Land Subsidence in the United States¶
Galloway, D. L., Jones, D. R., & Ingebritsen, S. E. (1977). Land Subsidence in the United States. U.S. Geological Survey.
Cited by¶
3 citations across 3 artifacts.
Each citation links to the sentence it supports in the citing article.
Domain-specific¶
- Groundwater Overdraft
- The defining feature distinguishing overdraft from drought or temporary shortfall is partial irreversibility of the consequences: subsidence from compaction of fine-grained aquitard layers is permanent, because clay consolidates under de-watering and cannot re-expand
This sourceThe USGS survey of land subsidence in the United States, in which aquifer-system compaction is a principal cause.
Supported in partVerified against a saved copy of the source
“The principal causes are aquifer-system compaction, drainage of organic soils, underground mining, hydrocompaction, natural compaction, sinkholes, and thawing permafrost”
- The defining feature distinguishing overdraft from drought or temporary shortfall is partial irreversibility of the consequences: subsidence from compaction of fine-grained aquitard layers is permanent, because clay consolidates under de-watering and cannot re-expand
- Subsidence
- In the most common anthropogenic form, groundwater extraction lowers pore-water pressure in aquifer layers; by the Terzaghi effective-stress principle, the reduction in pore pressure raises the grain-to-grain effective stress, compressing the aquifer skeleton and the surrounding fine-grained aquitards — the San Joaquin Valley subsided more than 8 m between the 1920s and 1970s by this mechanism, with clay-layer compaction producing an irreversible reduction in aquifer storage.
SupportedVerified against a saved copy of the source
“effective stress first proposed by Karl Terzaghi (Terzaghi, 1925). By this principle, when the”
- In the most common anthropogenic form, groundwater extraction lowers pore-water pressure in aquifer layers; by the Terzaghi effective-stress principle, the reduction in pore pressure raises the grain-to-grain effective stress, compressing the aquifer skeleton and the surrounding fine-grained aquitards — the San Joaquin Valley subsided more than 8 m between the 1920s and 1970s by this mechanism, with clay-layer compaction producing an irreversible reduction in aquifer storage.
- Subsidence Basin
Verification¶
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Registry ID ref:5a7a9e67f20c · see in the full table