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  • In this paper, 3 geostatistical algorithms (simple kriging with varying local means, kriging with an external drift, colocated ordinary cokriging) are introduced to incorporate an exhaustive secondary information (digital elevation model
  • ) into the spatial prediction of rainfall erosivity. The techniques are illustrated using annual and monthly rainfall data from the Algarve region in Portugal. Cross validation is used to compare the prediction performances of the 3 geostatistical interpolation
  • 1999
  • In this study, sample weights collected by 3 types of pressure-difference samplers are compared to determine whether differences are statistically significant. The implication of the results is that measured transport rates will vary depending
  • flow records and used to estimate annual yield. Discussion of the results.
  • 1999
  • Analyse de l'évolution des concentrations en aérosols, ozone et oxyde de carbone. La concentration en gaz varie brutalement. Le signe du changement est déterminé par la direction du mouvement du front. L'amplitude varie de 20 à 65% et dépend du type
  • 1999
  • , respectively, due to impacts of varying degrees from slope runoff.
  • 1999
  • on the sensitivity of hypsometry to different Digital Elevation Model (DEM) resolutions and on the influence of drainage area. With their results, the AA. propose that the scale dependence may reflect the varying importance of river and hillslope processes with basin
  • 1999
  • recent geological investigations. The only parameter allowed to vary within this inverse procedure is the model's paleoclimate (surface air temperature and accumulation). Thus, model results indicate the thickness and dynamics of the ice sheet over
  • 1999
  • leurs lieux de stationnement, grâce auquel elles exploitent et contrôlent les parcours pastoraux, ne varie guère au cours de l'année, ni d'une année à l'autre. - (JPB)
  • 1999
  • Les degrés de solvabilité des Etats des Etats-Unis, des Länder allemands et des oblasts russes sont évalués selon différents principes juridiques, dont le poids implicite varie largement en fonction du cadre institutionnel spécifique et des valeurs
  • 1999
  • The ablation rate under a debris layer is very difficult to measure directly at debris-covered glaciers, because the surface is highly heterogeneous, and the ablation rate varies tremendously from place to place. This paper describes previous works
  • 1999
  • change indicates that most glaciers are close to or varying around a quasi-steady state.
  • 1999
  • but dry regions can be explained by thermal stress/shock. Differential radiation receipts on slopes of varying orientation and gradient can exert a very strong effect.
  • 1999
  • experiment, but initial slope of the bed varied from 1% to 10%. The slope of the sediment deposit downstream of the migrating headcut was 2.2% for all experiments, and suggests that flow discharge and not the initial slope of the bed controlled transport
  • 1999
  • the region. These are of regionally varying attitude towards the region. These are of regionally varying marked degrees. For a successful marketing it seems to be sensible to reinforce the integration of regional-referring attitude dimensions. - (L'A.).
  • 1999
  • La productivité de l'agriculture varie de manière considérable selon les différentes régions du monde. L'A. se demande si la productivité du travail a convergé au cours des 20 dernières années, quels facteurs influencent la croissance du secteur
  • 1999
  • of the erosional response varies with land use, vegetation type and climatic regime.
  • 1999
  • The Loess Plateau-Northeastern Tibetan Plateau in China is famous for its deep and continuous distributed loess, in which soils (developed from loess) vary gradually with different biological climates changing from subhumid to arid, which provide
  • 1999
  • , red clay, low hills; both Jixi County, Anhui Province and Wuhua County, Guangdong Province, weathered granite, mountain regions. It was showed by comparing maps of land degradation between the 1950s and the 1980s that changes of land degradation varied
  • 1999
  • Five different algorithms for calculating slope from digital elevation models (DEMs) have been compared from regional to global scales. The most significant outcome is that slope varies inversely with the DEM grid size. Thus, slopes estimated from
  • 1999
  • The particle size of the bed sediments in or on many natural streams, alluvial fans, laboratory flumes, irrigation canals and mine waste deltas varies exponentially with distance along the stream. A plot of the available worldwide exponential bed
  • 1999
  • By some measures, the role of humans in shaping the landscape is now greater than that of any other geomorphic agent. This effect varies spatially. In the United States, it is greatest in the east where population density is highest
  • 1999