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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland, wild grassland and a flood plain in the Yongding River sandy land in Beijing.
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The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain.
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3) The mechanical composition of sand particles consisted mainly of silver sand in the flood plain and sparse wild grassland, and of silver sand, particle silver sand and floury sand in other land-use types.
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Given these facts, some management measures for conservation and restoration of the riparian forests are proposed, including the establishment of riparian forest buffer belt, bank stabilization measures, and maintenance of flood protection.
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Forest harvesting could also significantly increase the peak flood and snowmelt runoff.
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Influence of floods on natural riparian forests along the Ergis River, west China
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The study of the influence of floods on the natural riparian forests is imperative for the understanding of the successional process and the acceleration of conservation and restoration of forests.
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Dynamics of underground water of Delta or Island territories during passage of floods
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The dynamics of underground water, hydraulically connected with rivers, is investigated during the passage of floods in the rivers.
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Model Study of Migration Behavior in Floods of 241Am and 152Eu Associated with Humus Compounds in Floodplain Soils of the Yenise
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3) The mechanical composition of sand particles consisted mainly of silver sand in the flood plain and sparse wild grassland, and of silver sand, particle silver sand and floury sand in other land-use types.
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The set of species here included both representatives of watershed and typical aquatic forms present due to the flood conditions of a given area.
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Lighthill and Whitham [6] discovered that for Froude numbers greater than two, the linear theory led to unlimited growth in the intensity of the flood wave.
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To adapt to flooded conditions, some trees overcome the flood period by dormancy accompanied by defoliation and formation of annual rings in the wood.
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Adaptation of the photosynthetic apparatus of the immature broadleaf trees to the flood-plain conditions
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This system of equations also makes it possible to investigate undamped jumps of the floodwater wave type.
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This can be explained by the regular flooding of the foots of the mounds with floodwater and the capillary rise of water.
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Soil water depletion following rapid drainage for blocks receiving relatively high, medium and low volumes of floodwater were 809.6, 312.4, and 203.1 mm, respectively, for a 150-day period.
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All these factors prohibit rapid discharge of floodwater and make the flood regimes here extremely sensitive to the sea level rise.
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Lixiahe region is one of the susceptible area to flood and waterlogging disasters in China due to its low topographic relief and having difficulty in draining floodwater away.
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