A Field Guide to British Rivers. George Heritage

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СКАЧАТЬ BC SPC BCPR PBR B W A PLR POR PRBR IST Bedrock cascade U R R R Bedrock controlled rapid U R R R Bedrock influenced pool U R R R Hydraulically controlled rapid C C C C Obstruction induced rapid O O O O Coarse sediment pool O C C C Waterfall C O R R Plunge pool bar O C O O Boulder cascade C C U U Bedrock step U R R R Boulder step C C O O Bedrock pool U R R R Isolated boulder C U U U R R Lateral bar O O R C C C Lee bar R C O R R R Fine sediment drape O O O C C U C C C U Inner bend bar O O СКАЧАТЬ