I'm no geologist, but my answer is 'not necessarily'. The definition is the 'overlap of two alluvial fans'. While this overlap may be most obvious in a desert environment, I would think that subsequent events and deposition could result in bajadas which are, well, under cities!
A bajada is an alluvial plain formed at the base of a mountain by the coalescing of several alluvial fans.
Reuben Bajada was born in 1985.
Clint Bajada was born on June 24, 1982.
Clint Bajada was born on June 24, 1982.
Roderick Bajada was born on 1983-01-04.
Shaun Bajada was born on 1983-08-19.
A bajada is a slope in the southwestern United States, a part of a piedmont slope made of rocky detritus.
Clint Bajada is 29 years old (birthdate: June 24, 1982).
Alluvial fans
A bajada may be created. A bajada is a broad, gently sloping surface formed by the coalescing of alluvial fans.
Cacti of the Patagonian Desert:AustrocactusAustrocactus bertiniiAustrocactus coxiiAustrocactus gracilisAustrocactus hibernusAustrocactus patagonicusAustrocactus spiniflorusEchinopsisEchinopsis leucanthaGymnocalyciumGymnocalycium gibbosumvar. brachypetalumvar. chubutensevar. nigrumMaihueniaMaihuenia patagonicaMaihuenia poeppigiiMaihueniopsisMaihueniopsis darwiniiMaihueniopsis hickeniiMaihueniopsis platyacanthaPterocactusPterocactus araucanusPterocactus australisPterocactus fischeriPterocactus hickeniiPterocactus tuberosusPterocactus valentiniiPterocactus spec. from Buta RanquilPterocactus spec. from Bajada del AgrioPyrrhocactusPyrrhocactus straussianus
A bahada is an alternative term for a bajada, a slope found in the southwestern United States, specifically part of a piedmont slope made of rocky detritus.