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Displaying 1381 - 1385 of 1605Controls on the phosphorus content of fine stream bed sediments in agricultural headwater catchments at the landscape-scale
There have been no landscape-scale assessments which quantify the relative importance of the organic and mineral properties of BS (bed sediment) and associated catchment characteristics (geology, land cover and mean topsoil phosphorus (P) content) for BSP concentration.
Temperature and Precipitation Suitability Evaluation for the Winter Wheat and Summer Maize Cropping System in the Huang-Huai-Hai Plain of China
The Huang-Huai-Hai Plain is the most important winter wheat and maize production region in China. In response to the increasing population pressure, the Chinese authorities strongly invested in improving the irrigation systems and increasing ground and surface water exploitation within the plain to increase the crop productivity. This resulted in a reduction of water resource availability and in turn indirectly affected the suitability of various agricultural ecosystems in the plain.
Characteristics of developers and their relations to open space conservation
Developers are entrepreneurs that initiate and carry out land development projects. They play an active dominant and leading role in land use planning decisions, and are, therefore, expected to have a significant impact on patterns of development and open space conservation. The present study identified correlations between characteristics of developers and indicators of open space conservation, based on a random sample of 88 statutory land use plans in the Tel Aviv metropolitan region over the period 1990–1999.
Effectiveness of land management measures to reduce coastal georisks, eastern Québec, Canada
Erosion and flooding are geohazards that pose a significant problem in eastern Québec, as they do throughout the world. To manage such risks, zoning to set limits on new construction projects is generally the first adaptation solution introduced in an area. However, very few studies have evaluated the effectiveness of zoning in terms of risk reduction. Offered here is a retrospective approach to evaluate the evolution of settlement in coastal areas before and during the progressive implementation of zoning laws and regulations in the Percé region of eastern Québec, Canada.
Assessing the effect of broadleaf woodland expansion on acidic dry deposition and streamwater acidification
The study aim was to determine whether enhanced dry deposition of acidic atmospheric pollutants by broadleaf woodland expansion could increase the potential for acidification of surface waters in acid-sensitive areas. Dry sulphur (S) and nitrogen (N) deposition was modelled with the Fine Resolution Atmospheric Multi-pollutant Exchange (FRAME) model using a roughness length value calculated specifically for birchwoods.