Palaeohydrological reconstructions achieved from palaeoclimatic conditions and palaeochannel morphology for southern Hebei,the North China Plain  

作　　者：WANG Hong-ya XIE Qiang(Peking University, Beijing 100871, China) 

出　　处：《Journal of Geographical Sciences》1999年第1期1-14,共14页地理学报（英文版）

摘　　要：Palaeorunoff regimes were reconstructed using the equations relating annual runoff to climatic parameters and palaeoclimatic information acquired mainly by pollen analysis and peat investigation for southem Hebei (114~117°E, 36~38°N) during the last 70 000 years. With the morphological data of palaeochannels preserved in the same region, discharge estimates were calculated with the equations relating discharge to morphological parameters of channel for the palaeorivers acting during the last 25 000 years. For the last 25 000 years, the reconstructed palaeorunoff regimes were compared to the corresponding palaeodischarge ones. This comparison indicates the same trend of hydrological changes occurring in southern Hebei during the last 25 000 years. During 8 000~25 000 or 7 500~25 000 a B.P, the quantity of surface water was rather small and probably just 46 or 60 percent of the one for the interval of 3 000~8 000 or 2 500~7 500 a B.P The surface water was the least during 0~3 000 or 0~2 500 a B.P, being 34 or 33 percent of the one occurring during 3 000~8 000 or 2 500~7 500 a B.P The maximum surface water occurred during 3 000~8 000 or 2 500~7 500 a B.P. when the runoff ranged 147.6~398.0 mm and discharge 210-324 m3/s.Palaeorunoff regimes were reconstructed using the equations relating annual runoff to climatic parameters and palaeoclimatic information acquired mainly by pollen analysis and peat investigation for southem Hebei (114~117°E, 36~38°N) during the last 70 000 years. With the morphological data of palaeochannels preserved in the same region, discharge estimates were calculated with the equations relating discharge to morphological parameters of channel for the palaeorivers acting during the last 25 000 years. For the last 25 000 years, the reconstructed palaeorunoff regimes were compared to the corresponding palaeodischarge ones. This comparison indicates the same trend of hydrological changes occurring in southern Hebei during the last 25 000 years. During 8 000~25 000 or 7 500~25 000 a B.P, the quantity of surface water was rather small and probably just 46 or 60 percent of the one for the interval of 3 000~8 000 or 2 500~7 500 a B.P The surface water was the least during 0~3 000 or 0~2 500 a B.P, being 34 or 33 percent of the one occurring during 3 000~8 000 or 2 500~7 500 a B.P The maximum surface water occurred during 3 000~8 000 or 2 500~7 500 a B.P. when the runoff ranged 147.6~398.0 mm and discharge 210-324 m3/s.

关 键 词：PALAEOHYDROLOGY PALAEOCLIMATE PALAEOCHANNEL southern Hebei 

分 类 号：P531[天文地球—古生物学与地层学]