Water level is an important index for studying hydrologic processes. Water level rise processes were studied in three catchments(catchment I, II, III in Chen Jiagou watershed in the Three Gorge Reservoir Area) with di...Water level is an important index for studying hydrologic processes. Water level rise processes were studied in three catchments(catchment I, II, III in Chen Jiagou watershed in the Three Gorge Reservoir Area) with different areas to provide useful information to inform data extension from a gauged-catchment to an ungauged catchment. The results showed that there are seasonal changes in the dominant driving mode of the rise of the water level. The rise of the water level in March is likely mainly driven by the mode of stored-full runoff, and in September or October, it is mainly driven by Horton-flow. The correlation coefficients of all indexes were significant among the three catchments, suggesting that these catchments have similarities and that water level data extension is likely to be completed successfully between the large catchment(III-Catchment) and the small catchment(ICatchment). It was confirmed that there is good similarity between the 0.6 km^2 and 6 km^2 catchments, and the data correlation is good between the catchments with the area differences in the Three Gorges Reservoir Area. In addition, the rise processes of the water level in the catchments were not only different under the same rain conditions, but this difference could also change with the rain condition.展开更多
This paper presents underwater relict forest fossil and ancient coast formation exploration results in the eastern Baltic Sea. Tree fossils and sediment layers discovered in the sea-bed were dated with 14^C along with...This paper presents underwater relict forest fossil and ancient coast formation exploration results in the eastern Baltic Sea. Tree fossils and sediment layers discovered in the sea-bed were dated with 14^C along with palynological and dendrological analysis. Based on the obtained data, a fragment of submerged early Holocene landscape, coastline of the Yoldia Sea and Ancylus Lake has been reconstructed. The research data determine that vegetation and natural conditions of the Yoldia Sea coastal were favourable for Early Mesolithic communities. Well-preserved relict pine forest dates are also crucial to Baltic Sea water level dynamics analysis during the period： end of Yoldia Sea-Ancylus Lake.展开更多
This article presents the results of dividing the hydrogeological structure zones in aquifer of Cai Phan Rang river basin, Ninh Thuan province, Viet Nam, and the relationship between parameters of hydrogeological stru...This article presents the results of dividing the hydrogeological structure zones in aquifer of Cai Phan Rang river basin, Ninh Thuan province, Viet Nam, and the relationship between parameters of hydrogeological structure zones with water storage capacity of hydrogeological structure. Research results divided hydrogeological structure of Cai Phan Rang River Basin into four zones, including three zones with depression bedrock and one zone with slope bedrock, and the results assessed： （1） specific discharge of exploitation well is proportional to zone area of hydrogeological structure; （2） specific discharge of exploitation well is inversely proportional to slope of bedrock surface, slope of water level in zone and area of drainage surface of hydrogeological structure zone; （3） water level fluctuation in zone is proportional to slope of bedrock surface, slope of water level in zone and inversely proportional to distribution area of zone; （4） total mineralization of water is proportional to bedrock surface slope and water level slope in zone, and inversely proportional to drainage surface area of zone and volume of structural depression. Research results are practical significance in solutions proposal to increase exploitation capacity for various water use purposes.展开更多
基金funded by West Light Foundation of The Chinese Academy of Sciences,CASthe State Council Three Gorges Construction Committee Project of China
文摘Water level is an important index for studying hydrologic processes. Water level rise processes were studied in three catchments(catchment I, II, III in Chen Jiagou watershed in the Three Gorge Reservoir Area) with different areas to provide useful information to inform data extension from a gauged-catchment to an ungauged catchment. The results showed that there are seasonal changes in the dominant driving mode of the rise of the water level. The rise of the water level in March is likely mainly driven by the mode of stored-full runoff, and in September or October, it is mainly driven by Horton-flow. The correlation coefficients of all indexes were significant among the three catchments, suggesting that these catchments have similarities and that water level data extension is likely to be completed successfully between the large catchment(III-Catchment) and the small catchment(ICatchment). It was confirmed that there is good similarity between the 0.6 km^2 and 6 km^2 catchments, and the data correlation is good between the catchments with the area differences in the Three Gorges Reservoir Area. In addition, the rise processes of the water level in the catchments were not only different under the same rain conditions, but this difference could also change with the rain condition.
文摘This paper presents underwater relict forest fossil and ancient coast formation exploration results in the eastern Baltic Sea. Tree fossils and sediment layers discovered in the sea-bed were dated with 14^C along with palynological and dendrological analysis. Based on the obtained data, a fragment of submerged early Holocene landscape, coastline of the Yoldia Sea and Ancylus Lake has been reconstructed. The research data determine that vegetation and natural conditions of the Yoldia Sea coastal were favourable for Early Mesolithic communities. Well-preserved relict pine forest dates are also crucial to Baltic Sea water level dynamics analysis during the period： end of Yoldia Sea-Ancylus Lake.
文摘This article presents the results of dividing the hydrogeological structure zones in aquifer of Cai Phan Rang river basin, Ninh Thuan province, Viet Nam, and the relationship between parameters of hydrogeological structure zones with water storage capacity of hydrogeological structure. Research results divided hydrogeological structure of Cai Phan Rang River Basin into four zones, including three zones with depression bedrock and one zone with slope bedrock, and the results assessed： （1） specific discharge of exploitation well is proportional to zone area of hydrogeological structure; （2） specific discharge of exploitation well is inversely proportional to slope of bedrock surface, slope of water level in zone and area of drainage surface of hydrogeological structure zone; （3） water level fluctuation in zone is proportional to slope of bedrock surface, slope of water level in zone and inversely proportional to distribution area of zone; （4） total mineralization of water is proportional to bedrock surface slope and water level slope in zone, and inversely proportional to drainage surface area of zone and volume of structural depression. Research results are practical significance in solutions proposal to increase exploitation capacity for various water use purposes.
