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Pollen analysis of water samples of the Yellow River and the Luan River revealed that pollen grains were carried as sedimentary particles in water. The fluctuation in number of pollens grains in river water was related to the sand bearings of the water, not to the river flow. The changes of pollen percentage showed no clear evidence of sorting by river, but the changes of pollen concentration did.
Pollen analysis of water samples of the Yellow River and the Luan River revealed that pollen grains were carried as sedimentary particles in water. The fluctuation in number of pollens grains in river water was related to the sand bearings of the water, not to the river flow . The changes of pollen percentage showed no clear evidence of sorting by river, but the changes of pollen concentration did.