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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 153.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 2012

    The interactions between precipitation, streamflow and groundwater are very complex. In cold temperate regions characterized by harsh winters, winter streamflow is mainly derived from aquifers that are recharged in the spring, during snowmelt, and in the fall, when evapotranspiration is subdued.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015

    Hydrological classification systems seek to provide information about the dominant processes in the catchment to enable information to be transferred between catchments. Currently, there is no widely agreed‐upon system for classifying river catchments. This paper develops a novel approach to classifying catchments based on the temporal dependence structure of daily mean river flow time series, applied to 116 near‐natural ‘benchmark’ catchments in the UK. The classification system is validated using 49 independent catchments.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 2016
    Tailandia

    Tropical mangrove forests can play an important role in the functioning of adjacent marine ecosystems, by protecting them from an excess in land‐derived sediment and nutrients. The strength of this interaction may however depend on the nutrient status of the mangrove forest. This study related the nutrient status of eight mangrove forests in Phang Nga Bay (Thailand) to the land‐cover distributions in the upstream catchment areas.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015

    Hydrological models play a significant role in modelling river flow for decision making support in water resource management. In the past decades, many researchers have made a great deal of efforts in calibrating and validating various models, with each study being focused on one or two models. As a result, there is a lack of comparative analysis on the performance of those models to guide hydrologists to choose appropriate models for the individual climate and physical conditions.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009
    Somalia

    Soil loss is a major concern for land managers due to its influence on biomass production, surface water quality and landscape beauty. In Somalia, the risk of soil loss is accelerated by the removal of vegetation, bad land use practices and negative impacts of urbanization. The political upheavals and consequent insecurity in the country are major limitations for detailed database and research in soil loss.

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 2012

    This paper presents an interactive web‐based rapid assessment tool that generates key water related indicators to support decision making by stakeholders in land use planning. The tool is built on a consistent science based method that combines remote sensing with hydrological and socioeconomic analyses. It generates transparent, impartial, and verifiable information regarding the impact of land use changes on water productivity, water consumption, water availability, and employment.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009

    An assessment of sensitivity to land degradation has been carried out in the Extremadura region, SW Spain, by means of a modelling approach developed by the European Commission funded MEDALUS project (Mediterranean Desertification and Land Use) which identifies such areas on the basis of an index (Environmentally Sensitive Area index, ESA index) that incorporates data on environmental quality (climate, vegetation, soil) as well as anthropogenic factors (management).

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009

    The International Commission on Irrigation and Drainage (ICID), a global network organization with 106 member countries in its fold, is dedicated to the promotion of best practices in water for agriculture, and addresses water supply and management for food production, including drainage and flood control. While striving to improve water and land management, and enhancing the world supply of food and fibre, ICID takes on board environmental concerns and seeks sustainable solutions.

  9. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009

    The coastal zone comprises only 3% of the earth's surface, but contains a disproportionately high amount of its assets. Tidal areas include all those coastal areas where the tidal processes are capable of affecting man's activity or of being influenced by man. Tidal areas differ greatly depending on their location, geophysical conditions, climate, tidal range and cultural differences. Throughout the world, tidal areas have been and are being developed. These developments will continue as food production will need to be doubled in the next 25 years.

  10. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009
    Zimbabwe

    Three smallholder villages located in typical communal (from 1948), old (1987) and new (2002) resettlement areas, on loamy sand, sandy loam and clay soils, respectively, were selected to explore differences on natural resource management and land productivity. Focus group discussions and surveys were carried out with farmers. Additionally, farmers in three wealth classes per village were chosen for a detailed assessment of their main production systems.

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