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The variation tendency of river runoff,precipitation and temperature over drainage areas of the major rivers in Qinghai province was analysed by using nearly 38 years observative data.

通过分析近38年青海省主要河流径流量及其流域降水、气温的变化趋势,着重研究了干旱气候对青海地表水资源的影响。

The spatial planning on the watershed may help implementing ecosystem management. The related concepts applied in the planning included the model, advocated by Odum regarding the environments that human need, ecosystem classification, landscape ecology and ecological integrity, etc.

本研究的流域空间规划能帮助生态系统管理的实行,而规划所用的观念,包括:Odum提出的四种人类需求环境模型、生态系统分类、地景生态学以及生态完整性等。

They were first active in the Selenga and Orkhon river basins, and later moved to the north of the Tura River.

最初活动于色楞格河和鄂尔浑河流域,后迁居土拉河北。

The main conclusions are the following:1 It is a effective means that making use of the high resolution remote sensing imagery has quickly and dynamically investigated and monitored the land use type ofRed Water River, and has carried through the four grades of classification, and its result has achieved the precision requirement of the minimum area of obvious land use type (cultivated land, field, economic forest) less than 9 pixel of imagery, area precision 9~27 pixel and 0.33 hectares.2 It is a high-efficient and feasible means that making use of the digital managing technology of wave band merging, precise geometry correction, imagery merging, imagery strengthening, imagery cut out and inlay, and making the orthograph, etc, and observing on the spot to data analysis, it has carried on people-computer interactive screen translating to the remote sensing imagery data of high resolution by using many kinds of geographical information systems soft ware.

主要结论如下: 1 利用高分辨率遥感影像进行快速、动态调查与监测红水河流域土地利用类型,并将土地利用类型进行到四级分类,达到重点地类图上最小面积9个像元,面积精度9~27个像元、1.5亩的精度要求,是一种行之有效的方法。

Three main methods with lacustrine carbonates have been used to reconstruct the lake water palaeo-temperature at present. First, the technique of isotopic geological thermometer, since being put forward to reconstruct sea-water paleo-temperature, was subsequently introduced into lacustrine carbonate sediments for constructing lake-water based upon the function relationship between lake-water temperature and the oxygen isotopic compositions of lacustrine carbonate and lake-water. Second, paleo-temperature of the lake-water can be reconstructed by determining Mg/Ca values of the lacustrine ostracode shells. And third, paleo-temperature of the lake-water can be reconstructed based upon the statistic model between the oxygen isotopic composition of lacustrine carbonate and the Lake-water temperature by testing the modem hydrogeological parameters and some relevant isotopic data of the lake basin.

目前利用湖泊碳酸盐对湖泊古水温进行重建主要有三种方式,一是运用同位素地质温度计原理,利用水温与湖泊碳酸盐氧同位素值和湖水氧同位素值三者之间的函数关系,对湖泊古水温做定量研究;二是通过测定介壳[Mg(上标 2+)]/[Ca(上标 2+)]进而重建古水温;三是通过测定湖泊流域范围内现代水文气象参数及一些相关的同位素资料直接建立起湖泊自生碳酸盐氧同位素值与温度间的统计模型。

At the same time, the regional unbalance of the ecological importance and the forest resources distribute resulted in the difference environment cost that every region should bear and the contradiction between the development and underdevelopment region and the different region in the same watershed outstood.

总之,从中国的林业分类经营理论和实践两方面看,商品林和公益林生态服务价值评价和补偿问题成为要解决的首要问题。本文探讨了森林生态服务价值的计量并构建了公益林与商品林生态服务价值补偿机制,最后以闽江流域为实例进行了森林生态服务价值补偿机制的研究,对林业分类经营有一定的理论与实践意义。

Inner Mongolia region in the late Palaeolithic two years ago, there Ordos people, living in the Yinshan mountains and Salawusu River valley; in Inner Mongolia region along the Yellow River also found a large number of Yangshao and Longshan cultural sites.

内蒙古地区在2万年前的旧石器时代晚期,已有鄂尔多斯人,生活在阴山山脉和萨拉乌苏河流域;在内蒙古地区黄河沿岸还发现有大量的仰韶文化和龙山文化遗址。

By using paleosols, the history of ancient paleoclimate change might be reconstructed while variation of atmospheric pressure of oxygen and level of carbon dioxide concentration during preCambrian and postCambrian periods, as well as paleoecological, paleogeographic features and paleolandscape were rebuilt. However, several problems should be tackled, e.g.

形成于晚第三纪以前的古土壤可以重建全球范围的古气候变化历史,同时揭示前寒武纪时期古大气O2分压以及后寒武纪时期古大气CO2浓度水平的演化过程;古土壤具有空间和时间等多重信息,能反映流域或区域的古景观、古地貌、古水文特征。

Results showed these varieties were characterized by late matured, high plant height and panical neck length, low spikeletes density and yield per plant.

结果表明,晚熟、株高和穗颈长偏高、着粒密度和产量偏低为太湖流域糯稻地方品种的主要特征。

Principal component analysis showed the first five PCs explained 70.4% variation in total germplasms, and seven traits, spikeletes per panical, filled grains per panical, spikeletes density, panicals per plant, plant height, 1000-grains weight and yield per plant, were important traits in explaining variation of these germplasm because of theirs high vector loadings.

主成分分析显示,PC1-PC5能够解释总体70.4%的变异,而每穗总粒数、每穗实粒数、着粒密度、单株有效穗、株高、千粒重、单株产量等7个性状因具有高的特征向量值,为分析太湖流域糯稻地方品种资源的重要性状。

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