Impact of Xiaolangdi Water Conservation Project on Deposition Reduction of the Huanghe River Estuary
小浪底工程修建对黄河河口淤积影响

Xiaolangdi Water conservation project is the largest one in the Huanghe River. It changes the oncoming water and sediment process of the Lower Huanghe River and consequently, the deposition of the Huanghe River Estuary. Using obtained experimental formulas, this paper gets the following results:1. Comparing with the situation without Xiaolangdi project, deposition volume decreases at the first utilization stage, and then deposition volume is restored at the second utilization stage. Besides, the deposition volume is also depended on different discharge level of the Xiaolangdi reservoir.2. Global warming and human activities impact on deposition volume of the Huanghe River Estuary. If the water and soil conservation works are continuously increased with the normal speed, in addition to Xiaolangdi project, it is possible to make a good deposition volume reduction, which is better than that under only Xiaolangdi project.3. The river mouth spit is also related to oncoming water and sediment, consequently, to Xiaolangdi project. The Changing amplitude of the river mouth spit at the second utilization stage of Xiaolangdi project is faster than that of the first utilization stage.