Making a Thorough Study on Major Issues of the Yellow River

The first test on water and sediment regulation conducted on the Yellow in 2002 has spent a long time for preparation, many people participated and obtained a large number of observed data. Three purposes are defined for the test. The first is to seek critical discharge and time of no deposition on the riverbed of the lower Yellow River. The second is to try to scour the whole riverbed of the lower reaches. The third is to verify the existing river training works, mathematics model and physical model and have further understanding on the laws of water and sediment of the Yellow River. It is shown by the results that the test has achieved the desired objective. In future, Yellow Conservancy Commission will further study the following topics: a) operational mode of the Xiaolangdi Reservoir. b) The evolution law of riverbed of the lower Yellow River. c) The cause of formation and endangerment of Secondary Suspended River and countermeasures for prevention. d) Management of the Yellow mouth.