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Résultats de la recherche (273 résultats)

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  • Indigenous water resources management and water utilisation in northern Namibia (former Ovamboland). Can tradition help to overcome current problems ?
  • Arid area ; Drinking water ; Namibia ; Rural area ; Water ; Water management ; Water needs ; Water resources
  • 2002
  • The water and sanitation scenario in India metropolitan cities : resources and management in Delhi, Calcutta, Chennai, Mumbai
  • Bombay ; Calcutta ; Delhi ; Drinking water ; Facilities ; India ; Large city ; Madras ; Sanitation improvement ; Town ; Urban administration ; Water ; Water supply ; Water use
  • 2002
  • Calcutta ; Drinking water ; Health ; India ; Risk ; Water ; Water quality ; West Bengal
  • 2002
  • Adrar ; Algeria ; Arid area ; Drinking water ; Hydraulic works ; Irrigated area ; Irrigation ; Irrigation system ; Oasis ; Palm plantation ; Sahara ; Urbanization ; Water economics ; Water supply ; Water use
  • 2002
  • Implications of shifts in the Israeli water discourse for Israeli-Palestinian water negotiations
  • Discourse ; Environment ; Geopolitics ; Groundwater ; Israel ; Security ; Water ; Water management ; Water needs ; Water resources
  • The paper analyzes the shifts in the internal Israeli water discourse. It argues that despite the immutable water policy scene within Israel, the previous unison discourse has fragmented in the last decade as a result of structural changes
  • 2002
  • Catskill Mountain water ressources : vulnerability, hydroclimatology, and climate-change sensitivity
  • Climatic variation ; Hydrology ; Interannual variability ; Model ; Mountain ; New York State ; Precipitation ; Seasonal variation ; Snow ; United States of America ; Vulnerability ; Water balance ; Water resources ; Water supply ; Watershed
  • The AA. present an initial assessment of the potential impact of climate change on water supply in the Metropolitan East Coast (MEC) region of the U.S. National Assessment of the Potential Consequences of Climate Variability and Change. A version
  • of the Thornwaite water-balance model is applied to one of six basins in the Catskill Mountains that together provide water for approximately 10 million people in New York City and other municipilaties. In addition to Thornwaite's original soil moisture reservoir
  • , the model includes the snow pack water reservoir of Willmott, Rowe, and Mintz (1985), a ground-water storage term, and several additional modifications.
  • 2002
  • Hydrology ; Model ; South Africa ; Water ; Water cycle ; Water management ; Water resources
  • Finding solutions to the many water resource utilisation problems that face South Africa has been the driving force behind a large part of the hydrological research that has been undertaken in the country. The changing face of South Africa
  • and the requirements of managing water in a transformed, democratic society have made the need for cooperation across various discipline even more essential. - (AJC)
  • 2002
  • Spatial patterns of water surface topography at a river confluence
  • Canada ; Channel geometry ; Confluent ; Fluvial dynamics ; Numerical model ; Quebec ; Runoff ; Spatial analysis ; Stream ; Surface water ; Turbulence
  • The AA. examine the spatial patterns of both the average and standard deviation of water surface at an asymmetrical confluence at different flow stages. This has required the development of a new methodology to obtain reliable field data on very
  • small changes in water surface height. These results are interpreted with respect to visual observations of the flow structures. Simulated water surface topography from three-dimensional numerical modelling is also compared with the detailed field
  • 2002
  • An ecosystem approach for determining environmental water allocations in Australian dryland river systems : the role of geomorphology
  • Arid area ; Australia ; Ecosystem ; Flood ; Habitat ; Hydraulic works ; Stream ; Water management ; Water needs ; Water resources
  • ecological processes; hydrological analyses in which the key hydrological signatures of the river are identified and the impact of water resource development on these is determined; and the derivation of a water management decision tree that enables managers
  • to allocate water to consumptive users during individual flood events. This ecosystem approach is outlined for the Condamine-Balonne River, a large dryland system in Australia.
  • 2002
  • A comparison of moisture scalars and water budget methods to assess vegetation-site relationships
  • Beech ; Biogeography ; Digital elevation model ; Habitat ; Index ; Methodology ; Ohio ; Soil moisture ; United States of America ; Vegetation ; Water budget
  • This study compares 3 approaches, a water-budget approach, and field-based and map-based moisture scalars, in their ability to predict the occurrence of a single species, American beech (Fagus grandifolia), observed in 102, 0.04 ha plots in SE Ohio
  • . It concludes that a water-budget approach is applicable to a wide range of studies exploring vegetation-site linkages, and in terms of global change, this approach offers the additional benefit of being a dynamic model.
  • 2002
  • Effect of depression storage capacity on overland-flow generation for rough horizontal surfaces : water transfer distance and scaling
  • Infiltration ; Model ; Overland flow ; Rainfall simulation ; Rill wash ; Roughness ; Runoff ; Soil erosion ; Water erosion ; Watershed
  • This paper presents a simple understanding-oriented model based on the conditioned-walker technique. This model simulates overland-flow triggering, i.e. the development of water transfer among depressions and to the runoff boundary. By the use
  • of relevant measurements, the paper intends to provide further understanding about the control of overland-flow by the surface roughness due to the storage of water by depressions.
  • 2002
  • Aquifer ; Asia ; Coastal environment ; Groundwater ; Overexploitation ; Palestine ; Salinisation ; Water management ; Water pollution ; Water resources
  • The Gaza Strip coastal aquifer is affected by increasing salinity and falling groundwater levels. Several authors believe these processes are related to the increasing water demand in the Gaza Strip corresponding to population growth during the past
  • few decades. According to this model, aquifer overexplotation will trigger seawater intrusion. In this paper, a new mechanism is proposed for the water pollution, and guidelines for water management are presented. It has been suggested
  • that there is a highly mineralized water inflow from the northern Negev area, through a preferential drainage axis. - (NF)
  • 2002
  • Germany ; Pollution ; Saxony ; Surface water ; Urban area ; Water ; Water quality
  • 2002
  • Active layer ; Andes ; Argentina ; Arid area ; Geophysics ; Glacier ; Meltwater ; Rock glacier ; Seismic method ; Water resources
  • This paper reports results of the application of combined refraction and geoelectric geophysical methods to the study of the El Paso rock glacier in the arid Andes of Argentina. The geophysical results permit a first estimate of the volume of water
  • enclosed in the rock glaciers of this region, indicating that locally, rock glaciers are important water resources. However the incidence of water availability to the arid lowlands is unknown.
  • 2002
  • The impact of informal living conditions on water quality in the Bloemfontein Municipality
  • Free State ; Informal settlement ; Living conditions ; Pollution ; South Africa ; Urbanization ; Water quality
  • in a developing community live and the implications that this has on the quality of the water resources were identified by means of a field survey in the study area. - (AJC)
  • 2002
  • Changing water quality in the Czech part of the Elbe catchment area in the 1990s. Twelve years of cooperation of Czechs and germans on the river Elbe
  • Alluvial plain ; Czech Republic ; Elbe ; Germans ; International cooperation ; Stream ; Water quality ; Years 1990-99
  • water quality were introduced during the cooperation of Czech and German geographers and academic institutions. - (MS)
  • 2002
  • The mean annual temperature at the top of permafrost, the TTOP model, and the effect of unfrozen water
  • Freezing ; Model ; Periglacial features ; Permafrost ; Soil properties ; Soil temperature ; Soil water ; Thermal regime
  • The effect of unfrozen water content on the thermal properties of the ground is discussed in the context of the TTOP model. Numerical simulations of the thermal regime for a range of fine-grained soils are used to determine the effect of variable
  • 2002
  • Evaluation of water quality pollution indices for heavy metal contimation monitoring. A study case from Akpabuyo-Odukpani area, Lower Cross River Basin (southeastern Nigeria)
  • Geochemistry ; Heavy metals ; Index ; Nigeria ; Pollution ; Surface water ; Water quality
  • 2002
  • Soil erosion under different rainfall intensities, surface roughness, and soil water regimes
  • Soil pattern as a key controlling factor of water erosion. Special issue
  • In this study, the results of a series of experiments are reported, summarizing the soil loss and runoff response from a 0.6x3.75 m area to different rainstorm regimes, slope steepnesses, subsurface soil water pressures, and surface roughnesses
  • under controlled laboratory conditions using a flume and rainfall simulator as water applicators, and a laser microreliefmeter and tensiometric system as soil response measuring devices. The soil chosen was a highly erodible Grenada loess. Discussion
  • 2002
  • Modelling the interactions between soil surface properties and water erosion
  • Soil pattern as a key controlling factor of water erosion. Special issue
  • Concept ; Model ; Rill wash ; Sediment transport ; Soil ; Soil erosion ; Soil properties ; Spatial variation ; Threshold ; Water erosion
  • This paper explores developments with respect to one set of processes : the interactions between overland flow, water erosion and surface microtopography. This theme is being explored through research in a number of related erosion models, which
  • 2002