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植被覆盖状况
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  vegetation cover condition
     The changes of environment in Baiyangdian not only relate to its conditions of natural, economical and social, but also refer to the water resources exploitation and the vegetation cover condition in upriver, and the changes of landscape pattern all over the watershed.
     白洋淀的环境演变,不仅涉及到淀区本身的自然、社会和经济条件,而且与上游的水资源开发、植被覆盖状况、水土流失情况以及整个流域的景观格局变化都有很密切的关系。
短句来源
     In this paper, the effects of vegetation cover condition on formation and evolution of mountain-valley wind are studied by utilizing three-dimensional soil - vegetafion- atmosphere coupled regional climate model. The results show that vegetation cover condition not only have effects on wind velocity and circulation strength, but also on formation and persistence of mountain-valley circulation.
     本文利用三维土壤一植被一大气耦合的区域气候模式模拟分析植被覆盖状况对山谷风环流形成与演变过程的影响,结果表明,植被覆盖状况不仅影响风速大小和环流强弱,而且对环流的形成和维持也有很大影响。
短句来源
     Accurate and rapid monitoring of vegetation cover condition is a key factor in ecological restoring and building of river catchment.
     快速、准确的获取流域植被覆盖状况信息是进行生态恢复与建设的重点。
短句来源
  “植被覆盖状况”译为未确定词的双语例句
     The vegetation attribution is good and the percentage of high vegetation fraction is improved from 71.6% to 76.5%.
     长汀县的植被覆盖状况比较好,高植被覆盖面积(植被覆盖度>0.8)占国土面积的比例从71.6%提高到了76.5%。
短句来源
     According to the δ~(13)C value of C_3, C_4 plant and river suspended matter, we can discern the state of plant covered in different water and soil loss area.
     C_3、C_4植物及悬浮物的δ~(13)C值区分不同流域的植被覆盖状况;
短句来源
     Q_(10) values of all communities were between 2.16~4.92, Picea crassifolia forest at altitude 2750 meters had higher Q_(10) value than other communities, which implied that different vegetation condition could affect the sensitivity of soil respiration to temperature.
     不同植被类型的Q10 值介于2 16~4 92之间,青海云杉林(海拔2 75 0m)群落的Q10 值高于其它植被类型,说明不同的植被覆盖状况会影响到土壤呼吸对温度变化的敏感程度
短句来源
     This paper proves that the Microwave Polarization Difference Index(MPDI) can be used to indicate the vegetation coverage conditions with the AMSR-E L2A brightness temperature data product.
     以AMSR-E数据为例,研究证明了微波极化差异指数(MPDI)能够反映地表植被覆盖状况
短句来源
     SPOT-5 multi-spectral image has an ability to distinguish vegetation from other objects and to learn its spatial information;
     SPOT-5多光谱数据具备了提取小型海岛植被信息、掌握其植被覆盖状况的能力;
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  相似匹配句对
     Studies on soil nutrients under different vegetation types in the Ziwuling Area
     不同植被覆盖下子午岭土壤养分状况研究
短句来源
     Modeling of Impacts of Vegetation Coverage Change on Land Surface Conditions
     植被覆盖异常变化影响陆面状况的数值模拟
短句来源
     A Study on Soil Moisture Condition of Sand Land Under Different Vegetation in North of Zhangwu County
     彰武北部沙地不同植被覆盖下土壤水分状况研究
短句来源
     In addition,the permeability rate was mainly determined by condition of vegetation on the soil.
     植被覆盖情况影响渗透速率。
短句来源
     Vegetation distribution in coal cinder yard of Wuhu thermal power station.
     芜湖发电厂灰渣场植被状况
短句来源
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Matching filtering technique is one of the effective methods to enhance linear structures in computer processing of remote sensing images. The templates of different sizes and properties are used for convolution processing of images in order to detect the linear image features. Correct selection of template parameters has direct influence on the result and cost of image processing. In a conventional approach values of template element are variable with places and have to be tested with computer in each particular...

Matching filtering technique is one of the effective methods to enhance linear structures in computer processing of remote sensing images. The templates of different sizes and properties are used for convolution processing of images in order to detect the linear image features. Correct selection of template parameters has direct influence on the result and cost of image processing. In a conventional approach values of template element are variable with places and have to be tested with computer in each particular cases. On the basis of experiment it is suggested that apart from template feature, values of template element mainly depend on topographic relief (roughness of terrain surface) and vegetation cover in a studied area. A quantitative equation for selecting optimum parameters of matching-filtering-template for linear feature detection on remote sensing images is proposed.

本文认为:遥感图象的计算机数字处理中,检测线性影象特征效果的关键是匹配滤波模板参数的最佳选择。这主要与模板性质、所处理图象的地形起伏以及植被覆盖状况等关系密切,可用下式表示:当取-1≤b≤0时a=μ/H·K (1)效果最佳,式中a,b为模板元素;μ为模板因子;H为地表粗糙度,K为植被覆盖因子。当b取任意值b'时a'=1.5a+0.333b'~2 (2)也能取到较佳效果。式中a由式(1)计算。

Sand moving by wind on sandy soil is the primary reason for wind-drif-ting sand movement, and needs two basic conditions: one is intensive windable to carry grains, another is dry, loose soil surface with fine grains.Thepaper analyses the mechanical composition and structure of soil in BeijingPlain, points out that wind erosion and wind sand movement intensivelyoccur in the sandy belt relative to the ancient Yongding River. According tofield observation and tunnel experiments, the author considers that the soilstructure,...

Sand moving by wind on sandy soil is the primary reason for wind-drif-ting sand movement, and needs two basic conditions: one is intensive windable to carry grains, another is dry, loose soil surface with fine grains.Thepaper analyses the mechanical composition and structure of soil in BeijingPlain, points out that wind erosion and wind sand movement intensivelyoccur in the sandy belt relative to the ancient Yongding River. According tofield observation and tunnel experiments, the author considers that the soilstructure, dryness and tightness as well as vegetation coverage are main fac-tors to determine soil resistance to wind erosion. Finally, an attempt to evaluate soil resistance to wind erosin with antierosion factor content is madeand a sketch of resistance to wind erosion is attached.

土壤遇风起沙是风沙活动产生的最根本原因,它的基本点有二:一是具有足以使砂粒产生运动的一定强度的起沙风;二是土壤颗粒小、质地干燥疏松,具有遇风起沙产生运动的属性。本文分析了北京土壤的机械组成特征和结构性能等。叙述了在永定河边部一些地块的野外风沙观测和沙风洞试验,证实土壤结构性、干松程度、植被覆盖状况是决定土壤抗风蚀性能的三要素。最后,试用不易蚀因子含量评价北京平原土壤的抗风蚀能力。

Effect of plateau zokor (Myospalax baileyi) mounds in alpine meadow was investigated by determining the sinking tendency of mounds, coverage of mounds, change of the aboveground biomass of plant on mounds and soil nutrient concentrations at H-aibei Research Station of Alpine Meadow Ecosystem, Academia Sinica, 1990. The result showed that mounds were formed at a ratio of 243 mounds/year per zokor which were equal to 1023.82 kg of the dry mass of soil. The mounds would be sinking within one year.

本文研究了矮蒿草草甸上高原酚鼠土丘的出现率及其对植被的覆盖状况,土丘高度的下降及其直径的变化,土丘植物地上生物量和土丘营养元素含量。高原鼢鼠土丘出现率为242个/只/年,合土壤干重为1023.82公斤/只/年,对植被的覆盖面积高达22.53平方米/只/年。土丘在地表滞留时间约1年,处于不同演替阶段植被区域内出现的土丘,其植物地上生物量间的差异显著。5月前,在原生植被区出现的土丘,经4个月后,土丘边缘形成环状富草区,士丘边缘至中心区形成环状贫草区,而土丘中心仍处于无草状况。在次生植被区上的土丘则无此现象。新土丘除速效钾的含量与对照区无显著差异外,速效氮、磷的含量显著地高于对照区。旧土丘土壤中的速效氮、磷、钾含量均低于新土丘,但氮、磷的含量仍高于对照区。

 
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