摘要
据称,随着集水区泥沙产量的增加,洞里萨湖正在快速地被泥沙填满。湖泊盆地的填充将会对柬埔寨中部和湄公河三角洲地区的洪水泛滥规模带来严重影响,并威胁到湖泊独特的生态系统。本文中,我们综合概述了泥沙芯的放射性碳年代测定结果和水力模型结果,对这个问题进行了基于经验的评估。我们发现湖泊盆地本身目前的沉积速度很低,并已持续了几千年。但是,湖泊周边及洪泛平原中的沉积相对较高,从而引发了河岸群落的一系列问题。
It has been claimed that Tonle Sap Lake is rapidly filling with sediment as a result of increasing sediment yields from the catchment.Infilling of the lake basin would have serious implications for the magnitude of flooding in central Cambodia and the Mekong Delta region and threaten the lake's unique ecosystem.In this article,we synthesize the results of radiocarbon dating of sediment cores and hydrodynamic modeling results to provide an empirically based assessment of this issue.We find that current sedimentation rates within the lake basin proper are low and have been for several millennia.However, sedimentation at the lake margin and in its floodplain is relatively high,which presents a range of issues for riparian communities.
