长江流域资源与环境 >> 2014, Vol. 23 >> Issue (01): 53-.doi: 10.11870/cjlyzyyhj201401008

• 自然资源 • 上一篇    下一篇

丹江口水库不同水文期真光层深度特征及影响因素分析

屈月明| 蔡庆华| 申恒伦| 李斌   

  1. (1.中国科学院水生生物研究所,淡水生态与生物技术国家重点实验室|湖北 武汉 430072; 2.中国科学院大学|北京 100049)
  • 出版日期:2014-01-20

 VARIATION AND INFLUENCING FACTORS OF EUPHOTIC DEPTH IN DANJIANGKOU RESERVOIR IN DIFFERENT HYDROLOGICAL PERIODS

QU Yueming1,2, CAI Qinghua1, SHEN Henglun1,2, LI Bin1,2   

  1. (1.State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China|2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Online:2014-01-20

摘要:

丹江口水库是南水北调中线工程的引用水源地。于2011~2012年对水库不同水文期的水下光合有效辐照度及引起光衰减的3种主要物质(无机颗粒悬浮物、藻类叶绿素a、溶解性有机碳)进行调查,分析了真光层深度的时空动态及影响因素。结果表明,丹江口水库真光层深度的变化范围为:1036~15350 m;丰水期、平水期和枯水期的均值分别为:6084 m、5353 m、7647 m。丹江库区、汉江库区沿库尾至坝前均有上升的趋势。在丹江库区的敞水区真光层深度较大,水质较好。逐步回归分析表明,丹江口水库水体真光层深度主要受到无机颗粒悬浮物及浮游植物影响,但在不同水期、不同库区影响因素表现不同:在丰水期、平水期,无机颗粒物与浮游植物对真光层深度的深浅起主导作用;枯水期真光层深度波动不大,其主要影响因素为藻类叶绿素a与溶解性有机碳

Abstract:

 The Danjiangkou reservoir, located in the junction area of Hubei Province, Henan Province, and Shanxi Province, is the only water source of the Central Line Project of SouthtoNorth Water Diversion of China, which serves as an important drinking water source for most cities facing severe water shortage in the North China Plain (e.g. Beijin, Tianjin, Shijiazhuang). Understanding the ecological condition of the Danjiangkou reservoir is a valuable knowledge for the regional water resource protection and management. Euphotic depth is one of the most important factors to assess the condition of the aquatic ecosystem because it represents a zone where almost all of the primary production occurs. Investigating the variation of euphotic depth in Danjiangkou reservoir and assessing the influencing factor can improve our understanding on the ecosystem dynamics of the Danjiangkou reservoir and its relationships with light. Relevant results could provide useful information for the sustainable water resource management of SouthtoNorth Water Diversion.
To investigate the spatiotemporal dynamics of euphotic depth and its influencing factors, a total of 25 field sampling sites were investigated during the high flow period, median flow period, and low water period in 2011-2012 in the Danjiangkou Reservoir. First, we investigated the spatiotemporal variations of the underwater photosynthetic active radiation and the concentration of three main substances (inorganic suspended particulate, algal chlorophyll a, dissolved organic carbon). Then, we used the step-wise multiple regression analysis to determine the most important factors affect the variation of euphotic depth in the Danjiangkou Reservoir. The results showed that, the euphotic depth of the Danjiangkou Reservoir range from 104 m to 1535 m, with average values of 608 m, 535 m, and 765 m in the high flow period, median flow period, and low flow period, respectively. In the temporal scale, the highest fluctuation of the euphotic depth was observed in the high flow period (CV=070), and the lowest fluctuation of the euphotic depth was observed in the low water period (CV=019). In the spatial scale, an increasing trend of euphotic depth was observed from the head to the tail in both Hanjiang and Danjiang reservoir basins. The result suggested that, the spatiotemporal variation of euphotic depth was mainly based on the hydrological conditions and impoundment regulation in the river-reservoir hybrid system. The stepwise regression analysis revealed that, the euphotic depth was determined by different factors in different hydrological periods. In the high flow period and median flow period, the euphotic depth was mainly determined by the suspended inorganic particulate and phytoplankton; however, in the low flow period, the he euphotic depth was determined by the chlorophyll a and dissolved organic carbon.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 罗专溪,张 远,郑丙辉,富 国,陆兆华. 三峡水库蓄水初期水生态环境特征分析[J]. 长江流域资源与环境, 2005, 14(6): 781 -784 .
[2] 陈 诚,陈 雯 . 盐城市沿海的适宜开发空间选择研究[J]. 长江流域资源与环境, 2008, 17(5): 667 .
[3] 李晓文,方精云,朴世龙. 上海城市土地利用形成、变化及其空间作用机制[J]. 长江流域资源与环境, 2006, 15(1): 34 -40 .
[4] 李加林,许继琴,童亿勤,杨晓平,张殿发. 杭州湾南岸滨海平原土地利用/覆被空间格局变化分析[J]. 长江流域资源与环境, 2005, 14(6): 709 -713 .
[5] 李玉辉,李忠德,张丹丹,李兆林 ,周顺吉. 石林风景名胜区对乡村经济发展的影响[J]. 长江流域资源与环境, 2004, 13(1): 18 -23 .
[6] 黄真理. 国内外大型水电工程生态环境监测与保护[J]. 长江流域资源与环境, 2004, 13(2): 101 -108 .
[7] 杨志荣,吴次芳, 靳相木, 姚秋萍. 基于DEA模型的城市用地经济效益比较研究[J]. 长江流域资源与环境, 2009, 18(1): 14 .
[8] 吴虹月,包维楷,王 安. 外来种入侵对乡土生物多样性的影响机制[J]. 长江流域资源与环境, 2004, 13(1): 40 -46 .
[9] 徐新良, 庄大方, 贾绍凤, 胡云峰. GIS环境下基于DEM的中国流域自动提取方法[J]. 长江流域资源与环境, 2004, 13(4): 343 -348 .
[10] 徐宪立,张科利,刘 雯,孔亚平, 陈济丁. 青藏公路路堤边坡水土保持措施及效益分析[J]. 长江流域资源与环境, 2008, 17(4): 619 .