泥沙输移比,sediment delivery ratio
1)sediment delivery ratio泥沙输移比
1.Effect of erosion control measures onsediment delivery ratio;水土保持措施对流域泥沙输移比的影响
2.Research methods and results analysis ofsediment delivery ratio泥沙输移比的研究方法及成果分析
3.This paper reviews the previous studies on the relationship betweensediment delivery ratio and drainage area which reflects essentially the relationship between sediment yield and drainage area.提出至今所有流域泥沙输移比与流域面积关系其实质都是流域输沙模数与流域面积的关系。
英文短句/例句
1.Assessment of Sediment Delivery Ratio in Daning River Watershed Based on AnnAGNPS Model基于AnnAGNPS模型的大宁河流域泥沙输移比评价
2.Sedimentation embodies the processes of evosion, entrainment, transportation, deposition, and compaction of sediment.泥沙问题包括泥沙的侵蚀、挟带、输移、淤泥和密度的过程。
3.Sediment Transport in the Huanghe River Mouth and the Recent Deltaic Evolution;黄河口泥沙输移及三角洲的近期演变
4.Study on Yellow River Estuary Sediment Transport and It s Distributing Regulation;黄河河口泥沙输移及其分布规律研究
5.Verification on formulas of bed-load sediment transport rate at the upstream of Yangtze River长江上游推移质泥沙输沙率公式的检验
6.Surface Erosion in Upper Yangtze Region and River Sediment Transport长江上游流域地表侵蚀与河流泥沙输移
7.Two-D Simulation of Sediment Transport and Bed Deformation by Tides潮汐水流泥沙输移与河床变形的二维数学模型
8.Flow Resistance and Sediment Transport in Compound Channels;复式河槽水流阻力及泥沙输移特性研究
9.The Simulation of Dredged Sediment Transport and Diffusion on Marine Dumping Ground;海洋倾倒区抛卸疏浚泥悬沙输移扩散模拟研究
10.Numerical simulation of the dispersion and transportation of suspended sediment from dredged soil matter疏浚土倾倒后悬浮泥沙扩散输移的数值模拟
11.Relationship between ion transport and sediment discharge in river河流水化学特性与流域泥沙输移的相关性研究
12.Controlling experiments for dynamic mechanisms of suspended transport of SPM introduced from the Yellow River to the Bohai Sea黄河入海泥沙悬移输送机制的控制试验
13.The sediments from the Yangtze Estuary transport into the Hangzhou Bay by densimetric flow through the passage.通过进一步研究还发现，长江口泥沙以异重流的方式向杭州湾输移。
14.Bedform-dependent sediment transport model and its application in the Lower Yellow River基于床面形态的泥沙输移模式及其在黄河下游的应用
15.Numerical simulation of sediment transport in discontinuous shallow water flows with triangle grids基于三角形网格的浅水间断流动泥沙输移数值模拟
16.Sediment transport characteristics at the monthly and yearly scales in midstream of Wuyuer River in the typical black soil region of Northeastern China东北典型黑土区乌裕尔河中游泥沙输移月年时间尺度特征
17.Response for the Climate Changes to the Transportation of Sediment in Longchuanjiang River Based on MLP-ANN Model基于MLP-ANN神经网络的河流泥沙输移对气候变化的响应
18.NUMERICAL SIMULATION ON SEASONAL TRANSPORTATION OF SUSPENDED SEDIMENT FROM HUANGHE(YELLOW) RIVER TO BOHAI SEA黄河入海泥沙在渤海中悬移输送季节变化的数值研究
相关短句/例句
channel sediment delivery ratio河道泥沙输移比
1.Thechannel sediment delivery ratio(SDR)of the Yichang-Wuhan reach in the middle Yangtze River has been determined using the concept of sediment budget at channel-reach scale,based on which the variation in SDR from 1956~1997 has been studied in response to the variation in sediment load and flow inputs.运用泥沙收支平衡(Sediment budget)的概念确定长江中游宜昌-武汉河段的泥沙输移比,并运用数理统计方法,研究了1955~1997年间河道泥沙输移比对水沙变化的响应。
3)natural sediment delivery rate自然泥沙输移比
4)SDR model泥沙输移比模型
1.There are two methods in the SDR research: direct calculation based on the definition of SDR and model calculation based onSDR models.对国内外泥沙输移比的研究方法及成果进行总结与分析,认为泥沙输移比的研究方法可分为直接计算(根据定义)与模型计算(通过建立泥沙输移比模型)2种。
5)sediment transport泥沙输移
1.Influence of flood wave type onsediment transport in lower reaches of Yellow River;黄河下游不同峰型洪水对泥沙输移的影响
2.Three-dimensional modelling ofsediment transport in the Pearl River Estuary;三维水动力泥沙输移模型及其在珠江口的应用
3.Study onsediment transport in the lower Yellow River during flood period;黄河下游洪水的泥沙输移特征
6)sediment transportation泥沙输移
1.Since the coast of the Bohai Bay is a typical plain silty one,the problems about engineering sediments,such as finesediment transportation and how to reduce silting amount for the port and waterway,have come across one after another in the construction of the Tianjin Port and the Huanghua Port of Hebei Province,the two largest artificial ports in China.文章以渤海湾西南部大口河沿岸海域现场观测资料为基础 ,通过近岸水动力、泥沙输移、岸滩沉积过程及冲淤演变等综合分析 ,为平原淤泥质海岸“浅水深用”的建港战略决策提供理论依
2.According to meteorological factor and underlying surface condition of the watershed both Jinsha river and Jialing river in Yangtze upstream river, the probability of Yangtze upstream river changing into second Yellow river are studied based on surface erosion,sediment transportation, water and soil loss, as well as human activity.从气象因素和下垫面因素出发 ,重点针对长江上游地区的金沙江和嘉陵江流域 2个主要产沙区地表侵蚀和河流泥沙输移特征、来水来沙条件 ,以及人类活动对水土流失的影响程度 ,分析了长江上游成为第 2条黄河的可能性。
3.?137)Cs──an artificial radioactive isotope which is resulted from weapons testing mainly in1950s and 1960s was used as a tracer in soil erosion andsediment transportation.运用２０世纪五六十年代大气核试验所产生的人工放射性同位素￣（１３７）Ｃｓ为示踪元素，分析了陕西省子长县黄土峁玻耕地￣（１３７）Ｃｓ的坡面分布特征，计算出该坡耕地土壤侵蚀模数６３８０—８８９０ｔ/［（ｋｍ）￣２·ａ］；坡地底部剖面６和剖面１４的土壤堆积速率分别为２８０和４２３０（ｔ/［（ｋｍ）￣２·ａ］；该坡地剖面线１和剖面线２方向上的泥沙输移比０。
延伸阅读
泥沙输移比泥沙输移比sediment delivery ratio嗜红是潺岁淤，，匕乙护寸月lJ门兰7卜肠(sediment delivery ratio)在一定时段内，通过沟道或河流某一观测断面的总输沙量与该断面以上的流域总侵蚀量之比。输移比反映了从侵蚀源地到某一观测断面沿程的泥沙输移及沉积的变化量。在上游面蚀、沟蚀、河道侵蚀及其他侵蚀可以估算的情况下，如能预先知道输移比值，就能预报下游的产沙量，从而为中小流域开发治理规划的制订，防治土壤侵蚀措施的选择，以及沟道工程的建设等提供科学数据。输移比概念是1950年布朗(Brown)为估计美国入河入海的泥沙流量时提出来的。其后有关学者相继研究，各自取得一些区域性的经验成果，但目前尚无普遍适用的关系式。其原因，一方面是由于泥沙输移过程及其与流域相互作用的复杂性，再一方面是由于缺乏相关变量的确定评价。影响输移比的因素包括地貌及环境因子，如流域大小、形态及沟道特征，侵蚀物质的粒径与上壤质地结构，植被与地表粗糙度，土地利用状况等。计算输移比的核心是估算流域总侵蚀量。从本方法是:当面蚀为主时，可应用通用土壤流失方程;但当坡面及沟道侵蚀模数相差显著，且以沟蚀为主时，则流域总侵蚀量等于坡面侵蚀，沟壑侵蚀和河道侵蚀之和，后者又必须包含重力侵蚀。中国有关学者分析研究了黄河中游黄土丘陵沟壑区的资料后初步认为:不论流域大小，从长时期看，输移比接近于1 .0。此外，还分析r陕北大理河流域各级不同大小流域的输移比，得出下式:刀刀=1 .29+1.37InRe一0.O25LAA式中DR为输移比;Rc为沟壑密度(公里/公里“);A为流域面积(平方公里)。长江流域的输移比平均为0 .25。各国学者求得的输移比一般在1/2一1/3，甚至更小。它随流域面积的一l/8一一1/5次幂而变化。美国全国范围内105个农业生产区的研究证明，输移比为总侵蚀量的0.1一37.8%。其东南部山麓地区采用下式:1092)R=4.5一0.23logl0A一。.:1，。:食一:.:，，109二八式中D、为输移比;、为流域面积(平方公里);贪为无因次流域长高比;B为加权平均叉比。泥沙输移比实际上是一个黑箱子概念。当流域作为一个时空分布系统时，它的局限性就十分突出。因为它对系统中的种种过程，既难以评价不同控制因素的精确影响，也不能预报由于流域形态改变而产生的变化，即它无法解决人类活动影响问题。泥沙输移比应被流域产沙模型所代替，模型要能从机理上阐明泥沙运动从源地通过流域系统到达观测断面的各种过程，并能考虑到它在系统中的时空变化与分布。当前主要趋势是研究:输送能力的精确评价及数学表述方式;表面粗糙特征、沉积环境及沉积机遇问题;粘性泥沙的反应;土壤团聚体的行为及影响范围及其与原状土壤颗粒影响的差异;降雨能量输出与浅层地表水流对输送泥沙的影响;悬沙颗粒运行距离的机率分布;间歇运动与滞留时间。总之，还需要做更多的工作，使结合流域地貌景观的泥沙运动能进一步阐明泥沙输移比。(华绍祖)
