查询词典 loess plateau

During the Last Interglaciation it was the forest, mainly composed of broadleaves, or forest-grassland at the east and middle part of the Chinese Loess Plateau, and was the forest-grassland at the west part of the Chinese Loess Plateau. It changed to the forest or forest-grassland at the most part of the Chinese Loess Plateau in the Holocene, some kinds of hardwood broadleaves dispersing at the warm temperate and the tropic zones appeared. Now the vegetation at the Chinese Loess Plateau inherits from that during the Holocene, the vegetation have been heavily destroyed owing to the human being actions. The vegetation protection at the Chinese Loess Plateau is a significant problem.

末次间冰期期间气候温暖湿润，黄土高原的中、东部地区主要发育了以落叶阔叶林为主的森林或森林草原植被，黄土高原西部地区主要发育的是以针叶林为主森林草原植被；全新世期间黄土高原的植被状况发生较大变化，黄土高原的大部分地区为森林植被或森林草原植被，植被中还有暖温带落叶阔叶林，并含有少量亚热带种属；现代黄土高原的植被主要还是继承了全新世以来的植被状况，但是由于人类活动的加剧，对黄土高原的植被产生了毁灭性的破坏，因此，如何保护黄土高原的自然植被是我们面临的一个严峻的现实问题。

Ccording to the restoration plan of each province in the corrasive region in Loess Plateau, the effect of ecological restoration on grain production in the corrasive region of loess plateau is analyzed.

bstract 根据黄土高原水土流失区有关各省区制定的退耕规划，分析了生态退耕对粮食生产产生的可能影响。

In Project A, grain shortage will not appear in the corrasive region of Loess Plateau on the whole. But in order to achieve an equilibrium of demand and supply, loess hill regions must import grain from the Loess Platform region.

从A方案看，就黄土高原水土流失区整体而言将不会出现粮食短缺；但具体到分区而言，黄土丘陵区必须通过粮食调入才能满足本区需求，而黄土台塬区则有一定盈余。

This is not surprising, given the closer proximity of Pengyang to the Asian inland dust sources; The average content of calcium carbonateis of Pengyang section is not only higher than that of central loess plateau, but also higher the west of Chinese Loess Plateau, which reflected Pengyang loess had been deposited by near Liupanshan\'s substances that contained more calcium carbonateis; The content of diffluent element of 10m depth in the section increased fast, which indicated that the modern eluviation and the leaching depth of loess may be stronger than our guess; The soil growth index can reflect the intensity of soil forming and the climatic changes; The "abrupt chang" of glacial and interglacial period was caused by strong soil-forming processes that enlarged the discrepancy of granularity between loess and paleosol. However, the magnetic susceptibility nearly cannot reflect the existence of S_8 and the magnetic susceptibility of S_7 is highest in the whole section, which is inconsistent with other studies that S_5 has the highest magnetic susceptibility.Thin-section examination shows that the micro-texture of the soil layers is divided into both cementing texture in S_7, S_5 and S_1, and granular texture in all others.

与其它剖面相比，彭阳剖面粒度总体上要比东部的洛川、西安，甚至西部的兰州、新疆东湾要粗；CaCO_3平均含量不仅高于黄土高原中部，也高于高原西部，反映出本剖面富含碳酸盐的六盘山近源沉积起到了很重要的作用；易溶元素含量在剖面10m处快速升高，淀积特征明显，反映出黄土受现代淋溶成土作用影响较大，黄土直立、疏松、多孔特性和高温与多雨组合的气候特点，使得元素淋溶、淀积的强度和深度超出了传统的认识和判断；烧失量与其它指标相比，不仅能区分冰期、间冰期；而且能够区分出次一级的冰阶、间冰阶，有较高的分辨率；土壤发育指数、红度能够反映土壤强度差异，是反映气候波动的较好指标；然而，磁化率不能反映古土壤S_8的存在，且S_7的磁化率在全剖面中最高，这与大多剖面S_5磁化率最高的特点不一致。4。

In order to explore the grain-size distribution characteristics and geo-genetic types of land desertification in Mo Us desert, the research on the grain-size characteristics of sediments since late Pleistocene has been carried out in the desert area and neighboring area such as inside desert, sand covered loess plateau, loess plateau and river valley. The research result shows that sediments of different geologic genetic types are the fundamental material source of sandy desertification in these areas and the distinguishing of different types of the sediments is the theoretical basis of classification of different geogenetic type of sandy desertification. The contribution of different geological roles on the land desertification and its significance to prevent and deal with the land desertification have also discussed.

为了研究毛乌素沙地沉积物的粒度特征与土地沙漠化的地质成因类型，通过系统研究沙地及相邻地区晚更新世以来在沙地内部、覆沙黄土区、黄土高原和河流谷地与湖泊等不同地质构造地貌条件下所形成的沉积物粒度特征，指出不同地质成因类型的沉积物是这些地区土地沙漠化的物质基础，区分不同类型的沉积物也是构成不同地质成因类型土地沙漠化分类的理论基础，探讨了不同地质作用对土地沙漠化的贡献及其对土地沙漠化防治方面的意义。

As an important tectonic boundary of Northeastern Tibetan Plateau, the Liupan Shan is closely influenced by the uplift/growth process of the Tibetan Plateau, it also plays an important role on the paleogeographic evolution of Chinese Loess Plateau.

作为青藏高原的东北构造边界的六盘山，它的形成演化与青藏高原隆升/增生息息相关，同时六盘山的隆升对黄土高原古地理分异演化产生了重大影响。

According to the geomorphological structure and the origin of the Loess Plateau with reference to the average uplifting velocity of the gorge district between Shanxi and Shaanxi, it is demonstrated that the Loess Plateau is a unique type of accumulated plateau differing from the familiar plateau types, such as, denudated plateau, tectonic plateau and lava plateau etc..

根据黄土高原的地貌结构与成因，结合晋陕峡谷区新生代晚期地壳平均抬升速度的讨论，论证了黄土高原在成因类型上完全不同於剥蚀高原、构造高原、熔岩高原等各种高原类型，它是一种独特类型的叠加高原。

Hilly gullied loess region, the main body of Loess Plateau, is also an eco-economic sensitive area with special landscape pattern. Being an ecological fragile and economically underdeveloped region, environment protection and economic development remain to be double tasks it expects to solve simultaneously.

中文题名黄土高原丘陵沟壑区小流域优化生态－生产范式副题名外文题名 Optimized eco-productive paradigm for small watersheds in hilly gullied Loess Plateau 论文作者孔正红导师张新时院士学科专业生态学研究领域\研究方向学位级别博士学位授予单位中国科学院植物研究所学位授予日期2002 论文页码总数143页关键词农业生态系统优化生态－生产范式小流域黄土丘陵沟壑区馆藏号BSLW /2003 /Q948 /26 黄土丘陵沟壑区是黄土高原的主体部分，也是具有特殊景观格局的生态-经济敏感区。

The ecological environment of the Loess Plateau was warmer and moister than it is today, there was more luxuriant vegetation, and the forest land occupied about 25 % of the entire Loess Plateau.

黄土高原的生态环境较当今温暖湿润，植被更为繁茂，林地约占整个黄土高原面积的25%。

Within a single storm, process of runoff and sediment seem the same in outsets of different scale watersheds, about runoff rate is 1.27 m/s, concentration of sediment tend to change little and nearly 700 kg/m~3, this determine the relationship between water and sediment, or the relation reflect study area situation, for example, soil and event storm and sediment and so on. In fact this program established scale transition partly.(2)The loess plateau in north china is located in the middle yellow river basin, and records some of the highest erosion rates in the world. The hilly part of the loess plateau is one of the most severely eroded regions of the loess plateau.

基于此本论文选择陕北大理河流域为对象，依据黄河支流的水文资料，分析了不同尺度大小流域的水沙侵蚀资料，取得以下结果：(1)发现就次暴雨洪水而言，各尺度流域出口的径流泥沙过程都表现为洪峰陡涨陡落沙蜂陡涨缓落，含沙量随流量增大到一定程度1.27m／s时变化趋于稳定，保持在400kg／m~3以上，决定了该地区水沙之间的关系，不同尺度大小流域出口暴雨洪水的水沙关系在一定程度上是一个区域特征值。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了