洞庭湖与长江水体交换能力的演变特征(英文)

编号 zgly0001585009

文献类型 期刊论文

文献题名 洞庭湖与长江水体交换能力的演变特征(英文)

作者 欧朝敏  李景保  周永强  程伟艳  杨燕  赵中花 

作者单位 CollegeofInformationSystemandManagement  NationalUniversityofDefenseTechnology  CollegeofResourcesandEnvironmentalSciences  HunanNormalUniversity  NanjingInstituteofGeographyandLimnology  CAS  UniversityofChineseAcademyofSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2014年04期

年份 2014 

分类号 P333  P333.4 

关键词 waterexchangecoefficient  evolutionofwaterexchangefunction  DongtingLake  YangtzeRiver 

文摘内容 By using field-survey hydrological data of the related control stations in Dongting Lake and the Yangtze River mainstream in 1951–2010, the evolution characters of water exchange abilities between the two water bodies and their response to the operation of the Three Gorges Reservoir(TGR) from different time scales are analyzed based on their hydraulic relations. The results are shown as follows. Firstly, during July-September, the replenishment ability of Three Outlets to Dongting Lake is stronger, and in January-March, the replenishment ability of Dongting Lake to Yangtze River is stronger. Secondly, there has been an obvious inter-decadal wave on the water exchange coefficient between Dongting Lake and Yangtze River. In 1951–1958 and 1959–1968, the replenishment ability of Three Outlets to Dongting Lake was stronger, but in 2003–2010, the replenishment ability of Dongting Lake to Yangtze River has been strengthened. Thirdly, the spill-division ability of Three Outlets weakens, and the water of Dongting Lake coming from Three Outlets decreases either in typical years or under different dispatching modes of the TGR after the operation of the Three Gorges Reservoir. Furthermore, the water of Dongting Lake coming from Four Rivers takes the dominant position, which obviously enhances the replenishment ability of Dongting Lake to Yangtze River. Fourthly, if the effect of the runoff fluctuation in the basin is not considered, the evolution characters of the exchange capacities and the exchange process between Dongting Lake and Yangtze River in different time scales are generally changed with the variation of the water exchange amount between them, although the factors influencing the water exchange capacities between them is very complex. These show that there is an in-line growth or decline relation between the river-lake water exchange ability and the river-lake water exchange amount.