What are the main benefits of the development of the Rhone River?

Adopt low dam multi-stage development mode; It not only avoids excessive flood losses, but also meets the requirements of power generation, shipping and irrigation. The Rhone Company plans the Rhone River by dividing it into several small steps. Establish barrage every 1 step. The dam is equipped with movable gates. The length of the reservoir formed by the dam is not large, so dikes are built on both sides of the reservoir to reduce floods. An aqueduct is built from the upstream of the dam and extends far to the downstream of the dam, and a hydropower station is arranged in the lower section of the aqueduct. A tailrace channel is excavated downstream of the hydropower station to connect with the downstream reservoir. Hydropower stations can make use of the natural drop of the river reach and the water level raised by the dam. The lock is arranged next to the hydropower station, so the diversion channel and tailrace channel are navigation channels. Arrange the irrigation diversion structure at a suitable position. Dikes are generally designed according to the once-in-a-thousand-year flood. The drainage ditch is arranged near the embankment to maintain the groundwater level suitable for crop growth. Set up flood diversion in suitable river reach, and at the same time use the original river capacity to detain flood and reduce flood peak. This arrangement can avoid the interference of sediment on shipping.

When planning the Rhone River, it was considered to build a reservoir with a storage capacity of several billion m3 in the upper reaches to reduce the flood peak and maintain the low water level of the river. However, this scheme will occupy a lot of land. It is planned to build a high dam in Pieschedale Canyon, with a width of 200 meters and a height of 45 meters. The backwater of the reservoir can reach Genesia Reservoir, which is 45km upstream, with a water storage area of 180km2 and an annual power generation of10 billion kW·h ... Another dam is planned to be built in Vivier, upstream of Donzel Canyon, with a reservoir area of 860km2. We had to give up because of the huge losses caused by the flood. The high dam scheme can't control the flood of downstream tributaries. The maximum discharge of the Rhone estuary is 14000m3/s, while the maximum discharge of the Dilans River, a tributary of the left bank, reaches 10000m3/s ... The two banks of the Rhone River are densely populated, with about 2 million people, which is very rich. Therefore, the high dam and large reservoir scheme is abandoned in the planning, and the multi-stage low dam scheme is adopted to save cultivated land and reduce the loss of resettlement and inundation. It is planned to build only one large Ranesia reservoir on the main stream (dam height 104m, total storage capacity of 53 million m3, effective storage capacity of 65,438+200,000 m3), and all the other cascades will be built into low-head runoff power stations.