地理科学 ›› 2014, Vol. 34 ›› Issue (12): 1488-1496.doi: 10.13249/j.cnki.sgs.2014.012.1488

• • 上一篇    下一篇

鄱阳湖水文节律变化及其与江湖水量交换的关系

戴雪1,2(), 万荣荣1(), 杨桂山1, 王晓龙1   

  1. 1.中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏 南京 210008
    2.中国科学院大学,北京 100049
  • 收稿日期:2013-03-15 修回日期:2013-06-25 出版日期:2014-12-10 发布日期:2014-12-10
  • 作者简介:

    作者简介:戴 雪(1988-),女,博士研究生,主要从事资源利用与生态环境效应研究。E-mail:daixue1224@163.com

  • 基金资助:
    国家重点基础研究发展计划(2012CB417006)、国家自然科学基金(41271500)资助

Temporal Variation of Hydrological Rhythm in Poyang Lake and the Associated Water Exchange with the Changjiang River

Xue DAI1,2(), Rong-rong WAN1(), Gui-shan YANG1, Xiao-long WANG1   

  1. 1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2013-03-15 Revised:2013-06-25 Online:2014-12-10 Published:2014-12-10

摘要:

在气候变化、人类活动导致流域水循环改变、极端水文事件频发的背景下,从江湖关系角度分析鄱阳湖水文节律变化规律,对于维护流域水安全具有重要意义。利用1951~2011年湖区4站及湖口站水文实测资料,采用统计分析及水文过程分析方法,对湖泊水文节律在2003~2011年与1980~2002年发生的显著变化及其与长江水量交换的关系进行研究。结果表明:2003~2011年,湖泊因涨、退水阶段水位均偏低,进而枯水阶段延长,同时丰水阶段缩短,湖泊水文节律整体呈现洪旱急转情势;近年来江湖水量交换的变化是造成湖泊水文节律变化的主要原因。

关键词: 水文节律, 江湖水量交换, 湖泊水情, 长江, 鄱阳湖

Abstract:

Watershed hydrological cycle has been changed along with the intensifying frequency of extreme water events due to the influence of climate change and human activities. Poyang Lake, the largest freshwater lake in China, is a lake naturally connected with the Changjiang River. The complicated river-lake interactions impact the hydrological rhythm of lake, which will further influence water security associated with flood control, drinking water usage, water pollution and water ecology in the lake basin. In the case, it is of great importance for maintaining watershed water security to understand the characteristics of hydrological rhythm variation in terms of river-lake interactions. In this study, temporal variation of hydrological rhythm in Poyang Lake and the associated water exchange with the Changjiang River were analyzed based on the measured hydrological data of 4 gauge stations in Poyang Lake area along with other data from the Hukou station at the intersection between the Changjiang River and Poyang Lake in 1951-2011. The major findings are shown as follows: the span of dry season increased since water level remains low in November and April. Meanwhile, the span of flood season decreased in 2000s. The lower water level in rising season and retreating season make Poyang Lake rising later but falling earlier than they did in 1980-2002, thus shortening the conversion time of the lake from flood situation to dry situation. Further, the peak flow in the annual hydrograph has been shifted. The primary cause of hydrological rhythm variation is the water exchange between the main stream of the Changjiang River and Poyang Lake. In 2000s, changes in the water level of the Changjiang River altered the interaction between the river and Poyang Lake through the slope of water surface, disturbing the lake basin hydrological processes and resulted in disordering of hydrological rhythm in Poyang Lake. The increasing discharge from the lake to the river in retreating season lead to the lake enter dry season earlier. And the declining water level of Changjiang River in rising season lead to the addition of lake water continued to leak river, thus the lake rose slowly. For the reasons given above, the variation of water supplement of Poyang Lake on the Changjiang River mainstream in 2000s altered the hydrological rhythm in Poyang Lake. Results of this study improve our understanding of Poyang Lake hydrological rhythm consequences of river-lake relationship changes, and it provides knowledge for long-term planning for effectively restoring nature's innate rhythms for sustainability and productivity in the Poyang Lake Basin. In addition, the results will help further explore the coordinate and healthy river-lake relationships.

Key words: hydrological rhythm, river-lake water exchange, lake hydrologic regime, the Changjiang River, Poyang Lake

中图分类号: 

  • P333.5