| 1 | Zhaoyuan River is an important section of and the front of Songhua River mainstream for water quality monitoring. | |
| 2 | The sand and gravel in the Yangtze river is good building and filling materials. | |
| 3 | Countries along the Mekong River have disagreed with Laos on its proposal to build the first hydropower dam on the main stream of the lower river. | |
| 4 | However, the natural vegetation will be affected after the implementation of river training works of Tarim river main stem. | |
| 5 | The length of the trunk stream of 253 km, the basin area of 5, 543 sq. miles, for the Xiangjiang River in Xiangbei the largest tributary. |
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