Study achievement appears as following aspects : ( 1 ) yellow river estuary gate river flow and tide flow mixed area is not keep standing deposition status , on special income water and sediment conditions , boundary conditions and oceanic power conditions , this area may on the scour status ; ( 2 ) observed from estuary sediment deposition distributing process : delta and sea offing area sediment deposition vary trend is similar , each part sediment deposition scale varies as wave shape ; ( 3 ) on estuary gate , affect the sediment deposition factors , primary factors are tide prop , the gate widens gradually , estuary gate have branches , brine induced flocculation . this paper study the estuary gate widen , estuary gate have branches to affect the river channel deposition in quantity ; ( 4 ) based on field measured data , for the first time , deduce the estuary sediment deposition and distributing regress formula which can estimate estuary different areas sediment deposition volume ; ( 5 ) this subject demonstrate the estuary delta coastline dynamic balance conception , build the relationship between the estuary income sediment with deposition land area , draw the following important conclusion : when estuary years - averaged income sediment keeps at 345 million tons , the delta coastline may on the dynamic balance status . ( 6 ) this subject firstly brings up estuary sediment optimized control conception , and has the primary study on the macroscopically optimized control conception method 研究认为： ( 1 )黄河河口口门迳流潮汐区域并非持续保持淤积状态，在特定的来水来沙、边界条件和海洋动力条件下，该区域可以处于冲刷状态； ( 2 )从河口泥沙沉积分配的过程来看：三角洲与滨海区泥沙的沉积变化趋势是基本一致的，各部位的泥沙沉积比例变化基本呈波动状态，且三角洲与滨海区泥沙的沉积比例与来沙量密切相关，基本成正比关系； ( 3 )在口门处，影响泥沙沉淤的因素主要集中在潮汐顶托、口门逐渐加宽、河口门分汊、盐水造成絮凝等，本报告主要对口门加宽，口门西妥理工大学工程硕士专业学位论文分汉对河道淤积的影响进行了定量分析: (一扣根据实测资料首次建立了河赎流路泥沙沉积分配的回归计算式，据此可以预估计算河口不同区域泥沙的沉淤量; 、 5 )本项研究首次论证了河口三角洲岸线动态平衡的概念，并建立了黄河河口来沙量与造陆面积的相关关系，得出了当河口多年平均来沙量维持在3 . 45亿t时其河口三角洲岸线则可能处于动态平衡状态的重要结论; ‘ 6 )本项研究首次提出了河口泥沙优化调控的概念，并对其宏观优化调控模式进行了初步探讨。
In the world , through a large amount of research work , have made some progress in theory , method and technology , for instance lucc information is obtained and deals with , lucc urges the mechanism to be studied etc . the loess plateau in the north of shanxi province is a very important geographical area in our country , belong to half an arid , arid district , it is the important source of the yellow river and silt 国际上，通过大量的研究工作，在理论、方法和技术方面取得了一些进展，如lucc信息获取与处理， lucc驱动机制研究等。对于土地利用变化过程的研究，文献颇多，但对土地利用不同的类型而言，其变化过程通常集中反映在特定的区域空间范围内，这样土地利用变化的动态分析和模型研究就应在这些热点地区进行，研究结果才具有针对性和典型意义。陕北黄土高原是我国一个十分重要的地理区域，属于半干旱、干旱区，是黄河泥沙的重要来源。
This paper studied the flocculation of yellow river ' s loess particles from morphological characteristics by fractal theory and computer simulation technique . the contens concluded the formula of macromolecule flocculant dosage and automatical dosing model , computer simulation of particles ' s aggregation in two dimensional space , morphological characteristics of floes of yellow river ' s loess particles and its flocculation kinetics and floes model 本文以高分子絮凝黄河泥沙为研究对象，应用分形理论和计算机模拟技术，从形态学角度对这一过程进行了研究，研究内容包括高分子絮凝剂投药量公式和自动投药控制模型、二维空间内颗粒凝聚过程的计算机模拟、黄河泥沙絮体形态学以及高分子絮凝黄河泥沙的生长动力学和絮体结构模型。
This paper summarize the estuary sediment management methods also , analyze and the following aspects and give evaluations : estuary dredging and lead the flow , lead water to scour the river channel , build the xihekou reservoir , estuary gate deposition management , dike reinforced etc 本文还对河口泥沙的处理途径和措施进行了概括总结，对河口疏浚与导流、引海水冲刷河道、建设西河口水利枢纽、拦门沙治理、人工有计划改道和出汉、加高堤防和加固防护工程和挖河固堤工程等进行了分析评价。
Yellow river estuary is typical weak tide and high sediment deposition estuary , the yellow river sediment transport and settling deposition process is the capital factor to determine estuary evolvement characteristics . any method provided for estuary management , there is no exception to have tight relationship with estuary sediment transport and settling deposition process . this paper summarized the yellow river estuary basic characteristics firstly , point out existing problem in this research domain 黄河河口系典型的弱潮多沙堆积性河口，黄河河口泥沙的输移扩散和沉积过程是决定河口演变发展特征的首要因素，黄河河口任何一项治理措施的提出，无一例外均与河口泥沙的输移和沉积分布状况存在密切关系本文首先对黄河河口的基本特性进行了概括总结，在简略回顾黄河河口泥沙输移与沉积的有关研究成果的基础上，指出了当前在此研究领域内存在的问题。
It is mainly by analyzing the features of sediment concentration distribution in vertical in this paper , and then the problems of effect of headwork gates on sediment prevention , relation between distribution of sediment deposition in irrigated areas and its treatment and utilization , estimating the influence of withdrawing water and sediment on channel deposition and erosion in lower yellow river , and treatment and utilization of the sediment entered into canals are discussed 本文主要从分析计算含沙量沿垂线分布特点，探讨渠首防沙的作用，分析灌区泥沙淤积分布特性与泥沙处理利用的关系，分析计算引水引沙对黄河下游河道冲淤影响及入渠泥沙的处理利用等问题。
Ann is a adaptive and non - linear dynamic system made from superposition of many simple components which we call neuron . the question for computation of d _ ( cmax ) belongs to incipient motion of sediment in essence , which is the same question with two different sides , because computation of critical condition ( including critical velocity critical shear stress critical power ) for a grain size under a bed - load condition is equal to computation of a grain size during incipient motion under the bed - load condition and the water flow condition given before . and computation of gross bed - load transport rate has great relationship with standard of incipient motion 对于d _ ( cmax )的推求，在本质上还是泥沙的起动问题，因为寻求某种床沙条件下某级泥沙的起动条件(如起动流速、起动切应力、起动功率)和寻求某种水流和床沙条件下的起动粒径是同一问题的两个方面而已；而对于推移质总输沙率推求也和泥沙起动问题中的起动标准选择紧密相关。
The paper analyzes and summarizes the following laws of distinctive sediment yield produced in storm floods of the region based on predecessors ' study : storm is the main dynamic force of erosive sediment yield and storm , flood and sediment exist an inevitable relation ; the flood occurring time is concentrated with high peaks and huge volume , suddenly rising and suddenly falling and has decisive influence to the formation of a major flood peak in the middle yellow river ; the main reasons of concentrated coarse sediment of the river is severe erosive sediment yield , strong sediment transporting capacity and high sediment concentration ; the important influence of frequent or continued storm floods happened in he - long reach especially in coarse sediment concentrated region to the sediment transport of the yellow river and ; along with the increase of harnessing , regional flood trend is becoming smaller but the variation of sediment quantity is not obvious and the reaction of peak discharge and flood runoff of majority tributaries are not sensitive , showing that a general and normal engineering works can not effectively control regional major floods especially the sediment of an extraordinary flood 摘要在前人研究的基础上分析总结了该区特有的暴雨洪水产沙规律：暴雨是侵蚀产沙的主要动力，暴雨、洪水、泥沙之间存在着必然的关系；洪水发生时间集中，峰高量大，暴涨暴落，对黄河中游大洪峰的形成具有决定性影响；侵蚀产沙强烈而粗泥沙集中，输沙能力强，洪水含沙量高，是黄河粗泥沙的集中来源地；河龙区间特别是粗泥沙集中来源区频繁或连续的暴雨洪水对黄河输沙有重要影响；随着治理水平的提高，区域洪水有减小趋势，但泥沙量变化不明显，大部分支流的洪峰流量、洪水含水量反应不敏感，说明一般规模和水平的治理工程还不能有效控制区域大洪水特别是特大洪水的泥沙。
It shows that topograhy fractal demension is reseanable in describing change of topography . based on this model and after introducing runoff erosivity factor , sediment yield model of watershed model was setup by using multi - regression analysis method . vi ) the relationship model between watershed topography parameter and 该关系模型以地形分维数为地形量化参数，以径流侵蚀力代表径流侵蚀土壤和搬运泥沙的能力，揭示了地貌形态因素和径流侵蚀力与输沙模数之间的内在关系;但此关系模型仅考虑了地形因子，还需考虑土壤、植被以及流域治理因素等综合影响。
