Influence of reservoir construction on geographical environment

Idea 1: ①: favorable influence. For example, improving local microclimate and rationally distributing water resources in river basins.

②: Adverse effects. For example, destroying the ecological environment, destroying biodiversity, aggravating geological instability, causing sediment deposition in the reservoir area, changing the water quality of rivers, immigration problems and the impact on the scenery and cultural relics in the reservoir area.

Idea 2: ① To the natural environment.

②: For the humanistic society. The flood control function of the reservoir provides tap water and irrigation water, power generation, tourism value, shipping and aquaculture for the nearby areas.

Idea 3: (mainly suitable for arid areas) ①: Upstream

②: Midstream

②: Downstream. Soil salinization, water quality deterioration in the reservoir area and downstream, serious river bed erosion in the downstream, etc.