Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Zhong-xiang Hao"'
Publikováno v:
Wuhan University Journal of Natural Sciences. 11:977-983
Taking Niyang River Basin as an example, applying with the indices of landscape pattern, the indices of ecological risk of ecosystems are calculated in this paper, which takes the value of ecological loss of main ecosystem as the evaluation standard
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:767-773
In the case study in Agricultural Area of Tibet, the process and characteristics of farmers' land use were surveyed by semi-structural interview questionnaire. By comparing the change of land covers and farmers' land decision in two periods, the spat
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:745-750
Based on the Tibet Autonomous Region's statistic yearbooks and the data from the two household surveys in 2002 and 2004, this paper has comprehensively analyzed the pattern of changes on the farmers and herdsmen's income sources in the Tibet Autonomo
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:694-700
It analyses theCastanopsis carlesii, Camellia oleifera andSymplocos laurina populations' status and role in theCastanopsis carlesii community basing on the study on the dominant population size structure, survival curve and dynamic. It reveals theCas
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:659-664
Characteristics of plant species diversity of two types of grassland communities (alpine meadow and alpine grassland) was examined and the relationship between species diversity and community dynamics was determined using GPS positioning and in situs
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:621-627
The sediment load and river sedimentation of the upper reaches of Yangtze River has been undergoing constant changes as complex landform, large mountain area and plentiful precipitation make the drainage area of Yangtze River very vulnerable to water
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:751-758
Focusing on the region of Yarlung Zangbo River and the middle reaches of its two tributaries of Nianchu River and Lhasa River in Tibet (Herefter referred to as the “One River and Two Tributaries” region), and based on the data from China 3rd, 4th
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:739-744
Focusing on the 18 counties along “One River and Two Tributaries” region, and based on the data from China 3nl, 4th and 5th population censuses, this article has analyzed the time and spatial changing patterns of the population in this region. Th
Publikováno v:
Wuhan University Journal of Natural Sciences. 10:628-634
Taking Tibet as an example, the functional essentiality degrees of water resources conserving of regions were discussed in this paper. At first, based on the status of regional vegetation, whether the region has the function of water conserving was m
Publikováno v:
Journal of Geographical Sciences. 14:41-46
Based on Universal Soil Loss Equation and methods of mathematics model and GIS analysis, this study classified influence of precipitation, soil, topography and vegetation upon sensitivity of soil erosion into five different degrees which are extreme