the water of the catchment for multiple purposes including pastoralism, farming and tourism. Socioeconomic changes, primarily strong population growth and increasing development demands pose significant challenges for the Okavango Catchment and its Integrated Water Resource Management (IWRM). In this paper, we first review the socioeconomic background and the current and projected water situation.
Current and future impacts of climate change include increasing variability in a number of biophysical processes, such as temperature, precipitation, and flooding. The Intergovernmental Panel on Climate Change (IPCC) has suggested that Southern Africa is particularly vulnerable to the anticipated impacts from global climate change and that social and ecological systems in the region will be disrupted and likely transformed in future decades.
Amongst human practices, agricultural surface-water management systems represent some of the largest integrated engineering works that shaped floodplains during history, directly or indirectly affecting the landscape. As a result of changes in agricultural practices and land use, many drainage networks have changed producing a greater exposure to flooding with a broad range of impacts on society, also because of climate inputs coupling with the human drivers.
The National Geomatics Center of China (NGCC) produced Global Land Cover (GlobalLand30) maps with 30 m spatial resolution for the years 2000 and 2009–2010, responding to the need for harmonized, accurate, and high-resolution global land cover data. This study aims to assess the mapping accuracy of the land surface water layer of GlobalLand30 for 2009–2010. A representative Mediterranean region, situated in Greece, is considered as the case study area, with 2009 as the reference year.
A CIDADE de Nampula acolhe hoje e amanhã um seminário regional para a revisão do Programa Nacional de Abastecimento de Água e Saneamento Rural (PRONASAR).
O encontro reúne profissionais do sector de Água e Saneamento, representantes da Sociedade Civil, e das Organizações não-governamentais da região Norte do país, que operam neste sector.
Nesta reunião regional serão apresentadas experiências e lições aprendidas, para além das capacidades de implementação de projectos no âmbito do PRONASAR, nas três províncias do Norte do país.