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The success of ecological recovery depends on the plants selection. The thirty-one typical sample plots were selected along Wushen road at different elevation in this article. The trees, shrubs, and grasses of the thirty-one typical sample plots were investigated in winter and spring detailedly. And the main plant kinds were obtained. The composition of plants and common plants were analyzed at different...
Sandy prairie over-grazing and tourism passengers directly to forage, soil was trampled damages the soil compaction, the original structure and some physical properties, causing damage to vegetation growth environment, cannot normal growth, grassland phenomenon also increasingly serious soil erosion, so through investigation the soil quality, tourist traffic control etc. In order to research the tourism...
The concrete cut-off wall is a key technology, which applied in preventing seepage in the large depth complicated strata foundation. In Tibetan Zhikong hydropower station foundation engineering, including of the alluvial sand gravel, ice accretion sand gravel, ice-water sand gravel, floating rock and sand layer, the in situ constructing tests of excavating, concreting under water and connecting of...
In order to analyze the order and complexity of land resource utilization in Loess Hilly and Gully region, based on dissipative structure theory, the entropy exchange model were set up which according to the characters of utilizations of land resource in Loess Hilly and Gully region. Three types of information entropy were constructed, including protection and harness, production and environment entropy...
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