查询词典 desertification

Desertification is land degradation occurs in arid, semi-arid and subhumid regions, which is one of the he environmental problems human society generally concerned in the context of global change, has a direct relationship with the survival and development of their own humanity.

沙漠化即发生在干旱、半干旱及半湿润干旱地区的沙质荒漠化，是全球变化背景下，人类社会普遍关注的环境问题之一，与人类自身的生存和发展有着直接的关系。

Modern approach methods of geography, ecology, quantitative analysis, expert integration, remote sensing image analysis and geographical information system were combined to reveal the matters in this paper. The eco-geographical background of the research area and the research work studied by other scholars were comprehensively expatiated. The temporal and spatial variation of precipitation and soil moisture, vegetation and soil distribution, and land use/land cover were compared as well. On the basis of foregoing analysis, the eco-geographical differentiation was discussed. According to principles and indicators, with extension engineering method and integrated analysis, the physical geography boundary between subhumid and semiarid areas were demarcated. By using remote sensing image analysis, wavelet analysis of the perennial precipitation and temperature, and the comparison of temporal and spatial variation of the desertification, this paper accounted for the regional response to global environmental change and suggested the dominant environmental problems.

本文采用了地理学与生态学相结合、定量分析与专家集成相结合、遥感图像解译和地理信息系统相结合的方法，对研究区的生态地理背景和已有研究工作进展情况给予了全面的分析和阐述；通过对区域水分条件（大气降水、土壤水分条件）、植被、土壤、土地利用／土地覆被状况等环境要素的时间与空间特征的对比分析，探讨了研究区内部生态地理特征的差异；在一定的原则指导下，通过建立指标体系，以可拓工程方法和模型为支撑，经过综合分析确定了研究区内半湿润、半干旱区界线划分方案；通过遥感图像解译、典型站点多年降水与温度的小波分析、土地沙漠化时空变化的对比分析等，说明了研究区域对全球变化的响应；表明了该区域所面临的主要环境问题。

The Loess Plateau and its adjacent regions are in the critical eco-envi-ronmental zone of China, which is from subhumid to semi-arid,from forestto steppe and from agricultural regions to animal husbandry regions. Thereare serious environmental problems such as the most extensive and serioussoil erosion in the world, desertification, water shortage for crops, flooddamage, increased soil salinity as well as increased industrial pollution.

黄土高原及其毗邻地区包括以晋、陕、甘为主体的黄土高原，面积约35.85万平方公里，及其周围与之有关联的黄土分布区，范围大致是阴山以南、秦岭以北、太行山以西及日月山和贺兰山以东的地域。J两者合计面积为62.38万平方公里。

He recently completed two years of fieldwork on transnational environmental cooperation to prevent desertification and protect wetlands in Northeast Asia.

他最近完成了两年的田野关於跨国环境合作，以防止荒漠化和保护湿地，在东北亚地区。

Article 38 The state encourages units and individuals in the development of unexploited land in accordance with the overall planning for land utilization and under the prerequisite of protection and improvement of the ecological environment, prevention of water and soil erosion and land desertification; the land suitable to be developed into agricultural land should be developed into agricultural land on a priority basis.

第三十八条国家鼓励单位和个人按照土地利用总体规划，在保护和改善生态环境、防止水土流失和土地荒漠化的前提下，开发未利用的土地；适宜开发为农用地的，应当优先开发成农用地。

Although much effort has been exerted to set up artificial vegetation coverage since the establishment of the People's Republic of China, the trend of desertification and soil loss is still unreversed.

建国后虽然进行了较大规模的人工林草植被建设以及以小流域为单元的综合治理，但水土流失和土地退化总的趋势并没有得到扭转，而且人工林草植被造成土壤干燥化，进一步加剧了生态环境的脆弱性。

Ordosica community and increased from A. ordosica community to C. komarovii community. The meso-xerophyte decreased gradually with the strong xerophyte gradually increasing during the desertification of the grassland.

结果表明：在鄂尔多斯草地荒漠化过程中，植物群落退化的趋势为本氏针茅群落→本氏针茅+油蒿群落→油蒿群落→油蒿+牛心朴子群落→牛心朴子群落。

At the same time, planting yew can prevent soil desertification, with a high environmental value.

同时，种植红豆杉可以防止土壤沙化，具有较高的环保价值。

The concept of ecological environment water requirement of vegetations was put forward, which is the least water requirement to ensure healthy growth and to control sandification, alkalization and even desertification of soil.

在对已往生态环境需水量研究成果进行总结，分析该区自然环境的基础上，提出了植被生态环境需水量的概念，即保证植物正常、健康生长，同时能够抑制土地沙化、碱化，乃至荒漠化发展所需的最小水资源量。

The study is according to the principle that the groundwater depth must be controlled to a range in which either alkalization of saline soil or desertification will not happen.

选择宁夏青铜峡引黄灌区为研究对象，根据确保既不发生盐渍化也不发生荒漠化控制地下水埋深的原则，运用MODFLOW软件，构建了研究区的地下水数值模拟模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。