lower course of river 中文意思是什麼
lower course of river
解釋
河流下游-
Dongshen - hong kong water supply scheme to channel dongjiang water to flow southward to shenzhen requires to convert one of the tributaries flowing north to dongjiang - the shima river - into an artificial canal by pumping of water from the shima river from its lower course to its upper course
東深供水工程，引東江水南流至深圳市，需將其中一條原本由南向北流入東江的支流石馬河變成一條人工運河，河水由下游抽回上游，逆流而上，工程因而相當艱巨。 -
Study on main fork changing place characteristics of branching river course in, idle and lower course of changjign river
長江中下游分汊河道主支汊易位特性研究 -
Construct dykes along the main river course of the tarim to channel water through the inland delta down to the lower reaches. river branches are cut off
沿著塔里木河幹流建堤壩，把水通過中游的內陸三角洲送到下游。塔里木內陸三角洲的支流被打斷了。 -
This thesis concludes the flood control situation, engineering measures and the situation of optimal dispatch method. it studies flood control engineering system, which is composed of flood prevention reservoir, river course dyke and natural detention basin, and the relationship between various flood engineering measures according to the composition and characteristics of the flood control engineering of the middle - lower reaches of beijiang. it suggests the objective function based on the least flood loss and the optimal dispatch strategy structure of the middle - lower reaches of beijiang bound with the requirements of the flood gradual progress equation combined with hydrology and hydraulics
本論文總結了我國防洪情勢、防洪工程措施及其優化調度方法研究的現狀；針對珠江流域北江中下游防洪體系的組成及其防洪工程的特性，研究由防洪水庫、河道堤防和天然滯洪區共同組成的防洪工程體系中各防洪工程措施之間的關系；提出了以洪災損失最小為目標函數、以水文學和水力學相結合的洪水演進方程等要求為約束條件的北江中下游防洪體系優化調度策略框架。 -
3 ) the sandbody distribution, physical properties, pore structure and heterogeneities are affected by the microfacies. at the center part of underwater distributive river course, the petrophysics and physical properties are both better than that at the edge of the microface. 4 ) the chang 61 2 - 3 substrata and the substrata of chang 62 " member which show the better porosity, permeability, and better pore structure ; display lower permeability variation coefficient, dart - coefficient and contrast - coefficient and good connecting sandbody so the horizontal heterogeneities is weaker ; whereas manifest stronger inner - heterogeneities due to the numerous intermediates ; present stronger inter - heterogeneities caused by the greater frequency of sandbody
長6儲層中長6 _ 2 ~ （ 1 - 3 ）和長6 _ 2 ~ 1砂層中的各個小層的孔隙度、滲透率值、含油性較好；平面非均質性較弱，表現為級差、突進系數、變異系數較低且砂體的連片程度高，鉆遇率和連通系數較高；與此同時，層內非均質性較強，表現為垂向上夾層的數目較多，厚度較大；層間非均質性也較強表現為分層系數較高。 -
The part of river in anhui stands in the lower of the river and is diverged river. there are a lot of nodes and complex river course
長江皖江段為長江的下游段，為分汊型河段，磯頭眾多、河道復雜。 -
The development course of sand mining management in the trunk channel of the middle and lower yangtze river is also the course of continual renewal and readjustment of national and all level government ' s policy decision on sand mining in river channel
長江中下游幹流河道采砂管理的發展歷程，也就是國家及各級政府有關河道采砂問題決策不斷更新、調整的一個過程。
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