河流长度

河流长度、流域面积的大小及支流的多少、生物群落的相互作用、河流的位置与生产力等均影响着鱼类多样性。

Fish diversity was impacted by river length , basin area , branches quantity , interspecific interaction in aquatic community , river location , and its productivity .

探讨与香溪河具有相似纬度、相似河流长度和流域面积，同为长江上游支流的九龙河和冈曲河的大型底栖动物的群落结构特征与香溪河的差异。

The three streams had similar latitude , river length and watershed area . All were the tributaries of the Yangtse River and located in the upstream areas .

溪流倒木是指在河流中长度大于1m、直径大于10cm的死木。

In_stream wood is defined as dead wood ( > 10 cm diameter and > 1 m length ) in the stream channel .

这河流的长度是多少？

What is the length of the river ?

要建立一个真实的河床，确保河堤高于河流整个长度的开始点。

To create a realistic river bed , make sure that the walls of the river are above the starting point of the river for the entire length of the river .

模型的尺寸是以现场冰情为准，其中河宽为长，冰厚为高。河流的轴向长度远远大于河宽，属于平面应变问题，计算宽度取为1m。

It is a kind of plane strain problem because the river length is far more than its width so that the width of the model is set to be 1m .

盆地内的河流数量和长度也能调节径流。

Runoff is also governed by the number and the length of streams in the basin .

设计一种结合河流等级、长度与所在层次的综合指标进行河流选取；

A complex index that combined length , grade and level is designed for structured river selection .

然而近年来强烈的人类活动对河流水系产生了较大的影响，使得河流、湖泊的长度、面积、等级均发生了改变，进而造成水系结构的变化。

However , the activities of human are strongly affecting the river system in recent years . The length and area of rivers and lakes are changed , and then the pattern of river system changed as well .

利用二维随机水质模型计算了排入河流中的污染物浓度分布，建立了多个不确定因素影响时河流污染带长度及水环境容量的概率分布计算模型。

Based on the concentration distribution of the pollutants calculated by two-dimensional stochastic model of water quality , a calculating model was established to determine the probability distribution of the pollution zone and water environmental capacity under some uncertain factors .