The formation of loess deposits in the Tashkent region and parts of Central Asia; and problems with irrigation, hydrocollapse and soil erosion

摘要: Abstract There are large problems of irrigation, hydrocollapse and soil erosion associated with the loess deposits Central Asia. To get to grips these we need a clear view nature formation loess, in this region there still disputes disagreements controversies. Important events deposit process can be identified studied, relative significances assigned. vicinity Tashkent, north-east Uzbekistan. These were mapped studied for many years by G.A. Mavlyanov associates; they used terminology which appears based on Pavlov's nineteenth century usage developed ‘polygenetic’ theory deposits. This was very much Asia essentially favouring ‘proluvial’ mechanism. A speculative look at near Tashkent allows alternative terminologies mechanisms considered. In particular widespread Soviet antipathy aeolian deposition examined. The Chirchik river, upstream might affected Pavlov mechanisms, but could topped collapse when wetted is controlled ground significant interaction water, Hydrocollapse water closely related complex ground. Dust clouds eastern Uzbekistan largely related, west dust material raised from drying Aral Sea bed; often clay mineral agglomerate carry dangerous pollutants.