河道水面 meaning in English

stream surface

Considering the joint operation of the three gorges and gezhouba hydropower stations , influences of the daily regulation planning of the hydropower stations on the water surface slope of the downstream reach of the three gorges reservoir are studied
?结合三峡和葛洲坝两电站联合运行的实际情况，研究了调节方案对三峡水库下游河道水面比降的影响。
In this paper , remote sensing picture is processed by erdas , a famous rs & gis platform , and information on the chong qing part of the yangtze river is obtained , which can be compared with the water level data from numerical calculation and evaluate the computation precision of mathematical models
本文利用著名的rs & gis软件平台erdas对遥感图片进行处理，获取长江重庆河段河网的信息。可以将提取的河道水面线与数学模型计算的水面线进行比较，对数学模型的计算精度作一个评估。