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基于景观生态法的彭州市湔江河谷乡村旅游规划研究 总被引:1,自引:0,他引:1
通过分析现阶段彭州市湔江河谷地区开展乡村旅游的综合条件和存在的问题,应用景观生态规划的理论和方法提出湔江河谷地区旅游发展的总体方向,进行生态景观要素布局,设计了三种景观斑块类型和二种景观廊道类型,构建了湔江河谷地区“一核、两轴、三叶、四区”结构,并在此基础上规划了旅游项目和景观,以期为湔江河谷地区乡村旅游开发提供依据。 相似文献
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土地利用/土地覆盖是生态环境系统的组成部分,它的变化是区域生态环境演变的直接反映和结果,它是区域生态环境演变的一个重要因素。运用RS/GIS技术,采用土地利用类型覆盖率作为评价因子,参考国际和国内各省的土地利用类型覆盖率制定评价标准,对伊犁河谷生态环境进行模糊综合评价。得出伊犁河谷生态环境质量属"优"的面积覆盖率占伊犁河谷总面积的73.2%;生态环境质量为"良"的县市面积覆盖率占伊犁河谷的26.3%。伊犁河谷生态环境总体较好,局部较差。伊犁河谷各县市的耕地面积覆盖率、建设用地覆盖率和草地面积覆盖率是各县市生态环境状况差异的主要原因。该方法与其他方法比较,所得的评价结果比较一致,结论符合实际状况,且有计算简便快捷等优点,方法可行,具有一定的可靠性和理论价值。 相似文献
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利用两个时期的Landsat TM/ETM遥感影像,结合RS和GIS技术,直接从遥感图像上获得景观格局指数,对安徽省合肥市的景观格局进行了分析。揭示在快速经济发展和不断加快的城市化进程中,合肥市景观形状指数、分形维数和破碎度指数的不同变化趋势。与传统方法相比,该方法具有快速、准确、节省费用、简单易行的特点,有利于对景观格局变化进行动态监测。 相似文献
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黑水河干旱河谷沿程土壤物理参数梯度变化特征研究 总被引:1,自引:0,他引:1
横断山区干旱河谷是具有典型的旱季和雨季的特殊气候特征的区域,本区域土壤退化和荒漠化极大制约了区域农业的发展。本文研究了金沙江干热河谷区支流黑水河从源头到河口未扰动土壤的物理参数变化特征。结果表明,沿河土壤物理呈现不同变化趋势,砾石在中游部分河段和河口段高,而〉5mm团聚体的变化则相反;5~1mm的团聚体变化不大;〈1mm团聚体河口和源头段高于其余地段;土壤容重沿程增大,非饱和导水率源头地段土壤最高。本研究初步揭示了干旱河谷土壤不均匀,不同水热条件及其组合可能对退化程度有至关重要的影响。这表明横断山区不同的干旱河谷地段土壤和植被退化途径、退化特征和退化过程不同,开发和治理途径与方式也应当不同。 相似文献
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Key Elements of Landscape Pattern Measures 总被引:9,自引:0,他引:9
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Assessing Impacts of Typhoons and the Chi-Chi Earthquake on Chenyulan Watershed Landscape Pattern in Central Taiwan Using Landscape Metrics 总被引:2,自引:1,他引:2
The Chi-Chi earthquake (ML = 7.3) occurred in the central part of Taiwan on September 21, 1999. After the earthquake, typhoons Xangsane and Toraji produced
heavy rainfall that fell across the eastern and central parts of Taiwan on November 2000 and July 2001. This study uses remote
sensing data, landscape metrics, multivariate statistical analysis, and spatial autocorrelation to assess how earthquake and
typhoons affect landscape patterns. It addresses variations of the Chenyulan watershed in Nantou County, near the earthquake’s
epicenter and crossed by Typhoon Toraji. The subsequent disturbances have gradually changed landscape of the Chenyulan watershed.
Disturbances of various types, sizes, and intensities, following various tracks, have various effects on the landscape patterns
and variations of the Chenyulan watershed. The landscape metrics that are obtained by multivariate statistical analyses showed
that the disturbances produced variously fragmented patches, interspersed with other patches and isolated from patches of
the same type across the entire Chenyulan watershed. The disturbances also affected the isolation, size, and shape-complexity
of patches at the landscape and class levels. The disturbances at the class level more strongly affected spatial variations
in the landscape as well as patterns of grasslands and bare land, than variations in the watershed farmland and forest. Moreover,
the earthquake with high magnitude was a starter to create these landscape variations in space in the Chenyulan watershed.
The cumulative impacts of the disturbances on the watershed landscape pattern had existed, especially landslides and grassland
in the study area, but were not always evident in space and time in landscape and other class levels. 相似文献