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Hilly gullied loess region, the main body of Loess Plateau, is also an eco-economic sensitive area with special landscape pattern.

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。

To construct large rainwater collecting and storing projects in line with local conditions in gullied rolling loess area of the Loess Plateau can effectively utilize the rainwater resources and provide services for soil and water conservation measures and production and life of the local people.

在黄土高原的黄土丘陵沟壑区因地制宜建设大型雨水集蓄工程,可有效利用雨水资源,为水保措施和当地群众的生产生活服务。

The mean value of geomorphic parameters of heavy and coarse sediment load area of the middle Yellow River is 10.89, of which, the first sub-region of gullied rolling loess area is the maximum, the second sub-region of gullied rolling loess area and mountainous region second and dune sand area the minimum.

黄河中游多沙粗沙区区域地貌参数平均值为10.89,其中;黄土丘陵沟壑区第一副区最大,黄土丘陵沟壑区第二副区与土石山区次之,风沙区最小。

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。

Haiyuan county belongs to mountainous region of Longzhong loess hilly gullied region in the loess plateau,and there are seven kinds of geological hazards types existing in Haiyuan county ,including soil erosion and water loss,landslide,breakdown,mud rock flow,unstable slope,ground collaps and ground fracture etc.

海原县地处黄土高原,属陇中山地与黄土丘陵区,主要地质灾害有水土流失、滑坡、崩塌、泥石流、不稳定斜坡、地面塌陷和地裂缝等7种类型,以及人类工程经济活动引起的地质灾害类型。

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%。

Based on the research of influencing factors and regularities of distribution of loess side slope stability in Northwest, the author select Pingshuo Antaibao southern spoil bank as subject investigated, and abstract several the most rudimental influencing factors which are ubiquitous concerning slope stability in loess area such as sloping shape, slope ratio, bulk density, cohesive force, angle of internal friction, elastic modulus, Poisson ratio, water immersion.

本文在探讨黄土地区边坡稳定性的影响因素及其分布规律的基础之上,选取平朔安太堡南排土场为研究对象,抽象出对于黄土地区边坡稳定性具有普遍意义的几个最基本影响因子:坡型、坡比、容重、内聚力、内摩擦角、弹性模量、泊松比、水。

That is using the dynamic torsional shear apparatus, the tests of dynamic strength, dynamic modulus and damping ratio of Yangling unsaturated intact loess are carried out by using torsional cyclic load triaxial apparatus under different moisture condition, and the pore water pressure and pore air pressure of unsaturated intact loess are measured in testing process, as well as the obvious regularity are acquired from the study results.

将该方法应用于对杨凌非饱和黄土在不同湿度条件下进行了动强度及动模量和阻尼比试验,试验过程中实现了对非饱和黄土的孔隙水压力和孔隙气压力的动态测量,试验结果取得了比较明显的规律性。

Through indoor conventional experiment, saturation test and non-confining compression strength test , research has been put to the physical and mechanical characteristics of the loess consolidated by Na_(2)SiO_(3) solusition, a Na_(2)SiO_(3) composite body, and the basic mechanical parameters of the loess near the Daming Palace Han Yuan Temple have been acquited.

通过室内常规实验、浸水实验、无侧限抗压强度实验,对Na2SiO3溶液加固的黄土-Na2SiO3复合体的物理力学特性进行了室内实验研究,取得了大明宫含元殿窑址附近黄土-Na2SiO3复合体的基本力学特性参数,可供该地区其他类似条件的遗址加固设计参考。

The critical loess slopes along the highways were the inputted form of slopes and measured values of cohesions and internal friction angles were the reference values of random variants. Monte-Carlo method was used to choose samples and the formula of the Bishop simplified method was regarded as control equation. The reliabilities of the loess high slopes in three positions of Shaanxi Province were simulated. Failure probability and reliability index were obtained.

以极限状态坡作为输入坡型,将陕西黄土地区公路勘察中实测的粘聚力和内摩擦角作为主要随机变量参考值,采用Monte-Carlo法抽样,简化Bishop法公式作为控制方程,对陕西地区3个地段的黄土高边坡进行了可靠度模拟,获得黄土高边坡的失效概率与可靠指标。

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