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R. H. F. Curr A. Koh E. Edwards A. T. Williams P. Davies 《Journal of Coastal Conservation》2000,6(1):15-22
The Mediterranean region plays host to ca. 33% of the world’s tourism industry. This population of visitors (ca. 147 million
in 1990) inevitably exerts an enormous impact on the natural resources of this coastal zone. In May 1997, a new generation
Aerial Digital Photographic System [ADPS] configured with a Kodak Digital Science 460 CIR digital camera was used to acquire
colour infrared digital photographs of the sand dune systems along the Mediterranean coast of France, from Le Barcares to
St-Cyprien-Plage. These have been used to assess the condition of the dunes along this coast. A series of simple analytical
techniques to identify and measure features indicative of public pressure using image processing software has been devised.
The dune manager with basic computer skills can analyse such indicators as path length, vegetation cover (and conversely the
extent of bare sand) to enable monitoring of the performance of their dune systems under particular management regimes. These
photographs have been compared with similar digital photographs of dune sites in SW France to allow a comparison of dune degradation
in a region with a different population pressure and climate regime. Dune systems sampled from the Mediterranean coastal zone
showed more evidence of anthropogenically induced change than those sampled in SW France. 相似文献
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在分析多区蜂窝CDMA系统干扰的基础上,提出了开,闭环结合的功控方式,要求和以载干比(CIR)为基础的功控算法,从而抑制干扰,改善系统性能,增加系统容量。 相似文献
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Lars T. Waser Meinrad Kuechler Markus Schwarz Eva Ivits Silvia Stofer Christoph Scheidegger 《Environmental Modeling and Assessment》2007,12(4):315-328
The present study focuses on developing models to predict lichen species richness in a UNESCO Biosphere Reserve of the Swiss
Pre-Alps following a gradient of land-use intensity combining remote sensing data and regression models. The predictive power
of the models and the obtained r ranging from 0.5 for lichens on soil to 0.8 for lichens on trees can be regarded as satisfactory to good, respectively. The
study revealed that a combination of airborne and spaceborne remote sensing data produced a variety of ecological meaningful
variables. 相似文献
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