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Résultats de la recherche (232 résultats)

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  • The effect of slope on interrill erosion at short slopes
  • This study was conducted to investigate the effect of slope gradient on soil erosion and determine the splash contribution to interrill erosion at short steep slopes. An experimental device was used to make simultaneous measurements of interrill
  • 2011
  • Silver bullet or Trojan horse ? The effects of inclusionary zoning on local housing markets in the United States
  • Boston ; Housing ; Housing cost ; Housing market ; Induced effect ; Land use ; Regulation ; San Francisco ; United States of America ; Urban area ; Zoning
  • 2011
  • Vegetated filter effects on sedimentological connectivity of agricultural catchments in erosion modelling : a review
  • and modelling aspects; and second, to critically review how present-daywater erosion models take anthropogenic structure (including vegetated filter) effects into account.
  • 2011
  • and synergies associated with a particular transport investment. The results indicate the statistical significance of scale effects of transport investment, substitution effects of road investment on other types of transport investment, and political factors
  • 2011
  • Scale effects of the continental coastline of China
  • effects with fractal dimensions of coastline have significant differences according to uplift and subsidence segments along the continental coastlines of China; the fractal dimension of coastline has significant spatial heterogeneity according
  • to the coastline types. The length of rocky coastline is affected by scale more than that of muddy and sandy coastline. Since coastline is the conjunction of sea, land and air surface, the study of coastline scale effect is one of the scientific bases
  • 2011
  • Climate change and its driving effect on the runoff in the Three-River Headwaters region
  • the precipitation and the potential evaporation have positive and negative effects on runoff relatively, fluctuated characteristics of individual effect on the runoff depth in specific situations are represented.
  • 2011
  • The effect of river floods on the morphology of small river mouths in the southeastern Mediterranean
  • This study examines the effect of floods on the dynamic morphology of 7 of these river mouths between 1918 and 2005. The methodology is based on GIS techniques and utilizes over 300 aerial photographs from which detailed geomorphologic mapping
  • of river mouths and nearby geomorphologic elements was performed. River discharge records were incorporated into a database, permitting analysis of the effect of floods on the morphology of the river mouths. Based on their adjacent topography, 2 types
  • 2011
  • Assessment of the geomorphic effects of large floods using streamgage data : the 1951 floods in eastern Kansas, USA
  • Data from 23 U.S. Geological Survey (USGS) streamgages were analyzed to assess the geomorphic effects (short-term change and subsequent recovery) of the record 1951 floods on streams in eastern Kansas. Flood-related, channel-bed elevation change
  • is a potentially useful technique for assessing the geomorphic effects of a large flood at a site, provided that the gage has a long period of record and is located on an alluvial channel.
  • 2011
  • Effects of soil erosion on long-term soil productivity in the black soil region of northeastern China
  • China's northeastern Black Soil Region, one of the country's most important crop production areas, has been seriously affected by soil erosion. This study evaluated the effects of soil erosion on the long-term productivity of this region. The AA
  • . used a modified productivity index (MPI) model to assess the current effects of soil erosion on soil productivity, as well as to predict long-term change in productivity. The model predicts a 9.6% productivity reduction over 100 years and a 48.3
  • 2011
  • Effect of vegetation coverage on aeolian dust accumulation in a semiarid steppe of northern China
  • The AA. conducted a field experiment to investigate the effects of vegetation coverage on airborne dust accumulation and evaluated effects of dust input on the contribution of nutrients to vegetation-mulched fields. Five vegetation coverage
  • 2011
  • Investigations were conducted at the Hilton Experimental Site, east Shropshire, within the southern section of the Worfe catchment, a tributary of the mid-Severn. The effectiveness of employing palm-mat geotextiles (from Borassus palm of West Africa
  • and Buriti palm of South America) for soil erosion control under field conditions on arable loamy sands was investigated. Borassus buffer strip, Buriti buffer strip and Borassus completely-covered plots had similar effects in decreasing runoff voluume
  • and soil erosion. Although buffer strips of Borassus mats were as effective as whole plot cover of the same mats, the longevity of Borassus mats was nearly twice that of Buriti mats. Thus, use of Borassus mats as buffer strips on bare plots is highly
  • effective for soil erosion control.
  • 2011
  • Effects of vegetation restoration on soil organic carbon sequestration at multiple scales in semi-arid Loess Plateau, China
  • Geographic Information System. The results showed that cropland transforming to grassland or shrubland significantly increased SOC at patch scale. The results have demonstrated general positive effects of vegetation restoration on SOC sequestration
  • at multiple scales. However, soil erosion under rugged topography modified the spatial distribution of the SOC sequestration effects.
  • 2011
  • Effect of fire severity on water repellency and agregate stability on Mexican volcanic soils
  • The aim of this research is to study the effects of wildfires of different fire severity on the occurrence and degree of water repellency and aggregate stability in burned volcanic soils under pine and fir forests in the State of Michoacán (central
  • Mexico). In order to achieve this, three low severity and two high severity burned sites in different fire-affected areas were selected and compared with two long-unburned control sites. The effects of the different severity fires on [1] soil organic
  • 2011
  • Between 1997 and 2006, 43,423 environmental impact assessment (EIA) applications were submitted in South Africa. This exceptionally high number reflects a particular weakness in the ability of the EIA system to effectively screen EIA applications
  • . The 2006 regulations intended to reduce the number of applications by 20%. This paper presents a comparative analysis of screening performance before and following the 2006 regulations in order to determine the improvement of screening effectiveness since
  • 2011
  • The effects of collateralizable income and debt overhang on entrepreneurial investment in an open regional economy
  • 2011
  • The inverse sovereignty effect : aid, scale and neostructuralism in Oceania
  • 2011
  • Effects of precipitation and temperature on crop production variability in northeast Iran
  • 2011
  • The effect of Antarctic sea ice on the Southern Hemisphere atmosphere during the southern summer
  • 2011
  • An analysis of changing land use pattern and its effect on Umtrew Basin, Northeast India
  • 2011
  • Weathering mechanisms and their effects on landsliding in pelitic schist
  • 2011