Moreover , attentions must be paid to the tributary with slight slope bed , because the water flowing into the tributary from the main channel during the uprising period of main channel flood may cause large - scale inundate in the tributary basin 研究结果表明：在干支流交汇口，干流流量变化速率越大，支流倒灌流量越大；干流洪水陡涨时灌入支流的巨大水量对底坡平缓支流可能造成的淹没危害应引起充分重视。
On the basis of fuzzy matter - element analysis , a fuzzy matter - element model for evaluation of compensation benefits of cascade reservoirs on the mainstream of the yellow river was established by combination with the concept of euclid approach degree 摘要在模糊物元分析的基础上，结合欧氏贴近度的概念，建立了基于欧氏贴近度的黄河干流梯级水库补偿效益方案评价的模糊物元模型，采用主客观赋权法计算评价指标的权重。
The jiangkou hydropower station that is now under construction is the largest hydropower project on the main stream of the furong river . it ' s the most important electricity energe source of chongqing in the 21 century and it also be the main project of the big develop of western 江口水电站是重庆21世纪重要电力能源供应基地，是西部大开发的一项骨干工程，也是乌江支流之一的芙蓉江干流上最大的在建水电工程，目前该工程正在紧张的施工之中。
With a correlation analysis , the long - term practice of regional development provides a great evident to prove that the dominate factor of land use change of yrb , out of most experts ' expection , is the wide spread industrialization in the rural area rather than concentrated itself in the urban area 跨部门的相关分析结果表明，在长达半个世纪的经济发展过程，决定长江干流土地资源投入状态变化的主导因素是农村地区工业化，而不是城市化发展本身。
The plan and research process , the main achievements and effectiveness on sand mining in the trunk channel of middle and lower yangtze river are systematically presented and the further work suggestions on doing a good job of sand mining plan in trunk channel of the middle and lower yangtze river are put forward 较系统地阐述了长江中下游干流河道采砂规划研究过程、取得的主要成果以及成效，提出了进一步做好长江中下游干流河道采砂规划工作的建议。
Conomic analysis model . this model has mainly four peculiarities as follows : 1 . he method of large systems resolution , assemble and gradational development is used , therefore , the dimensions of the calculation program is reduced 本模型系统主要包括了以下三个部分： 1 、支流及非控制区模拟模型2 、干流模拟模型3 、经济评价模型本模型系统主要具有以下特点： 1 、采用了大系统分解、集成、分层次开发的方法，对支流和干流模型分级开发，减小了计算模型的规模。
