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Why has soil erosion been a serious problem on the Loess Plateau in Shaanxi?
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Shaanxi
The dramatic karst formations and quiet rivers of Shaanxi province offer a serene contrast to the ancient cityscape of Xi'an.
Soil erosion is a severe and persistent issue on the Loess Plateau in Shaanxi due to a combination of natural environmental factors and human activity.
The region is covered by a thick mantle of loessâa fine-grained, wind-deposited soilâthat is inherently susceptible to erosion. This vulnerability is exacerbated by several key factors:12
- Sparse Vegetation: The lack of natural ground cover leaves the soil exposed to the elements. Human activities, including centuries of cultivation and the removal of vegetation for fuel and livestock feed, have further destroyed the natural plant cover, accelerating soil loss.132
- Climatic Conditions: The plateau is subject to heavy precipitation during the summer, which washes away topsoil, while wind erosion affects the region during drier periods.13
- Topography: The combination of these forces has carved the landscape into a distinctive relief characterized by steep-sided, deep gullies and vertical cliff faces.32
To combat this, the government has implemented extensive programs, including afforestation, the construction of terraces to stabilize slopes, and the building of dams to retain silt.143