Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 7740.
  1. Library Resource
    Articles et Livres
    août, 2018

    Representation of land-use and hydrologic interactions in respective models has traditionally been problematic. The use of static land-use in most hydrologic models or that of the use of simple hydrologic proxies in land-use change models call for more integrated approaches. The objective of this study is to assess whether dynamic feedback between land-use change and hydrology can (1) improve model performances, and/or (2) produce a more realistic quantification of ecosystem services. To test this, we coupled a land-use change model and a hydrologic mode.

  2. Library Resource
    Articles et Livres
    août, 2018

    A water and soil quality baseline study was carried out across the ~ 4500 km2 Vientiane Plain in Lao PDR. Eight water quality and nine soil parameters were analysed using field kits at 95 sites in March 2015. Elevated electrical conductivity and chloride were apparent at two sites due to geogenic leaching from the marine rock-salt present in some areas. Groundwater was acidic in most locations. Nitrate and faecal contamination were also observed from nitrogenous fertilizers (diffuse) and from leaky sewage pits (localised) respectively.

  3. Library Resource
    Articles et Livres
    décembre, 2018
    Chine

    Environment and Production Technology Division, International Food Policy Research Institute, Washington, DC 20005; bState Key Laboratory for Biology
    of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; cCentre for Crop Systems
    Analysis, Wageningen University, 6700 AK Wageningen, The Netherlands; dChina Center for Agricultural Policy, School of Advanced Agricultural Sciences,

  4. Library Resource
    Articles et Livres
    juin, 2018
    Sri Lanka

    Storage of surface water is widely regarded as a form of insurance against rainfall variability. However, creation of surface storage often endanger the functions of natural ecosystems, and, in turn, ecosystem services that bene t humans. The issues of optimal size, placement and the number of reservoirs in a river basin – which maximizes sustainable bene ts from storage – remain subjects for debate. This study examines the above issues through the analysis of a range of reservoir con gurations in the Malwatu Oya river basin in the dry zone of Sri Lanka.

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