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The analysis delineates the structure of complicated sediment transport and the mechanism of discharge more as coming more of the lower Yellow River.

这些分析,揭示了黄河下游复杂输沙现象的结构及多来多排的机理。

The results show that the dewatering performance of the sediment is better, and the mechanical dewatering method can be used.

结果表明,底泥脱水性能良好,可以采用机械脱水的处理方法。

The results indicate that, the water and sediment discharges have decined dramatically in the past 50 years.

结果表明,近50年来渤海湾西岸天津段入海径流量和输沙量均呈显著下降的趋势。

From the analysis of the magnetic susceptibility,TOC,TN,pigment,organic car-bon isotope ,HI,saturated hydrocarbon and 14C dating etc. of the sediment samples from coresof two boreholes in the Taihu lake,a knowledge of the evolution of paleoenvironment of thelake during the last 14ka is achieved. The results show that the lake has undergone the fol-lowing stages .. The Lake was at a low level ,or even became exposed during 14.3-13.3kaBP,reflecting an arid climate. There existed a transitional stage during 13.3-12.4kaBP,the climate being slightly warm and wet. There are indications of a cold and dry climate around 11.5kaBP,probably corresponding to the Younger Drays event ,comparable with other areas in east China.

本文根据东西太湖短柱岩芯的沉积物的物理、化学、生物指标的综合分析,讨论了该区距今14ka来的古气候变化过程,结果表明14.3-13.3kaBP,太湖水位低,环境指标甚至表现为暴露特征,反映了气候干旱:13.3-12.4kaBP,为偏暖湿的过渡阶段;该孔柱270-280cm(11.5kaBP左右)各类指标均明显更映冷干特征,可能是Younger Drays事件的记录,与我国东部其它地区有可比性;约10.9-10kaBP,这一时期是整个研究时段内一个较显著的温暖期。

The materials obtained from two profiles in Weihe floodplain in Gaoling Xi'an show that the sediment developed well and grain size changed greatly, which indicated the flood change of Weihe River clearly.

西安高陵渭河河漫滩两个沉积剖面的研究表明,近120年来渭河河漫滩沉积物发育好,粒度变化明显,能够清楚地指示渭河洪水的演变。

A certain number of suspending gravels are randomly selected to visual ly simulate sediment precipitation process.

统计模拟结果可得到充填层的可视化结构及孔喉直径的分布状况。

Soil and water loss in the gullied loess hilly region in northern Shaanxi attracts worldwide attention, where soiseasonable distribution of contour shrub belt is of significant soil and water conservation effect with runoff decrease of over 30%, sediment reduction of more than 50%, and it can also increase plant coverage of 15% to 20% on slope farmland and forms shrub network on hill slope,and change the situation of ecological environment deterioration and sparse vegetation.

摘 要]陕北黄土丘陵区的水土流失问题举世瞩目,而坡耕地的水土流失尤为严重。资料表明,配置合理的等高灌木带具有较强的保持水土效益,其径流削减率在30%以上,泥沙削减率在50%以上,可增加坡耕地植被覆盖度15%~20%,在峁坡上能很快形成林网,大大改观坡耕地长期植被稀疏、生态环境恶化状况。

The sediment retained by dams at early stage in the watersheds where the treatment degree is higher in the gullied rolling loess area of Gansu is mainly gravity erosion coming from gullies and banks of reservoir areas.

甘肃黄土丘陵沟壑区治理程度较高的流域,前期坝库拦蓄的泥沙主要来源于坝库区沟岸的重力侵蚀,其泥沙量占坝库拦蓄泥沙总量的 83 63 %,坡面侵蚀仅占 16 3 7%。

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。

It also contains deposits of sediment left by flowing water and the crater is cut by gullies.

此外,这里还有流水过境后留下的沉积物以及陨坑被冲沟&切割&的证据。

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