今天，河流控制的原因有很多，主要是为了维持可靠的水资源供应，以满足日常生活、农业和工业、发电、航行的用水需要，并起到防洪作用。
Today, rivers are controlled for many reasons, primarily to maintain reliable water supplies for daily, agricultural and industrial needs, for power generation, for navigation, and to prevent flooding.
森林因其提供的多方面产品，在很多方面都有着重大作用，西方纳税人需要亚马逊热带雨林帮助控制气候变暖，巴西人需要雨林让河流长流水，让水力发电机能发电，亚马逊流域的豆农需要雨林带来足够的降水。
Western taxpayers need the Amazon rainforest to control their climate. Brazil needs it to help feed its rivers and generate hydro-power.
山体细粒沉淀物在冰川与河流活动的作用下被冲刷下来，接着被风吹走或水流带走。
The actions of glaciers and rivers scrape away fine sediment, which is carried away by water and wind.
形成我们农场东部边界的一条河流一直在我们生活中发挥着重要作用。
The river which forms the eastern boundary of our farm has always played an important part in our lives.
我们发现融化的水在印度河流域和Brahmaputra是如此之重要，而在扬子江流域却仅仅起着不太大的作用。
"We show that meltwater is extremely important in the Indus basin and important for the Brahmaputra basin," they wrote, "but plays only a modest role for the Ganges, Yangtze and Yellow rivers."
树木所起的作用不止于保持水土。树木还吸收水份、防止洪水突发，并使河流不至于含有可杀死鱼类的泥沙沉淀。
Trees do more than keep the soil in place. They also soak up water and prevent flash floods, and keep rivers clear of sediment that can kill fish.
河流中叶片凋落物在春夏季节的快速分解对底栖生物群落和下游养分循环有重要作用。
Generally, fast breakdown rates of leaf litter in the Xiangxi River indicated that riparian leaf litter played a significant role in the nutrient cycling and benthic communities.
碎屑沉积物衍生自陆地物质，大部分以铝硅酸盐矿物形式存在，由河流和风的作用而沉积于海洋。
It derives from land materials, mostly in the form of aluminosilicate minerals, and is deposited in the ocean by rivers and wind.
由于构造破碎和河流切割引起岩石卸荷与松动，使岩石有利于水的渗入和岩溶作用。
Due to the unloading and loose - ning brought about by tectonic shattering and river cutting, the mud limestone becomes favorable for water infiltration and karstification.
这些足以说明，在自然状况下，河流演变在沙丘群和沙地形成演化中起着非常重要的促进作用。
Therefore, river evolution has very vital initiative and promoting effects on the formation and development of sand-dune groups and sandy land in natural conditions.
地质构造作用，控制河流的走向和流势；
The geological structure controls the trend and the flow of the river.
张芳枝。河流冲刷作用下的堤岸稳定性研究。暨南大学博士论文，2010年。
Zhang Fangzhi. Research on Stability of Embankment under Effects of River Scouring. Jinan University, 2010.
长江不是世界上最长、最宽或作用最大的河流。
The Yangtze River is not the longest, the widest, or the most powerful river in the world.
特别是在与冲积物相比较时，河流沉积趋向于分选得很好，因为河流提供了较稳定的搬运作用。
Fluvial deposits tend to be well sorted, especially in comparison with alluvial deposits, because of the relatively steady transport provided by rivers.
河流沉积学的研究不但具有重要的理论意义，而且对生产实践和洪灾防治具有重要的指导作用。
The research in fluvial sedimentology is significant not only for theory but also for practice of mine production and flood controlling.
河床河岸地质结构对河流地质作用的制约主导着河道演变的趋势。
The restraint of geologic structure of river bed and bank on the rivers geologic action controls the river evolution trend.
河流泥沙是流域内各种自然因素和人为因素综合作用的反应，与河道本身冲淤变化密切相关。
River sediment yield is the reaction of various natural factors and human action factor comprehensive role in basin, wash with sedimentation of river course to change, is related closely.
结果表明：在本实验条件下，淮河流域(江苏段)沉积物对三氯苯的吸附等温线呈线性，分配作用占主导地位。
The results indicate that the sorption isotherms of trichlorobenzene to sediment in Huaihe River (Jiangsu reach) are linear in the experiments condition, and distribution plays a leading role.
河流水体受污染后，在自然环境因素的影响下由各种物理、化学及生物作用能得到一定的净化。
When river water body is polluted, it can be purified by kinds of physical, chemical and biologic functions under natural environment factors.
该计划的目的是研究亚马逊河流域的生物地球化学、水文学、沉积作用等方面的问题。
The purpose of this research project is to understand the biogeochemistry, hydrology, and sedimentation of the Amazon River and its drainage basin.
另外碳氮同位素及其比值在当前的河流有机质生物地球化学研究中仍起着非常重要的示踪作用。
In addition, carbon and nitrogen isotope and its ratio was important indicator in the riverine biogeochemistry study.
本文分析了河水与地下水不同作用形式下的补排关系，给出了河流在地下水流模拟中的两种处理方法。
The article analyzes the relation between recharge and discharge under the different function of groundwater and stream and given two treated methods for stream in groundwater flow simulation.
河道的演变与河流的地质作用密切相关，而河流地质作用受到河谷地质结构的制约。
The river evolution and its geologic action are closely correlative, and the geologic action of a river is restricted by the geologic structure of the river valley.
认为涨、落潮三角洲的发育状况与入湾河流的供沙量、纳潮水域容量、被浪作用、潮差以及口少卜海域的开阔程度有关；
The authors consider that the development of the deltas is related to tidal range, wave conditions, Sediment amount flowing into the bays, bsy volume and unenclosure of sea waters off their gorse.
结果表明：（1 ）在淮河流域这样的高湿地区，水汽对其地表能量平衡，能量输送与循环具有重要作用；
The results show that: (1) In the high humid area such as Huaihe River Basin, the moisture plays an important role in the surface energy balance, energy transportation and cycle.
冲积河流的自我调整作用所遵循的规律，目前在河床演变学中比较常用的是极值假说。
The extreme hypotheses is common law followed the self-adjusting mechanism of alluvial channels in riverbed evolution presently.
控制石炭二叠系两类三角洲发育的主要是河流类型、地形坡度、水体深浅、不同水体密度差及河流沉积作用和湖泊的分散作用等。
The two kinds of deltas are controlled by river types, ground slope, water depth, water density differentia, river sedimentation and lake dispersion.
基底的非线性沉降和湖平面升降的藕合关系对河流的作用方式以及河流沉积的展布特征有很强的控制作用。
The coupling between basement nonlinear subsidence and lake level elevation and subsidence has strong control over fluviation manner and the deposit distribution.
河流随着水的作用流向发生变化，会侵蚀河流流经的岩石。 。
Thee changing course of a river channel as the action of the water wears away the rocks past which the river flows.
河流随着水的作用流向发生变化，会侵蚀河流流经的岩石。 。
Thee changing course of a river channel as the action of the water wears away the rocks past which the river flows.
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