To evaluate feasibility of a waterway project, the most important index is EIRR, which is calculated based on the economic benefit, investment and maintenance expenditure.
评价航道工程在经济上是否可行，最重要的一个评价指标就是经济内部收益率。
2
The Yangtze waterway transport plays an important role and occupies an important place in the economic system and the comprehensive traffic system of the basin.
长江水运在流域经济和综合交通系统中占有重要的作用和地位。
3
The Yangtze River is the golden waterway of our country, it connect the three major economic zones in the southwest, central, eastern of China as a link.