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Portail d'information géographique

Résultats de la recherche (345 résultats)

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  • Botswana ; Geographical information system ; Groundwater ; Rural development ; Water ; Water management ; Water resources
  • 1999
  • Cameroon ; Polluted water ; Urban administration ; Urban area ; Water ; Water erosion ; Water management ; Water supply
  • 1999
  • Prediction of rainfall-triggered landslides : a test of the antecedent water status model
  • Applied geomorphology ; Forecast ; Landslide ; Natural hazards ; New Zealand ; North Island ; Precipitation ; Soil water ; Urban area ; Water balance
  • water status has been used empirically to identify a threshold condition for landslide triggering. The model produces a satisfactory level of prediction, particularly for periods of concentrated landslide activity.
  • 1999
  • Niger tiger bush as a natural water harvesting system
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Duricrust ; Ecosystem ; Niger ; Rill wash ; Semi-arid area ; Soil erosion ; Soil water ; Vegetation ; Water balance ; Zoning
  • 1999
  • Arctic Region ; Barents Sea ; Fluvial water ; Heat exchange ; Marine hydrology ; Salinity ; Sea water ; Seasonal variation ; Water exchange ; Water mass ; Water temperature ; White Sea
  • 1999
  • Cereal ; Crop ; Geographical information system ; Irrigation ; Michigan ; Model ; Simulation ; Soy bean ; United States of America ; Water ; Water needs ; Water resources
  • Four simulation models are used to estimate the evapotranspiration rates and irrigation water requirements of corn, drybean, soybean and sugarbeet production in the Saginaw Bay basin. The availability of streamflow for irrigation supply is evaluated
  • in the mass balance equation to determine if the available water resources are sufficient to meet the crop's irrigation water requirements. GIS is used to process and analyze the data sets of soils, climate, and water resource features to provide inputs
  • 1999
  • Magnitude-frequency analysis of water redistribution along a climate gradient in Spain
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Albacete ; Arid area ; Climate ; Infiltration ; Mediterranean area ; Murcia ; Precipitation ; Rainfall simulation ; Rill wash ; Soil ; Soil erosion ; Soil water ; Spain ; Valencia ; Vegetation ; Water cycle ; Water erosion ; Zoning
  • The aim of this paper is to quantify the amount of surface water redistribution in 3 areas in Spain (Murcia, Valencia, Albacete) having different climatological characteristics, for a fine spatial scale and temporal scales of 1 yr and 10 yr
  • 1999
  • Use of cosmogenic 35S for comparing ages of water from three alpine-subalpine basins in the Colorado Front Range
  • Colorado ; Hydrochemistry ; Hydrology ; Isotope analysis ; Meltwater ; Mountain ; Rocky Mountains ; United States of America ; Water quality ; Watershed
  • The 35S activity of sulfate in water provides an estimate of the residence time of atmospherically deposited sulfate, and assuming conservative response of sulfate along the hydrologic flowpath, 35S activity can be used to approximate the residence
  • time of water. In this paper, the effect of basin morphology on the release of snowmelt water to surface streams is explored. The activity of 35S is used to compare the estimated ages of water exiting 3 small alpine-subalpine basins in north-central
  • 1999
  • Bibliography ; Data base ; Documentation ; Hydraulic works ; Legislation ; Polluted water ; Spain ; Water ; Water economics ; Water management ; Water needs ; Water pollution ; Water purification ; Water quality ; Water supply ; Water use
  • 1999
  • Regional impacts of environmental and global change : water use in the Valais
  • Climatic warming ; Electricity ; Global change ; Impact ; Market economy ; Sustainable development ; Switzerland ; Valais ; Water ; Water management ; Water resources ; Water use
  • 1999
  • Basse-Normandie ; Coastal environment ; France ; Regional planning ; Water ; Water economics ; Water management ; Water needs ; Water pollution ; Water quality
  • 1999
  • Water balance in a banded vegetation pattern. A case study of tiger bush in western Niger
  • The significance of soil, water and landscape processes in banded vegetation patterning
  • Biogenic process ; Ecosystem ; Infiltration ; Niger ; Porosity ; Rill wash ; Sahel ; Soil moisture ; Soil water ; Water balance
  • This paper aims to calculate water balance of an entire tiger bush unit, including bare and vegetated areas, to validate a rain redistribution hypothesis. They monitored measurements of runoff and soil moisture content in each zone composing a tiger
  • 1999
  • Dam ; Germany ; Hydraulic works ; Natural resources ; Risk ; Water ; Water cycle ; Water economics ; Water management ; Water resources ; Water use
  • 1999
  • A preliminary study on ecological water demand estimation in the arid region - a case in the Qaidam Basin
  • Arid area ; Cartography ; China ; Ecosystem ; LANDSAT ; Landscape ; Qinghai ; Remote sensing ; Thematic Mapper ; Vegetation ; Water needs
  • This paper emphasized the relationship between environment and water, taking ecological demand water (EWD) in the Qaidam Basin, an inner basin in northwestern China, as a key issue to discuss based on landscape mapping. First, the spatial
  • heterogeneity of ecosystem can be reflected well by landscape pattern; landscape patterns adjust closely with environmental changes; finally, water condition is the key ecological factor for landscape pattern in the arid region. The landsat TM image of 1:100,000
  • 1999
  • Aquatic ecosystem ; Drainage ; Ecosystem ; Fish ; Humid environment ; Irrigation ; Natural resources ; Soil water ; Water ; Water budget ; Water cycle ; Water needs ; Water use
  • 1999
  • Agricultural people ; Drinking water ; European part of Russia ; Oblast ; Water ; Water economics ; Water management ; Water resources ; Water supply ; Yaroslavl
  • 1999
  • Agroclimatology ; Agroecosystem ; Heat exchange ; Soil water ; Water ; Water balance ; Water exchange ; Water resources ; Water supply
  • 1999
  • Continental water ; Ecology ; Groundwater ; Hydrogeology ; Runoff ; Sea water ; Underground flow ; Water exchange ; Water quality ; Water regime ; Water resources
  • 1999
  • The performance of selected soil and water conservation measures - case studies from Ethiopia and Eritrea
  • Agropedology ; Arid area ; Biomass ; Crop yield ; Eritrea ; Ethiopia ; Experimentation ; Rill wash ; Soil conservation ; Soil erosion ; Soil water
  • This paper investigates the performance of selected soil and water conservation measures in the highlands of Ethiopia and Eritrea, namely Fanya Juu, soil/stone bund, grass strips and double ditches. The impact of these techniques on runoff, soil
  • 1999
  • Horizontal water trap for measurement of aeolian sand transport
  • with water to capture the blown sand. The water trap has high efficiency and does not disturb the wind field or induce upwind scour. Deployment on Padre Island, Texas, indicated that this portable and adjustable trap catches and retains all the sand blown
  • 1999